Welch Allyn Medical Division
WELCH ALLYN ATLAS PATIENT MONITOR iSERVICE MANUAL 6200-43E REV. A
Drawings and/or illustrations and/or part numbers contained in this documentare for reference purposes only. For current revisions call the Welch AllynCustomer Service phone number listed in Section 1 page 2.
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ii WELCH ALLYN ATLAS PATIENT MONITOR SERVICE MANUAL 6200-43E REV. A
Contents PAGE
Section 1: General Information1.1 About the Atlas ............................................................................................................ 11.2 Technical Help Information, Worldwide Tech Support Phone Number ........................... 21.3 Product Model Number Structure ................................................................................. 31.4 Main Menu Architecture ................................................................................................ 61.5 Atlas System Block Diagram ........................................................................................ 7
Section 2: Service (See User Manual 6200-42E for Atlas Specifications)2.1 Incoming Inspection,Checklist ...................................................................................... 12.2 Repair Tests ............................................................................................................. 2-4 Table 2-1 :Tools Required for Service, Calibration and Software Loading ................... 5 Table 2-2:Software/Firmware Revision Levels ............................................................ 62.3 Calibration Procedures
BP Calibration - Section 2.3.1 ........................................................................... 7ETCO2 Calibration (623Models only) - Section 2.3.2 ......................................... 7&8CO2 Reset (623Models only) - Section 2.3.3 ........................................................ 9Printer Calibration - Section 2.3.4 ....................................................................... 10Battery Voltage Calibration (Models 622xx and 623xx only)- Section 2.3.5 .... 10&11Temperature Measurement Subsystem Calibration- Section 2.3.6 ...................... 12Set Battery Charge Voltage-Section 2.3.7 .......................................................... 13
2.4 SoftwareSoftware Chart#2.4.1.......................................................................................... 14Downloading Operating System 2.4 .................................................................... 15
2.5 Downloading NVRAM Text files ............................................................................ 15&162.6 Downloading Software and NVRAM Text files ............................................................. 162.7 Product Numbering Structure .................................................................................... 17
Section 3: Troubleshooting (Also see Atlas Operator’s manual Appendix E)3.1 Functional Tests/ Initial Diagnostic Steps ...................................................................... 13.2 Technical Troubleshooting Tables: Complaint/Cause/Corrective Action ....................... 123.3 Top Level Troubleshooting Index .................................................................................. 153.4 Diagnostic Tests and Test Setups ............................................................................... 17
Section 4: Disassembly and RepairAbout Section 4 .................................................................................................................... 14.1 Model 200 Dissassembly .............................................................................................. 24.2 Model 200 Re-assembly .............................................................................................. 134.3 Other Models notes ..................................................................................................... 15
WELCH ALLYN ATLAS PATIENT MONITOR iiiSERVICE MANUAL 6200-43E REV. A
Appendix Section:A ............................................................................................................... theory of operationsB ...................................................................................................................... repair parts listC.................................................................................... interconnect diagram 620396 Rev AD...................................................................... electrical schematics and circuit board layoutsE ...........................Safety Tests: Required Equipment and Procedures and Test Results Form
Section 1 - General Information
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS PATIENT MONITOR 1
1.1 About the Atlas MonitorThe Atlas combines in one unit all the necessary mea-surements for patients under anesthesia, for surgicalrecovery, or bed side monitoring. See Section 1.3 for acomplete listing of product models and options.
According to the standards of care for Nurse Anesthe-tists and Anesthesiologists, all patients receiving con-scious sedation are to be continuously monitoredthroughout the procedure and recovery phase by ECG,SpO
2, and NIBP. CO
2 monitoring is a requirement dur-
ing gas anesthesia (when patient is ventilated).
The Atlas combines a CRT to display ECG and CO2
waveforms and LEDs for the other numeric values tomaximize visibility and viewing angle. Although notdesigned to be a transport product, the monitor has anintegral handle and it is small and light enough at 13 lbto be easily moved. A one hour battery enables themonitor to be moved with the patient from the surgeryroom to recovery room. It also maintains unit operationfor up to an hour when power is interrupted.
IMPORTANT: for a complete description on the func-tion and use of the Atlas, as well as user safety warn-ings, cautions, and warranty information, read andunderstand the Atlas Operator’s Manual part number6200-42E (English). Other languages are available.
Section 1 - General Information
SERVICE MANUAL 6200-43E REV . A2 WELCH ALLYN ATLAS PATIENT MONITOR
1.2Help Information
All service and repairs must be performed by fully trainedand properly equipped personnel, using genuinereplacement parts and correct procedures. Failure to doso will invalidate the product warranty.
Read and understand all safety warnings andservice notes printed in this Service Manual and theOperator’s Manual part number 6200-42E. If indoubt about any precaution or procedure, forphone help, or to order additional copies of theAtlas Operator’s Manual, contact:
Customer ServiceWelch Allyn, Inc.4341 State Street Road, PO Box 220Skaneatles Falls, NY 13153-0220 U.S.ATelephone 1-800-535-6663
When calling, refer to the model number on thebottom of the Atlas. The Model Number is the first threedigits of the Serial number number found on the bottomof the Atlas.
Treat all returned opened Nasal CO2 Sample Linesand watertraps as Bio Hazard material and disposeof them in an approved manner.
Troubleshooting assistance is contained in Section 3 ofthis manual to help determine which board ismalfunctioning. This manual does not support repairingthe printed circuit boards.
Year 2000 Information: The Atlas is Y2K compliant andwill not encounter “Year 2000” problems.
Safety Warnings
Section 1 - General Information
SERVICE MANUAL 6200-43E REV A WELCH ALLYN ATLAS PATIENT MONITOR 3
1.3 Product Model Number Structure
621S0 ECG, Nonin SpO2, NIBP
621SP ECG, Nonin SpO2, NIBP, Printer
622S0 ECG, Nonin SpO2, NIBP, Temp, Respiration, Battery, RS232
622SP ECG, Nonin SpO2 , NIBP, Temp, Respiration, Battery, RS232, Printer
622N0 ECG, Nellcor SpO2, NIBP, Temp, Respiration, Battery, RS232
622NP ECG, Nellcor SpO2, NIBP, Temp, Respiration, Battery, RS232, Printer
623SP ECG, Nonin SpO2, NIBP, ETCO2, Temp, Respiration, Battery, RS232, Printer
623NP ECG, Nellcor SpO2, NIBP, ETCO
2, Temp, Respiration, Battery, RS232, Printer
SUFFIX:
Use letter designation for language localization as follows:E = English, F= French, G= German, I= Italian, S= Spanish, P= Portuguese C = Chinese,J= Japanese
Use number designation for line cord localization as follows:
1 = US, Canada, Japan Version2 = European Version4 = United Kingdom Version6 = Australian Version
Section 1 - General Information
4 WELCH ALLYN ATLAS PATIENT MONITOR SERVICE MANUAL 6200-43E REV A
1.4 Main Menu Architecture
Also note that this is for the 623xx system.• On a 622xP system, delete the CO2 Reset box , the Calibrate CO 2 item, and the CO2
units item.• On a 621xP system, delete the CO2 Reset box , the Calibrate CO 2 item , the CO2
units item, Respiration speed item, the Temperature units item, and the Batterytest item.
• On systems without printers (621x0 and 622x0) delete the Printer test pattern item.
*
* The Display A/D Channels also lets you press <SET> up and down to display additionalsets of information, but does not change the menu page that you are on, just writesdifferent information on the right side of the screen.
Section 1 - General Information
SERVICE MANUAL 6200-43E REV A WELCH ALLYN ATLAS PATIENT MONITOR 5
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Section 2 - Service
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 1
2.1 Incoming Inspection
o 2.1.1 Inspect shipping package and productfor damage. Make a record of possibleshipping damage.
2.1.2 List accessories in box.o power cordo SpO2 probeo ECG leadso ECG lead cableo Cuff(s)o Operator Manualo nasal C02 Lineo ECG Electrode(s)o temperature probeo BP tubingo papero loose parts, describe
o 2.1.3 Clean and disinfect by following theinstructions printed in the OperatorManual.
o 2.1.4 Operate the Atlas to verify the customercomplaint before making any changes tothe unit. Call the customer if the complaintis unclear.
NOTE: Perform REPAIR TESTS inSection 2.2 to fully inspect theAtlas monitor before and afterservicing. Refer to Section 3for Troubleshooting help.
2.1.5 If the unit has caused or is suspected ofhaving caused an injury of any type:
DO NOT DISASSEMBLE OR REPAIRTHE UN IT IN ANY WAY.Contact Welch Allyn Customer Serviceimmediately.
Service Intervals forCalibration and Main-tenance are listed inAtlas Operator ’sManual Appendix C.
Section 2 - Service
2 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
2.2 Repair Tests 2.2.1 Blood Pressure System Leakage Test:Unit must not leak more than 5 mmHg in a 15second interval while attached to a 100 ccvolume at test pressures of 50mmHg and250mmHg.
Need:100cc (+10/-0cc) test cavitystopwatchsqueeze bulb
2.2.1.1 Connect Atlas to test 100cc volume andSetra Gage as shown in Figure 2.3.1.1
2.2.1.2 Turn Atlas ON2.2.1.3 Press Time and Date button to access
Options Menu.2.2.1.4Press Lead Select button to select
Service Mode. Select Verify Manometer2.2.1.5Pressurize the Atlas with squeeze bulb
to 50mmHg.NOTE: Allow reading to stabilize for 15 seconds.
2.2.1.6Observe pressure for 15 additionalseconds. Unit should not leak more than5mmHg during this time.
2.2.1.7Perform this process at 250mmHg
2.2.2 Dump Test:Unit must be able to deflate a 500 cc volumefrom greater than 260.0 mmHg to less than15.0 mmHg in 10 seconds or less.
2.2.3 Manometer Accuracy TestInternal temperature of the unit must be lessthan 32.0 degrees Celsius before performingtest.
2.2.3.1 The primary transducer must be within +/-0.75 mmHg at 0 +/-0.3 mmHg. The safetytransducer must be within +/-1 mmHg at0+/-0.3 mmHg.
2.2.3.2 The primary transducer must be within +/-1.5 mmHg at 50 +/-5.0 mmHg. The safetytransducer must be within +/-1.5 mmHg at50 +/- 5.0 mmHg.
2.2.3.3 The primary transducer must be within +/-1.5 mmHg at 150 +/-5.0 mmHg. Thesafety transducer must be within +/-4.5mmHg at 150 +/- 5.0 mmHg.
2.2.3.4 The primary transducer must be within +/-
Manometer Accuracy Test
BP Dump Test
BP Leak Test
Section 2 - Service
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 3
2.2.4 Deflation Test:With the unit connected to a large adult cuffand a target inflation pressure of 200 mmHg*have the unit perform a complete “normal”BP cycle.For steps two and three, the size of the stepmust be between 3.0 mmHg and 11.0 mmHg.Step 4 and all other steps above or equal to40 mmHg, step size must be between 7.0mmHg and 11.0 mmHg. All steps below 40mmHg, except for the last step, will bebetween 4.5 mmHg and 10 mmHg. The laststep will be between 0.01 mmHg and 10mmHg.
2.2.5 Charge Voltage Test:Check battery charging circuit:Specification :No Load: 6.85VDC acrossright pin (+) and left pin (-) of Main PCBbattery charge connector.
2.2.6 Hardware Fail Safe Tests2.2.6.1 Over Pressure Test:
Atlas hardware must detect overpressure on unit pneumatic systembetween 296.0 mmHg and 329.0 mmHg.
2.2.6.2 Over 15 mmHg Test:Atlas hardware must detect if thepneumatic system has been pressurizedgreater than 15 mmHg for more than 155seconds but less than 180 seconds.
2.2.6.3 Under 15 mmHg Test:Atlas hardware must detect if thepneumatic system has been pressurizedless than 15 mmHg for more than 25.0seconds but less than 35.0 secondsbefore alowing new inflation cycle in “non-Stat” Auto Mode.
2.2.7 RS232 Test:The RS232 communication operationwill be confirmed with successfulserial transmit and receive.
2.2.8 Printer Option Test:The printer must be able to print out the testpattern . Inspect print quality.
RS232 Test
Printer Option Test
Deflation Test
Charge Voltage Test
Hardware Fail Safe Tests
* Go to service modescreen and set initial
pressure to 200mmHg.
Section 2 - Service
4 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
ECG Test
SpO2 Test
2.2.9 ECG Test:Use a calibrated simulator to checkperformance.NOTE: There is no calibration for the ECG orimpedance Respiration subsystems.If the performance does not match up to thatexpected using a calibrated simulator thenthere could be a problem with the cable, leads,connectors, wiring or the main board itself. Ifthe main board is faulty then replace it.
2.2.10SpO2 Tests:Need:
Appropriate Phantom finger setSpO2 cuff and cableOr:Nellcor or Nonin (as fitted) simulator(replaces cuff to drive subsystem)Or:Calibrated SpO2 simulator that has a cufffitting that simulates a perfused finger
Nonin : Settings for NoninPatient Simulator8000S are 98% O2 / 80 BPM. SpO2 boardaccuracy after 25 second stabilization periodmust be within +/-2%O2 and +/- 2BPM.Nellcor: Settings for Nellcor Patient SimulatorSRC-2 are 81% O2 and 112 BPM. SpO2 boardaccuracy after 25 second stabilization periodmust be within +/-2% O2 and +/- 2 BPM.
2.2.11 TEMP ACCURACY VERIFICATIONNeed:Calibrated thermometer (DIGITAL OR GLASS)small insulated container with cover for warm water2.2.11.1Fill container wtih approximately 96 degree
F water2.2.11.2Attach temperature probe neaqr the sensing
part of the thermometer and insert into thewarm water.
2.2.11.3Accuracy must be within +/- 0.2 degrees F.
Temperature Test
NOTE:There is nocalibration for the SpO2 andPulse subsystem. If theperformance does notmatch up to that expectedusing a calibrated simulator,or the Phantom finger set,then the subsystem boardmust be replaced.
NOTE:Section 3 of this ServiceManual containstroubleshooting steps forthe ECG subsystem.These tests will helpdetermine if the mainboard is faulty.
6 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
Section 2 - Service
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OS126 99/8/9,0004.10.AA 99/02/6,0000.10.AA 7V
PS126 99/8/9,0004.10.AA 99/02/6,0000.10.AA 7V
OS226 99/8/9,0004.10.AA 99/02/6,0000.10.AA 7V
PS226 99/8/9,0004.10.AA 99/02/6,0000.10.AA 7V
ON226 99/8/9,0004.10.AA 99/02/6,0000.10.AA 79/71/210.0.2.1V
PN226 99/8/9,0004.10.AA 99/02/6,0000.10.AA 79/71/210.0.2.1V
PS326 99/8/9,0004.10.AA 99/02/6,0000.10.AA 7V 00.1VE.0
PN326 99/8/9,0004.10.AA 99/02/6,0000.10.AA 79/71/210.0.2.1V 00.1VE.0
Table 2-2:Software/Firmware revision levels
Section 2 - Service
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 7
2.3.1 BP Calibration :Need: 500cc vessel (approximate)
calibrated digital manometersqueeze bulb with one-way valvetubing and T fittingsPC with HyperTerminal *serial cable
2.3.1.1 Connect: manometer, bulb, and 500cc vesselto BP port with “T” connectors, Atlas to PCwith serial cable.
2.3.1.2 Turn AtlasON and start HyperTerminal on PC.2.3.1.3 Enter commands on Serial interface:
Pangea> bp valve close<ENTER>Pangea> bp safety off<ENTER>
2.3.1.4 Enter command:Pangea> bp cal 5000
Do not press <ENTER> yet!2.3.1.5 Raise pressure with bulb to as close to
50.00mmHg as possible or slightly higher. Letthe pressure bleed down toexactly50.00mmHg. Now press <ENTER> . Take nomore than 3 minutes for this step.
2.3.1.6 Enter command:Pangea> bp cal 25000<ENTER>
2.3.1.7 Repeat step 2.3.1.5 with 250.00 as target.Press <ENTER> when pressure deteriorates to
250.00 mmHG.2.3.1.8 Enter command:
Pangea> nvram write<ENTER>2.3.1.9 Disconnect serial cable and instruments and
cycle power on Atlas. BP cal complete.2.3.1.10 Verify accuracy of pressure settings
by repeating step 2.3.1.3 then 2.3.1.5 andcompare Atlas front panel reading with Setrareadout. Do this at 50.00mm and 250 mm Hg.
2.3.2 ET CO2 Calibration: 623 Models onlyNeed: Tank of approximately 10% CO2, balance N2
(certified) Blood Gas MixtureTubing and T connectorsWatertrap and scrubber
2.3.2.1 Insert water trap. Power up.2.3.2.2 Place the instrument into Service Mode: Press
Date/Time Lead Select button.2.3.2.3 Select Calibrate CO2
Message “Remove CO 2 water trap ” willappear.
2.3 Calibration
2.3.1 BP Calibration
Caution: Improper use, stor-age, handling of compressedgas vessels can cause injuryor death! Follow gas manu-facturers safety processes.
Setra
500cc volume
Figure 2.3.1.1
2.3.2 ET CO2 Calibration
*Access and set upHyperTerminal:1-Start2-Settings3-Control Panel4-Add/Remove Programs5-Windows Setup6-Communications7-selectHyperTerminal8-APPLYSettings are:9600 Baud, 8 bit word, 1 stop bitno parity, no flow controlANSI character setFind HyperTerminal in Programs,Accessories
NOTE: The Scrubber lookssimilar to a watertrap, butis filled with white granules.It is included with model623XX.
NOTE:Replace water trapevery 6 hrs of use. Treatwater trap and usedNasalCO2 Sample linesas bio hazard material!
Section 2 - Service
8 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
2.3.2.4 Remove water trap from water trap socket .2.3.2.5 Message “Install scrubber ” will appear .2.3.2.6 Attach scrubber to water trap.2.3.2.7 Insert scrubber/water trap assembly into water
trap socket.Message “Enter span gas value using<Set> button ” will appear.
2.3.2.8 Change the default value (10%) to the value ofspan gas being used (calibrated 8% to 12%concentration known to ±0.01%).
2.3.2.9 Press <BP Start/Cancel>Message: “Sampling ” appears while theinstrument is sampling the scrubber air.
2.3.2.10 When instructed, remove the scrubber fromthe CO2 water trap. Do not remove water trap.
2.3.2.11 Attach the calibrated source of CO2 gasto the CO2 side-stream sampling tube as perFigure 2.3.2.11
2.3.2.12 Adjust the CO2 regulator just enough toallow a small amount of gas to flow out of thevent (approximately 3 PSI).
Important: Once positive flow isestablished, let the it flow for one minutebefore pressing the Continue button andactually sampling.After one minute, press the Continuebutton to let the Atlas start sampling CO 2. .
2.3.2.13 Press <BP Start/Cancel>Message: “CO2 calibration successful ” or“CO2 calibration failed ” will appear onthe CRT display.
(Note: Serial Communication is not the cause of a failureif the Prion Serial appears in the Service Screen.Therefore the problem is with the board or connectionsand not serial communication problems.)
2.3.2.14 Press Trend button to Exit.
To calibrate the CO2 system in years 2022 or later it isnecessary to reset the system clock to an earlier year,perform the calibration, and then set the clock to thecorrect year again. The service center should keep arecord of this since the Cal display in the Service Modescreen will be incorrect.
CO
2
watertrap
vent
Figure 2.3.2.11
Note : Adjust regulator toapproximately 2 PSI.
valve
NOTE:Replace water trapevery 6 hrs of use. Treatwater trap and usedNasalCO2 Sample linesas bio hazard material!
SR856: CO2 Calibrationbeyond the year 2021
Section 2 - Service
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 9
NOTE: There may be amessage indicating a 5minute Warming Up period.
2.3.3 CO2 RESETNeed: Watertrap and Scrubber
2.3.3.1 Press the Date/Time button on the lowerright of the monitor. The Set Date and Timeand Other Options menu will be displayed.
2.3.3.2 Select the Reset CO2 selection by pressingthe CO2/RESP ALARMS Off button.CO2 Reset screen will appear.
2.3.3.3 Follow the instructions on the screen.“Remove the CO2 watertrap”.“Install the CO2 Scrubber onto the CO2
watertrap.”
NOTE: The Scrubber looks similar to a watertrap,but is filled with white granules. It is includedwith model 623XX.
2.3.3.4 Remove the tubing from the watertrap andattach the Scrubber to the watertrap.
2.3.3.5 Insert the watertrap/Scrubber combinationinto the watertrap socket.
2.3.3.6 Messages: The system will report that it isSampling. The system will then report ResetComplete.
2.3.3.7 Remove the watertrap/Scrubber from thewatertrap socket.
2.3.3.8 Detach the Scrubber from the watertrap andreattach the tubing.
2.3.3.9 Replace the watertrap in the watertrap socket.2.3.3.10 Press Trend to return to the waveform
screen.
2.3.3 CO2 RESET
Section 2 - Service
10 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
2.3.4 PRINTER CALIBRATIONNeed:PC with HyperTerminalSerial cableConnector
2.3.4.1 Use HyperTerminal to get strobe widthsettings for printer normal for waveforms -text for trend
Advanced configuration printing:Pangea> nvram get
printer_strobe_width_normal<ENT>(normal value 130)
Pangea> nvram get printer_strobe_width_text <ENT>(normal value 70)
2.3.4.2 Change values - larger number for darkerprinting. Change with:
Pangea> nvram set printer_strobe_width_normal XXXPangea> nvram set printer_strobe_width_text YYY
2.3.4.3 Test and reset until satisfied.2.3.4.4 Press Trend button to exit the Service Mode.
2.3.5 BATTERY VOLTAGE CALIBRATION for models622XX and 623XX.
NOTE: CHECK BATTERY VOLTAGE CALIBRATIONAFTER REPLACING MAIN PCB.Need:DC power supply rated: 7 VDC at 5ABattery eliminator cable - Atlas battery plug on oneend, interface to the power supply on the other.There should be access for voltmeter probes atthe Atlas end of the cable when it is installedDMM / DVM with 10mV resolution on a 10V scalePC with HyperTerminalSerial cable and connector
2.3.5.1. Connect serial cable to PC and Atlas2.3.5.2 Remove battery from Atlas2.3.5.3 Set the power supply to 6.8V +/- 200mV2.3.5.4 Connect the power supply to the Atlas battery
connector.2.3.5.5 Turn Atlas ON.2.3.5.6 Reduce the power supply to 6.0V
2.3.5 BATTERY VOLTAGECALIBRATION
2.3.4PRINTER CALIBRATION
Note: Two lines are displayed:Waveform +128, Text +70These two numbers are factorydefaults and a good starting pointif the system is printing verypoorly or not at all.The LEFT<SET> button controlsthe Waveform setting, up anddown. The RIGHT <SET> but-ton controls the Text setting, upand down. Make changes tothesettings as needed, where alarger number = darker printingand a smaller number = lighterprinting. Make initial changes ofabout 10 points each time. Aftermaking an adjustment, press<TREND> to exit the ServiceMode.
Section 2 - Service
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 11
2.3.5.7 Measure the voltage at the battery connector(at the Atlas) to the nearest 10mV.
NOTE: Do not measure at the power supply, sincecable resistance will introduce error.
2.3.5.8 At the HyperTerminal, type:Pangea> power cal XXXX<ENTER>
(where XXXX represents the measured voltage inmillivolts no decimal point.) For example, if youmeasured 6.010V at the battery connector, use thecommand “power cal 6010<ENTER>”.
2.3.5.8 The Atlas will respond:raw = ZZZZ mV true = 6010 mV OK
(where ZZZZ is the raw uncalibrated reading that theinstrument made.)
2.3.5.9 Reduce the power supply to 5.6 volts. Youshould soon hear the “low battery” alarm.
2.3.5.10Measure the voltage at the battery connectorto the nearest 10mV.
2.3.5.11 At the HyperTerminal, type:Pangea> power cal XXXX<ENTER>
(where XXXX represents the measured voltage inmillivolts no decimal point.) For example, if youmeasured 5.590V at the battery connector, use thecommand “power cal 5590<ENTER>”.
2.3.5.12The Atlas will respond:raw = ZZZZ mV true = 5590 mV OK
(where ZZZZ is the raw uncalibrated reading that theinstrument made.)
2.3.5.13 Finish by typing: (this will re-boot ATLAS)Pangea> hw reset<ENTER>
2.3.5.14 Turn Atlas OFF and remove the powersupply.
2.3.5.15 Re-Install the battery.
Section 2 - Service
12 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
2.3.6 TEMPERATURE MEASUREMENTSUBSYSTEM CALIBRATION:
Need:PCSerial CableHyperTerminal 1kOhm - 2kOhm 1% 1/2watt resistorLarge RCA plug (1/4”) 2 conductorShort length of wire (optional)Soldering iron and solder
2.3.6.1Prepare Resistor/Plug assembly.Solder the resistor across RCA plugterminals.
2.3.6.2 Plug the resistor assembly into the AtlasTemperature jack.
2.3.6.3 Connect the Atlas to the PC serial port.2.3.6.4 Turn the Atlas ON.
NOTE: Temperature display will show a validtemperature.
2.3.6.5 Start HyperTerminal on the PC.2.3.6.6 At the Pangea prompt, type:
Pangea>temp cal xxxxxx<ENTER>
(where the xxxxxx is the value of the precision resistorin centiOhms- Specify the Ohms, tenths, andhundredths of Ohms with no decimal point- forexample, a 1200.00 Ohm resistor would be:Pangea>temp cal 120000<ENTER>
2.3.6.7 Wait four seconds then type:Pangea>temp state<ENTER>
2.3.6.8 Displayed resistance will be within 0.5Ohms of the value that you entered.The Offset should not exceed 5.0 Ohms.
NOTE: The system will silently fail (without error) if itis unable to calibrate properly. Therefore youmust manually verify that this resistance iscorrect.
2.3.6.9 Turn the Atlas OFF.2.3.6.10Unplug the resistor/plug assembly.2.3.6.11Remove the serial cable.2.3.6.12Check the accuracy of the
temperature sensing system using theprocess described in Section 2.2.11
2.3.6 TEMPERATUREMEASUREMENT
SUBSYSTEMCALIBRATION
Section 2 - Service
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 13
2.3.7 Set battery charging voltage:Specification :No Load: 6.85VDCNeed: DVMM2.3.7.1Remove battery from unit and unplug.2.3.7.2Use DVMM to check across right pin (+)
and left pin (-) when viewed looking intothe battery compartment.
2.3.7.3Adjust potentiometer R338 to obtain6.85VDC. (It is located at the right of thebattery jack.Turn it counterclockwise to increase thecharging voltage.
2.3.7 Set Battery ChargeVoltage
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Section 2 - Service
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 15
2.4 Downloading Operat-ing System
(when upgrading software orreplacing CPU board)
2.5 Downloading NVRAMText files
after replacing Main Board
*Configure HyperTerminal9600 Baud8 bits1 stop bitno parityno flow control
2.4 Downloading Operating SystemWhen required: to load latest revision software*
on a fully functioning Atlas or to reload softwareafter replacing the MCU board. Theatlas_dl.exe program loads the following files:
atlas.out.gznvram_common.txtnvram_(model#).txt **nvram_(language).txt **
Equipment or supplies required:PC with Windows ‘95/NTSerial cable with connector: (COM1to PC)File : atlas_dl.exe
2.4.1 Connect serial cable between Atlas andPC COM1
2.4.2 Double click “atlas_dl.exe” explorer window2.4.3 After downloading is complete, check alarm
and other User controlled advancedconfiguration settings since these are ‘reset’ bythis downloading process.
Downloading Operating System complete
2.5 Downloading NVRAM files with Hyperterminal*.The NVRAM resides on Main Board. Hyperterminal loads the following files:
cal_init.txtcommon.txt(model#).txt **(language).txt,**printer.txt (if required),or no_printer.txt.
2.5.1Connect serial cable between Atlas andPC COM1 as in 2.4 above.
2.5.2Open HyperTerminal program on PC:STARTPROGRAMSACCESSORIESHYPERTERMINAL
2.5.3Turn Atlas ON. You should see someversion information and a prompt:
Pangea>2.5.4 Transfer Text files:
(TRANSFER/SEND TEXT FILE)NVRAM_CAL_INIT.TXT (only if main board has beenreplaced)
Note: If Atlas calibrationwas satisfactory prior todownloading softwarethen recalibration is notrequired.
**Note: Hyperterminalqueries the Atlas to deter-mine which model numberand language to down-load.
Section 2 - Service
16 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
2.6 Downloading Soft-ware &
NVRAM Text filesafter replacing Main Board
AND CPU board
2.5 Downloading NVRAMText files
when replacing Main Boardcontinued
NVRAM_COMMON.TXTNVRAM_NO_PRINTER.TXT
orNVRAM_PRINTER.TXTNVRAM_(model 200,210,220).TXTNVRAM_<LANGUAGE>.TXT
2.5.5 After these text files are transferred,Type the following serial commands to updatethe serial number:
nvram set serial___ (last 3 digits of serial#)nvram writehw reset (hardware reset restarts Atlas and
saves the new settings)2.5.6 Verify the serial number correct2.5.7 Recalibrate Atlas unit. After calibration is
complete.2.5.8 Check alarm settings and User selected
advanced Configurations
2.6 Downloading Software & NVRAM Text files2.6.1 Use atlas_dl.exe as in step 2.4. to Program
new CPU board.2.6.2 Use HyperTerminal as in step 2.5 to set
NVRAM on new Main Board.2.6.3 Recalibrate Atlas2.6.4 Check alarm settings and User selected
advanced Configurations
NOTE: Firmware DownloadSoftware versions of OEM boards are not fieldupgradeable. (SpO
2 boards or the CO
2 board.)
Replace the subsystem board with a higher(current) version if necessary.
WELCH ALLYN ATLAS MONITOR 17SERVICE MANUAL 6200-43E REV. A
Section 2 - Service
2.7 Product Model Number Structure
621S0* ECG, Nonin SpO2, NIBP
621SP* ECG, Nonin SpO2, NIBP, Printer
622S0** ECG, Nonin SpO2, NIBP, Temp, Respiration, Battery, RS232, Nurse Call
622SP** ECG, Nonin SpO2, NIBP, Temp, Respiration, Battery, RS232, Printer, Nurse Call
622N0** ECG, Nellcor SpO2, NIBP, Temp, Respiration, Battery, RS232, Nurse Call
622NP** ECG, Nellcor SpO2, NIBP, Temp, Respiration, Battery, RS232, Printer, Nurse Call
623SP** ECG, Nonin SpO2, NIBP, ETCO
2, Temp, Respiration, Battery, RS232, Printer, Nurse Call
623NP** ECG, Nellcor SpO2, NIBP, ETCO
2, Temp, Respiration, Battery, RS232, Printer, Nurse Call
SUFFIX:
Use letter designation for language localization as follows:
E = English, F= French, G= German, I= Italian, S= Spanish, P= Portuguese C = Chinese, J= Japanese
Use number designation for line cord localization as follows:
1 = US, Canada, Japan Version
2 = European Version
4 = United Kingdom Version
6 = Australian Version
Specifications: See Operator ManualSpecifications for all of the above listed models of Atlas including performance, accuracy,range, size, weight, power, environmental, are documented in an appendix to the UserManual.
* Model 200 Main Board and Schematic 200** Model 220 Main Board and Schematic 220
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 1
1. Review customer complaint and determine if it issafe to plug in and turn on Atlas
2. Plug in Atlas, no sensors attached.3. Check for AC~ LED lit.4. Install paper in printer if fitted.
5. Turn on power6. Green light in power button.7. Loud beep when button pressed.8. Three dashes in SYSTOLIC.9. Three dashes in DIASTOLIC.10.Two dashes in SpO
2 (takes several seconds after BP
dashes come on).11. Three dashes in PULSE (takes several seconds after
BP dashes come on).12.Pleth: none, or a single bar at the bottom, or two bars at
the bottom.13.No lights in TEMP.14.No lights in ALARMS OFF buttons.15.X lit on AUTO.16.AC~ lit17.CRT display comes on slowly if cold, quickly if still warm
from last use.18.May see version string in center if comes on quickly, not
a problem if not seen because it comes on slowly.19.CRT: three dashes for Heart Rate20.Heart picture21.Lead select symbol22.Scale bar23.One or two lines of dashes for waveforms – depends
upon settings.24.Three dashes for MAP – or blank, depends upon
settings.25.Error message(s) at bottom of screen?
26. If 622 or 623, pull AC cable. Should be no changeexcept AC~ unlit.26.1. If errors of low, very low or depleted battery,
or if system dies, plug back in and repeattest in 2 hours.
3.1 Functional Test and Initial Diagnostic
Note: “Idle” screen is normalwaveform display.
Section 3 - Troubleshooting
2 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
Plug AC back in.
27.Press <DATE/TIME><TREND>28.Get Advanced Configuration menu.29.Write down all settings for resetting to customer prefer-
ence later.30.Set language to your native tongue if necessary to
allow you to write down the other settings . The topitem is always the language, press either <SET> buttonto step through list.
31.Press <PRINT> if printer fitted.32.Press <TREND> to return to idle screen.
33.Press <DATE/TIME>34.Get date/time menu.35.Verify date/time, set if necessary.
35.1. Bad date may indicate battery problem. Ifdate was bad, turn off unit, pull power cable,wait 5 minutes reconnect power cable, turnon unit. Check date again.
35.1.1. If date comes back bad: Replacemain board Model 200. Model 210,220, if battery not dead replace mainboard.
Press Date/Time to return to waveform screen if needed.
36.Press <DATE/TIME><LEAD SELECT>37.Get Service Mode menu.38.Examine version/configuration data in lower half of
menu, and write it all down.39.Press <SELECT> to highlight Reset to factory de-
faults.40.Press <BP START/CANCEL> to reset configuration.41.Press <TREND> to return to idle screen.42.Press <DATE/TIME><TREND>43.Get Advanced Configuration menu.44.Set language to your native tongue if necessary
44.1. We have just reset to factory defaults .Compare settings to factory defaults appropri-ate for the country – in Operator manual. If notmatching, indicates memory problems.Changing only the language should not changeany of the other factory default settings.
45.Press <DATE/TIME><LEAD SELECT>
MENU TESTS
3.1 Functional Test and Initial Diagnostic
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 3
46.Get Service Mode menu.47.Press <Select> to highlight CRT test pattern.48.Press <BP START/CANCEL> to show test pattern.
Examine display.49.Press any key to end display.
50.Press <Select> to highlight Printer test pattern (iffitted).
51.Press <BP START/CANCEL> to start test pattern.52.Printer should print test pattern.53.Press any key to end display.54.Examine printout.
55.Press <Select> to highlight LED test .56.Press <AUTO> to turn on all LEDs .57.Press <BP START/CANCEL> to show automatic test
pattern.58.Watch for a while, look for glitches in pattern.59.Press <Set> to go to manual mode and step through
individual segments if needed to observe a problem.
60.Press <Select> to highlight Button test.61.Press <BP START/CANCEL> to start test.62.Press every button on system, <BP START/CANCEL>
last.62.1. Verify that buttons match up with their names,
and that all buttons are functional.62.1.1. If names don’t match, indicates
memory corruption: Replace mainboard
63.Press <Select> to highlight Display A/D channels(three or four screens worth)63.1. Write down all values for later review.63.2. Press <Set> and write down all values for
each screen.64.Press <Trend> to return to Idle screen.
65.Connect the BP port to the BP simulator.66.Set the simulator for a normal reading (140/80,
100BPM, NSR).67.Press <BP START/CANCEL>
67.1. System should start pump, display manom-eter value in SYSTOLIC LED; this valueshould track and be very close to pressure
BP test
3.1 Functional Test and Initial Diagnostic
Section 3 - Troubleshooting
4 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
displayed by manometer in BP simulator (iffitted). Largest number shown in SYSTOLICshould be very close to the Initial pressuresetting recorded above from AdvancedConfiguration.
67.2. System should step down pressure, showingstep values in SYSTOLIC LED, and then dis-play correct SYSTOLIC and DIASTOLICvalues. System may show MAP value de-pending upon country.
68.Press <DATE/TIME><TREND> to get to AdvancedConfiguration menu.
69.Press <Select> to highlight Initial pressure.70.Press <Set> to change Initial pressure to 280 mmHg.71.Press <Select> to highlight MAP.72.Press <Set> to change MAP to Yes.73.Press <TREND> to return to idle screen.
74.Press <BP START/CANCEL>75.System should start pump, display manometer value in
SYSTOLIC LED; this value should track and be veryclose to pressure displayed by manometer in BPsimulator (if fitted). Largest number shown in SYS-TOLIC should be very close to the Initial pressuresetting of 280 mmHg.75.1. If pressure shown exceeds 300 mmHg:
Recalibrate BP
76.System should step down pressure, showing stepvalues in SYSTOLIC LED, and then display correctSYSTOLIC and DIASTOLIC values. System shouldshow MAP value. MAP value should match what isshown by simulator.
77.Set simulator to highest Systolic <=250, lowest Dias-tolic >= 30, and lowest heart rate >=30.
78.Press <AUTO>79.X goes unlit, 1 flashes for 10 seconds.80.20 seconds after 1 stops flashing, BP measurement
starts.81.BP reading as above.
81.1. If BP does not start: Replace main board81.2. If BP measurement incorrect recalibrate
3.1 Functional Test and Initial Diagnostic
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 5
82.No less than 30 seconds after completing the measure-ment another measurement should start. While it ispumping up, press <BP START/CANCEL>. Measure-ment stops immediately and pressure is dumped (asseen on manometer on simulator).82.1. If measurement does not stop immediately:
Main board or button.82.2. If pressure does not drop below 10mmHg
immediately: Main board
83.Press <AUTO> and X lights up (not flashing).
84.Disconnect the tubing from the BP port on the Atlas.85.Press <BP START/CANCEL> and note the time (to the
second).86.The BP should abort with an alarm after no longer than
one minute.
87.Cycle power on Atlas, connect a 5 lead cable set to thesimulator.
88.Configure the simulator for NSR 100BPM and Imped-ance Respiration.
89.Plug the cable into Atlas.90.Press <DATE/TIME> <TREND> to access Advanced
Configuration menu.91.Press <Select> to highlight ECG lead set and press
<Set> to select 5 wire.92.Set ECG gain to Automatic.93.Set ECG speed to 25mm/s.94.Set ECG bandwidth to Monitor.95.Set Second trace selection to ECG.Press <TREND> to return to idle screenShould see:
95.1. ECG cascading onto second line95.2. Scale bar on left of top line95.3. Heart rate displayed as set on simulator95.4. Lead Selected = II95.5. Pulse tone high pitched
Press <LEAD SELECT> and step through each of the leadsettings.Should see:
95.6. Different looking ECG waveforms95.7. Heart Rate will go to dashes and alarms on
some leads96.Set lead selected to II
ECG
3.1 Functional Test and Initial Diagnostic
Note: Simulator must sup-port impedance respirator.
Section 3 - Troubleshooting
6 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
97.Press <DATE/TIME><TREND> to access AdvancedConfiguration menu.
98.Change Second trace selection to Respiration.99.Press <TREND> to return to idle screen.100. Should see:
100.1. ECG on top line100.2. Scale bar on left of top line100.3. Heart rate displayed as set on simulator100.4. Lead Selected = II100.5. Pulse tone high pitched100.6. Respiration trace on second line100.7. Respiration rate displayed as set on simula-
tor.101. Disconnect ECG simulator
102. Connect SpO2 cable and cuff and install cuff on
simulator (or your finger).103. Set simulator to normal readings.104. See pleth signals immediately.105. See SpO
2 percentage within several seconds .
106. See Pulse display at the same time as SpO2
percentage.
107. Disconnect SpO2 cuff from simulator.
108. See error “SpO2 cuff not detected”.
109. Unplug SpO2 cable from Atlas.
110. See error “SpO2 cable not detected”.
111. Temp display is blank.112. Connect temp probe.113. See temp display of ambient temperature.
114. Disconnect temp probe.115. Temp display becomes dashes. No alarm or error
116. Press <DATE/TIME><TREND>117. Get Advanced Configuration menu.118. Set Second trace selection to CO2.119. Press <TREND> to return to idle screen.120. Insert watertrap with tubing attached.121. Should see:
121.1. Hear pump motor start.121.2. See solid line waveform on lower trace.121.3. See dashes in Respiration Rate.121.4. See dashes in mmHg (or % or kPa, as
configured).
SpO2
Temp
CO2
3.1 Functional Test and Initial Diagnostic
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 7
122. Breathe gently and repeatedly over end of tubing123. Should see:
123.1. See waveform within seconds of breathing123.2. See respiration rate non zero within one
minute.123.3. See CO2 concentration non zero within one
minute.
124. System must have been plugged in for 24 hours fora real battery test to guarantee that battery is fullycharged, but for functional test we can try it:
125. Press <DATE/TIME><LEAD SELECT>126. Get Service Mode menu127. Press <SELECT> to highlight Battery test128. The menu reports
Battery Low Time XXX andBattery Dead Time YYY
These are the results from the last battery test. TheBattery Low Time is the time in hours and minutesthat the battery ran in the last test until the LowBattery alarm started, and the Battery Dead Time isthe time from the beginning of the Low Battery Alarmuntil the system turned itself off when the batteryvoltage reached the cutoff level.
129. Write down the Battery Low Time and Battery DeadTime
130. Unplug AC cord to start battery test131. The timers will begin. Leave the system until it
powers down. Plug in AC and turn the system on,enter the Service Mode menu, select Battery Testagain, and write down the new values. Comparethese to the previous values, and to the minimumspecification: Battery Low Time = 1 Hour Battery Dead Time = 10 Minute minimums.
132. Replace the battery if performance falls belowspecification
NOTE: Configuration settings for printing are different fortext pages (Advanced Configuration and Trend displays)and for waveforms.
133. Connect ECG simulator to generate a samplewaveform.
BATTERY
PRINTER
3.1 Functional Test and Initial Diagnostic
Note: 2:08 means 128minutes which is the defaultsetting indicating a batterytest has never been madebefore.
Section 3 - Troubleshooting
8 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
134. Press <PRINT> and look at waveform printout. Lookfor darkness, thickness of lines, legibility of text,blurring, “blooming” of text.
135. Press <DATE/TIME><TREND>136. Get Advanced Configuration menu.137. Press <PRINT> and look at text printout.
137.1. If feeding problems: Mechanical inspectionof printer, replace motor, drive platten.
137.2. If waveforms too light or dark: Calibrate137.3. If text too light or dark in configuration screen,
press <Select> until “Printer test pattern” ishighlighted then press <HR Alarms Off>button, then press <Set> to lighten or darkenprint.
137.4. If incorrect printout, missing elements, missing grid, etc: Troubleshoot further
Software/firmware
138. Review versions written down earlier and compareto latest available, and also make sure that allcomponents are compatible with each other. Seetable 2.6 in this document.
Power-on beep139. Turn off system, and turn on. Should hear loud
Power-on beep.
ECG pulse tone, pulse volume control, saving set-tings, <HR ALARMS Off> button140. Connect ECG simulator.141. Should hear: heart rate beep, at constant high pitch142. Press SpO
2 volume button “-“ 8 times. Should get
quieter and finally silent.
143. Press <DATE/TIME><PRINT> to Save settings .144. Turn system off and back on.145. Pulse tone should be silent even though heart rate is
shown.
146. Press SpO2 volume button “+” 8 times. Should get
audible and then louder.
147. Disconnect ECG cable
ALARMS/SOUNDS
3.1 Functional Test and Initial Diagnostic
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 9
148. Should hear Technical alarm and see error message.149. Press <HR ALARMS Off> button.150. Should stop Technical alarm sound, and erase error
message, and light LED in <HR ALARMS OFF>button.
151. Press <HR ALARMS OFF> button again.152. Should hear Technical alarm sound, see error
message, LED unlit in <HR ALARMS Off> button.153. Turn system off and on.
SpO2 pulse tone154. Attach SpO2 cable and cuff, and attach to simulator
or finger.155. Should hear heart rate beep, different tone than
when ECG was connected.156. Change SpO2 setting on simulator, or hyperventilating,
hold breath, should hear tone pitch change up or downtracking simulator setting.
Limit Alarm, alarm volume control, Silence button,Technical Alarm, <SpO 2 ALARMS Off> button157. Press right <Select> button until SpO2 LO is flash-
ing, press right <Set> UP to change SpO2 LOsetting to 99.
158. Wait until SpO2 LO stops flashing.159. Set simulator to SpO2 at 90%.160. Should hear Limit alarm.
161. Press <Alarm Volume> “-“ eight times. Should getquieter but not silent.
162. Press <Alarm Volume> “+“ eight times. Should getlouder.
163. Press <Silence> and start stopwatch. Should bequiet for the time set in Advanced Configurationmenu, then alarm comes back on.
164. Disconnect SpO2 cable from Atlas.165. Should hear technical alarm, see error message
“SpO2 cable not detected”166. Press <SpO2 ALARMS Off> button.167. Should stop Technical alarm sound, and erase error
message, and light LED in <SpO2 ALARMS OFF>button.
168. Press <SpO2 ALARMS OFF> button again169. Should hear Technical alarm sound, see error mes-
sage, LED unlit in <SPO2 ALARMS Off> button.170. Turn system off and back on.
3.1 Functional Test and Initial Diagnostic
Section 3 - Troubleshooting
10 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
<CO2/RESP ALARMS Off> button171. Press <DATE/TIME><TREND>172. Get Advanced Configuration menu173. Set Second trace selection to CO2174. Press <TREND> to return to idle screen175. Insert CO2 watertrap with hose176. Breath into hose until waveform is displayed177. Remove CO2 watertrap178. Should hear Technical alarm and see error mes-
sage. - “CO2 watertrap not detected”179. Press <CO2/RESP ALARMS Off> button.180. Should stop Technical alarm sound, and erase error
message, and light LED in <CO2/RESP ALARMSOFF> button.
181. Press <CO2/RESP ALARMS OFF> button again.182. Should hear Technical alarm sound, see error
message, LED unlit in <CO2/RESP ALARMS Off>button.
183. Turn system off and back on
<BP ALARMS Off> button184. With no hose connected to BP port, press <BP
START/CANCEL> button185. Place finger over BP port, blocking flow, causing BP
to detect overpressure and abort186. Should hear Technical alarm and see error mes-
sage. - “Check blood pressure cuff”*187. Press <BP ALARMS Off> button.188. Should stop Technical alarm sound, and erase error
message, and light LED in <BP ALARMS OFF>button.
189. Press <BP ALARMS OFF> button again.190. Should hear Technical alarm sound, see error
message*, LED unlit in <BP ALARMS Off> button.191. Turn system off and back on.
Battery tone192. Disconnect AC power on running system.193. Connect BP hose to simulator194. Press <AUTO> to select 1 minute intervals195. Wait for battery to run down. With fully charged
battery, after no less than 50 minutes, should hearsingle tone, get message that system will shut downin 10 minutes.
3.1 Functional Test and Initial Diagnostic
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 11
SELF DIAGNOSTICERROR MESSAGES
3.1 Functional Test and Initial Diagnostic
196. Should hear tone again in two minutes, and againtwo minutes after that.
197. Five minutes after first message, should start hear-ing tone every minute, and get message that 5minutes remain until shutdown.
198. Ten minutes after first message, should hear techni-cal alarm, see a printout of Trend data if there is anyunprinted trend data accumulated, (which there is,we have been running BP measurements) and errormessage that system shutdown is imminent.
All the possible error messages are documented in anappendix to the Operator’s Manual.
Complaint Cause Corrective Action
Power
Will not power up in AC No wall powerWrong wall power voltage/frequencyFuse in power supplyFuse in neutral wirePower supply failure
LEDs
Random LSD segments unlit Failed LED LED 1Subsystem LEDs unlit Subsystem problem Check subsystem LED 1LED intermittent, dim, flickering Failed LED Replace Display board
Buttons
Button not functional Failed switch Button 1Failed subsystem Check subsystem
Button sticking under front bezel Possible loose display board Tight display board mounting screws.Button intermittent or difficult to Failed switch Button 1make contact
sounds
No sound at all Failed speaker or disconnectedFailed main boardSoftware corruption
Reload softwaresound 1
Battery
Insufficient life
Printer
Feed problems
Waveform print qualityText print qualityNot functional
Feeding but not printing
Failing battery Battery 1
Paper inserted incorrectlyDoor not latchedFailed printerSoftware adjustment neededSoftware adjustment neededFailed printerPrinter cablePaper inserted backwardsWrong kind of paperFailed printer
Printer 1
Printer 1Printer 1Printer 1
Printer 1
CRT
CRT is blank CRT cables
Failed CRTFailed Deflection boardFailed Main Board
CRT 1Reinstall software
Section 3 -Troubleshooting 3.2 Chief Complaint, Cause and Corrective Action
12 WELCH ALLYN ATLAS MONITOR Service Manual 6200-43E Rev. A
Section 3 -Troubleshooting 3.2 Chief Complaint, Cause and Corrective Action
ECG
Complaint Cause Corrective Action
ECG waveform not displayed(dashed lines)
Patient electrodes
Lead wiresCableECG cable connectionFailed main board
ECG 1
ECG waveform not properly scaled Possible patient physiology problem Check gain settingReinstall software
ECG gain set to 10mm/mV in ECG 1Advanced Configuration
ECG waveform not cascading Incorrect Advanced Cofigurationsetting
Change Advanced Configuration setting to:Second trace source = ECG; ECG gain =automatic
Heart rate not detected Patient electrodes ECG 1Lead wiresCableECG cable connectionFailed main boardPossible patient physiology problemPatient with Pacemaker?
Heart rate disagrees with Pulse rate Possible patient physiology problem Repeat on another patientPatient with Pacemaker? ECG 1
SPO2 1Compare manual palpationReinstall software
Heart rate disagrees with manualpalpation
Possible patient physiology problem Does patient have abnormal ECG?Repeat on another patientECG 1
SPO2
Sp02 displays not active Incorrect brand sensorFailes Sp02 boardFailes Sp02 sensor
SPO2 1
Sp02 displays inaccurate
Impedance Respiration
Possible patient physiology problem Sp02 1
IR waveform not displayed (dashes) Possible patient physiology problem ECG 1Poor signal LA/RA placement Use modified electrode placement on chest
walls
Service Manual 6200-43E Rev. A WELCH ALLYN ATLAS MONITOR 13
Section 3 -Troubleshooting 3.2 Chief Complaint, Cause and Corrective Action
BP
Complaint Cause Corrective Action
BP measurements inaccurate
BP not working
Auto not working
Cuff pressure too high
Cuff Pressure too low
Cannot take reading in time
Incorrect cuff size Try different cuff - refer to Operator Manual forIncorrect cuff placement sizing information and proper cuff placement.Possible patient physiology problemCalibration needed CalibratePressure leak BP1
BP1
BP1, Button 1
BP1, Calibrate
BP1, Calibrate
Incorrect cuff size Try different cuff - refer to Operator Manual forIncorrect cuff placement sizing information and proper cuff placement.Patient movementPossible patient physiology problemCalibration needed CalibratePressure leak BP1
Cannot achieve target pressure Calibration needed CalibrateInitial pressure set too low for patient BP1physiology
Hold pressure too long Software problemValve problem
BP1Reload SoftwareReplace main board
Dumps pressure while inflating Software problem BP1Valve problem Reload SoftwareHardware sensor problem Replace main board
TEMP
Readings inaccurate Incorrect probe placement See Probe insert materialPossible patient physiology problemPoor physical contact with patient Use gel, adhesive tape to improve contactExcess aiflow, sunlight on probe Protect probe from light, airflowFailed probe Temp 1
Cannot read -wrong language Language set wrong Top entry is always language. Step throughchoices with <SET> button while top item ishightlighted
Nurse Call
Does not workIntermittent signal
Brief signals
Relay failure Connect Ohmmeter across pins 1 and 8.Cable Expect infinity. Force an alarm state andCable connection expect 0 Ohms.
Battery tone errors Connect ACBattery warnings will signal NurseCall for only a second , every minuteor two
14 WELCH ALLYN ATLAS MONITOR Service Manual 6200-43E Rev. A
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 15
Remove all instrument cables and hosesInstall printer paper if printer is fitted
Review customer complaint and determine if it is safeto plug in and turn on Atlas
If not safe to power up: smoke/flames/smell reported?
Goto Power 1
Check power available lightGoto Power 2
Check power-up stateGoto Power 3
Set language and Preserve customer settingsGoto Test Setup 1
Check date/timeGoto Test Setup 2
Reset to factory defaultsGoto Test Setup 3
Check software/firmwareGoto Test Setup 4
Check CRT Alignment TestGoto CRT 1
Check Button TestGoto Button 1
Check Display A/D ChannelsGoto A/D 1
Check LED testGoto LED 1
Check Printer alignment testGoto Printer 1
Check Printer functionGoto Printer 2
3.3 TOP LEVEL TROUBLESHOOTING INDEX
Section 3 - Troubleshooting
16 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
Check BatteryGoto Battery 1
Check Alarms/SoundsGoto Sound 1
Check BPGoto BP 1
Check ECGGoto ECG 1
Check SPO2Goto SPO2 1
Check TempGoto Temp 1
Check CO2Goto CO2 1
3.3 TOP LEVEL TROUBLESHOOTING INDEX
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 17
Disassemble and inspect power supply, wiresCheck fuse in power supplyCheck fuse in neutral wire to power supplyTest power supply on benchCheck fuse in battery cable
If AC~ not lit, check power cord continuity, outlet poweravailableCheck connection at appliance inletGoto Power 1
Turn on powerGreen light in power button
If not lit, goto LED 1
Loud beep when button pressedIf not heard, goto Sound 1
Fan running (622xx and 623xx)If not running, goto Fan 1
Three dashes in SYSTOLICThree dashes in DIASTOLIC
If not seen, goto LED 1If passed, goto BP 1
Two dashes in SPO2 (takes several seconds after BPdashes come on)Three dashes in PULSE (takes several seconds after BPdashes come on)Pleth: none, or a single bar at the bottom, or two bars at thebottom
If not seen, goto LED1If passed, goto SPO2 1
No lights in TEMP (622xx and 623xx)If any are lit, goto Bad Boot 1
No lights in ALARMS OFF buttonsIf any are lit, goto Bad Boot 1
3.4 Diagnostic Tests
Power 1
Power 2
Power 3
Section 3 - Troubleshooting
18 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
X lit on AUTOIf not lit, or a number lit, goto Bad Boot 1
AC~ litIf not lit, goto LED 1
CRT display comes on slowly if cold, quickly if still warmfrom last use.May see version string in center if comes on quickly, not aproblem if not seen because it comes on slowlyCRT: three dashes for Heart RateHeart pictureLead select symbolScale barOne or two lines of dashes for waveforms – depends uponsettingsThree dashes for MAP – or blank, depends upon settings.
If not seen goto CRT 2
Error message(s) at bottom of screen?If message, review cause in User Guide
If 622xx or 623xx, pull AC cable. Should be no changeexcept AC~ unlit.
If system dies immediately, check fuse on batterycable
If fuse is OK, either charge battery for 2+hours or goto Battery 1
If errors of low, very low or depleted battery, plugback in and repeat test in 2 hours
Press <DATE/TIME><TREND>Get Advanced Configuration menuSet language to your native tongue if necessary toallow you to write down the other settings . The topitem is always the language, press either <SET> button tostep through list.Write down all settings for resetting to customer preferencelaterPress <PRINT> if printer fitted
If printer problems, goto Printer 1Press <TREND> to return to idle screen
Test Setup 1
3.4 Diagnostic Tests
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 19
Press <DATE/TIME>Get date/time menuVerify date/time, set if necessary.
If date was significantly wrong, goto Date 1Press <TREND> to return to idle screen
Press <DATE/TIME><LEAD SELECT>Get Service Mode menuExamine version/configuration data in lower half of menu,and write it all downPress <SELECT> to highlight Reset to factory defaultsPress <BP START/CANCEL> to reset configurationPress <TREND> to return to idle screenPress <DATE/TIME><TREND>Get Advanced Configuration menuSet language to your native tongue if necessaryWe have just reset to factory defaults . Compare settingsto factory defaults appropriate for the country – in Operatormanual if not here too.
If not matching, goto NVRAM 1Press <TREND> to return to idle screen
Compare version numbers from Test Setup 3 to table inService Guide
Press <DATE/TIME><LEAD SELECT>Get Service Mode menuPress <SELECT> to highlight CRT Test patternNote screen alignment
If misaligned, mechanical adjustment required ondisassembled unitPress <TREND> to return to idle screen
If no display at all on CRT:Check connections:
CRT to Yoke cableCRT to Anode cableCRT to Deflection boardDeflection board to Main board cable
Replace CRTReplace Deflection boardReplace Main board
Test Setup 2
Test Setup 3
Test Setup 4
CRT 1
CRT 2
3.4 Diagnostic Tests
Section 3 - Troubleshooting
20 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
If distorted display on CRT:Check connections:
CRT to Yoke cableCRT to Anode cableCRT to Deflection boardDeflection board to Main board cable
Replace Deflection boardReplace CRT
If good display but some items are distorted or missingfrom CRT display:
If ECG waveform, heart rate, lead selected, heartsymbol missing:
Replace Main board
Press <DATE/TIME><LEAD SELECT>Get Service Mode menuPress <Select> to highlight Button testPress <BP START/CANCEL> to start testPress every button on system, <BP START/CANCEL> lastVerify that buttons match up with their names, and that allbuttons are functional.
If a button does not report its name, goto Button 2If a button reports the WRONG name, goto NVRAM
1Press <Trend> to return to Idle screen
If a single button does not report its name: Replace Dis-play boardIf multiple or all buttons do not report their names:
Check Display board to main board cableReplace Display boardRe-install softwareReplace CPU boardReplace Main board
Button 1
Button 2
3.4 Diagnostic Tests
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 21
Press <DATE/TIME><LEAD SELECT>Get Service Mode menuPress <Select> to highlight Display A/D channels (threeor four screens worth)Write down all values for later reviewNeed to provide tables of reasonable values, trouble-shooting pointersPress <Set> and write down all values for each screen
If data missing, corrupt or questionable, gotoNVRAM 1 or Replace Display Board?
Press <Trend> to return to Idle screen
Press <DATE/TIME><LEAD SELECT>Get Service Mode menuPress <Select> to highlight LED testPress <AUTO> to turn on all LEDsPress <BP START/CANCEL> to show automatic testpatternWatch for a while, look for glitches in patternPress <Set> to go to manual mode and step throughindividual segments if needed to observe a problem
If any failed LEDs, multiple segments lighting atonce, or other problems: Replace Display Board
Press <Trend> to return to Idle screen
Press <DATE/TIME><LEAD SELECT>Get Service Mode menuPress <Select> to highlight Printer test pattern (if fitted)Press <BP START/CANCEL> to start test patternPrinter should print test patternPress any key to end printingExamine printout
If too dark/too light Goto Printer Settings 1 andPrinter Settings 2
If alignment errors: Adjust printer mechanismIf feeding problems: Adjust printer mechanism,replace feed rollerIf missing sections/rows of printout: Replace PrinterHardwareIf darkness not consistent across page: ReplacePrinter Hardware
A/D 1
LED 1
Printer 1
3.4 Diagnostic Tests
Section 3 - Troubleshooting
22 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
NOTE: Configuration settings for printing are different fortext pages (Advanced Configuration and Trend displays)and for waveforms.
Connect ECG simulator to generate a sample waveformPress <PRINT> and look at waveform printout. Look fordarkness, thickness of lines, legibility of text, blurring,“blooming” of text
Press <DATE/TIME><TREND>Get Advanced Configuration menuPress <PRINT> and look at text printout.
If waveforms too light or dark: goto Printer Settings1:If text too light or dark: goto Printer Settings 2If alignment errors: Adjust printer mechanismIf feeding problems: Adjust printer mechanism,replace feed rollerIf incorrect printout, missing elements, missing grid,etc
Connect serial cable between Atlas and PCStart HyperTerminal on PCAt Pangea> prompt, type:Pangea> nvram getprinter_strobe_width_normal<ENTER>Write down this valueIf problem is that WAVEFORM printout is too light, increasethis number. If the WAVEFORM printout is too dark, de-crease this number.Range is 0-256. Set new value with:Pangea> nvram set printer_strobe_width_normalXXX<ENTER>Pangea> nvram write<ENTER>Where XXX is the new value.Repeat the test that showed the problem.Repeat this test-and-set process until ideal value isachievedDisconnect serial cable
Printer 2
Printer Settings 1
3.4 Diagnostic Tests
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 23
Connect serial cable between Atlas and PCStart HyperTerminal on PCAt Pangea> prompt, type:Pangea> nvram get printer_strobe_width_text<ENTER>Write down this valueIf problem is that TEXT printout is too light, increase thisnumber. If the TEXT printout is too dark, decrease this num-ber.Range is 0-256. Set new value with:Pangea> nvram set printer_strobe_width_textXXX<ENTER>Pangea> nvram write<ENTER>Where XXX is the new value.Repeat the test that showed the problem.Repeat this test-and-set process until ideal value is achievedDisconnect serial cable
A bad date may indicate a battery problem. If date was bad,turn off unit, pull power cable, reconnect power cable, turn onunit. Check date again.
If date comes back bad:Model 621xx: test/replace lithium on-board batteryModel 622xx/623xx: charge/test batteryIf battery OK/Charged/Replaced repeat Test Setup 2
If still not maintaining date goto NVRAM 2
Failure to correctly reset factory defaults indicates memoryproblems. Changing only the language should not changeany of the other factory default settings.Reinstall software and repeat test.
If still failingReplace CPU board
Date comes back wrong and battery already tested goodReinstall software and repeat test
If still failingReplace CPU board
Save Settings does not workReinstall software and repeat test
If still failingReplace CPU board
Printer Settings 2
Date 1
NVRAM 1
NVRAM 2
NVRAM 2
3.4 Diagnostic Tests
Section 3 - Troubleshooting
24 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
System must have been plugged in for 24 hours for a realbattery test to guarantee that battery is fully charged.Press <BP Start/Cancel> to start a BP measurement;press <BP Start/Cancel> again after three seconds toabort the measurement – this puts an entry into the Trendlist.Press <DATE/TIME><LEAD SELECT>Get Service Mode menuPress <SELECT> to highlight Battery testThe menu reports:
Battery Low Time XXX andBattery Dead Time YYY
These are the results from the last battery test. The BatteryLow Time is the time in hours and minutes that the batteryran in the last test until the Low Battery alarm started, andthe Battery Dead Time is the time from the beginning of theLow Battery Alarm until the system turned itself off when thebattery voltage reached the cutoff level.Write down the Battery Low Time and Battery Dead Time.Note that the value 2:08 is the default (128 minutes) andindicates that no test has been run before.Unplug AC cord to start battery test.The timers will begin.Leave the system until it powers down.One minute before power down, the system should print aTrend printout (if equipped with printer)
If Trend printout does not occur:When system powers off, plug in AC and turn the systemon.Press <DATE/TIME><LEAD SELECT>Get Service Mode menuPress <SELECT> to highlight Battery testThe menu reports:
Low Time XXX andDead Time YYY
write down the new values. Compare these to the previousvalues, and to the minimum specification: Low Time >= 60minutes; Dead Time >= 10 minutesIf either number is below specification, replace the battery
Power-on beepTurn off system, and turn on. Should hear loud Power-onbeep.
If beep not heard: Continue with this test. If no othersounds are heard, Replace Speaker Hardware.
Battery 1
Sound 1
3.4 Diagnostic Tests
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 25
ECG pulse tone, pulse volume control, saving set-tings, <HR ALARMS Off> buttonConnect ECG simulator with a normal ECG setting.Should hear: heart rate beep, at constant high pitch.
If heart rate beep not heard, press SPO2 volumebutton “+” three timesIf heart rate beep still not heard:
If power-on beep was heard, isolate toCPU/main board. Could also be displayboard with a bad button.
Press SPO2 volume button “-“ 8 times. Should get quieterand finally silent.
If heart rate beep does not change volume: ReplaceDisplay Board
Press <DATE/TIME><PRINT> or <DATE/TIME><FREEZE> to Save setting s.Turn system off and back on.Heart rate beep should be silent even though heart rate isdisplayed.
If heart rate beep is not silent on power up: gotoNVRAM3
Press SPO2 volume button “+” 8 times. Pulse tone shouldget audible and then louder.
If heart rate beep does not change volume: ReplaceDisplay Board hardware
Disconnect ECG cableShould hear Technical alarm and see error message.
If alarm not heard:
Press <HR ALARMS Off> button.Should stop Technical alarm sound, erase error message,and light LED in <HR ALARMS OFF> button.
If alarm not silenced:If error message not erasedIf LED not lit:
Press <HR ALARMS OFF> button again.Should hear Technical alarm sound, see error message,LED unlit in <HR ALARMS Off> button.
If alarm not heard:If error message not displayed
3.4 Diagnostic Tests
Section 3 - Troubleshooting
26 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
If LED not unlit:Turn system off and on to clear state.SPO2 pulse toneAttach SPO2 cable and cuff, and attach to simulator.Set simulator to normal heart and SPO2 settings.Should hear heart rate beep, different tone than when ECGwas connected.
If heart rate beep not heard:
Change SPO2 setting on simulator, should hear tone pitchchange up or down tracking simulator setting.
If pitch does not change with simulator SPO2 per-centage changes:
Limit Alarm, alarm volume control, Silence button,Technical Alarm, <SPO 2 ALARMS Off> buttonPress right <Select> button until SPO2 LO is flashing, pressright <Set> UP to change SPO2 LO setting to 99.Wait until SPO2 LO stops flashing (10 seconds).Set simulator SPO2 at 90%.Should hear Limit alarm.
If alarm not heard:
Press <Alarm Volume> “-“ eight times. Should get quieterbut not silent.
If alarm volume does not change: Replace DisplayBoard hardware.
If alarm volume goes all the way to silent: Replacedisplay board.
Press <Alarm Volume> “+“ eight times. Should get louder.If alarm volume does not change: Replace Display
Board hardware
Press <Silence> and start stopwatch. Should be quiet forthe time set in Advanced Configuration menu, then alarmcomes back on.
If alarm not silenced for set period:
Disconnect SPO2 cable from Atlas.Should hear technical alarm, see error message.
If alarm not heard:If message not shown:
Press <SPO2 ALARMS Off> button.Should stop Technical alarm sound, and erase error mes-
3.4 Diagnostic Tests
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 27
sage, and light LED in <SPO2 ALARMS OFF> buttonIf alarm not silenced:If error message not erasedIf LED not lit: Replace Display Board hardware
Press <SPO2 ALARMS OFF> button againShould hear Technical alarm sound, see error message,LED unlit in <SPO2 ALARMS Off> button
Turn system off and back on to clear state.
<CO2/RESP ALARMS Off> buttonPress <DATE/TIME><TREND>Get Advanced Configuration menu.Set Second trace selection to CO2.Press <TREND> to return to idle screen.Insert CO2 watertrap with hose.Breath into hose until waveform is displayed.
If waveform not displayed after 30 seconds gotoCO2 1
Remove CO2 watertrap.Should hear Technical alarm and see error message.
Press <CO2/RESP ALARMS Off> button.Should stop Technical alarm sound, and erase error mes-sage, and lightLED in <CO2/RESP ALARMS OFF> button
If alarm not silenced:If error message not erasedIf LED not lit: Replace Display Board hardware
Press <CO2/RESP ALARMS OFF> button again.Should hear Technical alarm sound, see error message,LED unlit in <CO2/RESP ALARMS Off> button.
Turn system off and back on to clear state.
<BP ALARMS Off> button
3.4 Diagnostic Tests
Section 3 - Troubleshooting
28 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
With no hose connected to BP port, press <BP START/CANCEL> button.Place finger over BP port, blocking flow, causing BP todetect overpressure and abort.Should hear Technical alarm and see error message.
If alarm not heard:If error message not displayed
Press <BP ALARMS Off> button.Should stop Technical alarm sound, and erase error mes-sage, and lightLED in <BP ALARMS OFF> button
If alarm not silenced:If error message not erasedIf LED not lit: Replace Display Board hardware
Press <BP ALARMS OFF> button againShould hear Technical alarm sound, see error message,LED unlit in <BP ALARMS Off> button
If alarm not heard:If error message not displayedIf LED not unlit: Replace Display Board hardware
Turn system off and back on to clear state.
Battery toneSystem must have been plugged into AC for at least 2hours.Disconnect AC power on running system.Connect BP hose to simulator.Press <AUTO> to select 1 minute intervals.Wait for battery to run down. With fully charged battery, afterno less than 50 minutes, should hear single tone, get mes-sage that system will shut down in 10 minutes.
If alarm tone not heard:If message not shown:
Should hear tone again in two minutes, and again twominutes after that.
If alarm tone not heard at two minute intervals:
Five minutes after first message, should start hearing toneevery minute, and get message that 5 minutes remain untilshutdown.
If alarm tone not heard at one minute intervals:If message not shown:
3.4 Diagnostic Tests
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 29
Ten minutes after first message, should hear technicalalarm, see a printout of Trend data if there is any unprintedtrend data accumulated, (which there is, we have beenrunning BP measurements) and error message that systemshutdown is imminent.
If alarm not heard:If message not shown:If Trend not printed:
Plug system back into AC.
Connect the BP port to the BP simulator.Set the simulator for a normal reading (140/80, 100BPM,NSR).Press <BP START/CANCEL>System should start pump, display manometer value inSYSTOLIC LED; this value should track and be very closeto pressure displayed by manometer in BP simulator (iffitted).Largest number shown in SYSTOLIC should be very closeto the Initial pressure setting recorded earlier from Ad-vanced Configuration in step Test Setup 1.System should step down pressure, showing step values inSYSTOLIC LED, and then display correct SYSTOLIC andDIASTOLIC values.System may show MAP value depending upon country andAdvanced Configuration setting.
If in-process display is wrong calibrate or blank:replace main boardIf final Systolic / Diastolic / MAP display is incorrect:
Calibrate BP
Press <DATE/TIME><TREND> to get to Advanced Con-figuration menuPress <Select> to highlight Initial pressurePress <Set> to change Initial pressure to 280 mmHgPress <Select> to highlight MAPPress <Set> to change MAP to YesPress <TREND> to return to idle screen.
Press <BP START/CANCEL>System should start pump, display manometer value inSYSTOLIC LED; this value should track and be very closeto pressure displayed by manometer in BP simulator (iffitted).
BP 1
3.4 Diagnostic Tests
Section 3 - Troubleshooting
30 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
Largest number shown in SYSTOLIC should be very closeto the Initial pressure setting of 280 mmHg.
If pressure shown exceeds 300 mmHg: ReplaceMain Board hardware
System should step down pressure, showing step values inSYSTOLIC LED, and then display correct SYSTOLIC andDIASTOLIC values.System should show MAP value. MAP value should matchwhat is shown by simulator.
If in-process display is wrong or blank:If final Systolic / Diastolic / MAP display is incorrect:
Calibrate BP
Set simulator to highest Systolic <=250, lowest Diastolic >=30, and lowest heart rate >=30Press <AUTO>X goes unlit, 1 flashes for 10 seconds20 seconds after 1 stops flashing, BP measurement startsBP reading as above.
If BP does not start: Replace Main Board hardwareIf BP measurement incorrect: Calibrate BP
No less than 30 seconds after completing the measure-ment another measurement should start.
If measurement does not start automatically: Re-place Main Board hardware
While it is pumping up, press <BP START/CANCEL>.Measurement stops immediately and pressure is dumped(as seen on manometer on simulator).
If measurement does not stop immediately: ReplaceMain Board hardware or Display Board hardware (ifbutton is the problem)If pressure does not drop below 10mmHg immedi-ately: Replace Main Board hardware, BP Valve
Press <AUTO> and X lights up (not flashing)
Disconnect the tubing from the BP port on the Atlas.Press <BP START/CANCEL> and note the time (to thesecond)The BP should abort with an alarm after no longer than oneminute?
3.4 Diagnostic Tests
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 31
Connect a 5 lead cable set to the simulator and to Atlas.Configure the simulator for NSR 100BPM and ImpedanceRespiration,Plug the cable into Atlas.Press <DATE/TIME> <TREND>Get Advanced Configuration menu.Press <Select> to highlight ECG lead setPress <Set> to:Set ECG lead set to 5 wireSet ECG gain to AutomaticSet ECG speed to 25mm/sSet ECG bandwidth to MonitorSet Second trace selection to ECGPress <TREND> to return to idle screenShould see:
ECG cascading onto second lineScale bar on left of top lineHeart rate displayed as set on simulatorLead Selected = IIHeart rate tone high pitchedIf ECG waveform not seenIf ECG waveform not cascadingIn Scale Bar not on top lineIf Heart Rate not displayed (or displayed incorrectly)If Lead Selected not shownIf Heart rate tone not heard
Re-install softwareReplace CPU boardReplace Main board
Press <LEAD SELECT> and step through each of the leadsettingsShould see:
Different looking ECG waveformsHeart Rate will go to dashes and alarms on someleads
Set lead selected to IIPress <DATE/TIME><TREND>Get Advanced Configuration menu.Press <Select> to change Second trace selection toRespirationPress <TREND> to return to idle screenShould see:
ECG on top lineScale bar on left of top lineHeart rate displayed as set on simulator
ECG 1
3.4 Diagnostic Tests
Section 3 - Troubleshooting
32 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
Lead Selected = IIPulse tone high pitchedRespiration waveform on second lineRespiration Rate displayed as set on simulatorIf ECG waveform not seenIf ECG waveform not cascadingIn Scale Bar not on top lineIf Heart Rate not displayed (or displayed incorrectly)If Lead Selected not shownIf Heart rate tone not heardIf Respiration waveform not shownIf Respiration Rate not displayed correctly
Re-install softwareReplace CPU boardReplace Main board
Disconnect ECG simulatorTurn system off and back on to clear state.
Connect SpO2 cable and cuff and install cuff on simulator(or your finger).Set simulator to normal readings.See pleth signals immediately
If Pleth signals not seen within 10 seconds: gotoSpO2 2
See SpO2 percentage within several secondsIf SpO2 percentage not seen within 1 minute: goto
SpO2 2
See Pulse display at the same time as SpO2 percentageIf Pulse display not seen at same time as SpO2
percentage: goto SpO2 2
Disconnect SpO2 cuff from simulatorTechnical alarm soundsSee error “SpO2 cuff not detected”
If alarm not heard: goto Sound 1If error not seen:
Reconnect SpO2 cuff to simulatorTechnical alarm stopsError message erasedUnplug SpO2 cable from AtlasTechnical alarm soundsSee error “SpO2 cable missing”
SpO2 1
Note: The Nellcor or Noninshould be accurate* to thesimulators.
*2% or 3bpm for any in-range settings on thesimulators.
3.4 Diagnostic Tests
Section 3 - Troubleshooting
SERVICE MANUAL 6200-43E REV. A WELCH ALLYN ATLAS MONITOR 33
If alarm not heard: goto Sound 1If error not seen: Re-install software
Turn system off and back on to clear state.
Verify that proper SpO2 cuff is being used: Nonin or NellcorReplace cuff.Check cable connections between SpO2 board and MainboardReplace SpO2 cuff socketReplace SpO2 board
Press <DATE/TIME><TREND>Get Advanced Configuration menuSet Second trace selection to CO2
Press <TREND> to return to idle screenInsert watertrap with tubing attachedShould see:Hear pump motor startSee dashed line waveform on lower traceSee dashes in Respiration RateSee 0 in mmHg (or % or kPa, as configured)
If pump motor does not start: goto CO2
If dashed waveform does not start: Perform CO2
calibrationIf Respiration Rate does not display dashes: Perform CO2 calibrationIf CO2 concentration is not 0: Perform CO2 calibration
Breathe gently and repeatedly over end of tubingShould see:See waveform within seconds of breathingSee respiration rate non zero within one minuteSee CO2 concentration non zero within one minute
If waveform does not track breathing: Perform CO2
calibrationIf respiration rate does not show reasonable value:
Perform CO2 calibrationIf CO2 concentration does not show reasonablevalue: Perform CO2 calibration
If CO2 calibration did not solve problem, replace CO2 boardRemove watertrap from AtlasTurn system off and back on to clear state.
Press <DATE/TIME><TREND>
SpO2 2
CO2 1
3.4 Diagnostic Tests
Section 3 - Troubleshooting
34 WELCH ALLYN ATLAS MONITOR SERVICE MANUAL 6200-43E REV. A
Get Advanced Configuration menuSet Second trace selection to CO2
Press <TREND> to return to idle screenRemove and reinsert watertrap in socket. Make sure that itseats fully.
If pump does not start:Insert finger in socket and attempt to pressmicroswitchIf pump does not start:
Check connections between CO2
board and Main boardCheck connections between CO2
receiver and CO2 boardReplace CO2 receiverReplace CO2 board
Temp display is blankConnect temp probeSee temp display of ambient temperature
If display is not close to ambient temperature: Cali-brate Temp – if out of spec, replace probe, repeat. Ifstill out of spec, replace main board.
Disconnect temp probeTemp display becomes dashes
If temp display does not become dashes: Replacemain board
Turn power off and back on and see if anomaly returnsRe-install softwareRepeat test
If problem remains: Replace CPU board
Models 622xx and 623xx:If fan does not start when power turned on:
Check Fan to Main board cableReplace FanReplace Main board
CO2 2
TEMP1
Bad Boot 1
Fan 1
3.4 Diagnostic Tests
WELCH ALLYN ATLAS MONITOR 1SERVICE MANUAL 6200-43E REV. A
Section 4 - Disassembly and Repair, Domestic
About Section 4This section is a guide for disassembly and reassemblyof the Atlas Monitor. Always refer to current revisionschematics, diagrams and final safety test proceduresbefore attempting to service this device.
Do not attempt to service this instrument unlessyou have received Service Training from WelchAllyn or an authorized agent, and are equipped withapproved processes and test equipment. For moreinformation about this call the Welch Allyn Cus-tomer Service phone number listed in Section 1 ofthis manual.
General:The outside housing is removed to provide full accessto all internal printed circuit boards and other compo-nents. Most of these are held in position with the sur-rounding “E-Pac” foam. E-Pac provides shockabsorbtion, ventillation channels, and spaces for thecomponents and boards. Pneumatic tubing and cablesmust be placed correctly in E-Pac to avoid problems withpinched tubing.
Problems During Service:A Technical Support phone number is listed in Section 1of this manual to answer questions you may have duringthe servicing of the Atlas Monitor.
Printer:Print-head, printer motor, and printer roller can be re-placed as necessary.
Printed Circuit Boards:There are no component level repairs for the PrintedCircuit boards. These are replaced if found to be de-fective. During the warranty period, boards that are foundto be defective should be returned to Welch Allyn.
CRT:The CRT and CRT Deflection Board are aligned at thefactory and as such are replaced as a matched set ifone or the other should fail in service.
Abstract of Disassemblyand Reassembly :
EXERCISE EX-TREME CAUTIONWHEN SERVICINGTHE ATLAS MONI-TOR! THE CRT AS-SEMBLY AND CRTD E F L E C T I O NBOARD OPERATEON APPROXI-MATELY 8,000VOLTS.
2 WELCH ALLYN ATLASMONITOR
Section 4 - Disassembly and Repair, Domestic
SERVICE MANUAL 6200-43E REV. A
4.1.1 Open the paper door and remove thepaper roll. Close paper door.
.
4.1.2 Remove 4 Torx Machine screws withTorx - 10 screw driver.
4.1.3 Open the rear housing anddisconnect 2 ground wires fromground lug as well as printer cable..
4.1 MODEL 200 Dissassembly.
Unplug Monitor fromMains before disassem-bly! EXERCISE EXTREMECAUTION WHEN SERVICINGTHE ATLAS MONITOR! THECRT ASSEMBLY AND CRT DE-FLECTION BOARD OPERATEON APPROXIMATELY 8,000VOLTS.
ESD: Circuit boards are sensitiveto static electricity. Use wrist strap,ESD mats and ESD storage bags.
Place Monitor on a foam pad toprotect the front of the unit and thepressure fitting on the front of theunit.
Caution: Do not pull display cable.
Model 200
WELCH ALLYN ATLAS MONITOR 3SERVICE MANUAL 6200-43E REV. A
Section 4 - Disassembly and Repair, Domestic
4.1.4 Unplug the printer cable from jackJ7 of the Main PCB.
4.1.5 Remove Pump section.
4.1.6 Unplug Display Board Cable fromjack J8 of the Main PCB.
Note: Make sure this end of the cable isinstalled in J8 during reassembly sothat cable folds will be correct.
4 WELCH ALLYN ATLASMONITOR
Section 4 - Disassembly and Repair, Domestic
SERVICE MANUAL 6200-43E REV. A
4.1.8 Unplug CPU/PCB from Main PCBPCA connector J4.
4.1.7 Remove E-Pac from over the CRT.
4.1.9 Unplug CRT socket board.
Do not bend pins.
WELCH ALLYN ATLAS MONITOR 5SERVICE MANUAL 6200-43E REV. A
Section 4 - Disassembly and Repair, Domestic
4.1.10Protect CRT pins with cap T-XXXXX
4.1.11 Unplug Yoke cables from connectorJ2 of CRT Deflection Board.
4.1.12Unplug CRT Deflection Board fromMain PCB with connector tool T-16654
Do not bend pins.
6 WELCH ALLYN ATLASMONITOR
Section 4 - Disassembly and Repair, Domestic
SERVICE MANUAL 6200-43E REV. A
4.1.13Unplug 4 connectors from side ofMain PCB.
4.1.14Remove Power Supply assembly.
4.1.15Remove alarm speaker.
WELCH ALLYN ATLAS MONITOR 7SERVICE MANUAL 6200-43E REV. A
Section 4 - Disassembly and Repair, Domestic
4.1.16 Remove Main PCB from E-Pac and disconnect tubing and connectors.
4.1.17 Disconnect SpO2 board and remove it from E-Pac.
4.1.18 Remove main E-Pac section.
8 WELCH ALLYN ATLASMONITOR
Section 4 - Disassembly and Repair, Domestic
SERVICE MANUAL 6200-43E REV. A
4.1.19Disconnect tubing from fitting.
4.1.20Remove SpO2 connector fromfront panel.
4.1.21Remove CRT ground wire. Do notremove screw and washer.
WELCH ALLYN ATLAS MONITOR 9SERVICE MANUAL 6200-43E REV. A
Section 4 - Disassembly and Repair, Domestic
4.1.22 Remove opposite CRT` mounting screw and remove CRT.
4.1.23 Remove Keypad circuit board.
4.1.24 Remove Display PCB.
10 WELCH ALLYN ATLASMONITOR
Section 4 - Disassembly and Repair, Domestic
SERVICE MANUAL 6200-43E REV. A
4.1.25 Remove soft keys from Bezel.
4.1.26 Unscrew Alarm Silence Buttonholding screw to remove Silencebutton.
4.1.27 Remove printer by depressing tab.
WELCH ALLYN ATLAS MONITOR 11SERVICE MANUAL 6200-43E REV. A
Section 4 - Disassembly and Repair, Domestic
4.1.28 Slide printer out of rear housing.
4.1.30 To remove printhead, disconnectcable from printer PCB.Lift spring and remove printheadfrom printer frame.
4.1.29 Unplug motor connector. For reassembly, placeconnector on motorso orange wire is nearmounting screw.
12 WELCH ALLYN ATLASMONITOR
Section 4 - Disassembly and Repair, Domestic
SERVICE MANUAL 6200-43E REV. A
4.1.32Remove connector.
Flex circuit is delicate. Therefore,do not pull on connector.. Usesmall screwdriver to pry connectorapart.
4.1.33For reassembly of printhead, uselong nose pliers to attach cable toeliminate stress on flex circuit ofprinthead.
4.1.31Remove backing plate.
WELCH ALLYN ATLAS MONITOR 13SERVICE MANUAL 6200-43E REV. A
Section 4 - Disassembly and Repair, Domestic
4.1.34 Slide Power Supply cases apart.
4.1.35 Location of Power Supply fuse.
4.2 MODEL 200 Re-assembly.
Reassemble in reverse order ofdisassembly with special attention topaths for cables and tubing.
4.2.1
Two types of screws are used. Dis-play PCB is fastened with self tap.
14 WELCH ALLYN ATLASMONITOR
Section 4 - Disassembly and Repair, Domestic
SERVICE MANUAL 6200-43E REV. A
4.2.2 Detail of Pump/Valve/CheckValvesubassembly for reassembly.
4.2.3 Printer chassis rests on lip at back ofcase.
4.2.4 The IEC connector must becentered in the hole before 4screws can be installed.
WELCH ALLYN ATLAS MONITOR 15SERVICE MANUAL 6200-43E REV. A
Section 4 - Disassembly and Repair, Domestic
4.3 Other models dissassembly/reassembly.
Due to the similarities between theATLAS models, only key points areshown. Refer to the latest revisioninterconnect drawing, schematics, andlayouts when servicing this product.
4.2.5 Plug MCU/PCB in like this.
Appendix A 10/14/99
Theory of Operation – Model 622/623
1 DC/DC Power Supply1.1 Overview:1.2 On/Off Circuits
1.2.1 Backup Regulator and Micro-Controller1.2.2 18V boost converter and FET ON/OFF switch
1.3 +12V Boost Converter1.4 Battery Charger:1.5 Linear Regulators – 5VDC and 3.3VDC
1.5.1 5V regulator1.5.2 3.3V Regulator
2 Patient Isolated Circuits2.1 Isolated Power2.2 A/D Circuits
2.2.1 PWM A/D2.2.2 A/D Multiplexer
2.3 Serial Communication2.4 Signal Isolation2.5 ECG Circuits
2.5.1 Overview2.5.2 Defib Protect, RFI Filtering2.5.3 Front End Buffer - 1st Gain Stage2.5.4 Wilson Network - Lead Select Mux2.5.5 Differential Amplifier and Slew rate limit2.5.6 Right Leg Drive Amplifier2.5.7 High Pass and Gain Stage
2.6 Temperature Amplifier2.7 Impedance Respiration
2.7.1 Overview2.7.2 Signal Source – Current Drive2.7.3 Differential Amplifier and Peak Detector2.7.4 Gain and Filtering
2.8 SpO2 Circuits3 Non-Isolated circuits - A/D and Mux
3.1 A/D – grounded circuits3.2 A/D Mux – grounded circuits
4 NIBP Circuits4.1 Overview - Safety:4.2 Primary Transducer - Amplifier:4.3 Safety Transducer - Amplifier
4.3.1 Current Source:4.3.2 Differential Amplifier and Offset Centering:
4.4 Hardware Overpressure:4.5 Pump and Relay Drive:
5 CRT Deflection Board5.1 Overview:5.2 Vertical Amplifier:
5.2.1 Ramp Generator:5.2.2 Vertical Amplifier:5.2.3 Zero Adjust:
5.3 Horizontal Amplifier:5.3.1 Horizontal Gain:5.3.2 Grid Voltages:
5.4 Video Amplifier:
Appendix A 10/14/99
6 Recorder Electronics6.1 Overview:6.2 Power Supply – 24 Switcher6.3 Motor Driver:6.4 Temperature Amplifier:
Appendix A 10/14/99
1 DC/DC Power Supply
1.1 Overview:
Atlas Model 622 and 623 can be powered either from AC or battery. A 50W, medical grade, offlineswitcher provides 12VDC from a universal AC input (85VAC to 264VAC – 50/60Hz). The battery is arechargeable 6-Volt, 6.5 Amp-Hour, Sealed Lead Acid Battery, and will provide about 1.5 hours on a fullycharged battery (Battery Life depends on usage, especially printer usage, NIBP cycles, and CO2operation).
The unit will operate from AC when the unit is plugged in, and switches to battery operation when AC isremoved. The battery is automatically charged whenever AC is connected.
The following supplies are generated on the Atlas Main Board: +12V DC Input: Output of AC/DC supply or Battery. Supply for CRT and miscellaneous analog circuits.
+5V DC Input: Output of Battery Charger or Battery. Supply for front panel LED’s.
+3.3V DC Input: +5V DC Supply for CPU board. Backup Regulator: Input Output of AC/DC supply or Battery. 3.3V supply, for real time clock and On/Off circuits.
Battery Charger: Input: Output of AC/DC supply Charge SLA battery.
+12V
AC Not Present
+5V
+3.3V
On/Off
AC Present
AC+12V
Battery
On/OffControlCircuits
+12VDCRegulator
BatteryCharger
+5VDCRegulator
+3.3VDCRegulator
AC/DCConverter
DC/DC CircuitsBlock Diagram
D310
Q311
Q303
BackupRegulator
1.2 On/Off Circuits
1.2.1 Backup Regulator and Micro-ControllerA 3.3V low backup regulator, U307, provides power to the On/Off circuits and provides power to the realtime clock on the CPU board. The On/Off circuitry is controlled by the mirocontroller U10. This
Appendix A 10/14/99
controller performs the following functions:
1. Monitors the status of the front panel ON-OFF key. If the unit is off and the ON-OFF key is pressed,the controller will drive U10-6 high, which will enable power to the remainder of the instrument.2. At power up, the microcontroller will drive the beeper for about 1 second.3. At power up, the microcontroller will reset Shift Register U2. This will cause the following: The front panel LED's are blanked. The NIBP pump drive is placed in the off state.4. When the unit is powered on the microcontroller will communicate with the system CPU. When thefront panel ON-OFF key is pressed, the CPU will store away present operating conditions, then issues acommand to the microcontroller to shut instrument power off. U10-6 is driven low which will removepower from the remainder of the instrument.
1.2.2 18V boost converter and FET ON/OFF switchThe PWM controller, U301, is configured as an 18V boost-converter. An N-Channel MOSFET transistor,Q303, is used to switch power to the 12V regulator. As Q303 is configured as a high side switch, it isnecessary to develop a gate voltage of proper magnitude to turn Q303 on. Then, to enable power to the12V regulator, the following takes place:1. The microcontroller drives U10-6 high, turning transistor Q302 on.2. Transistor Q301 is switched on, supplying power to the PWM controller, U301.3. The boost regulator develops 18VDC, which will switch transistor Q303 On.
D D
D
D
U301-comp
u307-6
Q301-b
U301-sw
Q302-c
Q302-B
U301-pwr
U301-7
U301-ct
VBackup
AC+12V
Battery
+Vfuse
V
U2-Reset
On/Off-Key
PIC-Data
On/Off
Vbackup
PIC-audio
PIC-Clk
+18V
+ C301330uF
+ C304100uF
HS301
6078
R3051
+C3021uF
Q303MTP30N06VL
2 3
1
4
D301MBR2535CTL
1
324
+ C3324.7uF
U307
LP2951CD-3.3
873
62
15
4
VINFDBKSHTDN
TAPSENS
VOUTERR
GND
Q301MPSW51A
3
2
1
C303470pf
D302BAV99L
1
3
2
R3021.96K
F303
4Amp
U301MC34063AD
53
78
1
26
4
COMPTCAP
IPKIDC
ISWC
ISWEVcc
GN
D
+ C3391uF
R30351.1K
R304100K
Q302MMBT3904L
31
2
+ C3314.7uF
R30110K
R3074.64K
L3011mH
R30661.9K
C42.047uF
U10
D620361-MX10000
2
5
7
4
3
6
1 14
8
9
10
11
12
13ClkIn/Osc1/RB5
TC5/TOCK1
RC3
Vpp/MCLR/RB3
Clkout/Osc2/RB4
RC4
Vdd
Vss
RC2
RC1
RC0
RB2
RB1
RB0
R2210K
On/Off Circuit18V Boost - Mosfet Gate Voltage
On/Off Switch
Heatsinkfor D301
(Front Panel Key)
(pg 1)
(pg 3)
(To U2)
Appendix A 10/14/99
1.3 +12V Boost ConverterThe +12V boost circuit provides regulated 12VDC. The input to the 12V converter is either battery or12V from the AC/DC converter. The circuit is configured as a boost PWM using current mode feedback.The PWM controller is a UC3843A. The controller includes an internal 2.5V, 2% reference, and anexternal 5V, 2% reference. Nominal output voltage for the boost converter is Vout = [2.5V*(1 +173.8K/4.64K)] = 12.1V.
The UC3843A requires 8.5V minimum to power on. The maximum voltage allowed on the switchingtransistor, Q305, is 15V. To meet both these requirements, the UC3843A is powered from 12.9V (+18V –5.1V zener diode D303)
When operating from battery, the converter will run at duty cycles over 50%, which requires slopecompensation for a current mode controller. Slope compensation is achieved by summing in part of theoscillator signal (pin 4) with the current sense line.
The PWM controller is current limited on a cycle to cycle basis by monitoring the voltage on the Isenseline, U302-5. Current limit is activated when the voltage at the sense line reaches 1V. The nominal DCvoltage at Isense is about 0.5V when operating from battery only, and 0.7V when operating from AC.Then, current limit is set to 5Amps when Atlas in operating on battery and 3Amps when operating onAC.
Q30
5-s
D304-C
Q30
5-gU302-comp
U302-pwr
U302-fb
U30
2-ou
t
D312-c
C305-1
Q304-e
L302
-1
U302-sense
Q305-d
U302-ct
Q303-s
AC+12V-fuse
+12V
5VRef
+18V
+V
L305Bead
C307.047uF
R315196
D304MBRS340T3
L303Bead
+ C3061uF
D3035.1V
13
U302UC3843A
3
57
14
1
10
812
911
VFB
ISENSERT/CT
VREF
COMP
OUT
PW
R-G
ND
Vcc
GN
DV
c
R3123.83K
R30817.8K
+ C3111000uF
R31110K
C3095600pF
R31410
C3082200pF
+ C3121000uF
R3177.5K
R3131.96K
R31010K
C336.047uF
D312BAV99L
1
3
2
R3160.1
+ C313330uF
+ C3101000uF
R3094.64K
C3055600pF
C335.047uF
Q304MMBT3904L
3
1
2
L30222uH
Q305
MTP30N06VL
23
1
4
+12V Boost(12.1V nominal)
Appendix A 10/14/99
1.4 Battery Charger:The battery charger is a PWM buck converter. The input to the battery charger is 12VDC from the offlineswitcher. The UC3843A, normally a current mode controller, is configured for voltage feedback mode.The UC3843A has an under-voltage lockout for Vcc<8.5V. The controller operates such that with Vccless than 8.5V, the reference out is 0V, and will be at 5V with Vcc>8.5V. Then, the reference out (pin 14)can be used as an AC-ON detect signal.
The switching transistor for the buck converter is a P-Channel MOSFET (Q308). The output drive of thecontroller is the wrong polarity for driving a P-Channel MOSFET in a step down mode. Therefor,transistor Q306 is added to invert the PWM out signal. Fast turn-on of Q308 is provided when Q306 islow, fast turn-off is though Q307 (configured as an emitter follower).
The battery charger is a current limited - temperature compensated charger. Current limit is set to1.5Amps. Current through the 0.1Ohm sense resistor R327 is measured with Diff-Amp U305B. When thecharger current is at 1.5Amps, feedback is controlled by Op-Amp U304A. When the current drops below1.5Amps, the output of U304A goes low, reverse biasing Diode D308, and feedback will be controlled byOp-amp U304B.
Battery charge voltage is temperature compensated using Thermistor RT301, a 10K negative temperaturecoefficient resistor. Voltage over temperature follows the following charge profile:
Temperature Voltage Thermistor0C 7.05V 26.9K10C 7.0V 20.7K25C 6.85V 10K40C 6.7V 5.17K50C 6.65V 3.45K
For optimum battery life, the float voltage (25C, full charge) should be set to 6.85V +/- 50mV (6.85V +/-0.7%). To accomplish this tight tolerance, charge voltage at room temperature will be adjusted withpotentiometer R328. Nominal charge voltage at room temperature is:Vcharge = 5V * (1 + RA/RB) where,
5V is the reference in U303.RA is the series/parallel combination of R335, R336, and RT301 (nominal 3.465K @ 25C).RB is the series combination of R337and R338 (nominal 936 Ohms)
It is necessary to minimize current out of the battery when the unit is off. To reduce off current, transistorQ309 disconnects the battery from the battery sense resistors when AC in off. In addition, diode D307 isadded to prevent current from flowing from the battery into the battery current sense circuit, and to theoutput of the AC/DC converter.
Appendix A 10/14/99
+12V
Ref-Batcharge
ACON
ACON
Ref-Batcharge
Ref-Batcharge
AC+12V-fuse
AC+12V-fuse
U305-pwr
AC+12V
Battery
To Linear Regulators
U30
4-1
Q30
6-b
U305-6
Q307-e
Q308-d
U304-5
U304-3
Bat-Adj
U303-ct
RT
301-1
U303-5
R339-2
U304-7
Q306-c
D307-A
Bat-fuse
Q308-g
Q309-3
U304-6
C319-1
Q309-b
U305-5
U30
3-ou
t
U304-2
Batt-fb
U303-cp
Q310-b
F302-2 AC+12V-fuse
R343-1
U303-fb
+
-
U304AMC34072
3
21
84
D305BAV99L
1
3
2
R34410K
Q308MTP23P06V
2
1
34
R33319.6K
R32610
R331
33.2K
R3207.5K
+ C318330uF
Q309MMBT3906L3
12
R323 1.96K
R32410K
Q307MMBT3904L
3
1
2
C3162200pF
R3251.96K
Q310MMBT3904L
31
2
D307MBRS340T3
R34110K
C315.047uF
+
-
U304BMC34072
5
67
84
R3354.32K
R34010K
R33219.6K
Q306MMBT3904L
31
2
L30447uH
R34219.6K
C322.047uF
+
-
U305BMC34072
5
67
84
R3378.87K
R3291K
D308 BAV99L
1
3
2
C321.01uF
C314.047uF
R32210K
R33419.6K
D306MBRS340T3
R3281K
R33919.6K
R33033.2K
R34510K
t
RT30110K
R32127.4K
F3014Amp
F3024Amp
R3270.1
U303UC3843A
3
57
14
1
10
812
911
VFB
ISENSERT/CT
VREF
COMP
OUT
PW
R-G
ND
Vcc
GN
DV
c
R338
1K
13
2
R3367.5K
+C3191000uF
R34310K
R31810K
R31919.6K
C320.01uF
C337.047uF C338
.047uF
D309BAV70L
1
3
2
L306BeadC340
.047uF
Float Voltage
Current Limit(1.5 Amp)
BatteryCharger Input to 5V and
3.3V linearregulators.
1.5 Linear Regulators – 5VDC and 3.3VDC
1.5.1 5V regulatorA series pass 5V regulator is built using transistor Q312 and op amp U305A. The reference for theregulator is the 5V reference from the PWM control IC U302. The output of the 5V regulator is turned offwhen the unit is turned off. When the 18V-boost circuit is shut down, power is removed to U302, and thenthe U302 reference is driven to 0V. Setting the reference to 0V will cause op amp U305 to turn the seriespass transistor Q312 off.
When operating from AC, transistor Q310 is turned on, which will turn transistor Q311 off. Power to the5V regulator is then provided through Diode D310 from the output of the battery charger circuit. Note thatthis voltage tap is before the current sense resistor, then load current on +5V does not affect the batterycharger current limit circuit. When AC is removed, the AC-On signal goes low, and Q310 turns off. Thegate of Q311 is then pulled up to 11.4V (12V – Vdiode). Transistor Q311 then turns on, and the 5Vregulator is powered from the battery.
1.5.2 3.3V Regulator3.3VDC is derived using a three terminal regulator. The output of the 5V regulator is used to power the3.3V regulator. The 3.3V regulator does not have an independent shutdown, but powers down as the 5Vregulator shuts down.
Appendix A 10/14/99
DDD
+12V
D
+12V
+Vpump
+3.3V
5VRef
AC+12V-fuse
+5V
ACON
Battery
Batt Charger input
To Q309
U305-3
C324-2
U30
5-1
U30
5-2
Q312-g
Q310-b
R343-1
U306LF33CV
1 3
2
IN OUT
GN
D
C326.01uF
D310MBRS340T3
C3241000pF
R34710K
R346100
+ C323100uF
HS302
6078
Q311MTP30N06VL
23
1
4
R350
10K
D311BAV70L
1
3
2
+ C329100uF
C327.047uF
C330.047uF
+ C325100uF
R34910K
Q312
MTP30N06VL
2 3
1
4
C328.047uF
R34810K
+
-
U305AMC34072
3
21
84
R34310K
R34510K
Q310MMBT3904L
31
2
R34219.6K
D309BAV70L
1
3
2
R34410K
R34110K
+5V LinearLowDropout
HeatsinkforQ312
From BateryCharger Circuit.
2 Patient Isolated Circuits
2.1 Isolated PowerIsolated power is provided to the ECG, Temperature, Respiration and SpO2 circuits using an IsolationTransformer, T401. The power supply is a PWM controlled flyback converter. The PWM controller is anLM3524. Output voltage f+V is sampled and compared with the reference voltage s+5V. An error voltageis generated, and this voltage returned via opto U410. Voltage f+V is regulated to 7.4V. Additional tapson transformer T401 provide f-V (-7.4V). The switcher operates at 76.8KHz, controlled by a sync signalfrom the CPU board. The power supply is synchronized with the A/D converter used to digitize ECG,Temperature and Respiration signals.
S
S
S
S
S
SS
ED SE
S
FE-Pwr-Sync
+5V
+12V
+12V
f+V
s+5V
f-V
f+V
U402-1
C409-1
T401-4
Q40
1-g
U402-sen
opto-fb
iso401-a
Q40
2-e
Q401-s
U401-1
C408-2
U401-2iso401-b
U402-e
U402-ref
U402-rt
U401-3
f+V T401-1
T401-8
R419-2
U402-ct
R405215
C409470pf
R4031K
+C405100uF
+
C407100uF
R40710
D405BAV99L
1
3
2
R4095.11K
R408100
C410.01uF
R4060.2 R410
7.5K
Q402MMBT3906L 3
12
C414.047uF
R4115.11K
U402
LM3524DM
12
16
15
945
10
67
12111314
3
8
V-V+
VREF
VIN
COMP+SENSE-SENSE
SHTDWN
RTCT
CAEACBEB
OSCOUT
GN
D
+ C41210uF
U4104N25
1 6
2
5
4
C408.01uf
R40210K
R404196K
C402.047uF
C404.047uF
C420.047uF
C4112200pF
R42210K
+
- U401ALM358
3
21
84
D403
MBRS130T3
D401MBRS130T3
R4235.11K
R40110K
C433470pf
R419215
Q401MTD3055V
23
1
4
R41710K
TP459
TP462
TP464TP463
TP450
TP449
TP453
TP454
TP456
TP458
TP451
TP455
TP457
TP466
T401
IsoXfmr
5
8
1
2
3
4
IsolationBarrier
PatientIsolatedCircuits
GroundedCircuits
Appendix A 10/14/99
From the raw f+V and f-V voltages, the following supplies are generated for the various patient isolatedcircuits:1. iso+5dig: Regulated 5V supply. This voltage is used to power the opto-isolators, digital control logic,
and 5V digital supply for the Nellcor SpO2 board.2. s+5V: Regulated +5V supply: Analog 5V supply for the Nellcor SpO2 board. This is also the
reference voltage used in the regulation of f+V.3. f+5V: Regulated +5V supply: Filtered and buffered from s+5V, this voltage is used for the A/D
reference.4. s-5V: Regulated –5V supply: Analog –5V supply used for the Nellcor SpO2 board.5. fVcc: LC Filtered voltage, derived from f+V. This voltage is used to power the Op-Amps used in the
ECG, Respiration, Temperature, and A/D circuits.6. fVee: LC Filtered voltage, derived from f-V. This voltage is used to power the Op-Amps used in the
ECG, Respiration, Temperature, and A/D circuits.
S
S
S
S
S
S
S
S
S
S
S
S
SS
S
S SS
fVcc
iso+5Vdig
s+5V
fVee
s-5V
f+V
f-V
f+5V
f+V
U40
3-fb
U401-7U401-5
+
C421
1uF
C401.047uF
TP468
L401 220uH
U40479L05
2 1367
5
IN OUTINININ G
ND
+ C43110uF
TP452
+ C4151uF
+ C43210uF
+ C406100uF
C403.047uF
C430.047uF
U40778L05
8 1
2 3 6 7
IN OUT
GN
D
GN
D
GN
D
GN
D
+ C43410uF
C424.047uF
+ C43510uF
U403LP2951C
873
62
15
4
VINFDBKSHTDN
TAPSENS
VOUTERR
GND
L402 220uH
+C4184.7uF
C417680pF
TP461TP460
+
-
U401BLM358
5
67
84
R41610K
TP465
R415100
C416.047uF
Isolated Supply VoltagesRegulation and Filtering
2.2 A/D Circuits
2.2.1 PWM A/D
A pulse width modulator is used as an A/D converter. The PWM runs at a 1.2KHz rate, synchronized bythe A/D sync signal. A/D sync is low for 52.1uSec, high for 781.25uSec. Using the values shown, theintegrator will ramp down 10.01V, and ramp up 25V. The voltage at the integrator output (U601-1) islimited to about 5V [5V*(73.2/83.2) + Vdiode)]. Then, the integrator starts at 5V and ramps linearlydown to –5V.
The analog input voltage to be digitized and the integrator output are the inputs to a comparator. Theoutput of the comparator is low at the start of an A/D cycle, and switches high as the integrator rampdrops below the input voltage being digitized (see the timing diagram below). A/D conversion isaccomplished by measuring the width of the PWM output signal. The A/D timer runs at 25.175MHz, thenthe A/D resolution is about 21000 counts (over 14 bits). Hysteresis is added to the comparator to avoidoscillations during switching. Note that since the output of the comparator is low at the start of the A/Dcycle, a resistor divider is formed at the comparator input. This divider reduces the Analog-In signal by0.75% [464K/(464K+3.48K)].
Appendix A 10/14/99
EfVee
fVcc
E
f+5V
fVee
fVcc
E
iso+5Vdig
f+5V
Analog In
PWM-Out
U60
2-7
U601-2
U604-10
D601-2
U60
2-5
U60
2-2
U601-3
U601-1 U602-3
R607464K
R6081K
R60110K
R60346.4K
R6063.48K
C601
1000pF
C603680pF
D601MMBD1503A
1
3
2
R60410K
+
-
U601AMC34072
3
21
84
R60273.2K
+
- U602LM311
2
37
5 64 1
8
R6053.48K
U604D74HCT04
9 8
14
7
PWM-Out
IntegratorInput
+5V
-5V
(U604-10)
PWM A/DConverter
833uSec
52uSec
Analog In
ComparatorInputs
(U604-8)
f+5V
E
A/D-sync
U604E74HCT04
11 10
14
7
PWM-timer
2.2.2 A/D MultiplexerA 16-channel multiplexer (formed by two 8-channel multiplexers) is used to select the analog signal to bedigitized. Control of the multiplexer is through a serial communication channel from the main CPU. Thefollowing signals are digitized:
1. Ground Ground Reference for digitized signals, used in calibrating the A/D converter2. f1.24V Reference Voltage, used in calibrating the A/D converter3. ECG Amplified ECG signal4. V Buffer Output of the V-lead buffer, used to determine leads off5. LL Buffer Output of the LL-lead buffer, used to determine leads off6. LA Buffer Output of the LA-lead buffer, used to determine leads off7. RA Buffer Output of the RA-lead buffer, used to determine leads off8. RL Output Output of the RL amplifier9. Patient Temp Analog voltage representing patient Temperature10. Respiration Amplified Respiration signal11. Resp Leads Off DC impedance for respiration, used to determine respiration Leads off.
Appendix A 10/14/99
2.3 Serial Communication
Serial data is transmitted to the isolated circuits through Optical Isolators. The following signals aretransmitted from the CPU board to the isolated circuits:
1. FE-Serial-Data: Serial Data transmitted from the CPU board to the Isolated circuits.2. FE-Data-Clk: Serial Data Clock.3. A/D Clk: Serial Data latch. Also used as clock for PMW A/D converter.
Serial Data is converted to a parallel format using Shift Register U605 and U606. The following Data istransmitted from the CPU board to the isolated circuits:
1. Mux-A/D-A Control bit A for A/D Mux2. Mux-A/D-B Control bit B for A/D Mux3. Mux-A/D-C Control bit C for A/D Mux4. Mux-Lds-A Control bit A for ECG Lead Select Mux5. Mux-Lds-B Control bit B for ECG Lead Select Mux6. Mux-Lds-C Control bit C for ECG Lead Select Mux7. Sw-RLD-RA Switch Reference Electrode to RA8. Sw-RLD-LA Switch Reference Electrode to LA9. Sw-RLD-LL Switch Reference Electrode to LL10. Sw-RLD-RL Switch Reference Electrode to RL11. MonBW Select 0.5Hz ECG high pass pole (used to restore ECG baseline).12. MuxB 0 – Select A/D Mux B; 1 - Select A/D Mux A13. Sw-RLD-V Switch Reference Electrode to V14. Sw-RespReset Switch Respiration High Pass Pole, used to restore baseline15. SpO2Reset Reset Nellcor SpO2 board16. Resp-Off Turn respiration off when respiration not used (shuts down drive signal).
fVcc
fVee
fVeefVcc
E
E
E
E
LA
vRL
V+
RA
LL
Analog ECG
f+1.24V
Resp-LdsOffAn-Resp
Patient-Temp
Mux B
Mux A
Analog In
Mux-A/D-AMux-A/D-BMux-A/D-C
U6034051
131415121524
611109
3
168
7
X0X1X2X3X4X5X6X7
INHABC
XVD
DV
SS
VEE
U6094051
131415121524
611109
3
168
7
X0X1X2X3X4X5X6X7
INHABC
XVD
DV
SS
VEE
MuxA
MuxB
Appendix A 10/14/99
ED
ED
iso+5Vdig
SW-RLD-LL
SW-RLD-RASW-RLD-LA
SW-RLD-RL
SpO2-Reset
Mux-Lds-C
Resp-Off
Sw-RespReset
Mux-Lds-BMux-Lds-AMux-A/D-CMux-A/D-BMux-A/D-A
Sw-RL-VMuxB
MonBW
FE-Serial-Data
FE-Data-Clk
A/D-Clk
U605-out
U606
74HCT595
14
1110
1213
151234567
9
16
8
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
VCC
GND
U605
74HCT595
14
1110
1213
151234567
9
16
8
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
VCC
GND
2.4 Signal IsolationOptocouplers are used to electrically isolate signals. The following signals are transmitted across theisolation barrier through the optocouplers:
1. SpO2 out: SpO2 serial data, waveform and status information. Opto U411 Data from the SpO2 board to the CPU board.2. Serial Data: Serial Control data for isolated circuits. Opto U613 Data from the CPU board to isolated circuits.3. Serial Data Clock: Data clock for serial control data. Opto U612 Clock from the CPU board to isolated circuits.4. ADC Clock Clock for PWM A/D converter, also used to latch control shift registers. Opto U611 Clock from the CPU board to isolated circuits.5. PWM A/D data A/D Pulse width data. Opto U610 Pulse width data from isolated circuits to CPU board.6. Respiration Clock Clock for Respiration drive circuit (same signal as power supply sync) U710 Clock from the CPU board to isolated circuits.
2.5 ECG Circuits
2.5.1 OverviewThe front end will meet all applicable AAMI standards. Atlas provides a 5-wire front end, and will becompatible with both a 3-wire and 5-wire cable. Monitor (0.5Hz to 40Hz) Extended (0.05Hz to 100Hz)bandwidth will be provided. The ECG amplifier always transmits 0.05Hz to 100Hz data to the CPU board(unless in baseline restore mode), additional filtering for Monitor Bandwidth is implemented in software
2.5.2 Defib Protect, RFI FilteringThe ECG lead set includes a 1K resistor for current limiting. The neon bulbs act as a voltage clamp,limiting voltage to about 100V. Neons are chosen for their low capacitance and high DC isolation. Seriesresistors and diode clamps are used as a second set of protection for the front-end amplifiers. ResistorsR506, R507 and Diodes D506, D507, are used to reverse bias the lead clamp diodes (D501 to D505). Twopassive RC filters are used to reduce susceptibility to RFI and ESU.
Appendix A 10/14/99
fVcc
S
fVee E
E E
RA
+clamp
D501-3
-clamp
N501LAMP NEON C506
220pF
D5075.1V
1 3
R50710K
C501220pF
D5065.1V
13
D501MMBD1503A
1
3
2
R50610K
R50810K
R50151.1K
Defib ProtectRFI Filtering
To Buffer Amp
2.5.3 Front End Buffer - 1st Gain StageGain of the first stage is 9.26 (1+10K/1.21K). Bias current for each input buffer is set to 1.25V/44Meg =28nA (VldsOff = 1.25V). On a leads-off condition, the two 22Meg resistor drives the input of the buffer to1.25V (VldsOff), and the amplifier output saturates high (at about 5.5V). The voltage out of each buffer ismonitored to detect a leads-off condition.
fVcc
fVee
E
VLdsOff
OutIn
U501-3
U501-2
R509-1
+
-
U501AMC34002
3
21
84 C510
220pF
R5181.21K
R51710K
R55722Meg
R50922Meg
0.1%
0.1%
Input BuffersGain = 9.26
2.5.4 Wilson Network - Lead Select MuxA 5 wire front end must be able to render the following vectors:
I LA - RAII LL - RAIII LL - LAaVR RA - 1/2*(LA + LL)aVL LA - 1/2*(RA + LL)aVF LL - 1/2*(LA + RA)V V - 1/3*(RA + LA + LL)
A resistor divider network (Wilson Network) is used to create the terms above. These vectors are thenswitched though the two Mux’s, into the differential amplifier.
Appendix A 10/14/99
E
fVee
E
E
fVee
fVcc
fVcc
E
V+
RA
LA
LL
RA
V-
LL
aVL
RA
aVF
LAaVR
LA
V+
LA mux+
LL
mux-
RA
R533 10K
R536 10K
R530 10K
R529 10K
R532 10K
U5064051
131415121524
611109
3
16
8
7
X0X1X2X3X4X5X6X7
INHABC
X
VD
DV
SS
VEE
R534 10K
R535 10K
R537 10K
R531 10K
U5054051
131415121524
611109
3
16
8
7
X0X1X2X3X4X5X6X7
INHABC
X
VD
DV
SS
VEE
Lead Select
WilsonNetwork
2.5.5 Differential Amplifier and Slew rate limitA traditional 3-opamp gain stage (U507 and U508) is used to construct the differential amplifier. Thetopology is modified slightly with the addition of slew rate limiting (U509). The ECG signal is slew ratelimited to about 100V/sec. This is done to minimize distortion of the ECG trace in the presence or largepace pulses. The differential outputs of this stage are used as input to the RLD amplifier.
fVcc
fVee
E
fVee
fVcc
fVcc
E
fVcc
E
fVee
fVee
mux+
mux-
SingEnd Out
u508-2
diff-
u509
-4
U508-3
u501
-8
diff+
C5451000pF
+
-
U507AMC34002
3
21
84
R565121K
C543.047uF
R54610K
R54510K
C542220pF
R54410K
+
- U508AAD712
3
21
84
+
-
U507BMC34002
5
67
84
C5441000pF
R54710K
-
+ U509LMC7101
4
31
25
0.1% 0.1%
0.1%
Diff Amp and Slew Rate LimitDC Gain = 1
0.1%
2.5.6 Right Leg Drive Amplifier
The right leg amplifier performs two functions. First is to provide bias current to the input bufferamplifiers. Second, to reduce 60Hz interference (increase CMR). Patient Common mode signals areamplified and inverted, and this resultant signal used to drive the patient. Gain of the RLD amplifier at60Hz is maximized, while keeping the system gain stable. The RLD output is mux’d to the appropriatewire depending on the chosen input vector. For example, when looking at Lead I (LA-RA), the RLDsignal is switched to the LL buffer.
Appendix A 10/14/99
E
fVcc
E
fVeefVcc
fVee
Sw-RLD-LA
Sw-RLD-RA
Sw-RLD-RL
Sw-RLD-LL
To RL
To LL
To LA
To RADiff+
Diff-
RL-mux
C514-2
U503-2
U504
DG202CSE
31
1416
119
68
1345
2
15
10
7
S1IN1
S2IN2
S3IN3
S4IN4
V+V-GND
D1
D2
D3
D4
TP551
R52510K
+
-
U503AMC34002
3
21
84
R52851.1K
R5271K
TP552
C5140.1uF
R52610K
R51610K
RLD Amp
RLD Mux
2.5.7 High Pass and Gain StageThe signal from the output of the differential amplifier is AC coupled before a final stage of amplification.The High Pass Pole is set to less than 0.05Hz (a 3.3 second time constant). Large DC signals aresometimes present, for example, following a Leads Off condition. In order to quickly restore the baseline,a transistor switch (Q504,Q505) is used to change the AC pole time constant to 0.33 seconds. Op AmpU508 provides the final amplification prior to the A/D converter.
E
fVcc
E
E
fVeeE
An-ECG
Sw-MonBw
Diff-out U508-5
Q504-d
U508-6
Q504-g
ecg-hp
Q504-s
+
-
U508BAD712
5
67
84
Q5042N7002
3
1
2
R55173.2K
R553100K
R549110K
R5521K
C516.047uF
Q5052N7002
3
1
2
C5153.3uF
R55019.6K
R5481Meg C517
.01uF
High Pass (0.05Hz or 0.5Hz)2-pole low pass
Gain StageGain = 74
2.6 Temperature AmplifierThe temperature option of Atlas is designed to operate with YSI-400 series probes. This probe has anegative temperature coefficient, R@30C = 1815Ohms, R@40C = 1200Ohms. The temperature amplifieris configured as a non-inverting gain stage. The positive input to the amplifier is a 1.25V reference. Theoutput of the temperature amplifier is V = Ref*(1+Rfb/Rthermistor).
The A/D converter will digitize the An-Temp input, along with the reference voltage and ground. Thegain of the A/D can be calibrated from the reference voltage measurement, and any drifts in the referencevoltage or A/D gain are compensated.
Appendix A 10/14/99
E
E
fVee
fVcc
f+1.24V
+Clamp-Clamp
Patient-Temp
U608-3U608-1
Temp-In
D602BAV99L
1
3
2
C633.01uF
J601
CON2
12
R627 1.21K
R62451.1K
C635 .01uF
C634 .01uF
R6261K
R6251K
C6362200pF
+
-
U608AAD712
3
21
84
TemperatureAmplifier
TemperatureThermistor
0.1%
2.7 Impedance Respiration
2.7.1 OverviewImpedance respiration is accomplished by measuring a change of resistance across the patient’s chestduring breathing. The RA and LA electrodes (Lead I) are uses to acquire the respiration signal. A currentsource is driven through the patient, and the voltage developed across the patient is measured. The changein resistance caused by respiration is small, in the order of 1 Ohm. This small change must be measuredon top of a large baseline impedance, typically 100 to 1000 Ohms.
2.7.2 Signal Source – Current DriveAn AC current source is used as the input signal, a 34.8KHz square wave. The Power supply sync signal,at 76.8KHz, is transmitted across opto isolator U710. Flip Flop U701, configured as a divide by 2,converts this signal to a 34.8KHz. Current through the patient is about 150uA Pk-Pk, set by the output ofU710 (5V) and the circuit series impedance, 69K including cable resistance. The impedance of the patientis small (<2K) compared to the series impedance and has minimal affect on the magnitude of the drivecurrent. Diode clamps are used to protect the respiration circuits in the event of a Defibrillation pulse.
E
E
f+5V
Resp-Off
Right-Arm
+Clamp
Left-Arm
-Clamp
Resp-Clk
RespDr+
D702-3
D701-3 C701-1
RespDr-C702-1
+ C7194.7uF
D701MMBD1503A
1
3
2
C7021000pF
D702MMBD1503A
1
3
2R70431.6K
R70331.6K
C7011000pF
R7011.96K
R7021.96K
U701A74HC74
2
3
5
6
144
7
1
D
CLK
Q
Q
VCC
PR
GND
CL
RespirationDriveCircuit
Appendix A 10/14/99
2.7.3 Differential Amplifier and Peak DetectorThe AC current driven though the patient develops a voltage across the RA to LA electrodes. This signalis measured and amplified with the Differential Amplifier formed by U702A/B. This amplifier convertsthe differential voltage across the patient to single ended signal, with a gain of 16.8. Inverting this signal(U703A), and summing the original signal and inverted signal through the dual Diode D705 then forms asynchronous peak detector. Then, the voltage on C711 is the DC resistance seen across the RA to LAbuffer. This baseline resistance is digitized, and if the signal is too large (>2.5K), a Respiration Lead Faultmessage is displayed. Note that this circuit measurement includes the two 1K resistors in the EKG cableset. This 2K resistance is subtracted in software before determining a leads off condition.
E
fVee
fVcc
E
fVee
E
fVee
fVcc
fVcc
E
EE
E
Resp-DC
Left-Arm
Right-Arm
D605-C
+Clamp-Clamp
U702-6D
703-
1U70
3-2
U702-1
U702-2
U702-5D704-3
U702-3D703-3
U702-7
R7163.16K
+
-
U702B
AD7125
67
84
R7153.16K
R710464K
+
-
U703AAD712
3
21
84
R7121K
R71415.8K
D704MMBD1503A
1
3
2
R71115.8K
C707330pF
C706330pF
D703MMBD1503A
1
3
2
D705MMBD354LT1
1
3
2
R7131K
R7081.96K
+
-U702AAD712
3
21
84
R709464K
R7071.96K
C7110.1uF
R7173.16K
C720.047uF
R724196KRespiration
Diff Amp
2.7.4 Gain and FilteringThe DC content (baseline resistance) of the respiration signal is not needed, so the signal is next ACcoupled, and additional gain applied before digitization. Low pass filtering is performed at this stage toreduce high frequency noise outside the respiration signal bandwidth. A baseline-reset circuit (transistorswitch Q701) is used to quickly restore the high pass pole if excessive DC voltage is present, for examplefollowing a Leads-Off condition.
Appendix A 10/14/99
E
E
fVee
E
fVcc
E
E
Resp-Reset
An-Resp
Q701-d
Resp-AC
Q70
1-g
U703-6
U703-5
R722316
+
- U703BAD712
5
67
84
D706MMBD1503A
1
3
2
R720100K
C714.047uF
C7123.3uF
R71951.1K
R7231Meg
Q701MMBF4393L
23
1
C7130.1uF
R721316K
R718825K
B.W. = .06Hz to 16 Hz Gain =1000B.W. = 10Hz
D605-C
2.8 SpO2 CircuitsThe SpO2 transducer senses oxygen content of functional arteriolar hemoglobin through the use of light(red and infrared) passed through the sensor. The reflective characteristics of hemoglobin at thewavelengths used allow the pulse oximetry circuits to obtain changing saturation levels. This data is thenprocessed to obtain the oxygen saturation percentage and pulse rate.
Nellcor or Nonin Medical provides the SpO2 board (Nonin only for the model 621). The SpO2 boardincludes amplifiers and processing, and transmits serial data to the CPU board (Waveform data, SpO2%,and pulse rate). The Atlas monitor provides electrical isolation (power and data) for the SpO2 board. Notethat you must use Nonin probes with the Nonin SpO2 board, and Nellcor probes with Nellcor SpO2 board.
3 Non-Isolated circuits - A/D and Mux
3.1 A/D – grounded circuits
The A/D converter is designed by building a pulse width modulator (PWM) and a timer circuit. The PWMruns at a 1.2KHz rate, synchronized by the A/D sync signal (NIBP-ADC-Clock). A/D sync is low for52.1uSec, high for 781.25uSec. Component values are selected such that the integrator will ramp down4.7V, and ramp up 7.83V. The voltage at the integrator output (U601-1) is limited to about 5V[5V*(73.2/83.2) + Vdiode)]. Then, the integrator starts at 5V and ramps linearly down to 0.3V.
The analog input voltage to be digitized and the integrator output are the inputs to comparator U210. Theoutput of the comparator is low at the start of an A/D cycle, and switches high as the integrator rampdrops below the input voltage being digitized (see the timing diagram below). A/D conversion isaccomplished by measuring the width of the PWM output signal. The A/D timer runs at 25.175MHz, thenthe A/D resolution is about 21000 counts (over 14 bits). Note that since the output of the comparator islow at the start of the A/D cycle, a resistor divider is formed at the comparator input. This divider reducesthe Analog-In signal by 0.75% [464K/(464K+3.48K)].
Appendix A 10/14/99
NIBP-PWM-ADC
P+5V
P+5V
NIBP-ADC-Clock
P+5V
Analog-Input
U207-3
U210-3
U210-7
U208-3
U208-2
U208-1
D201-C
U209-Out U210-2
A
AA
A
P+12V
A
A
A
A
A
R237464K
C221.047uF
C220
.01uF
+C2184.7uF
C2241000pF
R23173.2K
R23210K
R2353.48K
C225.047uF
U207B74HCT00
4
56
14
7
R2333.48K
+
-U210MAX941
2
36
1
4
7
5
R2343.48K
C219.047uF
+
-
U208AMC34072
3
21
84
R23010K
U207A74HCT00
1
23
14
7
D201MMBD1503A
1
3
2
NIBPPWM A/DConverter
PWM A/DConverter
Analog In
(U207-3) 781uSec
52uSec
0.31V
PWM-timer
ComparatorInputs
PWM-Out(U207-6)
+5V
IntegratorInput -f=1.2KHz
3.2 A/D Mux – grounded circuitsAnalog signals are switched to the A/D converter through MUX U209. Control of the multiplexer isthrough a serial communication channel from the main CPU. The following signals are digitized:
12. +5V/2 Sampled version of the 5V supply. Used to verify A/D operation.13. SafetyPres Safety Pressure Transducer14. PrimaryPres Primary Pressure Transducer15. P.75V Reference voltage for A/D calibration.
0mmHg pressure for Primary Transducer.16. P4.25V Reference voltage for A/D calibration.
300mmHg pressure for Primary Transducer.17. Print-Temp Printhead Temperature, used to compensate printer strobe width.18. BattVoltage Battery Voltage, used to warn of low battery condition.19. BattCurrent: Battery Charger Current, used only in service mode verification.
4 NIBP Circuits
4.1 Overview - Safety:
Two pressure transducers are used, a primary and safety transducer. The primary is used to make all BPmeasurements. Hardware circuits monitor the output of the primary transducer, looking for overpressurefaults. In addition, Software monitors the digitized outputs of the primary transducer, and detectsoverpressure faults. The following overpressure faults are detected in software (monitored once persecond):
Appendix A 10/14/99
1. >=10mmHg pressure for 295 seconds2. >=15mmHg pressure for 175 seconds3. >295mmHg pressure for 0.5 seconds.
Software detected overpressure faults are considered application faults. The user is warned of a fault withan audible alarm and a ‘Check blood pressure cuff’ message on the CRT display. NIBP is not disabled forthis type of fault. In the event of a fault, the drive signals to the NIBP pump and valve are opened.
Two hardware faults are detected, pressure over 330mmHg (nominal trip point 314mmHg, and pressureover 15mmHg for three minutes (13.3mmHg nominal trip point). These faults are considered more serious(since software should have detected and corrected this condition). The user is notified with a ‘BPSYSTEM FAULT’ message, and NIBP is disabled. A redundant safety transistor is opened to ensure theNIBP pump is off and the valve is open.
The primary and safety transducer outputs are continuously digitized. The outputs of the transducers arechecked vs. each other, and if they disagree, an ‘NIBP Fault Message’ is declared and the NIBP system isdisabled. The outputs of the transducers are linearly proportional to the supply voltage (supply current forthe safety transducer). The transducers use unique reference voltages to ensure that a fault in onereference will not cause an equivalent gain error in both transducers.
The A/D also has redundant checks. Two reference voltages (derived from the primary transducerreference supply) are measured, and the A/D gain and zero is checked. In addition, a unique reference isdigitized, and compared vs. expected results. An error in any of these A/D measurements will again causean ‘NIBP Fault Message’, and the NIBP system will be disabled.
4.2 Primary Transducer - Amplifier:The primary pressure transducer is a fully calibrated and compensated transducer with built in voltageamplification. The output of the transducer is proportional to the supply voltage. With a 5V supply, theoutput of the transducer is:0mmHg = 0.5V.300mmHg = 4V.Op amp U204A is used to level shift the output of the transducer such that the nominal voltage for0mmHg is set to 0.75V. The CPU monitors the digitized zero pressure voltage, and any offset is corrected.This correction comes from the summation of an error correction signal through op amp U204B. The CPUwill output a pulse width modulated signal at 76.8KHz. This signal is RC filtered to provide ad DCvoltage at U204-5. This signal can adjust the offset seen at the A/D converter by +/-20mmHg.
Appendix A 10/14/99
P+5V
P+.75V
+3.3V
NIBP-Offset-DAC
PrimaryPres
P201-Out
U204-5
U204-2
U204-7
U204-3
P201-pwr
P201-6
U204-1
C207-1
A
P+12V
A
A
A
A
A
A
A A
A
P+12V
A
A
C232.047uF
C227680pF
C209.047uF
C228.047uF
R2175.62K
R213237K
L202
Bead
C226.047uF
R2363.83K
R21823.7K
+
-
U204BMC34072
5
67
84
C231.01uF
R24421.5K
C206.047uF
R215100K
R21256.2K
+
-
U204AMC34072
3
21
84
+C2081uF
R2191.96K
GainandComp
XFPM-050KPGR-P1P201
1
2
3
6
R21619.6K
R21410K
+ C2071uF
PWM D/A76.8KHz
0mmHG = 0.5V 300mmHG = 4.0V
PrimaryTransducer
Zero Adjust+/-20mmHg range
4.3 Safety Transducer - AmplifierThe safety transducer is compensated for temperature drift, but gain and zero are not calibrated. Thesafety transducer does not include built in voltage amplification. The safety transducer output is adifferential voltage, proportional to the supply current through the device.
The initial accuracy of the safety transducer is very loose, in the order of +/-50%. However, the drift overtime and temperature is very good. Then, it is necessary to calibrate the output of the safety transducer.This is done my measuring a know pressure, measuring the output of the safety transducer, and storingcalibration constants in NVRAM. A two-point calibration procedure is used. Calibration is done at thefactory, and can be recalibrated in the field if necessary.
4.3.1 Current Source:Op amp U205A is configured as a current source for the Pressure Transducer, with the current throughthe transducer set to 1.5mA. Nominal gain for the transducer is 300mmHg = 75mV.
4.3.2 Differential Amplifier and Offset Centering:The output of the safety transducer is a differential voltage, with a nominal gain of 0.25mV/mmHg, and azero pressure offset voltage of +/-25mV. The A/D converter has an input voltage range of 0.5V to 5V. It isnecessary to both add both signal gain and offset centering to the transducer output before digitization.
Op amp U206A/B is configured as a differential amplifier, with a voltage gain of 22.5. The output of thedifferential amplifier is offset by 1.2V (U205B).
Appendix A 10/14/99
5VRef
SafetyPres
P202-5
P202-Out+U206-1
U206-2
U206-7
U205-7
P202-Out-
P202-2U205-3
A
A
P+12V
P+12V
P+12V
A
A
A
A
A
A
A
P+12V
A
C212680pF
+
-
U205AMC34072
3
21
84
R22621.5K
R2251K
-+
FPNS-07PGRP2022
13
5
6
C216.047uF
+
-
U206BMC34072
5
67
84
+
-
U206AMC34072
3
21
84
+
-
U205BMC34072
5
67
84
C215.047uF
R2213.16K
R2221K
C211
.047uF
C213.01uF
TP226
R22321.5K
C214.047uF
R220806
C217
.047uF
R2275.11K
R2241K
ZeroOffset
SafetyTransducer
4.4 Hardware Overpressure:The output of the primary transducer is monitored for two overpressure conditions; pressures in excess of13.3mmHg (nominal) and 314mmHg (nominal) are detected. These error conditions are transmitted to thegate array on the CPU board, and if the error conditions are present for a long enough time period, a faultmessage is displayed, and NIBP is disabled (see above for safety performance operation).
The output of the Primary Transducer drives the two comparators U203A/B. The comparison voltage isderived through a resistor divider chain from a 5V regulator (U201). This regulator is the supply voltagefor the primary transducer, and sense the primary output is proportional to the supply voltage, toleranceerrors in the regulator are not critical.
P+12V+12V P+5V
P+.75V
NIBP-Overpressure
NIBP-15mmHg
P+4.25V
PrimaryPres
U203-5
U202-3
U202-5
U203-6
U203-3
U203-2
A
A
P+12V
A
A
+3.3V
A
A
A
P+12V
A
A
P+12V
A
AA
A
+3.3V
A
P+12V
+
- U203BLM393
5
67
84
R2111.96K
C203
.047uF
L201220uH
+C22910uF
R2081.96K
R207464K
R202174
+
-
U202AMC34072
3
21
84
C223.01uF
R2061K
+ C2024.7uF
C205
.047uF
+
-
U202BMC34072
5
67
84
C222.01uF
U20178L05
8 1
2 3 6 7
IN OUT
GN
D
GN
D
GN
D
GN
D
C201.047uF
R204150
C204.047uF
R201576
R2091K
+
- U203ALM393
3
21
84
R210464K
R205750
R2033.32K
Over PressureFault Circuit
Appendix A 10/14/99
4.5 Pump and Relay Drive:Two independent dual transistor switches, Q202 and Q203 control the pump and valve. Q202 iscontrolled by logic circuits on the CPU board, and is normally in the on state. Q202 is only opened in afault condition (over pressure, A/D calibration error, or transducer mismatch). Once a fault is detected,Q202 will remain open until power is cycled. Under normal operation, dual transistor Q203 is used toswitch the pump on and close the valve. The pump-on and valve-close commands are controlled bysoftware. Note that the valve is normally open. Then, in the case of no power, the valve will be in the openstate.
NIBP-Pump-OnNIBP-Valve-Close
NIBP-Safety
+5V +Vpump
Pump-
Valve-
Pump+
Valve+
Q201-B
Q202-GD
201-
A
+12V
Q203MMDF2N02E
81
2
5 67
3
4
R246
31.6
Q201MMBT3904L
31
2R243100K
R24110K
R24210K
D202BAV99L
1
3
2
R2481K
J201
CON5
12345
R2471K
R24010K
Q202MMDF2N02E
81
2
5 67
3
4
5 CRT Deflection Board
5.1 Overview:
Atlas uses a 5-inch monochrome CRT display. This CRT will display Waveform Data (ECG andRespiration or SpO2 orETCO2), plus Text Data (Heart Rate, Alarm Values, Trend Data, setup, andservice menus). The CRT Deflection board performs the following functions:
1. Vertical Deflection.2. Horizontal Deflection.3. CRT Grid Voltages.4. Video Amplifier.
CRT Deflection is magnetic, vertical and horizontal deflection is controlled by regulating current throughthe vertical and horizontal coils of the CRT Yoke. The Deflection board is designed to the followingspecifications:
Resolution: VGA (640X480)Dot Clock: 39.7nSec (1/25.175Mhz)Display Size: 100mm (Horizontal) X 68mm (Vertical)
Vertical: Scan Rate: 60HzReset Time: 750uSec
Appendix A 10/14/99
Blanking Time: 1.2mSec
Horizontal: Scan Rate: 31.5KhzReset Time: 5uSecBlanking Time: 5.7uSec
5.2 Vertical Amplifier:
5.2.1 Ramp Generator:
+12V+5V
VsyncRampU4.2
U1.2
d6.c
U1.3
C3.047uF
U4A
74HCT04
1 2
R43
5.11K
R521.96K
R27.50K
R11K
R323.7K
C1.1uF
D11N4148
12
D61N4148
12
+
- U1ATLC272
3
21
84
Ramp Generator
750uSec
16.7mSec
Vertical Sync
VerticalSync
16.7mSec
750uSec
3.95Vpp
5.0V
A ramp generator is built from the integrator (U1A, C1, and R3). The slope of the integrator is: V =(I*T)/C. The integrator is designed so that it ramps up 6.97V in 750uS and ramps down 3.95V in 15.9mS.Diode D1 clips the output voltage at about 5.0V (U1-pin3 + Vdiode). Then the ramp resets at 5.0V eachcycle, and integrates down 3.95V.
+5V
+5V
Ramp
q4.b
q3.b
u2.6
u1.5
u2.7
q1.b
vadj
q1.e
u1.6
u1.7
vcadj
vcadj-vcadj+
q2.b
u2.2
+12V+12V
+12V
+12V
Q1MPSW01A
32
1
R17 10
R15 38.3R20169+
-U2A
MC34072
3
21
8
4
R641.2K
R9
1.47K
+ C522uF
R410K
+
-U2BMC34072
5
67
8
4
Q4MPSW51A
32
1
R11
1.96K
C4.047uF R19
562
R18562
R741.2K
R2310K
R13169
+
-
U1BTLC272
5
67
8
4
R841.2K
C2100pf
R2210K
R10 1K
R542.2K
R21562
Q2MPSW51A
32
1
R16 10
Q3MPSW01A
32
1
R12562
R14562
L
Vertical Yoke
Vertical Amplifier
Size Adjust
Zero Adjust
Appendix A 10/14/99
5.2.2 Vertical Amplifier:
The Vertical amplifier will generate a linear current ramp of +/-200mA. The vertical amplifier is an H-Bridge type driver. Positive current flow (deflecting the beam above the centerline) is defined as currentfrom +12V to Q1 to Rsense through the coil to Q4 to Ground. The negative current path is from +12V toQ3 through the Coil to Rsense to Q2 to Ground.
The input to the vertical amplifier is the ramp voltage generated above. The objective of the vertical ampis to match the current through the vertical coil with the input ramp control voltage. Current through thevertical coil is monitored through the sense resistor, formed from R15, R16, and R17. Voltage across thesense resistor is measured with the differential amplifier U1B. This voltage is then used as the feedbackvoltage to the control opamp, U2A.
5.2.3 Zero Adjust:
The output voltage from the ramp generator is a ramp from 5.0V to 1.05V (nominal). The center of thisramp is 3.0V. Then, the output of the current sense diff amp must be offset by 3.0V. This is accomplishedwith the Zero Adjust Network, Resistors R9, R10, and R11. Vertical centering is then accomplished bywriting a pattern to the CRT, and adjusting R10 to center the display.
Size Adjust:
Adjusting the current through the Vertical Coil changes vertical deflection. The voltage across the senseresistor is:
Vsense = (Vramp-Voffset) / 1.02 (1.02 is the gain of the current sense diff amp)Current through the coil is equal to current through the sense resistor network.
Icoil = Isense = Vsense / RsenseThen, adjusting the value of the sense resistor will change the current through the vertical coil. Verticalgain is then accomplished by writing a pattern to the CRT, and adjusting R16 to set vertical deflection.
5.3 Horizontal Amplifier:
Current through the transformer increases linearly as Transistor Q6 is On (I = VdT/L). When thetransistor opens, the drain voltage kicks up, and the current through the Transformer coil flows throughC9, L2, L3, and the Horizontal Coil to Ground The transformer quickly loses flux (reset time < 5uSec).Current continues to flow in load inductance, from Ground through Q6-diode, C9, L2, L3, and theHorizontal Coil to Ground. This current flow charges capacitor C9. The current decreases linearly to 0,then changes directions. This is due to the AC coupling capacitor C9 being charged to a negative voltage.Current flow is then from Ground through the Horizontal Coil, L2, L3, C9, and Q6 to Ground.
The drive to MOSFET Q6 is AC coupled. This will prevent Q6 to be driven high in the event of a faultydriver on the CPU board.
In order to get adequate deflection current (about +/-2.3Amps), 18.5V across the transformer coil isnecessary. A “boost” winding is added to the transformer, then when the voltage on the transistor drainflys up, current flows into capacitor C11. C11 charges to a voltage determined by the turns ratio in thetransformer.
Appendix A 10/14/99
5.3.1 Horizontal Gain:
Horizontal deflection is adjusted by changing the current through the Horizontal coil. Changing the seriesinductance in the Horizontal Deflection Path modifies the current. Increasing Horizontal gain is thenaccomplished by writing a pattern to the CRT, and adjusting the “width coil”, L3.
Horizontal Centering:
Horizontal centering is accomplished by rotating magnets mounted on the CRT Yoke assembly.
5.3.2 Grid Voltages:
The following voltages are developed to bias the grids on the CRT:Grid 1: -10V to -50V DC (Brightness Adjust)Grid 2: 350VDCGrid 4: 0V to 350VDC (Focus Adjust)Anode: 7.5KV
These voltages are derived from additional windings on the FBT. In addition, the supply voltage for thevideo amplifier (+36VDC) is generated from a tap on the FBT.
+12V
+12V
+12V
+Vvid
Grid 2
Intensity
Hsync
Focus
+B
hwide
Vg2
d5.c
q5.c
C22-2
Vd
q6.d
Vg1
+12filt
Hor
Grid1
hlin
q5.b
d4.a
Boost
Q6IRF640
2
1
34
C15.01uF
R2710
L215uH
LHorizontal Yoke
D51N4937
1 2
U4B
74HCT04
3 4
C22.022uF
D31N4935
1 2
+ C1222uF
L1
47uH
Q52N3904
32
1
R2410K
C8.022uF
D2
MUR120
1 2
R30100K
C14.01uF
+C101000uF
C16.01uF
R29 100K
R25215
+
C13
22uF
To CRTAnodeT1
CRT-FBT
10
9
7
1
3
5
2
8
R261K
+C111000uF
R2819.6K
R501.96K
R322.5Meg
C96.8uF
D41N4935
12
C17.01uF
L315- 35uH
31.7uSec
Horizontal AmplifierGrid Voltages
5.5uSec
FocusAdjust
Horizontal Sync
BrightnessAdjust
Appendix A 10/14/99
5.4 Video Amplifier:
The CRT tube turns a dot on when video out is low (near 0V), and off when video out is high (+Vvid =28V). The input to the video amplifier is a digital signal (3.3V logic level) from the uProcessor. An inputof 0V turns the dot off, an input of 3.3V turns the dot on. Transistor Q7 amplifies and inverts this signal.Video out is driven low through D7, and driven high through emitter follower Q8. .
+Vvid
+5V
VideoIn
VideoOut
q8-b
q7-g
q8-e
u4-6
C19.01uFR37
1.96K
Q82N3904
32
1
R361.96K
R5119.6K
U4E
74HCT04
11 10
R48100
D71N4148
12
Q7BS170
12
3
R41681
Video Amplifier
6 Recorder Electronics
6.1 Overview:
Atlas includes a thermal strip chart printer (optional on Model 200 and 210, standard on model 220). Theuser can print either annotated waveform data or Patient trend information.
The printer specifications are:
Paper Size: 56 or 58mm (2 1/4 inches)
Printhead Width: 54mm (2 1/8 inches) Resolution: Vertical: 8 dots/mm, (200 dots/inch)
Horizontal: 12 dots/mm (300 dots/inch)
Chart Speed: 25mm/sec (1 inch/second)
The main CPU controls the printer. Data timing, clock signals, and strobe widths are all generated by theFPGA on the CPU board. These signals are buffered on the recorder board (inverter U5), beforetransmission to the printhead.
Appendix A 10/14/99
6.2 Power Supply – 24 Switcher
It is necessary to generate 24VDC for the print head and motor. The input to the 24V switcher is either12V from the AC/DC converter, or Battery voltage on the model 210/220 when AC is not present. Thecircuit is configured as a boost PWM using current mode feedback. The PWM controller is a UC3843A.The controller includes an internal 2.5V, 1% reference, and an external 5V, 1% reference. Nominaloutput voltage for the boost converter is Vout = [2.5V*(1 + 84.5K/10K)] = 23.6V.
The converter will run at duty cycles over 50%, which requires slope compensation for a current modecontroller. Slope compensation is added by summing in part of the oscillator signal with the current senseline.
The PWM current limits on a cycle to cycle basis. The supply will be in current limit when the Isense linereaches 1V. Current limit is set to about 3.5 Amps from 12VDC or 5Amps from battery.
Two control signals exist for the 24V switcher, n24Von and Rec-Supply-On. The 24V switcher is disabledwhen n24Von is high. This signal is controlled by the on board PIC processor. The switcher is held off atpower up, and allowed to start after 50mSec. This is done to reduce inrush current at power up. The signalRec-Supply-On enables power to the print head, and is controlled by the main CPU. Power is only appliedto the print head when the recorder is running.
RecVdc
RecVdc
+24V
n24VOn
+24V-switch
U2-
Isen
se
U2-Ref
U2-RT
Q6-e
U2-
out
Q4-
G
U2-comp
Rec-Supply-On Q2-b
Q4-D
U2-fb
Q4-s
A+5V
A
A
A
A
A
A
A
A
A
+12V
A
A
A A
R193.16K
+ C41000uF
TP8
C11.047uF
TP14
L122uH
TP17
R1619.6K
C7.01uF
R224.22K
R1310
C135600pF
Q4MTP30N06VL
23
1
4
R1410K
R170.1
R610K
TP10
Q32N7002
3
1
2
R1210K
TP19
+ C61uF
TP21
C142200pF
R115.11K
R18no-load
Q6MMBT3904L
3
1
2
R15147
TP23
Q2MMBT3904L
31
2
R910K
R1010K
TP9
D2MBRS340T3
U2UC3843A
3
57
14
1
10
812
911
VFB
ISENSERT/CT
VREF
COMP
OUT
PW
R-G
ND
Vcc
GN
DV
c
R784.5K
+ C81800uF
Q1MTP30P06V
2
1
34
R310K
PrintheadPowerSwitch
SwitcherDisable
ToPrinthead
ToMotorRecorder
PowerSupply
6.3 Motor Driver:
Atlas uses a stepper motor to drive the paper. The microcontroller (U3) is programmed to apply theappropriate phased signal to the motor. A quad darlington switch (U6) amplifies the signal from thecontroller to signal levels needed to drive the motor. Motor speed timing is derived from the main CPU,and transmitted to U3 on signal line U3-clk (U2-pin2).
Appendix A 10/14/99
U3-clk J3-1
u6-11
u6-clmp
J3-3
d6-c
U3-8
U3-10
n24Von u6-14 J3-4
J3-6
U3-9u6-3u6-6
U3-7
A
A
+24V+24V
+5V
DA
D627V
13
R331.47K
U6ULN2065
36
1114
27916
18
1B2B3B4B
1C2C3C4C
CLMP1CLMP2
C19.047uF
TP26
R351.47K
TP29
C18.047uF
TP1
J3
CON6
123456
R361.47K
TP67
+C2047uF
R341.47K
D127V
13
TP28
TP27
U3
PIC16C505
2
5
7
4
3
6
1 14
8
9
10
11
12
13ClkIn/Osc1/RB5
RC5/TOCK1
RC3
Vpp/MCLR/RB3
Clkout/Osc2/RB4
RC4
Vdd
Vss
RC2
RC1
RC0
RB2
RB1
RB0
+
4
Connector Pin #
+
43
+
1
+1phase +2
3
+
6
+
+
6.4 Temperature Amplifier:The printer will print darker as temperature is increased. Print darkness can adjusted by controlling thetime a dot is turned on. A thermistor is included on the printhead. This thermistor is nominally 30K, anddecreases as temperature increases. The output of the temperature amplifier is a function of the thermistorvoltage, Temp = .755*(1+R8/Rtherm). This voltage is digitized (on the main board), and the CPU cancompensate dot width in order to maintain consistent printing over temperature.
Thermistor1
Thermistor2
Temp
U1-1
U1-2
U1-3
A A
+5V
+5V
+5V
A
A
A
R151.1K
TP6
D3
BAV99L
1
3
2
C1.047uF
R21K
TP3
C5 .01uF
TP54
C3.01uF
R8 23.7K
R49.09K
C2.01uF
R51K
+
- U1AMC34072
3
21
84
ThermistorInput
PrintheadTemperatureAmplifier
Appendix B
Atlas Repair PartsPart Number Description
6200-43E SERVICE MANUAL620001-501 MAIN PCB ASSY - LOW END620004-501 ATLAS CPU PCB ASSY620007-501 FRONT PANEL DISPLAY PCB ASSY620013-501 PRINTER PCB620016-501 MAIN PCB ASSY - MID/HIGH END620032 ETCO2 PCB ASSY620034 ETCO2 CONNECTOR & CABLE620035 NELLCOR SPO2 BD620038 NELLCOR LABEL (CARTON)620105-1 BATTERY DOOR620117 PRINTER DOOR BUTTON620119 LATCH SPO2620125-501 MAIN CASE/HANDLE SET620126-6 BEZEL SET/HIGH HEAT TRANSFER620127 METAL BRACKET FOR PRINT 620131-1 MAIN FOAM620132-2 TOP FOAM620133 BP FOAM620134-501 GEAR ASSY620138-501 PRINTER DOOR ASSY620139-501 PRINTER FRAME ASSE620140-501 MAIN PRINTER ASSY620141 METAL HOUSING - TOP620142-1 METAL HOUSING-BOTTOM (LG)620143 NUT TEMPERATURE620144 BRACKET SPO2620148 GASKET CO2 EXHAUST620149 FITTING,1/16 X 1/8-27 NPT620150-1 AC/DC POWER SUPPLY620159 PRINT HEAD620165 CABLE-CONN TO MAIN BD,ECG620167 CABLE-MAIN BD TO DISPLAY BD620168-1 CABLE ASSY POWER SUPPLY620169-2 CABLE ASSY NELLCOR SENSOR620170 CABLE ASSY NELLCOR620171 CABLE ASSY SPEAKER620172-2 CABLE ASSY AC620173 CABLE-TEMP SENSOR TO MAIN 620175 CABLE ASSY - FAN620176 CABLE ASSY - PRINTER620177 CABLE ASSY - PRINT HEAD620178 CABLE ASSY SP02620182 LABEL - RS232620187-501 PNEUMATIC SUB ASSY620189 4-20 X 5/16 SLT/TORX PN PL ZIN620192 PNEUMATIC CONNECTOR (MACH)620193 NUT, HEX 5/16-32 X.095 PNEUM620194 WASHER,FLT.33 X.62 X.049 620197 BUSHING, SPLIT NYLON620198 FOOT620200-501 CRT SUB ASY
Page 1
Appendix B
Atlas Repair PartsPart Number Description
620201-501 POWER SUPPLY ASSY (LOW END)620201-502 POWER SUPPLY ASSY W/FAN620202-504 MAIN HSG ASSY W/BATT & PRNTR620205 4-40 X .31 TX PN MC ST ZN620207 NUT, M3-.5 HEX KEPS ST ZN620373-501 NONIN SUB ASSEMBLY620377-1 "NELLCOR WORKS HERE" LABEL620377-2 NELLCOR PATENT LABEL620378-1 ATLAS KEYPAD620378-2 ATLAS KEYPAD620378-3 ATLAS KEYPAD620378-4 ATLAS KEYPAD620378-5 ATLAS KEYPAD620378-6 ATLAS KEYPAD620379-501 MONITOR BOX W/INSERTS620385 SUB-LABEL DISPLAY620386 FASTON TAB620387 SHUNT620388-1 LABEL, NONIN SENSOR620388-2 LABEL, NELLCOR SENSOR620393 PWR SUPPLY INSULATOR LABEL620394-1 WASHER, SHOULDER PLATED620395-501 REPLACEMENT LAMP SUB-ASSY.620402 SPACER, DOOR620403 FLAT TIE HOLDER620524 CABLE-CO2 TO MAIN BD761077-1 TIE WRAP
Page 2
O
STEPPER MOTOR
PIC-
Vpro
gRe
c-Sup
ply-O
nNo
t Con
necte
dRe
c-Moto
r-Step
+5V
+12V
Rec-D
ata-L
atch
Rec-S
trobe
Rec-C
lock
Rec-D
ataGr
ound
Grou
ndRe
c+DC
VRe
c+DC
VRe
c+DC
VRe
c+DC
VRe
c+DC
VPr
int-T
emp
Rec-G
NDRe
c-GND
Rec-G
NDRe
c-GND
Rec-G
NDRe
c-GND
J3MODEL 'LOW' P3
LITHIUM BATTERY (+)LITHIUM BATTERY (+)
12
J2MODEL 'LOW' P2
LITHIUM BATTERY (-)LITHIUM BATTERY (-)
12
AC+1
2VAC
+12V
AC+1
2VGR
OUND
GROU
NDGR
OUND
+5V
KEY-
CLOC
KON
/OFF
-KEY
KEY-
LATC
H-N
+5V
KEY-
DATA
GROU
NDLE
D DA
TAAC
ON-L
EDLE
D-ON
GROU
NDGR
OUND
GROU
NDLE
D-LA
TCH-
N
PHAS
E 1
+24V
PHAS
E 2
PHAS
E 3
+24V
PHAS
E 4
GRNALL YELLOW
GRN
GRN
BLK
RED
RED
BLK
BLK
RED
ORN
YEL
GRNYEL
BLKWHT
GRNYEL
BLKWHT
BLK
RED
BLU
RED
ORN
RED
SHLD
GRN
COAX
BLK
WHT
ORN
RED
SHLD
GRN
COAX
BLK
WHT
RIBBON CABLE
RIBBON CABLE
RIBBON CABLE
FERRITE
BRN
RED
ORN
YEL
YEL
ORN
RED
BRN
GRN
BRN
BLU
RED
BLK
WHT
ORN
WHT
BLK
RED
BLKRED
ORNWHT
YEL
ORN
SHLD
GRN
COAX
BLK
RED
BLK
RED
YEL
GRN
BLKBLKBLK
REDREDRED
BLK
BLK
BLK
BLK
BLK
RED
RED
RED
ORNGRN
YELRED
BLKORNREDYELBRNREDBLK
5 POSITION JUMPER
5 POSITION JUMPER
6 POSITION JUMPER
FERRITE
FERRITE
ETCO
2-TX
(TO
J4-1
5)ET
CO2-
RX(T
O J4
-17)
GROU
ND+1
2V
J801
CABLE ASSYMOTOR ESD GROUND
CABLE ASSYPRINTHEAD ESD GROUND
Grou
nd
TO POWERSUPPLY CAN
Grou
nd
TO POWERSUPPLY CAN
MOTOR
CABLE ASSYPRINTER
CABLE ASSYNELCOR
CABLE ASSYTEMPERATURE CONNECTOR
LN G
J2 J3 J5 J6 J7 J8 J9
N/C
LED
DRIV
E LIN
ELE
D DR
IVE
LINE
N/C
PHOT
O DI
ODE
SIGN
ALSE
NSOR
TYP
E LIN
ECA
BLE
SHIE
LDSI
GNAL
SHI
ELD
PHOT
O DI
ODE
BIAS
1 2 3 4 5 6 7 8 9
YOKE AND CABLE ASSY
J2
CONT
ACT1
-REL
AYN/
CN/
CRG
NDRX TX RG
NDCO
NTAC
T2-R
ELAY
1 2 3 4 5 6 7 8
P2
P801
Mode
l 'MED
/HIG
H'
P4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60
GROU
NFEK
G-PW
M-AD
CNI
BP-S
AFET
YGR
OUNF
+3.3V
NIBP
-PW
M-AD
C+3
.3VGR
OUND
GROU
NDRS
232-
TXNI
BP-O
VERP
RESS
URE
PIC-
DATA
GROU
NDRS
232-
RXET
CO2-
TXSP
O2-T
XET
CO2-
RXSP
O2-R
XSP
ARE-
2 NC
ADC-
CLOC
KNI
BP-D
ATA
FE-C
LOCK
NIBP
-15m
mHg
SPI-D
ATA-
OUT
LED-
LATC
HSP
I-CLO
CKVI
DEO-
HSYN
CBA
TT-ID
SPAR
E-3 N
CFE
-DAT
APO
WER
-SYN
CRE
C-MO
TOR-
STEP
VBAC
KUP
GROU
NDNI
BP-V
ALVE
-CLO
SEPI
C-CL
KVI
DEO-
VSYN
CSP
EAKE
R-AU
DIO
NIBP
-OFF
SET-
DAC
N/C
AC-O
NNI
BP2-
PW-A
DC (u
nuse
d)N/
CGR
OUND
GROU
NDVI
DEO-
DATA
KEY-
LATC
H-N
GROU
NDRS
232-
CTS
NURS
E-CA
LLRE
C-CL
OCK
REC-
DATA
-LAT
CHRE
C-DA
TARE
C-ST
ROBE
HRES
ETSC
LSP
I-DAT
A-IN
SDC
GROU
NDGR
OUND
YOKE
HORIZONTAL -HORIZONTAL +TUBE GROUNDVERTICAL +VERTICAL -
12345
J2P2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
PRINT HEAD
RIGH
T-AR
MLE
FT-A
RMLE
FT-L
EGGR
OUND
V-LE
ADRI
GHT-
LEG
1 2 3 4 5 6
ECG
BATT
ERY
BATT
EY-ID
GROU
ND
1 2 3
L N GND
13
CABLE ASSYAC RECEPTACLE
CABLE ASSYCO2
CABLE ASSYNONIN SENSOR
CABLE ASSYNONIN
A/CRECEPTICLE
VALVE
PUMP
CABLE ASSYSPEAKER
CABLE ASSYPOWER SUPPLY
CABLE ASSYFAN
CABLE ASSYPUMP/PNEUTRONICS VALVE
+12VGround
12
1 2 3 4 5 6
CABLE ASSEMBLYPRINT HEAD
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
1 2 3 4
+12V
GROU
NDET
CO2-
Rx(T
O J4
-17)
ETCO
2-Tx
(TO
J4-1
5)
f+V SGND
sSpO
2Tx
SGND
1 2 3 4
VALVE +VALVE -NCPUMP +PUMP -
12345
AC+12VAC+12VAC+12VGROUNDGROUNDGROUNDGROUND
1234567
SPN/CSM
123
WAT
ER T
RAP
SWIT
CHGR
OUND
1 2
1 2 3 4 5 6 7 8 9 10 11 12 13 14
FERRITE
CABLE ASSYDISPLAY
CABLE ASSYBATTERY
FUSE
1 2 3 4
J1 J4 J15
J17
1 2 3 4
ANODE
- +BATTERY
SPEAKER
FAN
SPO2 NONIN CONNECTOR
SPO2 NONIN BOARD
CO2 BOARD
SILENCEBOARD
DISPLAY BOARD 2
CPU BOARD
DEFLECTION BOARD
RECORDER BOARD
DISPLAY BOARD
MAIN BOARD
POWER SUPPLY
CABLE ASSYECG
PIC-
VPRO
GRE
C-SU
PPLY
-ON
N/C
REC-
MOTO
R-ST
EP+5
V+1
2VRE
C-DA
TA-L
ATCH
REC-
STRO
BERE
C-CL
OCK
REC-
DATA
GROU
NDGR
OUND
REC+
DCV
REC+
DCV
REC+
DCV
REC+
DCV
REC+
DCV
PRIN
T-TE
MPRE
C-GN
DRE
C-GN
DRE
C-GN
DRE
C-GN
DRE
C-GN
DRE
C-GN
D
+5V
KEY-
CLOC
KON
/OFF
-KEY
KEY-
LATC
H-N
+5V
KEY-
DATA
GROU
NDLE
D DA
TAAC
ON-L
EDLE
D-ON
GROU
NDGR
OUND
GROU
NDLE
D-LA
TCH-
N
FERRITE
ANOD
E (D
ETEC
TOR)
N/C
N/C
CATH
ODE
(DET
.SHI
ELD)
GROU
ND (R
CAL r
eturn
)RC
AL-L
EDN/
C+L
EDGR
OUND
1 2 3 4 5 6 7 8 9 10
1 2 3 4 5 6 7 8 9 10 11 12 13 14SPO2 NELCOR BOARD
CABLE ASSYNELLCOR SENSOR 1 2 3 4 5 6 7 8 9
RCAL
+LED
-LED
M/C
ANOD
E (D
ETEC
TOR)
GROU
ND (R
CAL R
ETUR
N)GR
OUND
N/C
CATH
ODE
(DET
SHI
ELD)
SPO2 NELLCOR CONNECTOR
J1
MODE
L MED
/HIG
H
J3
J4
J5
J6
J7
J8
J402
J401
J501 J601
J201
J11
1 2TE
MP-IN
GROU
ND
TEMP
1 2 3 4 5 6 7 8 9 10 11 12 13 14
SGND
SGND
SGND
SPO2
-RES
ETSG
NDN/
CS-
5VSS
pO2-
TXN/
CS+
5VSG
NDSG
NDIS
O+5V
digSG
ND
CO2RECEIVER
ETCO2 CONNECTORWITH SWITCH
+12V
VIDE
O-VS
YNC
VIDE
O-HS
YNC
GROU
NDVI
DEO-
DATA
GROU
ND
1 2 3 4 5 6 7 8 9 10 11 12 13 14
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
+24V
-SW
ITCH
+24V
-SW
ITCH
THER
MIST
OR-1
THER
MIST
OR-2
STRO
BEGR
OUND
GROU
NDGR
OUND
GROU
ND+5
VST
ROBE
LATC
HCL
OCK
DATA
+24V
-SW
ITCH
+24V
-SW
ITCH
1 2 3 4 5 6
P401
P402
P1
P5
P11
P201
P7
P8
P6
P3
P2
P601
P501
INTENSITY+12VVIDEOGROUNDGRID 2FOCUS
123456
J3P3
+5VSILENCE-LEDSILENCE-SWITCHGROUNDGROUND
12345
J3 P3
TRENDLEAD-SELECTPRINTACON-LEDGROUND
12345
J2P2
CABLE ASSYSPO2 ESD GROUND
PHASE 1+24VPHASE 2PHASE 3+24VPHASE 4
123456
J3 P3
1 2 3 4 5 6
N/C
N/C
+5V
GROU
NDRX TX N/
CN/
C
1 2 3 4 5 6 7 8J10-
Mode
l 'LOW
'
SGND
1J4
03P4
03
IN-LINE FUSE
GNDATTACHED TO PS CANWITH SCREW
GND ATTACHEDTO PCA WITHFASTON
GNDATTACHED TO SPO2 BRACKETWITH SCREW
SGND
SGND
SGND
SPO2
-RES
ETSG
NDN/
CS-
5VSS
pO2-
TxN/
CS+
5VSG
NDSG
NDIS
O+5V
DIG
SGND
+24V
-SW
ITCH
+24V
-SW
ITCH
THER
MIST
OR-1
THER
MIST
OR-2
STRO
BEGR
OUND
GROU
NDGR
OUND
GROU
ND+5
VST
ROBE
LATC
HCL
OCK
DATA
+24V
-SW
ITCH
+24V
-SW
ITCH
N/C
LED
DRIV
E LIN
ELE
D DR
IVE
LINE
N/C
PHOT
O DI
ODE
SIGN
ALSE
NSOR
TYP
E LIN
ECA
BLE
SHIE
LDSI
GNAL
SHI
ELD
PHOT
O DI
ODE
BIAS
P2
X3 RELEASE TO PRODUCTION - - - -
JB ENGEL 07/21/99
- - -
- - -
- - INTERCONNECTDIAGRAMPRO-E
ME-10
620396 X3NONE SHEET 1 of 1
B
CKDDATEINITECN/ECODESCRIPTIONREV
REL TO PROD
APPROVED
THESE DRAWINGS AND SPECIFICATIONS AR E THE PROPERTY OF WELCH ALLYN, INC.AND SHALL NOT BE REPRODUCED, OR COPI ED, OR USED AS A BASIS FOR MANUFACTU REOR SALE OF EQUIPMENT OR DEVICES WITH OUT WRITTEN PERMISSION.
TRANSLATED FROM:CAD SOFTWARE:
SCALE
REVDRAWING NO.
TITLE
FINISH:
MATERIAL:
DATE
DATE
DATEDRAWN
F
E
D
C
A
2345678
B
1
7 6 5 4 3 2 18
F
E
D
C
B
A
TOLERANCES.XX = ` .02.XXX = ` .005ANGLES ` 2
DIMENSIONS ARE IN INCHES
UNLESS OTHERWISE SPECIFIED
TM
Atlas Drawings and Schematics
Drawing Number Rev. Sheet No. Size Name Description620002 C 1of 6 C Main Board - Model 200 Schematic620002 C 2 of 6 C NIBP Electronics Schematic620002 C 3 of 6 C Power Supply DC/DC Schematic620002 C 4 of 6 C Power Isolation and Sp02 Interface Schematic620002 C 5 of 6 C ECG AMP Schematic620002 C 6 of 6 C ECG A/D Interface Schematic620005 C 1 of 6 C Atlas CPU Sub System Connector/Header Detail Test Points620005 C 2 of 6 C FPGA U7 Detail620005 C 3 of 6 C I/O Filters Schematic620005 C 4 of 6 C Flash, SDRAM 8 HRESET Config Word Schematic620005 C 5 of 6 C Power PC MP C823 CPU Schematic620005 C 6 of 6 C Power Distribution Schematic620008 B 1 of 5 C Front Panel Display Board Schematic620008 B 2 of 5 C Keyboard Scanner Schematic620008 B 3 of 5 C Temp/Pulse LED Drivers Schematic620008 B 4 of 5 C NIBP LED Drivers Schematic620008 B 5 of 5 C Sp02 LED Drivers Schematic620011 C 1 of 1 C CRT Deflection Board Schematic620014 B 1 of 1 C Printer Electronics Schematic620017 D 1 of 8 C Main Board - Model 220 Schematic620017 D 2 of 8 C NIBP Electronics Schematic620017 D 3 of 8 C DC/DC Power Supply Schematic620017 D 4 of 8 C Power Isolation and Sp02 Interface Schematic620017 D 5 of 8 C ECG AMP Schematic620017 D 5 of 8 C ECG A/D Interface Schematic620017 D 7 of 8 C Respiration Schematic620017 D 8 of 8 C Serial Communication Schematic620020 A 1 of 1 C Transformer Isolator Component Schematic620027 B 1 of 1 C ECG Patient Cable Component Schematic620201 A 1 of 1 C Power Supply Sub Assembly Exploded View of Sub Assembly620032 B 1 of 1 B ETC02 PCB Assembly Isometric View of ETCO2 PCB620150 B 1 of 1 B Power Supply 50W Performance Specification
620154/1255210 B 1 of 1 B Assy, Nonin Sp02 Board with Shield Code for Rev Level of Firmware/Software620152 A 1 of 1 B Motor Stepper Motor Schematics and Values620156 B 1 of 1 B Pump, Pneumatic Valves620165 A 1 of 1 B Cable Assembly ECG Cable Pinout620166 C 1 of 1 B Cable Assembly CO2 Cable Pinout620169 C 1 of 1 B Cable Assembly Nellcor Sensor Cable Pinout620187 B 1 of 1 B Pneumatic Sub Assembly Exploded View of Pneumatic Sub620524 A 1 of 1 B Cable Assembly CO2 Cable Pinout
Page 1
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
AC/DC PowerConnector
Front PanelDisplayConnector
Main PCAConnector
BackupBattery
RecorderBoardConnector
CRT BoardConnector
3V Lithium
Speaker Drive
SerialDataOut
4Vpp max.
NIBP - Page 2
Serial I/Oconnector
Model 200 Serial I/O
(manufacturing test
only)
FanConnector
Page3
Page2
Page1
Rick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
620002.dsn
5-39118 JAC 3/15/99 LPP
L.Phillips
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/17/99
B See ECN worksheetACminimumload
RecorderESD Ground
C Improvements for ESDand Fast Transients
5-39456 4/27/99LPP LPP
5-39822 LPP LPP6/23/99
DMods to U2 clock line,NVRAM pullup
Jumper wirefrom J4-20 toJ4-55
5-39934 LPP 7/9/99
620002 D
Main Board - Model 200
C
1 6Friday, July 09, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
U7-wc
FE-Data
R17-1
Power-SyncSpare-3
NIBP-15mmHg
Spare-2
+3.3V
FE-Data
ETCO2-Tx
Video-Data
SCD
SPO2-Tx
NIBP-Safety
SCD
Video-Data
HRESET
NIBP-OP
Video-VSync
Video-HSyncVideo-VSync
Video-HSync
NIBP-PWM-ADC
NIBP-Valve-Close
NIBP-Offset-DAC
Vbackup
ETCO2-Rx
Batt-ID
Power-Sync
EKG-PWM-ADC
Q1-e
PIC-Clk
PIC-Data
NIBP2-PW-ADC
Q2-c
q4-d
Q2-b
Nurse-Call
LED-Latch-b
SPO2-Rx
U8-6
RS232-RX
SM
FE-Clock
U9-3
LED-Data-b
Audio-Shutdown
Rec-Data
NIBP-Data
RS232-Rx
U8-5
LED-Latch
LED-Latch
ADC-Clock
Rec-Strobe
Audio-Shutdown
Key-Data
Tx
Rec-Data-Latch
Rec-Supply-On
U9-4
Rec-Motor-Step
Rec-Clock
EKG-ADC-Clock
SP
Rec-Motor-Step
EKG-Data-Clock
RS232-Tx
Rx
U8-4
Rec-Strobe
Rec-Data
Key-Latch-n-bKey-Clock-b
SPO2-Rx
AC
ON
-LE
D
U8-2
U8-1
Rec-Clock
SPI-data-in
Rec-Data-Latch
U8-3
EROM-wr
LED-On
Speaker-Audio
SCL
Key-Latch-n
Key-Clock
SPI-Data-Out
LED-Data
SPI-Clock
Key-Latch-n
LED-On
Vbackup
Rec+12V
FE-PWM-ADC
FE-ADC-Clock
FE-Data-In
+12V
+12V
Print-Temp
Rec-GND
filt+12V
ACON
NIBP-15mmHgNIBP-Safety
NIBP-PWM-ADCNIBP-Offset-DAC
NIBP-ADC-Clock
NIBP-Overpressure
NIBP-A/D-SelA
SpO2OutNIBP-Valve-Close
NIBP-Pump-On
NIBP-A/D-SelBNIBP-A/D-SelC
FE-Pwr-Sync
PIC-Clk
ac-on
+12V
LithMeas
+3.3V
U2-ResetBackupBattery
AC+12V
Rec+12V
Rec-GND
HRESET
PIC-Data
PIC-Vprog
Rec-clock
Rec-Data
On/Off-Key
ac-on
+5V
Speaker-Audio
FE-Data-Clock
Rec-GND
+5V
+5V
+5V
+5V
+3.3V
A
D
D
D
D
D
D
D
D
D
D D
D
D
D
D
D
DD
D
D
DD
+12V
+5V
D
D
D
D
D
D
D
D
+3.3V
D
D
+5V
D
+5V
+5V
+5V
+5V
+5V+5V
+5V
+5V
+5V
+5V
D
+3.3V
D
J1
CON7
1234567
C3220pF
J9
Tab-.187
12
U1B74HCT04
3 4
147
U3B74HCT08
4
56
147
R2210K
C320.1uF
C370.1uF
U1C74HCT04
56
147
+ C7330uF
+ C4330uF
C33
0.1uF
+
-
U9TPA301
3
4
1 672
8
5
Q32N7002
3
1
2
TP8
TP7
R2110K
J4
Socket 30x2
13579
11131517192123252729313335373941434547495153555759
24681012141618202224262830323436384042444648505254565860
1357911131517192123252729313335373941434547495153555759
2468
1012141618202224262830323436384042444648505254565860
U3C74HCT08
9
108
147
R21.96K
TP18
R1919.6K
R410K
J8CON14AP
135791113
2468
101214
+++++++
+++++++
TP9
J7
CON24B
123456789101112
131415161718192021222324
U274HCT595
14
1110
1213
151234567
9
168
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
VC
CG
ND
TP10
C22.047uF
TP17
C39.047uF
J6
CON6
123456
C8.047uF
TP23
U3A74HCT08
1
23
147
+
C364.7uF
C1.047uF
Q2MMBT3904L
3
1
2
C14.047uF
U1A74HCT04
12
147
TP16
C20.047uF
U3D74HCT08
12
1311
147
R151.96K
J5
CON2
12
C23.047uF
BT1BR-2/3A
C29.047uF
R163.48K
TP15
TP19
TP1
TP14
TP13
TP2
J11
CON3
123
TP22
J10
RJ-45
12345678
TP12
TP3
TP20R310K
TP11
TP4
TP21
C340.1uF
R5 1.21K
R110K
U1F74HCT04
13 12
147
J3
CON2
12
C38220pF
R6 1.21K
U8SP232ACN
129
1110
134526
138147
1615
R1OUTR2OUTT1INT2IN
C+C1-C2+C2-V+V-
R1INR2IN
T1OUTT2OUT
VC
CG
ND
Q1MMBT3906L
3
1
2
J2
CON2
12
R2310K
U1D74HCT04
9 8
147
+
C3010uF
U1E74HCT04
11 10
147
C5 .047uF
U7AT24C02N-10SC-2.7
123
6
7
5
84
A0A1A2
SCL
WC
SDA
VC
CG
ND
TP25
R7150
Q4
2N7002
31
2
TP5
+
C354.7uF
R1719.6K
R18619
C310.1uF
C2.047uF
TP6
TP24
R20215
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
+6V Buck(5.68V nominal)
On/Off Switch
Page 1
Rick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
620002.dsn
5-39118 JAC 3/15/99 LPP
L.Phillips
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/17/99
B See ECN worksheet
C Improvements for ESDand Fast Transients
4/27/995-39456 LPP LPP
5-39822 LPP LPP6/23/99
Mods to U2 clock line,NVRAM pullupD 5-39934 LPP 7/9/99
REV Description ECN/ECO Init Date Ckd
A Release to Production
620002 D
Power Supply - DC/DC
C
3 6Friday, July 09, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
U30
1-ou
t
Q30
3-b
U301-fb
Q303-c
C311-1
Q304-e
U301-osc
U301-5
U301-comp
Q305-g
u304-fb
up-reset
PIC-audio
Q305-s
d304-1
d304-2Q30
1-G
C328-1
On-Off
Q302-B
ACON
5Vref
+5V
+6V
+3.3V
filt+12V
+12V
Vb
VBackup
BackupBattery
PIC-Clk
Speaker-Audio
HRESET
U2-Reset
PIC-Vprog
Rec-Data
Rec-Clock
On/Off-Key
PIC-Data
AC+12V
D
D
D
D D
D
D
D
D
D
DD
TP312
U302LM2940CT-5.0
1 3
2
IN OUT
GN
D
R31310
U303LF33CV
1 3
2
IN OUT
GN
D
C305.01uF
R30910K
+ C31610uF
D304MMBD354LT1
1
3
2
+ C3234.7uF
D301BAV99L
1
3
2
Q3062N7002
3
1
2
C320.047uF
+ C3244.7uF
TP308
+ C306330uF
+ C314330uF
Q304MMBT3904L3
1
2
R3101.96K
TP301
TP315
C307.047uF
+ C319100uF
R319 19.6K
TP304
R302100K
C322.047uF
+ C3021uF
R316100
R30151.1K
R314100
Q302MMBT3904L
3
1
2
TP306
TP313
TP302
+ C304330uF
L30247uH
Q303MMBT3904L
3
1
2
C303.01uF
Q305MTP23P06V
2
1
34
TP309
TP317
C3112200pF
U301UC3843A
3
57
14
1
10
812
911
VFB
ISENSERT/CT
VREF
COMP
OUT
PW
R-G
ND
Vcc
GN
DV
c
TP316
R305100K
U304
LP2951CD-3.3
873
62
15
4
VINFDBKSHTDN
TAPSENS
VOUTERR
GN
D
TP305
R31810K
R3077.5K
R320 1.62K
R3121.96K
D303
MBRS340
R304127K
TP26
C321.047uF
U305
D620361-MX10000
2
5
7
4
3
6
1 14
8
9
10
11
12
13ClkIn/Osc1/RB5
TC5/TOCK1
RC3
Vpp/MCLR/RB3
Clkout/Osc2/RB4
RC4
Vdd
Vss
RC2
RC1
RC0
RB2
RB1
RB0
R31110K
R30310K
C325.047uF
TP303
TP320
+ C3151uF
R30610K
Q301
MTP23P06V
2
1
34
C313.047uF
TP321
TP27
TP310
C317.047uF
C3102200pF
TP318
L30147uH
R30827.4K
+C3011000uF
C326.047uF
TP319
TP307
D305NO LOAD
1
3
2
C327.047uF
+C3281uF
C309.047uF
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
A/D Mux
Zero Adjust+/-20mmHg range
0mmHG = 0.5V 300mmHG = 4.0V
PWM D/A76.8KHz
PrimaryTransducer
NIBP PWMA/D Converter
ZeroOffset
SafetyTransducer
Over PressureFault Circuit
Rick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
620002.dsn
5-39118 JAC 3/15/99 LPP
L.Phillips
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/17/99
B See ECN worksheet
C Improvements for ESDand Fast Transients
LPP LPP5-39456 4/27/99
6/23/99LPP LPP5-39822
Mods to U2 clock line,NVRAM pullupD 7/9/99LPP5-39934
620002 D
NIBP Electronics
C
2 6Friday, July 09, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
D201-C
U208-2
U210-7
U204-7
U204-5
U203-3
U203-5
C207-1
U204-3
U204-2
U205-7
U206-6
U206-1
P202-Out-U206-7
U206-2
U202-3
P202-2
P202-5
Q202-G
Q202-D
U202-5
U208-1
u207-9
PrimaryPres
P4.25V
SafetyPres
U208-3
P201-Out
P201-6
U204-1
U208-7
U209-Out
U203-6
P202-Out+
U210-2
U210-3
U203-2
Pump+
D20
1-A
Q201-B
Valve-Valve+
Pump-
P.75V
+5V/2
U205-3
U207-3
P201-pwr
P+5V
NIBP-Offset-DAC
NIBP-Pump-On
NIBP-ADC-Clock
P+5V
P+5V
P+5V
P+.75V
NIBP-Safety
P+5V
P+5V
P+5V
NIBP-PWM-ADC
NIBP-Valve-Close
P+12V
5VRef
P+5V
NIBP-Overpressure
NIBP-15mmHg
NIBP-A/D-SelB
P+5V
+12V
+5V
P+.75V
+6V
NIBP-A/D-SelA
NIBP-A/D-SelC
LithMeas
P+5V
Print-Temp
P+12V
P+12V
P+12V
P+12V
P+12V
+5V
+5V
P+12V
P+12V
P+12V
P+12V
P+12V
P+12V
+12V
P+12V
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
+
- U203ALM393
3
21
84
C215.047uF
+
-
U202AMC34072
3
21
84
C225.047uF
C2241000pF
TP214
R2333.48K
+
-
U208AMC34072
3
21
84
TP206
R2213.16K
C213.01uF
Q202MMFT2N02EL
23
1
4
R23210K
+ C2024.7uF
R24210K
R23010K
C222.01uF
+
-
U205BMC34072
5
67
84
R23173.2K
TP217
Q201MMBT3904L
3
1
2
+
-
U206BMC34072
5
67
84
C223.01uF
TP225
D202BAV99L
1
3
2
R24010K
R2353.48K
R2291.96K
+
- U203BLM393
5
67
84
R24110K
R237464K
D201MMBD1503A
1
3
2
L201220uH
TP228
C220
.01uF
R243100K
+
-
U202BMC34072
5
67
84
Gain
and
Comp
XFPM-050KPGR-P1P201
1
2
3
6
TP207
U207B74HCT00
4
56
147
TP231
TP210
+
-U210MAX941
2
3
61 4
7
5
TP211
TP201
C201.047uF
+C22910uF
TP237
C212680pF
TP240
TP232
C221.047uF
TP204
TP234
C205
.047uF
R21410K
C228.047uF
C209.047uF
TP226
C232.047uF
R2191.96K
C211
.047uF
R24631.6
C226.047uF
C216.047uF
R215100K
U207A74HCT00
1
23
147
C204.047uF
TP221
C227680pF
TP222
+C2081uF
R21619.6K
+
-
U204BMC34072
5
67
84
U20178L05
8 1
2 3 6 7
IN OUT
GN
D
GN
D
GN
D
GN
D
R2391K
+
-
U204AMC34072
3
21
84
R201576
C203
.047uF
TP235
TP224
R2033.32K
R205750
C231.01uF
C210.047uF
TP212
TP208
R24438.3K
TP213
C206.022uF
R2481K
TP215
R2491K
TP220
L202Bead
+
-
U208BMC34072
5
67
84
R2275.11K
TP219
J201
CON5
12345
R2363.83K
R22321.5K
R2221K
U207C74HCT00
9
108
147
R228
1.96K
R2241K
C230.047uF
U207D74HCT00
12
1311
147
TP236
R2251K
+
-
U205AMC34072
3
21
84
TP202
R2111.96K
R22621.5K
R2081.96K
C217
.047uF
-+
FPNS-07PGRP2022
13
5
6
+C2184.7uF
C219.047uF
TP209
R204150
R21823.7K
R202174
+ C2071uF
R2175.62K
R21256.2K
R2343.48K
+
-
U206AMC34072
3
21
84
R213237K
Q203MMDF2N02E
81
2
5 67
3
4
R2091K
TP227
TP216
R207464K
TP229
R220806
R210464K
U2094051
131415121524
611109
3
168 7
X0X1X2X3X4X5X6X7
INHABC
XVD
DV
SS
VE
E
TP233
TP238
TP203
R2061K
TP230
TP218
C214.047uF
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
IsolationBarrier
Isolated SpO2Circuits
Grounded SpO2Circuits
Rick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
620002.dsn
5-39118 JAC 3/15/99 LPP
L.Phillips
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/17/99
B See ECN worksheet
SpO2 ESDGround
C Improvements for ESDand Fast Transients
LPP LPP4/27/995-39456
6/23/99LPP LPP5-39822
Mods to U2 clock line,NVRAM pullupD 7/9/99LPP5-39934
620002 D
Power Iso and SpO2 interface
C
4 6Friday, July 09, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
T401-8
U402-1
C409-1
T401-4
T401-1
Q40
1-g
U402-sen
iso401-a
Q40
2-e
Q401-s
U401-1U401-2
U401-7
sSpO2tx
Q403-e
sSpO2tx
U401-5
U402-e
U402-ref
U402-ctU402-rt
iso402-a
U403-7
C421-1
U401-3
C408-2
iso401-b
opto-fb
u411-6
FE-Pwr-Sync
SpO2Out
+5V
filt+12V
+12V
iso+5Vdig
fVcc
fVcc
f+5V
+5V
fVcc
fVee
iso+5Vdig
iso+5Vdig
fVcc
S
S
S
S
S
iso+5Vdig
S
S
S
S
S
S
S
S
EED
ED
ED
S
SS
S
S
S
C4231000pF
J403
Tab-.187
12
TP424
TP402
R405215
C404.047uF
C409470pf
TP408
R4146.19K
C4112200pF
TP419
TP406
C401.047uF
R4209.09K
TP421
TP413
Q401MTD3055V
23
1
4
J401
CON4
1234
+ C418
4.7uF
TP412
TP407
C416.047uF
+C4151uF
R415100
TP422
TP409
R419215
+
-U401BMC34072
5
67
84
C403.047uF
C421470pf
R41710K
+C406100uF
R412511
+C407100uF
R404
316K
TP401
+
-
U401AMC34072
3
21
84
D401
MBRS130T3
TP415
TP420
+C405100uF
TP404
D403
MBRS130T3
TP405
C402.047uF
C420.047uF
R4115.11K
R40710
TP416
U403LP2951C
873
62
15
4
VINFDBK
SHTDN
TAPSENS
VOUTERR
GN
D
D405BAV99L
1
3
2
R4031K
R40110K
R4095.11K
TP411
+ C41910uF
C417680pf
R408100
R4185.11K
C410.01uF
TP423
C413.047uF
R4060.2
C414.047uF
C422.047uF
TP403
R41010K
U4104N25
1 6
2
5
4
TP414
U402
LM3524DM
12
16
15
945
10
67
12111314
3
8
V-V+
VREF
VIN
COMP+SENSE-SENSE
SHTDWN
RTCT
CAEACBEB
OSCOUT
GN
D
+ C41210uF
Q402MMBT3906L
3
1
2
C408.01uf
T401
IsoXfmr
5
8
1
2
3
4
R40210K
Q403MMBT3904L
3
1
2
R41610K
R42110K
U411HCNW4503
2
3
8
6
5
TP417
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
0.1%
0.1%
0.1%
0.1%
0.1%
0.1%
0.1%
0.1%
0.1%
0.1%
Defib ProtectRFI Filtering
Input BuffersGain = 9.26
WilsonNetwork
Lead Select
Diff AmpGain = 1
High Pass (0.05Hz or 0.5Hz)Low Pass (150Hz)
Gain StageGain = 74
RLD Amp
A/D InputsLeads Off
U501 U502 U503 U504 U505 U506 U507 U508
Shield0.1% 0.1%
Rick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
620002.dsn
5-39118 JAC 3/15/99 LPP
L.Phillips
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/17/99
B See ECN worksheet
C Improvements for ESDand Fast Transients
5-39456 LPP LPP4/27/99
5-39822 LPP6/23/99LPP
Mods to U2 clock line,NVRAM pullupD 5-39934 LPP 7/9/99
620002 D
ECG Amp
C
5 6Friday, July 09, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
U501-6
U502-3
U502-2
U502-5
U503-2
Right-Arm
aVRaVLaVF
LA
LA
LLLL
LALLV+
RA
RA
RA mux-
mux+diff+ U508-2
U508-3
Q504-d
diff-
ecg-hp
D503-3
-clamp
+clamp
D502-3 U501-5
U501-2
U503-5
R509-1
R511-1
R513-1
R515-1
Left-Arm
Left-Leg
V-Lead
Right-Leg
U501-3
Q504-s
Q504-g
U502-6
D504-3
V-
U508-5
U508-6
C514-2
diff-out
U50
8-1
u509-4
D501-3
D505-3
RL-mux
Q50
1-S
Mux-LdS-A
Sw-MonBw
Mux-LdS-B
Mux-LdS-C
RA
LA
LL
V+
VLdsOff
VLdsOff
VLdsOff
VLdsOff
VLdsOff
f+1.24V
fVcc
fVee
f+5V
vRL
Sw-RLD-LL
Sw-RLD-RL
An-ECG
Sw-RLD-RA
Sw-RLD-LA
Sw-RLD-V
fVcc
fVccfVee
fVcc
fVee
fVee
fVcc
EEE
E E E
E
E
E
E
E
E
E
E
EE
E
E
E
E
E E E E E
EEEEE
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
S
S
S
S
S
fVcc
fVee
fVee
fVeefVee
fVcc
fVee
fVee
fVee
fVcc
fVcc
fVee
fVcc
fVcc
fVcc
fVee
fVcc
fVcc
fVee
fVee
fVcc
E
fVcc
fVee
E
E
R50610K
C520.047uF
TP542
R55922Meg
R51710K
R50710K
R55530.1K
C530.047uF
C525.047uF
TP505
+
-
U507BMC34002
5
67
84
R556
10K
C526.047uF
C506220pF
+
-
U507AMC34002
3
21
84
TP539
C528.047uF
N501LAMP NEON
Q5042N7002
3
1
2
R54410K
R50151.1K
TP501
C532.047uF
D502MMBD1503A
1
3
2
C501220pF
C527.047uF
TP538
R54710K
C531.047uF
R50810K
C536.01uF
R549110K
TP540
TP524
C533.047uF
TP518
TP530
R5521K
TP509
R56022Meg
C529.047uF
R55173.2K
TP551
R50922Meg
TP502
D503MMBD1503A
1
3
2
N502LAMP NEON
TP517
R52610K
C507220pF
TP533
C517.01uF
TP521
R50251.1K
C5441000pF
C502220pF
Q5062N7002
3
1
2
+
-
U501AMC34002
3
21
84
R51010K
TP562
TP513TP511
R51910K
TP558
+
-
U502BMC34002
5
67
84
TP543
R5201.21K
+
-
U508BAD712
5
67
84
R51122Meg
R5481Meg
N503LAMP NEON C515
3.3uFC508220pF
TP560
TP514
R55722Meg
R55019.6K
TP549
TP550
D501MMBD1503A
1
3
2
R50351.1K
-
+U509LMC7101
4
31
25
C542220pF
TP515
TP503
D504MMBD1503A
1
3
2
C503220pF TP531
TP537
R51210K
TP527
+ C5354.7uF
TP512
Q5022N7002
3
1
2
+ C5344.7uF
C523.047uF
TP519
C519.047uF
R52110K
R54510K
TP510
R51322Meg
TP523
R52310K
TP536
J501CON6
123456
R553100K
TP504
R51410K
C504220pF
R565121K
U504
DG202CSE
31
1416
119
68
1345
2
15
10
7
S1IN1
S2IN2
S3IN3
S4IN4
V+V-GND
D1
D2
D3
D4
R5241.21K
TP508
R51522Meg
D506BAV99L
1
3
2
TP535
N504LAMP NEON
D507BAV99L
1
3
2
TP520
R5181.21K
+
-
U503AMC34002
3
21
84
R50451.1K
C543.047uF
R5221.21K
TP522
C509220pF
TP557
TP547
+
-
U501BMC34002
5
67
84
TP526
C510220pF
+
-
U503BMC34002
5
67
84
C511220pF
N505LAMP NEON
TP559
C512220pF
TP507
C513220pF
+
- U508AAD712
3
21
84
D505BAV99L
1
3
2
R516
10K
+
-
U502AMC34002
3
21
84
R50551.1K
R530 10K
C505220pF
R531 10K
C5451000pF
TP532
R55822Meg
R533 10K
R5271K
R535 10K
TP506
C5140.1uF
Q5012N7002
3
1
2
TP525
R536 10K
C516.047uF
R52851.1K
TP552
R537 10K
TP516
R52510K
TP548
C518.047uF
R532 10K
R529 10K
C522.047uF
C521.047uF
R534 10K
TP529
U5054051
131415121524
611109
3
168 7
X0X1X2X3X4X5X6X7
INHABC
X
VD
DV
SS
VE
E
C524.047uF
R54610K
TP528
U5064051
131415121524
611109
3
168 7
X0X1X2X3X4X5X6X7
INHABC
X
VD
DV
SS
VE
E
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
U601
PWM A/DConverter
U602
781uSec
-5V
(U604-10)
IntegratorInput
A/D Mux
U603
+5V
(U604-8)
Serial/ParallelControl Data
PWM-Out
ComparatorInputs
PWM-timer
U601
IsolationBarrier
U603
52uSec
Analog In
U602
U604
Rick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
620002.dsn
5-39118 JAC 3/15/99 LPP
L.Phillips
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/17/99
B See ECN worksheet
C Improvements for ESDand Fast Transients
4/27/995-39456 LPP LPP
LPP LPP5-39822 6/23/99
Mods to U2 clock line,NVRAM pullupD 7/9/995-39934 LPP
620002 D
ECG A/D and Interface
C
6 6Friday, July 09, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
U601-1
U60
3out
Mux-A/D-B
U60
2-7
U601-2
U604-4
U60
2-2
U60
2-5
iso601-a
Mux-A/D-C
Mux-A/D-A
U601-3
iso602-a
U60
4-8
U601-7
Q60
1-e
U604-6
D601-2
U604-10
Sw-DiagBw
U605-out
iso604-a
iso603-a
u604
-3
U602-3
SW-RL-V
U604-2 U613-6U60
4-1
U612-6
U611-6U60
4-5
U605-12
U610-6
Sw-RLD-RL
f+1.24V
An-ECG
LL
Mux-LdS-B
LA
Sw-RLD-RA
FE-PWM-ADC
Sw-RLD-LL
FE-ADC-Clock
Mux-LdS-A
RA
V+
Mux-LdS-C
Sw-RLD-LA
vRL
fVcc
iso+5Vdig
f+1.24VSw-MonBw
FE-Data-In
FE-Data-Clock
+5V
+5V
Sw-RLD-V
fVee
f+5V
f+1.24V
E
E
f+5V
f+5V
f+5V
ED
+5V
ED
E
E
fVee
E E
fVcc
ED
E
f+5V
fVcc
E
E
+5V
f+5V
E
E
E
ED
E
E
fVcc
iso+5Vdig
fVcc
E
ED
E
fVee
fVee
fVcc
fVcc
fVcc
iso+5Vdig
iso+5Vdig
ED
iso+5Vdig
iso+5Vdig
EDiso+5Vdig
ED
ED
ED
fVcc
fVee
E E
fVee
E E
E
fVee
ED
ED
f+5V
f+5V
ED
ED
TP615
TP622
TP608
U60674HCT595
14
1110
1213
151234567
9
168
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
VC
CG
ND
U604F74HCT04
13 12
147
TP601
C6371000pF
TP609
TP602 U604A74HCT04
12
147
R62346.4K
R60410K
C624.047uF
C636100pF
C634220pF
C6410.1uF
R60346.4K
R60110K
TP618
R60273.2K
R6053.48K
TP625
C632.047uF
R607464K
TP620
R6081K
C635220pF
U611HCNW4503
2
3
8
6
5TP610
U613HCNW4503
2
3
8
6
5
+
-U602LM311
2
37
5 64 1
8
Q601MMBT3904L
3
1
2
TP604
U612HCNW4503
2
3
8
6
5
C629.047uF
R6116.19K
TP611
R610511
R6136.19K
U60574HCT595
14
1110
1213
151234567
9
168
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
VC
CG
ND
U604C74HCT04
56
147
+
-U607BLM393
5
67
84
TP617
C603680pF
R621215
R6275.11K
U604D74HCT04
9 8
147
TP613
R6156.19K
TP603
+ C6314.7uF
R62246.4K
TP629
TP612
U604E74HCT04
11 10
147
+ C6094.7uF
U610HCNW4503
2
3
8
6
5
TP606
R62810K
C625.047uF
TP619
C601
1000pF
R62610K
+
-
U601AMC34072
3
21
84
C626.047uF
TP616
TP626
C627.047uF
TP614
R62510K
R6172.15K
+
-U607ALM393
3
21
84
C6420.1uF
TP605
C6280.1uF
D601MMBD1503A
1
3
2
TP627
C633100pF
C623.047uF
TP623
C6210.1uF
TP630
+ C6144.7uF
TP628
C622.047uF
+
-
U601BMC34072
5
67
84
U604B74HCT04
34
147
TP624
R624
5.11K
R619619
TP621
TP607
U6034051
131415121524
611109
3
168 7
X0X1X2X3X4X5X6X7
INHABC
XVD
DV
SS
VE
E
R6063.48K
R620619
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
AMD N/C: 9, 10, 13, 14
AMD RY/BY#: 15
----------------
MICRON N/C: 9, 10, 15
MICRON Vpp: 13
Boot Configuration Latch
Active during power-on
Boot Configuration Pull-Up: 0 1 0 0 1 0 0 1 1 1 1 0 0 0 0 0
(see page 4-10)
0: internal arbitration
1: MSR(ip) = 0, interrupt prefix is 0x0000
0: reserved
0: memory controller is active after reset
1,0: 16-bit boot device
0: reserved
1,1: IMMR base is 0xfff0-0000
1,1: DBGC mode
0,0: DBPC mode
0,0: External bus division factor
Jim Belesiu
Jim Belesiu
Mar 5, 1999
Mar 5, 1999
620005.dsn
JAC5-39173 3/18/99
L. Phillips
Z. Psenicnik
J. Bello
3/19/99
3/19/99
3/19/99
LPP
B ZIP4/15/99JJC5-39353Component change forfrequency modulationChange Reset IC U3,No Load C40
C 6/24/99LPP5-39830
REV Description ECN/ECO Init Date Ckd
A Release to Production
620005 C
Flash, SDRAM and HRESET Config Word
C
4 6Thursday, June 24, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
A20
A22
A26
D13
dx7
GPL1
A24
A17
A13
D6
D4
dx9
A28
A10 A9
D14
D15
dx1
dx8
dx11
GPL0
A21
A22
D6
D3
D1
A28
A12
D2
D0
D10
A27
CS_n1
D11
D10
D1
D11
dx10
D9
D9
D9
D4
D8
D8
A30
D8
D4
D10
A21
A19
A15
D2
dx12
A25
A25
A23
A14
A11
A24
D13
CS_n0
GPL3GPL2
A16
D7
D0
D14
GPL1
A23
D15A29
A27
A29
D7
D5
D3
BS_AB1
A18
A30
D1
D7
dx4
D5
D12
BS_AB0
A26
D12
CLKOUT
BS_AB[0:3]
D[0:31]
GPL[0:7]
CS_n[0:7]
SRESET_n
HRESET_n
A[6:31]
VDDH
VDDH
VDDH
VDDH
VDDH
VDDH
VDDH
U6
FLASH-512Kx16
29313335384042443032343639414345
252423222120191887654321
4817
13 37
47
9
14
4627
2826
1112
1015
16
D0D1D2D3D4D5D6D7D8D9
D10D11D12D13D14D15
A0A1A2A3A4A5A6A7A8A9A10A11A12A13A14A15A16A17
NC
3
Vcc
Byte#
NC1
NC4
Gnd
-a
Gnd
-b
OE#CE#
WE#RESET#
NC2RY/BY#
A18
TP54
1
TP55
1
TP53
1
U5SDRAM-1Mx16
23568911123940424345464849
2122232427282930313220
3813
14
33
36
2647
37
19
18171516
4 10 41
3435
50
1 25447
DQ0DQ1DQ2DQ3DQ4DQ5DQ6DQ7DQ8DQ9
DQ10DQ11DQ12DQ13DQ14DQ15
A0A1A2A3A4A5A6A7A8A9A10
Vcc
Q3
Vcc
Q2
DQML
NC1
DQMH
Vss
1
Vss
Q4
NC2
BA
CS#RAS#WE#CAS#
Vss
Q1
Vss
Q2
Vss
Q3
CKECLK
Vss
2
Vcc
1V
cc2
Vcc
Q4
Vcc
Q1
R57
100K
12
T1U474AHC244
246811131517
119
181614129753
2010
1A11A21A31A42A12A22A32A4
1G2G
1Y11Y21Y31Y42Y12Y22Y32Y4
VC
CG
ND
T2
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
Audio DAC Resistors
Jim Belesiu
Jim Belesiu
Mar 5, 1999
Mar 5, 1999
620005.dsn
3/18/99JAC5-39173
3/19/99
3/19/99
3/19/99
L. Phillips
Z. Psenicnik
J. Bello
LPP
B ZIP4/15/99JJC5-39353Component change forfrequency modulationChange Reset IC U3,No Load C40
C 6/24/99LPP5-39830
REV Description ECN/ECO Init Date Ckd
A Release to Production
620005 C
FPGA
C
2 6Thursday, June 24, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
A26A27A28A29
GPL1
CS_n2
VIDEO1
D6
VIDEO6
D5
VIDEO5VIDEO4
VIDEO2
D4
VIDEO3
VIDEO7
D7
D3
VIDEO0
D2D1D0
S2
S4
S7
S6
S5
S0
S3
S1
S2
S7
S4
S1
S3
S0
S6S5
IRQ_n1IRQ_n2
SPIMOSI
SPICLKCONFIG_DONE
A25
NSTATUS
SDACK2_n
DREQ2_n
SDACK1_n
DREQ1_n
A[6:31] GPL[0:7] CS_n[0:7]
VIDEO[0:7]
D[0:31]
VSYNCHSYNC
Speaker-Audio
IRQ_n[0:7]
Blank
SPIMOSISPISEL_nVideo-Data-x
VSYNC-xHSYNC-x
NIBP-Data-x
Recorder-Strobe-x
Recorder-Data-Latch-xRecorder-Clock-x
Recorder-Data-x
PC6
Recorder-Motor-Step-x
NIBP-Overpressure-xNIBP-15mmHg-x
TIN1
FE-Data-x
TIN2
ADC-Clock-x
FE-Clock-x76.8KHz
TIN3NIBP-Fault-x
SPI-data-in-xSPI-clock-xSPI-data-out-xLED-Latch-xKey-Latch-x
NIBP-Offset-DAC-x
PA14
PC10
PB16
PA7PA6
PC11
PC12
Video-Clock-3
PA5
SPIMISO
RD/WR_n
Video-Clock-25
FieldSPICLK
CLKOUT
PA15
VDDH
R69 12.4K
R1251.58K
R68 24.9K
R70 6.19K
R71 3.09K
R73 787
TP80
1
C121
330pF12
U7
EPF6016A
5
12
4 8972
13
15
2021
1617
14
18
2425262728
50
876
29303132
3722 71
37
19
525556
36 54 53
68
41403534
70
33
39 88
51
10
86
69
12
38
23
89
11
49
42434445464748
1009998979695949392
90
84
82
8079
767574
676665
636261605958
57
91
64
85
83
81
7778
73
GN
D-5
GCLK-12
nCE
DC
LK
CO
NF
IG_D
ON
E
GCLK-13
P15
GN
D-2
0
VC
C-2
1
P16P17
P14
TMS-18
P24P25P26P27P28
P50
GN
D-8
7
VC
C-6
P29P30P31P32
GN
D-3
7
MS
EL
VC
C-7
1
P3P7
P19
P52P55P56
nCO
NF
IG
VC
C-5
4
GN
D-5
3
P68
P41P40P35P34
GN
D-7
0
P33
nST
AT
US
VC
C-8
8TDO-51
TDI-10
DA
TA
CLKUSR-69
P1P2
VC
C-3
8
TCK-23
P8P9
P11
nCEO-49
P42P43P44P45P46P47P48
P100P99P98P97P96P95P94P93P92
P90
P84
P82
P80P79
P76P75P74
RDYnBSY-67P66P65
GCLK-63GCLK-62
P61P60P59P58
P57
DEV_CLRn-91
INIT_DONE-64
DEV_OE-85
nRS-83
nWS-81
nCS-77Cs-78
P73
R72 1.58KR126
33
R66 100K
R67 49.9K
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
CPU PCA SW Debug Port(aka BDM Connector)
Test Points
1 - Visual History Buffer Flush Status (’823 output)
2 - Reset Output (’823 input)
3 - Ground
4 - BDM Clock (’823 input)
5 - Ground
6 - Visual History Buffer Flush Status (’823 output)
7 - Reset Input (’823 Output)
8 - BDM Data Input (’823 Input)
9 - Vcc
10 - BDM Data Output (’823 Output)
Main PCA Connectors
Jim Belesiu
Jim Belesiu
Mar 5, 1999
Mar 5, 1999
620005.dsn
5-39173 JAC 3/18/99 LPP
L. Phillips
Z. Psenicnik
J. Bello
3/19/99
3/19/99
3/19/99
BComponent change forfrequency modulation 5-39353 JJC 4/15/99 ZIP
Change Reset IC U3,No Load C40
C 5-39830 LPP 6/24/99
REV Description ECN/ECO Init Date Ckd
A Release to Production
620005 C
Atlas CPU SubsystemC
1 6Thursday, June 24, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
DSDO
ADC-Clock
SPI-data-in
TA_n
NIBP-15mmHg
PC6
CLKOUT
SpO2-Tx
Main-Supply-On
FE-Data
DSDI
SCD
Video-Horizontal-SyncSPI-clock
NIBP-PWM-ADC
SpO2-Rx
Spare-1
On-Standby-Key
Video-Clock-3
EKG-PWM-ADC
RS423-CTS
SPI-data-out
PA4
ETCO2-Rx
NIBP2-PW-ADC
VbackupNIBP-Valve
Spare-3
RD/WR_n
PA14
SPIMISO
Nurse-CallKey-Latch
Main-Power-Sync
Spare-2
NIBP-Overpressure
SCL
Batt-ID
ETCO2-Tx
PB16
PC10
VFLS1
+3.3V_unfiltered
Recorder-Data
PC13
HRESET_n
Video-Vertical-Sync
Recorder-Data-Latch
Burst_n
TS_n
AC-On
RS423-Tx
Recorder-Strobe
PA7
SRESET_nVFLS0
HRESET
Rec-Paper-Out
NIBP-Data
PC12
PA6
SPISEL_n
LED-Latch
NIBP-Offset-DAC
Video-Data
SPIMOSI
DSCK
+3.3V_unfiltered
Speaker-Audio
Recorder-Motor-Step
FE-Clock
PA5
PA15
NIBP-Fault
RS423-Rx
Recorder-Clock
SPICLK
VDDH
TP75 1
TP77 1
TP601 TP61 1
TP78 1
TP621
TP59 1
TP641
TP63 1
TP701
TP65 1
TP69 1
TP661
TP761
TP581
TP681
TP71 1
JP8
HEADER 30x2
13579
11131517192123252729313335373941434547495153555759
24681012141618202224262830323436384042444648505254565860
1357911131517192123252729313335373941434547495153555759
2468
1012141618202224262830323436384042444648505254565860
TP721
TP67 1
TP73 1
TP741
JP5
HEADER 5X2
1 23 45 67 89 10
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
MODCK (0,0) Selects 32KHz as main oscillator
RSTCONF = 0 allows ’823 to sample data bus
during HRESET
PWM Input Timer Signals
Jim Belesiu
Jim Belesiu
Mar 5, 1999
Mar 5, 1999
620005.dsn
5-39173 JAC 3/18/99 LPP
3/19/99
3/19/99
3/19/99
L. Phillips
Z. Psenicnik
J. Bello
Bfrequency modulationComponent change for 5-39353 JJC 4/15/99 ZIP
Change Reset IC U3,No Load C40
C 5-39830 LPP 6/24/99
620005 C
I/O Filters
C
3 6Thursday, June 24, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
IRQ_n0IRQ_n1IRQ_n2IRQ_n3
IRQ_n4IRQ_n5IRQ_n6IRQ_n7
IP_B6IP_B7
IP_B3IP_B2
IP_B4IP_B5
GPL4GPL5
IRQ_n0
SPI-data-out-xSPI-data-out
Video-Vertical-SyncVideo-Horizontal-Sync HSYNC-x
VSYNC-x
DSDI
SCLSCD
Recorder-Clock-xRecorder-Strobe-x
Recorder-Data-Latch-x
Recorder-Data-x
Recorder-Clock
Recorder-Data
Recorder-Data-Latch
Recorder-Strobe
VFLS1
VFLS0
WAIT_B_n
IP_B[2:7]
I2CSCLSCLSMRXD2SMTXD2SpO2-Tx
SpO2-Rx
ETCO2-TxETCO2-Rx SMRXD1
SMTXD1RXD2TXD2
RS423-RxRS423-Tx
Nurse-CallPC9
Key-Latch-xKey-Latch
SCD I2CSDA
NIBP-Offset-DACRec-Paper-Out
RS423-Rx
SpO2-Rx
FE-ClockFE-Data
ADC-ClockFE-Data-xFE-Clock-x
ADC-Clock-x
SPI-clock-xSPI-clock
LED-Latch-xSPI-data-in SPI-data-in-x
Video-Data-xVideo-Data
SPI-data-in
NIBP-Data-xNIBP-DataBatt-ID
NIBP-Fault-xNIBP-Fault
NIBP-15mmHg
NIBP-Overpressure
ETCO2-Rx
AC-On
PA6NIBP-Valve
NIBP-Offset-DAC-x
PB18
LED-Latch
PC5
PC7
Spare-1Spare-2
Batt-ID
EKG-PWM-ADC
MODCK1
MODCK2
PB17
PC8
PB19
Rec-Paper-Out
RS423-CTS
AC-On
TIN3NIBP2-PW-ADCSpare-3
Burst_nBG_nTS_nSPKROUT
NIBP-Fault
FRZ
PC11
DREQ1_n
GPL[0:7]
NIBP2-PW-ADC RS423-CTS
TMS
PB16
PC13
SRESET_n
PA4
PA7
PA15
PA5
On-Standby-KeyDREQ2_n
Spare-1
Spare-3
PC10
NIBP-PWM-ADC
PC12
76.8KHzTEXP
On-Standby-Key
Main-Power-SyncMain-Supply-On
EKG-PWM-ADC TIN1
TIN2NIBP-PWM-ADC
NIBP-15mmHg-x
Recorder-Motor-Step Recorder-Motor-Step-x
NIBP-Overpressure-xNIBP-OverpressureNIBP-15mmHg
PC4
TEA_n
TA_n
BB_n
BR_n
TRST_n
ALE_B
RSTCONF_n
BI_n
DSCK
IRQ_n[0:7]
VDDH
VDDH
VDDH
VDDH
VDDH
VDDH
VDDH
VDDH
VDDH
VDDH
VDDH
VDDH
VDDH
VDDH
C70330pF
12
C
R86
10K
51234
6789
10
R151215
C124330pF
12
C72330pF
12
C71330pF
12
C123330pF
12
C78330pF
12
R1521.58K
R108
1.58K
C79330pF
12
C125330pF
12
C81330pF
12
R105
1.58K
C80330pF
12
C89330pF
12
R104
NL
C86330pF
12
C87330pF
12
R107
NL
C88330pF
12
R133NL
C90330pF
12
R1293.09K
C93330pF
12
C91330pF
12
R88
100
1234 5
678
C92330pF
12
C94330pF
12
C97330pF
12
R1313.09K
C95330pF
12
C96330pF
12
R82
100
1234 5
678
R1321.58K
C105330pF
12
C12222pF
12
C103330pF
12
C
R83
10K
51234
6789
10
C102330pF
12
C
R76
10K
51234
6789
10
C104330pF
12
R87
100
1234 5
678
C
R103
10K
51234
6789
10
R85
100
1234 5
678
C66330pF
12
C
R16
10K
51234
6789
10
C67330pF
12
C
R91 10K
51234
6789
10
C68330pF
12
R77
100
1234 5
678
C69330pF
12
R1276.19K
R80
100
1234 5
678
C76330pF
12
R74
100
1234 5
678
C77330pF
12
C75330pF
12
C74330pF
12
C
R49
10K
51234
6789
10
R1303.09K
R90
100
1234 5
678
R1286.19K
R78
100
1234 5
678
R81
100
1234 5
678
C57330pF
12
C56330pF
12
C55330pF
12
C54330pF
12
C63330pF
12
C64330pF
12
R1341.58K
R120
NL
R116
100
1234 5
678
C65330pF
12
C62330pF
12
C126330pF
12
C73330pF
12
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
Attach GND and
VSSSYN at a
single point.
Place VSSSYN
on a split
plane beneath
the MPC823 PLL
section
Jim Belesiu
Jim Belesiu
Mar 5, 1999
Mar 5, 1999
620005.dsn
3/18/99JAC5-39173 LPP
L. Phillips
Z. Psenicnik
J. Bello
3/19/99
3/19/99
3/19/99
Bfrequency modulationComponent change for 5-39353 JJC 4/15/99 ZIP
Change Reset IC U3,No Load C40
C 5-39830 LPP 6/24/99
620005 C
PowerPC MPC823 CPU
C
5 6Thursday, June 24, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
BG
_nB
B_n
IRQ
_n2T
EA
_n
A27
D[0:31]
BS_AB[0:3]
IP_B
2
IRQ
_n7
D18
D4
D0
A22
A14
A[6:31]
IRQ_n[0:7]
IP_B
4
TA
_n
D30
D22
D21
D7
D6
D1
A30
A18
IP_B
5B
R_n
D31
D23
D20
D15
D11
D9
D8
A24
A21
A20
A19
A17
A8
IP_B
6
BS
_AB
0
IRQ
_n4
SP
KR
OU
T
D29
A12
A11 IR
Q_n
1
IRQ
_n5
CS
_n7
D13
GP
L5
GP
L3
IRQ
_n6
CS
_n6
CS
_n5
A25
IP_B
3
BS
_AB
2
TS
IZ1
CS
_n4
D26
D24
D16
A6
GPL[0:7]
GP
L6
GP
L4
D28
D5
D3
D2
A26
GP
L7
TS
IZ0
CS
_n0
A31
A28
A23
A9
GP
L2
BI_
n
D27
D25
D10
A16
A15
A10
CS_n[0:7]
IP_B
7
FR
Z
IRQ
_n3
CS
_n1
D12
A7
TSIZ[0:1]
BS
_AB
3
IRQ
_n0
CS
_n3
D14
A29
IP_B[2:7]
GP
L1G
PL0
BS
_AB
1
CS
_n2
D19
TS
_n
D17
A13
VID
EO
0V
IDE
O1
VID
EO
2V
IDE
O3
VID
EO
4V
IDE
O5
VID
EO
6V
IDE
O7
GN
D
VS
SS
YN
VIDEO[0:7]
A[6:31]
TSIZ[0:1]
TEXP
PORESET_n
EXTCLK
Field
HSYNC
SPISEL_n
SPIMOSISPICLK
Video-Clock-3XTAL
MODCK2XFC
MODCK1EXTAL
HRESET_n
VSYNC
SRESET_n
CLKOUT
Blank
SPIMISO
RD/WR_n
I2CSCLI2CSDA
CS_n[0:7]
IRQ_n[0:7]
BS_AB[0:3]
SMRXD2
PA7SMTXD2
PA6
PA4PA5
PA15PA14
TXD2RXD2
PB19
PB16
PB18PB17
SDACK2_nSDACK1_n
SMTXD1SMRXD1
DREQ1_n
PC13DREQ2_n
PC12
PC10PC11
PC7
PC5
PC8PC9
PC6
DSDOTMS
TRST_nVFLS0
VFLS1
DSCK
RSTCONF_n
DSDI
D[0:31]
GPL[0:7]
WAIT_B_nALE_B
IP_B[2:7]
Burst_n
TS_nTA_nTEA_nBI_nBR_nBG_nBB_n
SPKROUTFRZ
PC4
VDDH
VDDL
KAPWR VDDSYN
MPC823�WKH�PRQVWHU�
U1
MPC823ZC
M13
N15
N16
M15
L13
M16
M14
L14
L15
L16
K14
K13
G13
K15
J15
J14
G14
H15
H13
H14
F14
K16
G16
H16
G15
F16
M1
L1 J2 J1 L2 H1
F1
E1
M2
K2
K3
K1
M4
M3
J3 J4 H2
K4
H3
G2
G3
F2
H4
L4 F3
G4
E4
L3 F4
E2
D2
E3
D12
A14
B14
A15
B16
D13
C14
B15
E5E6E7E8E9
E10E11E12
F5F12G5
G12H5
H12
J5J12K5
K12L5
L12M5M6M7M8M9
M10
A7G1J16T7
F6
F7
F8
F9
F10
F11
G6
G7
G8
G9
G10
G11
H6
H7
H8
H9
H10
H11
J6 J7 J8 J9 J10
J11
K6
K7
K8
K9
K10
K11
B1
A3
A1
A2
M11M12
L6 L7 L8 L9 L10
L11
B3
C5
B5
B4
A4
A5
B2
D1
A6
D5
T1
P4
T2
N5
R3
P5
T3
R4
R2
R1
P2
P3
N4
F15
E15
C13
B10
A13
D10
A12
C11
B12
D9
B7
C3
D4
D3
C2
A10
N3
N2
N1
B11
A11
C10
D16
E16
D15
F13
E13
C16
C15
D14
D11
B13
C12
T12
R12
R11
N12
P11
C4
B8
A8
C8
D7
A9
B9
C9
C7
D8
D6
B6
P16R15R14R13N10T9T8P8T6R6
N14P15P14T15T14P12N11T11T10R9R7P7N7R5
R16T16P13T13R10P9R8N8T5N6P6T4
A16C1C6
E14J13
N9
N13
P1
P10
A6
A7
A8
A9
A10
A11
A12
A13
A14
A15
A16
A17
A18
A19
A20
A21
A22
A23
A24
A25
A26
A27
A28
A29
A30
A31 D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D14
D15
D16
D17
D18
D19
D20
D21
D22
D23
D24
D25
D26
D27
D28
D29
D30
D31
CS
0_n
CS
1_n
CS
2_n
CS
3_n
CS
4_n
CS
5_n
CS
6_n
/ C
E1_
B_n
CS
7_n
/ C
E2_
B_n
VDDH1VDDH2VDDH3VDDH4VDDH5VDDH6VDDH7VDDH8VDDH9VDDH10VDDH11VDDH12VDDH13VDDH14
VDDH17VDDH18VDDH19VDDH20VDDH21VDDH22VDDH23VDDH24VDDH25VDDH26VDDH27VDDH28
VDDL1VDDL2VDDL3VDDL4
GN
D1
GN
D2
GN
D3
GN
D4
GN
D5
GN
D6
GN
D7
GN
D8
GN
D9
GN
D10
GN
D11
GN
D12
GN
D13
GN
D14
GN
D15
GN
D16
GN
D17
GN
D18
GN
D25
GN
D26
GN
D27
GN
D28
GN
D29
GN
D30
GN
D31
GN
D32
GN
D33
GN
D34
GN
D35
GN
D36
VD
DS
YN
KA
PW
R
VS
SS
YN
VS
SS
YN
1
VDDH29VDDH30
GN
D37
GN
D38
GN
D39
GN
D40
GN
D41
GN
D42
PO
RE
SE
T_n
RS
TC
ON
F_n
HR
ES
ET
_nS
RE
SE
T_n
XT
AL
EX
TA
LX
FC
CLK
OU
TE
XT
CLK
TE
XP
VD
0 /
LD1
/ P
D8
VD
1 /
LD2
/ P
D9
VD
2 /
LD3
/ P
D10
VD
3 /
LD4
/ P
D11
VD
4 /
LD5
/ P
D12
VD
5 /
LD6
/ P
D13
VD
6 /
LD7
/ P
D14
VD
7 /
LD8
/ P
D15
FIE
LD /
LD
0 /
PD
7B
LAN
K /
LO
E /
LC
D_A
C /
PD
6V
SY
NC
/ F
RA
ME
/ P
D5
HS
YN
C /
LO
AD
/ P
D4
CLK
-SH
IFT
/ P
D3
TS
IZ0
/ R
EG
_nT
SIZ
1R
D /
WR
_nB
urst
_nB
DIP
_n /
GP
L_B
5_n
TS
_nT
A_n
TE
A_n
BI_
n
RS
V_n
/ I
RQ
2_n
KR
_n /
IR
Q4_
n /
RE
TR
Y /
SP
KR
OU
TD
P0
/ IR
Q3_
n
DP
1 /
IRQ
4_n
DP
2 /
IRQ
5_n
DP
3 /
IRQ
6_n
FR
Z /
IR
Q6_
nIR
Q7_
n
IRQ
1_n
IRQ
0_n
BR
_n
BB
_nB
G_n
WE
0_n
/ B
S_A
B0_
n /
IOR
D_n
WE
1_n
/ B
S_A
B1_
n /
IOW
R_n
WE
2_n
/ B
S_A
B2_
n /
PC
OE
_nW
E3_
n /
BS
_AB
3_n
/ P
CW
E_n
GP
L_A
0_n
/ G
PL_
B0_
nG
PL_
A1_
n /
GP
L_B
1_n
/ O
E_n
GP
L_A
2_n
/ G
PL_
B2_
n /
CS
2_n
GP
L_A
3_n
/ G
PL_
B3_
n /
CS
3_n
UP
WA
ITA
/ G
PL_
A4_
n /
AS
_nU
PW
AIT
B /
GP
L_B
4_n
GP
L_A
5_n
TC
K /
DS
CK
TM
ST
DI
/ D
SD
IT
DO
/ D
SD
OT
RS
T_n
WA
IT_B
_nA
LE_B
/ D
SC
K /
AT
1IP
_B0
/ IW
P0
/ V
FLS
0IP
_B1
/ IW
P1
/ V
FLS
1IP
_B2
/ IO
IS16
_B_n
/ A
T2
IP_B
3 /
IWP
2 /
VF
2IP
_B4
/ LW
P0
/ V
F0
IP_B
5 /
LWP
1 /
VF
1IP
_B6
/ D
SD
I /
AT
0IP
_B7
/ P
TR
_n /
AT
3
OP
2 /
MO
DC
K1
/ S
TS
_nO
P3
/ M
OD
CK
2 /
DS
DO
PA15 / USBRXDPA14 / USBOE_n
PA13 / RXD2PA12 / TXD2
PA9 / L1TXDA / SMRXD2PA8 / L1RXDA / SMTXD2
PA7 / CLK1 / TIN1 / L1RCLKA / BRGO1PA6 / CLK2 / TOUT1_n / TIN3
PA5 / CLK3 / TIN2 / L1TCLKA / BRGO2PA4 / CLK4 / TOUT2_n / TIN4
PB31 / SPISEL_n / LCD_APB30 / SPICLK
PB29 / SPIMOSIPB28 / SPIMISO
PB27 / I2CSDA / BRGO1PB26 / I2CSCL / BRGO2
PB25 / SMTXD1PB24 / SMRXD1
PB23 / SMSYN1_n / SDACK1_nPB22 / SMSYN2_n / SDACK2_n
PB19 / L1ST1 / LCD_BPB18 / RTS2_n / L1ST2PB17 / L1ST3 / LCD_CPB16 / L1RQA / L1ST4
PC15 / DREQ1_n / L1ST5PC14 / DREQ2_n / RTS2_n / L1ST6
PC13 / L1ST7PC12 / L1RQA / L1ST8
PC11 / USBRXPPC10 / TGATE1_n / USBRXN
PC9 / CTS2_nPC8 / CD2_n / TGATE1_n
PC7 / USBTXPPC6 / USBTXN
PC5 / L1TSYNCA / SDACK1_nPC4 / L1RSYNCA
NC1NC2NC3
NC4NC5
NC
6N
C7
NC
8N
C9
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
Supply RF/EMIFilters and ResetCircuits
FPGA decoupling caps
MPC823 decoupling caps
System Clock
1536*830 < XFC < 1536*1470 pf Value selected for the final mulitplication ratio
RF Suppression
to CPU
System
Place decoupling capacitors next to CPU VDDSYN pin B1 and VSSSYN pin A1 and A2
Split ground plane under these components
’244
decoupling cap
DRAM decoupling caps
Place these components
as close to the
processor as possible
Use separate PPL VDDSYN power plane from 3.3V plain
to CPU PLL pins A1
and A2
FPGA Clock
FLASH decoupling caps
to CPU PLL
pin B1
to CPU 32KHz
Clock
PLL Filter
Capacitor
MPC823 PLLSupply
RF Suppression
Oscillator
decoupling
cap
Jim Belesiu
Jim Belesiu
Mar 5, 1999
Mar 5, 1999
620005.dsn
5-39173 JAC 3/18/99 LPP
L. Phillips
Z. Psenicnik
J. Bello
3/19/99
3/19/99
3/19/99
FM Section for spreading RF
emissions. R2 selects the
deviation.
Load C107 w/1.5uF and unload C1 for non-FM clocking
From FPGA
B ZIP4/15/99JJC5-39353frequency modulationComponent change for
Change Reset IC U3,No Load C40
C 6/24/995-39830 LPP
620005 C
Power Distribution, Clocks and Reset
C
6 6Thursday, June 24, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
xtalp
VCLK
VSSSYN
Q1-Base
PORESET-Input
XFCX
+3.3V_unfiltered
HRESET
HRESET_n
Video-Clock-25
Vbackup
EXTAL
PORESET_n
EXTCLK
XFC
+3.3V_unfiltered
XTAL
PA14
VDDH
VDDSYN
VDDH
VDDL
VDDH
VDDH
KAPWR
VDDH
VDDH
VDDH
VDDH
VDDH
C1116.8uF
12
C1106.8uF
12
C28100nF
12C130
NL
12
C29100nF
12
C10822pF
12
C43100nF
12
Y1
32768Hz
1 2
C44100nF
12
C115330pF
12
R118NL
R513.9M
R119NL
R50 200K
C41100nF
12
C42100nF
12
C39
100nF
12
L1Ferrite-120
1 2C106100nF
12
R123
100K
C166.8uF 1
2
L3Ferrite-120
1 2
R122
12.4K
C18
6.8uF
12
U32.0V
12
3
Reset_nInput
Gnd
Q1NL
3
1
2
R94
NL
R121
NL
C376.8uF
12
C116330pF 1
2
C1206.8uF
12
C38
6.8uF
12
R52
33
C114
330pF
12
C13
100nF
12
C15100nF
12
C6100nF
12
C146.8uF
12
C118
330pF
12
C7100nF
12
C10922pF
12
R21K
R117
200K
C17100nF
12
C119
330pF
12
C11.5uF
12
R124
1.58K
C36100nF
12
C128100nF
12
C40100nF
12
R1100
C4100nF
12
C5100nF
12
C2100nF
12
C12
6.8uF
12
C21100nF
12
C22100nF
12
C107NL
12
L2 Ferrite-120
1 2
C19100nF
12
U23.0V
12
3
Reset_nInput
Gnd
G1
SG-636PCE-25.175M
1
2 3
4OE
GND OUT
VDD
C20100nF
12
C30100nF
12
C1136.8uF
12
C31100nF
12
C117330pF
12
C1126.8uF
12
C32100nF
12
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
On/Standby
Place capacitorsby connector
AC On LEDs
Trend
Lead Select
Break-Away PCB SectionFlag Pole Area
Place one tantalumcap near each sevensegment LED group
Place oneceramic capnear eachIC
Silence ButtonBreak-Away PCBSection
Silence
Switch
7
1
9
Pull-up Resistor Network Detail
5
6
4
8
10
2 3
Silence LED
Jim Belesiu
Jim Belesiu
3/15/99
3/15/99
3/23/99 LPPJAC5-39251
L. Phillips
Z. Psenicnik
J. Bello
3/24/99
3/24/99
3/24/99
B No Load D16
D13 to Low Profile, R51 to 316C
5-39485 4/28/99LPP LPP
7/23/99LPP5-39994
620008 C
Front Panel Display Board
C
1 5Friday, July 23, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
NIBP LED Circuits
Front Panel - C
LED_NIBP_Clock
LED_NIBP_Latch
LED_NIBP_Data_In
LED_NIBP_Data_Out
Silence-LEDLED_NIBP_Enable
I705124
Front Panel - D
LED_SpO2_Clock
LED_SpO2_Latch
LED_SpO2_Data_In
LED_SpO2_Enable
Keyboard Circuits
Front Panel - A
Key-Clock-b
Key-Latch-b
Key-Data-b
On/Off-sw
Silence-Switch
Trend
Lead-Select
I705144
Front Panel - B
LED_TP_Data_In
LED_TP_Clock
LED_TP_LatchLED_TP_Data_Out
LED_TP_Enable
On/Off-sw
Clock1
PrintLead-SelectTrend
ACON-LED
u13-out
u19-out
Print-sw
Lead-Select-sw
FP-Common
ACLED-2
ACLED-1
AC-On-x
Sil-Sw-a
D10-C
D10-Vcc
Silence-Switch
On-Led
Silence-LED
Sil-Sw-b
Key-Clock
LED-Data
LED-Latch-2
u26-18Key-Latch-b
LED-Latch-n
Key-data-b
Key-DataLED-Data-b
Clock3
u26-9u26-7LED-Latch-1
Key-Latch-n
Clock2
LED_SPO2_enable
LED_TP_enable
LED-Enable
LED_NIBP_enable
Trend-sw
VCC
VCCVCC
VCC VCC VCC VCC VCC
VCC VCC VCC VCC VCC
VCC
VCC VCC VCC
VCC
VCC
VCC VCC
VCC
VCC VCC
VCC
VCC VCCVCC VCC VCC
VCC
TP2
C18
0.1uF
J2A
flex-cable-5
12345
TP3
J2xA
flex-cable-5
12345
TP4
C4
0.1uF
+ C1
4.7uF
U1F
74HC04
13 12
C21
0.1uF
+ C8
4.7uF
C24
0.1uF
+ C10
4.7uF
C20
0.1uF
+ C11
4.7uF
C23
0.1uF
+ C28
4.7uF
C25
0.1uF
C2
0.1uF
R12.2K
23418 5 6 7
C3
0.1uF
C26
0.1uF
C5
0.1uF
R71100
C6
0.1uF
U26
74HC244
2468
11131517
119
181614129753
1A11A21A31A42A12A22A32A4
1G2G
1Y11Y21Y31Y42Y12Y22Y32Y4
C7
0.1uF
R72100
C16
0.1uF
J1
HEADER 7X2
1 23 45 67 89 1011 1213 14
R73100
C12
0.1uF
+ C27
4.7uF
TP182
C13
0.1uF
+ C9
4.7uF
TP183
C14
0.1uF
TP184
C15
0.1uF
D15x5 Green
1 2
U1A
74HC04
1 2
C19
0.1uF
D25x5 Green
1 2
U1B
74HC04
3 4
C22
0.1uF
SW13
12
U1C
74HC04
5 6
D10
T1 (3mm) Red
12
SW9
12
U1D
74HC04
9 8
SW221 2
SW11
12
U1E
74HC04
11 10
SW28
1 2
R67 1.21K
1 2
J3A
flex-cable-5
12345
R51316
R66 1.21K
1 2
J3xA
flex-cable-5
12345
D13T1 (3mm) Green
12
R65 1.21K1 2
R22.15K
C17
0.1uF
R68 1.21K
1 2
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
ETCO2 Alarm On-Off
HR Alarm On-Off
LH Select
LH Adjust (+)
LH Adjust (-)
SpO2 Alarm On-Off
RH Select
RH Adjust (+)
RH Adjust (-)
NIBP Alarm On-Off
BP Auto
BP Start-Stop
QRS Volume (+)
QRS Volume (-)
Alarm Volume (+)
Alarm Volume (-)
Time
1
5
4
69
10
Pull-up Resistor Network Detail2 3
78
On / Standby
Jim Belesiu
3/15/99Jim Belesiu
3/15/99
Jim Belesiu
3/15/99Jim Belesiu
3/15/99 620008.dsn
3/23/99
3/23/99
3/23/99
3/23/99
L. Phillips
Z. Psenicnik
J. Bello
5-39251 JAC LPP
B No Load D16
D13 to Low Profile, R51 to 316C
4/28/99LPP LPP5-39485
5-39994 LPP 7/23/99
62008 A
Front Panel Display Board
C
1 5Friday, July 23, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
620008 C
Keyboard Scanner
C
2 5Friday, July 23, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
u2-9
Clock1
HRalarm-swLHselect-swLHAdjust+swLHAdjust-sw
QRSvol+sw
Alarmvol+swAlarmvol-swTime-sw
etco2-sw
Trend
Lead-Select
NIBPalarm-sw
RHselect-sw
BPauto-sw
RHadjust+swRHadjust-sw
SpO2alarm-sw
BPstart/stop-sw
U3-4
QRSvol-sw
u2-10
VCC
VCC
VCC
TP80
SW19
1 2
TP81
SW20
1 2
TP82
SW211 2
TP86
C
R610K
512346789
10
TP85
C
R510K
543219876
10
TP84
SW251 2
TP77
SW26
1 2
TP83
SW23
1 2
TP87
SW24
1 2
TP88
C
R710K
512346789
10
U2
74HC165
10111213143456
2151
9
7
SERABCDEFGH
CLKINHSH/LD
QH
QH
TP178
SW27
1 2
U4
74HC165
10111213143456
2151
9
7
SERABCDEFGH
CLKINHSH/LD
QH
QH
D48
BAV99L
1
3
2
SW14
1 2
SW4
1 2
TP68
SW61 2
TP69
SW81 2
TP70
SW10
1 2
TP71
SW12
1 2
TP66
SW11 2
TP72SW21 2
TP73
SW3
1 2
TP74
SW5
1 2
U3
74HC165
10111213143456
2151
9
7
SERABCDEFGH
CLKINHSH/LD
QH
QHSW7
1 2
TP75
SW15
1 2
TP76
SW161 2
TP67
SW17
1 2
TP79
SW18
1 2
Key-Clock-b
Key-Latch-b
Key-Data-b
Silence-Switch
Trend
Lead-Select
On/Off-sw
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
SpO2 Pulse Rate Hundreds SpO2 Pulse Rate Tens
Temperature TensTemperature Ones Temperature Tenths
Temperature Hundreds
SpO2 Pulse Rate Ones
Degree FDegree C
Jim Belesiu
3/15/99Jim Belesiu
3/15/99 620008.dsn
LPP3/23/99JAC5-39251
L. Phillips
Z. Psenicnik
J. Bello
3/24/99
3/24/99
3/24/99
B No Load D16
D13 to Low Profile, R51 to 316C
5-39485 LPP LPP4/28/99
7/23/99LPP5-39994
620008 C
Temp/Pulse LED Drivers
C
3 5Friday, July 23, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
d36-dd36-c
u16-15
u16-6
u19-15
u19-3
u19-6u19-7
d39-dd39-c
u18-5
d38-dd38-c
d35-c
u15-6
u15-15
d35-d
d39-b
d35-g
d39-a
d38-g
d36-ed34-d
u19-out
d38-a
d35-f
d33-b
d34-e
d39-f
d36-bd35-b
d34-f
d34-ad34-b
d34-g
d38-b
d39-e
d34-c
d39-g
d35-a
d36-g
u15-9
d38-f
d36-a
d38-e
u18-9
d36-f
u14-9
u17-9
d35-e
u17-15
u17-4u17-5
d37-dd37-c
d37-e
d37-a
d37-g
d37-b
d37-f
u16-9
LED-Latch-1
u14-4
u14-6
u14-2
u14-15
u14-5
u14-3
u14-1u15-1
u15-5u15-4
d33-c
u16-3
u16-4
u16-2
u16-5
u16-1
u15-7
u17-1u17-2
u18-15
u18-3
u18-1u18-2
u18-6
u18-4
u19-1u19-2
u19-5u19-4
LED-Data-b
u17-3
u15-2u15-3
u17-6
d35-dp
d46-cu16-7d47-c
u14-7
u18-7
LED-TP-Enable
Clock2
VCC VCC
VCC
VCCVCC
VCC
VCC
VCC
VCC
VCCVCC
VCC
VCC
VCCVCC
R32150
23418
567
A
B
CD
E
FG
D38
7-SEG LED 0.36
45
1
8
7
910
2
6
3
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
R27150
23418
567
A
B
CD
E
F
G
D33
7-SEG LED 0.36
45
1
8
7
910
2
6
3
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
TP50
A
B
CD
E
FG
D39
7-SEG LED 0.36
45
1
8
7
910
2
6
3
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
TP35
A
B
CD
E
FG
D37
7-SEG LED 0.36
45
1
8
7
910
2
6
3
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
D46
T1.75 (5mm) Green
12
R35150
12345
678
R52215
U14
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
R53215
TP14
D47
T1.75 (5mm) Green
12
TP10
TP21
TP12
TP22
TP30
R28150
23418
567
TP52
TP25
R31150
12345
678
TP33
A
B
C
D
E
FG
D34
7-SEG LED 0.36
45
1
8
7
910
2
6
3
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
TP34
U16
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
TP38R34150
23418
567
TP37
R37150
12345
678
TP40
U19
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
TP61
U18
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
TP62
R36150
12345
678
TP63
R33150
23418
567
TP64
R30150
12345
678
TP42
U15
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
TP59
R26150
12345
678
TP60
R29150
12345
678
TP5
A
B
C
D
E
FG
D36
7-SEG LED 0.36
45
1
8
7
910
2
6
3
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
U17
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
A
B
C
D
E
FG
D35
7-SEG LED 0.36
45
1
8
7
910
2
6
3
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"LED_TP_Data_In
LED_TP_Data_Out
LED_TP_Clock
LED_TP_Latch
LED_TP_Enable
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
Diastolic Hundreds Diastolic Tens Diastolic Ones
BP Dia Hi BP Dia Lo
Systolic Ones
BP Sys Hi BP Sys LoNIBP Alarm On/Off
Systolic TensSystolic Hundreds
Q30Q60 QxQ1Q5 Q3Q10Q15
Jim Belesiu
3/15/99Jim Belesiu
3/15/99 620008.dsn
5.-39251 JAC 3/23/99 LPP
L. Phillips
Z. Psenicnik
J. Bello
3/24/99
3/24/99
3/24/99
B No Load D16
D13 to Low Profile, R51 to 316C
4/28/99LPP LPP5-39485
5-39994 LPP 7/23/99
620008 C
NIBP LED Drivers
C
4 5Friday, July 23, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
d44-ad44-bd44-c
d45-a
d45-cd45-b
d44-g
u20-4
d41-gd42-f
d41-a
d41-d
d42-g
u20-5
d44-e
d42-d
d41-bd42-a
d45-gd44-f
d42-c
u20-1
d41-e
d45-dd44-d
u20-6
u20-2
d45-f
d41-fu19-out
d42-b
d45-e
u20-15
u20-3
u20-out
u23-out
u22-out
u25-out
u21-out
d40-f
d40-bd40-c
d40-g
d40-a
d41-c
d42-e
d43-dd43-e
d43-gd43-fu23-1
u23-3
u24-15
u24-2u24-3u24-4u24-5u24-6
u25-2
u25-5d43-cd43-bd43-a
u23-4
u20-7 d15-c
Clock3
u23-2
u23-15
u23-5
u23-7
u21-7
d6-c
u21-3u21-2
u21-15
u21-5u21-4
u21-6u22-7
u22-1
u22-3u22-2
U22-15
u22-4
u22-6u22-5
d8-c
u25-7
d14-c
u25-1
u25-4u25-3
u25-15
u24-out
d11-c
u24-7
u24-1
u21-1
u23-6 u25-6
d30-ad31-a
u13-4
u13-7
u13-15
u13-3
u13-1
u13-6u13-5
u13-2
d24-a
d28-a
d22-a
d29-a
d25-ad26-a
u13-out
d40-ed40-d
LED-NIBP-Enable
LED-Latch-2
VCC
VCC VCC
VCC VCC VCC
VCCVCC VCC
VCCVCCVCC
VCC
VCC
TP93
D6
T1.75 (5mm) Green
12
D28
T1.
75 (
5mm
) G
reen
12
TP103
D8
T1.75 (5mm) Green
12
D26
T1.
75 (
5mm
) G
reen
12
R56215
D11
T1.75 (5mm) Green
12
D22
T1.
75 (
5mm
) G
reen
12
TP110
D14
T1.75 (5mm) Green
12
D24
T1.
75 (
5mm
) G
reen
12
TP111
R42680
12345
678
TP142
R57215
A
B
C
D
E
FG
D41
7-SEG LED 0.5
12
3
4
5
67
9
8
10
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
TP179
TP137
R40680
23418
567
TP141
TP118
A
B
C
D
E
FG
D42
7-SEG LED 0.5
12
3
4
5
67
9
8
10
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
R58215
R44680
23418
567
U24
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
TP116
U23
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
U25
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QHTP128
A
B
CD
E
FG
D43
7-SEG LED 0.5
12
3
4
5
67
9
8
10
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
R48680
12345
678
TP136
R47680
12345
678
R49680
12345
678
TP140
TP105
A
B
CD
E
FG
D44
7-SEG LED 0.5
12
3
4
5
67
9
8
10
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
TP126
TP89
A
B
CD
E
FG
D45
7-SEG LED 0.5
12
3
4
5
67
9
8
10
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
TP130
R542.15K
U21
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
TP180
TP112
U22
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
TP181
TP138
R38680
23418
567
U13
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
TP114
U20
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
D31
T1.
75 (
5mm
) G
reen
12
TP139
R43680
12345
678
R25150
12345
678
TP132
R41680
12345
678
R24150
12345
678
R591.21K
R39680
23418
567
TP1
R55215
R46
680
23418
567
TP8
TP91
D15
T1 (3mm) Red
12
D29
T1.
75 (
5mm
) G
reen
12
TP101
R45680
23418
567
D30
T1.
75 (
5mm
) G
reen
12
TP113
A
B
C
D
E
FG
D40
7-SEG LED 0.5
12
3
4
5
67
9
8
10
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
D25
T1.
75 (
5mm
) G
reen
12
LED_NIBP_Clock
LED_NIBP_Latch
LED_NIBP_Data_In
Silence-LED
LED_NIBP_Data_Out
LED_NIBP_Enable
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
Jim Belesiu
3/15/99Jim Belesiu
3/15/99 620008.dsn
HR Alarm
On/Off
SpO2 % Hundreds
ETCO2 Alarm
On/Off
SpO2 % Ones
SpO2 Bargraph
SpO2 % Tens
SpO2 Alarm
On/Off
SpO2 Lo
SpO2 Hi
3/23/99
3/24/99
3/24/99
3/24/99
L. Phillips
Z. Psenicnik
J. Bello
5-39251 JAC LPP
B No Load D16
D13 to Low Profile, R51 to 316C
5-39485 LPP LPP4/28/99
7/23/99LPP5-39994
620008 C
SPO2 LED Drivers
C
5 5Friday, July 23, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
u5-1
d9-c
u7-2
u12-4
d5-e
u12-7
d4-f
u12-out
d4-c
u7-out
d4-g
d27-15
u7-7
u6-5
u5-out
u13-out
u5-4
d12-c
u7-1
u6-3
u6-15
d5-c
d27-18
d27-11
d16-c
u7-6
u12-1
u5-2d5-d
d27-19
u7-5
d4-e
d27-20
u6-7
d5-g
d27-14
u5-15
d7-c
u7-15
d3-b
u6-2
Clock1
d5-b
d27-17
d27-12
u5-5u7-4
d4-ad4-b
u12-6
u12-2
u7-3
d5-f
d27-13
u5-3d3-c
LED-Latch-2
d4-d
d5-a
d27-16
d18-c
u6-6
u6-1
u6-4
u12-15
u6-out
LED-SPO2-Enable
u5-6
u12-5
u12-3
VCC
VCC
VCC
VCC
VCC VCC
VCC
VCC
VCC
VCCVCC
R21680
12345
678
D7T1 (3mm) Red
12
A
B
C
D
E
FG
D3
7-SEG LED 0.5
12
3
4
5
67
9
8
10
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
TP153
D9T1 (3mm) Red
12
TP151
R10680
43218
675
D12T1 (3mm) Red
12
U7
74HC595A
14
1110
1213
152134567
9
SER
SRCLKSRCLR
RCLKG
QAQCQBQDQEQFQGQH
QH
R63215
R69681
R64215
A
B
C
D
E
FG
D4
7-SEG LED 0.5
12
3
4
5
67
9
8
10
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
TP177
TP162
R23680
12345
678
TP175
U12
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
R9680
43218
765
TP155
U5
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
U6
74HC595A
14
1110
1213
151234567
9
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
R70681
R12680
43218
765
TP172
TP143
TP170
TP174
TP168
TP152
R13680
43218
765
R622.2K
43218
765
A
B
C
D
E
FG
D5
7-SEG LED 0.5
12
3
4
5
67
9
8
10
"E""D"
Anode-1
"C"
Dp
"B""A"
"F"
Anode-2
"G"
D27
10 LED Bargraph
21
5678910
34
11121314151617181920
D18
T1.75 (5mm) Green
12
TP149
D16
No Load
12
TP173
TP176
LED_SpO2_Clock
LED_SpO2_Latch
LED_SpO2_Data_In
LED_SpO2_Enable
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
Zero Adjust
Size Adjust
Vertical Amplifier
Horizontal AmplifierGrid Voltages
Video Amplifier
Break Away CRT socket Board
6 Position flat ribbon cableConnects Main CRT to CRTsocket Board
Ramp Generator
750uSec
16.7mSec
Vertical Sync
5.5uSec
31.7uSec
Horizontal Sync
To Yoke
Unused
BrightnessAdjust
FocusAdjust
1/2W Carbon Comp
To MainBoard
5-39097 JAC 3/9/99 LPP
Rick Myers
Rick Myers
Mar 4 1999
Mar 4 1999
620011.dsn
L.Phillips
Z.Psenicnik
J.Bello
3/9/99
3/9/99
3/9/99
Modify Video AmplifierReduce RF Emissions
ZIP4/15/99JJC5-39339
CIncrease Flex Cable to3 inches 5-39831 6/24/99LPP
D
Width Coil (L3)inductance rangechanged
Width Coil Inductance(L3) increased
B
LPP
5-40006 LPP 7/23/99
REV Description ECN/ECO Init Date Ckd
A Release to Production
620011 D
CRT Deflection Board
C
1 1Friday, July 23, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
U4.2
U1.2
u1.7
u1.6
u1.5
vcadj+ vcadj-
vadj
U1.3
u2.2
ramp
q4.b
q3.b
u2.7 u2.6
vert-
hlin hwide
+12filt
q5.c
q5.b
hor+
vert+
q1.b
q1.e
J3.5J3.6
tube.g4
u4.4
q2.b
q6.d
vcadj
d6.c
Boost
Hor
+B
d5.c
Focus
Vg1
Vd
Vg2
d4.a
J3.1
u4-6
Grid2
C22-2
Video
HsyncVsync
Grid1
vidout
tube.vd
tube.g2
J3.3 tube.12V
tube.g1
tube.gndtube.g1
j2-3
hor-
q7-g
q8-b
q8-e
u2.1
+Vvid
+Vvid
+5V
+5V
+5V
+5V
+5V
+5V
+12V
+12V
+12V
+12V+12V
+12V
+12V
+12V
+12V
+12V
L315- 35uH
E1
21
R2410K
D61N4148
12
+ C13
22uF
Q6IRF640
2
1
34
D31N4935
1 2
R2819.6K
R43
5.11K
E2
21
D51N4937
1 2
J1
CON6
123456
R323.7K
D41N4935
12
D2
MUR120
1 2
C14.01uF
R15 38.3
R17 10C1.1uF
R9
1.47K
D11N4148
12R2310K
R45 330
To CRT
AnodeT1CRT-FBT
10
9
7
1
3
5
2
8
J4
CRT-Socket
1234567
U4F
74HCT04
13 12
C17.01uF
D71N4148
12
U4C
74HCT04
5 6
R10 1K
R5119.6K
U4E
74HCT04
11 10
C16.01uF
R741.2K
Q7BS170
1
2
3
+
- U2AMC34072
3
21
84
R16 10
J3
Flex6
123456
R11K
R44 330
U4B
74HCT04
3 4
R27.50K
R261K
R11
1.96K
R501.96K
U3MC78L05ACP
3 1
2
VIN VOUT
GN
D
R29 100K
+
-
U1BTLC272
5
67
84
C7.047uF
R25215
R12562
C6.047uF
R371.96K
C15.01uF
C8.022uF
J3x
Flex6
123456
R361.96K
C19.01uF
C96.8uF
R48100
R841.2K
L1
47uH
R641.2K
R41681
R13169
R2710
C2100pf
J2
CON5
12345
C3.047uF
R18562
Q2MPSW51A 3
2
1
C18.047uF
C20No Load
Q1MPSW01A
3
2
1
R521.96K
R14562
C22.022uF
R30100K
+ C1222uF
R20169
Q82N3904
3
2
1
Q4MPSW51A3
2
1
R3110K
E5
21
Q3MPSW01A
3
2
1
R21562
U4D
74HCT04
9 8
R19562
+
- U1ATLC272
3
21
84
+
-U2BMC34072
5
67
84
R2210K
C4.047uF
+ C522uF
U4A
74HCT04
1 2
R47 47K
E4
21
R46 47K
+C111000uF
R410K
+C101000uF
R542.2K
Q52N3904
3
2
1
E3
21
L215uH
R322.5Meg
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
PrintheadOn/Off Switch
TemperatureAmplifier
ThermistorInput
+24V Boost(23.6 V nominal)
1
2
3
4
phase +
Connector Pin #
1 3 4 6
+
+ +
+ +
++
PrintheadConnector
Rick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
620014.dsn
5-39179 JAC 3/18/99 LPP
L.Phillips
Z. Psenicnik
J. Bello
3/22/99
3/19/99
3/19/99
REV Description ECN/ECO Init Date Ckd
A Release to Production
620014 A
Printer Electronics
C
1 1Monday, March 22, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
Rec-Data
U2-fb
Rec-Data-Latch
Q4-D
Rec-Supply-On
U2-comp
U3-10
U1-1
Q4-
G
U1-2
Rec-StrobeRec-Clock
U2-
Isen
se
+12V
Q6-e
U2-
out
U3-8
Q4-s
U3-9
Strobe
+24V-switch
ClockLatch
Strobe
Data
u3-clk
Rec-Motor-Step
clk
data-IO
U3-7
U2-RT
J3-6
u6-6
J3-3J3-4
u6-clmp
u6-14u6-11
J3-1
u6-3
U3-5
U3-6
d6-c
Thermistor2Thermistor1
U1-3
q1-g
Q2-b
U3-3
n24Von
U2-Ref
Vpp
Vpp
u1-7
Rec-Temp
+5V
+12V
+5VRecVdc
+24V
RecVdc
+12V
D
+5V
+5V
D
+5V
D
+5V
D
+5V
D
+5V
+5V
D
+5V
D
D
A
A
A
A
A
A
A
A
A
A
A
A
AA
A
A
A
+24V
A
+5V
D
A
D
A
+24V
A
A A
A
A
A
+5V
+5V
+5V
A
A
C142200pF
TP27
Q4MTP30N06VL
23
1
4
U5C74HCT04
5 6
147
C18.047uF
U5B74HCT04
3 4
147
R224.22K
U5E74HCT04
11 10
147
TP29
C11.047uF
R193.16K
TP28
Q6MMBT3904L
3
1
2
R1310
R610K
TP14
R15147
R1619.6K
TP8
D3
BAV99L
1
3
2
R21K
TP10
R8 23.7K
R361.47K
TP24
Q2MMBT3904L
3
1
2
+ C61uF
R1410K
TP67
J3
CON6
123456
+ C41000uF
TP66
C3.01uF
+ C81800uF
C5 .01uF
TP68
L122uH
TP17
C2.01uF
R784.5K
C135600pF
R910K
R51K
C10.1uF
D2MBRS340T3
U5F74HCT04
13 12
147
D627V
13
U6ULN2065
36
1114
27916
18
1B2B3B4B
1C2C3C4C
CLMP1CLMP2
R241.96K
U2UC3843A
3
57
14
1
10
812
911
VFB
ISENSERT/CT
VREF
COMP
OUT
PW
R-G
ND
Vcc
GN
DV
c
TP9
C12.047uF
R18no-load
TP21
TP1
R351.47K
TP3
Q32N7002
3
1
2TP19
R1210K
+
- U1BMC34072
5
67
84
J2
CON16
12345678910111213141516
TP23
C21.047uF
R331.47K
R310K
+
- U1AMC34072
3
21
84
U3
PIC16C505
2
5
7
4
3
6
1 14
8
9
10
11
12
13ClkIn/Osc1/RB5
RC5/TOCK1
RC3
Vpp/MCLR/RB3
Clkout/Osc2/RB4
RC4
Vdd
Vss
RC2
RC1
RC0
RB2
RB1
RB0
TP6
Q1
MTP30P06V
2
1
34
R115.11K
C19.047uF
D127V
13
C1.047uF
+C2047uF
U5D74HCT04
9 8
147
U5A74HCT04
1 2
147
R1010K
C7.01uF
TP54
TP26
R341.47K
J1CON24A
1357911131517192123
2468
1012141618202224
R170.1
R151.1K
R49.09K
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
Front PanelDisplay Connector
Main PCAConnector
Recorder BoardConnector
CRT BoardConnector
EKG - Page6
Speaker Drive
SerialDataOut
4Vpp max.
NIBP - Page 2
SpO2 - Page4
EKG - Page4
To PIC
CO2 BoardConnector
Serial IO - Page8
Page1
(Front Panel Key)
(To Processor)(To U2)
(pg 3)
(pg 1)
FanConnector
620017.dsnRick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
5-39121 JAC 3/15/99
L. Phillips
LPP
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/16/99
B See ECN worksheetRecorderESD Ground
D
Improvements for ESD, RFI,and Fast Transients, CorrectRespiration Diff-Amp Topology
5-39455 LPP LPP4/27/99
5-39821 LPP 6/24/99
E
Mods to U2 clock line, Resp gainamp, ECG supply, and NVRAMpullup
Jumper wirefrom J4-20 toJ4-55
5-39936 LPP 7/9/99
LPP
620017 E
Main Board - Model 220
C
1 8Tuesday, July 13, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
Key-Data
U7-wc
SPI-Data-Out
Spare-3
NIBP-15mmHgNIBP-Data
Spare-2
SCL
Video-Data
SCD
SPO2-Tx
LED-Data-b
NIBP-Safety
Video-Data
HRESET
NIBP-OP
Video-VSync
Video-HSyncVideo-VSync
Video-HSync
Speaker-Audio
SPI-data-in
SPO2-Rx
SPO2-Rx
NIBP-PWM-ADC
NIBP-Valve-CloseVbackup
RS232-CTS
EROM-wr
ETCO2-Tx
FE-Clock
EKG-Data-Clock
PIC-Data
LED-Latch-b
LED-Latch
Key-Latch-n
ETCO2-Rx
RS423-Rx
RS423-Tx
Nurse-Call
Batt-ID
q2-c
Q1-e
+3.3V
Q2-b
ACON-LED
PIC-audio
NIBP-Offset-DACNIBP2-PW-ADC
LED-Data
Key-Latch-n-b
LED-On
LED-On
PIC-Clk
uP-RESET
SPI-Clock
Key-clock
Key-Clock-b
Rec-Clock
Rec-Motor-Step
Rec-Clock
Rec-Data-Latch Rec-Strobe
Rec-Data-LatchRec-Strobe
PIC-Vprog
Rec-Data
Rec-Motor-StepRec-Supply-On
Audio-Shutdown
SMR17-1
U9-
4
SP
U9-3
Audio-Shutdown
EKG-ADC-Clock
Power-Sync
ADC-Clock
EKG-PWM-ADC
Power-Sync
FE-Data
FE-DataVbackup
FE-Data-Clock
FE-ADC-Clock
FE-Data-In
+12V
NIBP-15mmHgNIBP-Safety
NIBP-PWM-ADCNIBP-Offset-DAC
NIBP-ADC-Clock
NIBP-Overpressure
NIBP-A/D-SelA
SpO2OutNIBP-Valve-Close
NIBP-Pump-On
NIBP-A/D-SelBNIBP-A/D-SelC
FE-Pwr-Sync
On/Off-Key
ac-on
+3.3V
U2-Reset
PIC-Data
RS423Rx
RS423Tx
NurseCall
AC+12V
Rec-GND
Battery
+3.3V
ac-on
AC+12V-fuse
ACON
+12V
Rec+DCV
Rec-GND
Rec-GND
Rec+DCV
Rec-GND
+12V
PIC-Clk
U2-Reset
PIC-Data
HRESET
Vbackup
On/Off
Batt-ID
On/Off-Key
Print-Temp
+5V
Rec-Supply-On
Rec+DCV
FE-PWM-ADC
+5V
+3.3V
+5V
D
D
D
D
D D
D
D
D
D
DD
D
D
D
D
D
D+5V
D
+5V
D
+5V
DD
+5V
DD
DD
+5V
A D
+3.3V
D
DD
+5V
+5V
D
D
+5V
+3.3V +5V
+5V
+5V
D
D
D
D
+5V
D
+5V
+12V
+5V
D
D
+5V
D
D
+5V
+5V
+5V
J1
CON7
1234567
C3220pF
J9
Tab-.187
12
U1B74HCT04
3 4
147
U8F74HCT04
13 12
147
C370.1uF
U1C74HCT04
56
147
TP14
TP13
TP15
+ C7330uF
U8C74HCT04
5 6
147
+
-
U9TPA301
3
41 6
728
5
C8.047uF
TP12
J4
Socket 30x2
13579
11131517192123252729313335373941434547495153555759
24681012141618202224262830323436384042444648505254565860
1357911131517192123252729313335373941434547495153555759
2468
1012141618202224262830323436384042444648505254565860
U8A74HCT04
12
147
R21.96K
TP18
R1919.6K
R410K
U3D74HCT08
12
1311
147
J8CON14AP
135791113
2468
101214
+++++++
+++++++
U274HCT595
14
1110
1213
151234567
9
168
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
VC
CG
ND
R519.6K
+
C364.7uF
U3A74HCT08
1
23
147
C22.047uF
TP17
C39.047uF
J6
CON6
123456
J2
CON3
123
TP23
C1.047uF
TP24
Q2MMBT3904L
3
1
2
U1A74HCT04
12
147
C20.047uF
R151.96K
J5
CON2
12
TP16
C23.047uF
C29.047uF
R163.48K
U3B74HCT08
4
56
147
TP19
Q32N7002
3
1
2
R2110K
TP1
U8D74HCT04
9 8
147
J11
CON3
123
TP2
TP22
R61.96K
TP20
TP3
R310K
TP21
TP4
R110K
U1F74HCT04
13 12
147
J3
CON4
1234
R2010K
+ C411uF
TP26
C40.047uF
Q1MMBT3906L
3
1
2
+ C4330uF
R2210K
U8E74HCT04
11 10
147
U1D74HCT04
9 8
147
TP11
C14.047uF
C5.047uF
U10
D620361-MX10000
2
5
7
4
3
6
1 14
8
9
10
11
12
13ClkIn/Osc1/RB5
TC5/TOCK1
RC3
Vpp/MCLR/RB3
Clkout/Osc2/RB4
RC4
Vdd
Vss
RC2
RC1
RC0
RB2
RB1
RB0
R231.21K
U3C74HCT08
9
108
147
C42.047uF
R241.21K
U1E74HCT04
11 10
147
U8B74HCT04
3 4
147
TP7
C38220pF
C30
.047uF
TP9
TP5
U7AT24C02N-10SC-2.7
123
6
7
5
84
A0A1A2
SCL
WC
SDA
VC
CG
ND
TP25
TP10
J7
CON24A
1357911131517192123
2468
1012141618202224
TP6
+
C354.7uF
TP8
R251.21K
R1719.6K
R181.21K
C2.047uF
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
A/D Mux
Zero Adjust+/-20mmHg range
PWM A/DConverter
0mmHG = 0.5V 300mmHG = 4.0V
PWM D/A76.8KHz
PrimaryTransducer
NIBPPWM A/DConverter
ZeroOffset
SafetyTransducer
Over PressureFault Circuit
620017.dsnRick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
3/15/99JAC5-39121 LPP
L. Phillips
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/16/99
B See ECN worksheet
DImprovements for ESD, RFI,and Fast Transients, CorrectRespiration Diff-Amp Topology
5-39455 LPP 4/27/99 LPP
6/24/995-39821 LPP
EMods to U2 clock line, Respgain amp, ECG supply andNVRAM pullup
7/9/99LPP5-39936
LPP
REV Description ECN/ECO Init Date Ckd
A Release to Production
620017 E
NIBP ELECTRONICS
C
2 8Tuesday, July 13, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
D201-C
U208-2
U210-7
U204-7
U204-5
U203-3
U203-5
C207-1
U204-3
U204-2
U205-7
U206-6
U206-1
P202-Out-U206-7
U206-2
U202-3
P202-2
P202-5
U202-5
U208-1
u207-9
PrimaryPres
P4.25V
SafetyPres
U208-3
P201-Out
P201-6
U204-1
U208-7
U209-Out
U203-6
P202-Out+
U210-2
U210-3
U203-2
Q201-B
P.75V
+5V/2
U205-3
Q202-G
Pump-Pump+D
201-
A Valve-Valve+
U207-3
P201-pwr
NIBP-Offset-DAC
NIBP-ADC-Clock
P+.75V
NIBP-Safety
NIBP-PWM-ADC
P+12V
5VRef
NIBP-Overpressure
NIBP-15mmHg
Print-Temp
NIBP-A/D-SelB
+12V
+3.3V
+5V
P+.75V
NIBP-A/D-SelA
NIBP-A/D-SelC
BattCurrentBattVoltage
+5V +Vpump
NIBP-Pump-OnNIBP-Valve-Close
P+5V
P+5V
P+5V
P+5V
P+5V
P+5V
P+5VP+5V
P+5V
P+12V
P+12V
P+12V
P+12V
P+12V
+3.3V
+3.3V
P+12V
P+12V
P+12V
P+12V
P+12V
P+12V
+12V
P+12V
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
AA
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
AA
A
A
A
A
+
- U203ALM393
3
21
84
C215.047uF
+
-
U202AMC34072
3
21
84
C225.047uF
C2241000pF
U20178L05
8 1
2 3 6 7
IN OUT
GN
D
GN
D
GN
D
GN
D
TP214
R2333.48K
+
-
U208AMC34072
3
21
84
TP206
R2213.16K
C213.01uF
R23210K
R23010K
+ C2024.7uF
R24210K
C222.01uF
+
-
U205BMC34072
5
67
84
R23173.2K
TP217
Q201MMBT3904L
3
1
2
+
-
U206BMC34072
5
67
84
C223.01uF
TP225
D202BAV99L
1
3
2
R24010K
R2353.48K
R2291.96K
+
- U203BLM393
5
67
84
R24110K
R237464K
D201MMBD1503A
1
3
2
L201220uH
TP228
C220
.01uF
R243100KGain
and
Comp
XFPM-050KPGR-P1P201
1
2
3
6
+
-
U202BMC34072
5
67
84
TP207
U207B74HCT00
4
56
147
TP231
TP210
C232.047uF
+
-U210MAX941
2
3
61 4
7
5
C201.047uF
TP211
TP201
TP204
+C22910uF
TP237
C212680pF
TP240
TP232
C221.047uF
Q202MMDF2N02E
81
2
5 67
3
4
TP234
C205
.047uF
R21410K
C209.047uF
TP226
R2191.96K
C211
.047uF
R24631.6
C226.047uF
C216.047uF
R215100K
C231.01uF
U207A74HCT00
1
23
147
C204.047uF
TP221
C227680pF
TP222
+ C2071uF
R21619.6K
+
-
U204BMC34072
5
67
84
R2391K
R201576
+C2081uF
+
-
U204AMC34072
3
21
84
C203
.047uF
TP235
TP224
R2033.32K
R205750
C210.047uF
TP212
TP208
R24421.5K
TP213
C206.047uF
TP215
TP220
L202Bead
+
-
U208BMC34072
5
67
84
R2275.11K
R2363.83K
J201
CON5
12345
TP219
R22321.5K
U207C74HCT00
9
108
147
R2221K
R228
1.96K
R2241K
C230.047uF
U207D74HCT00
12
1311
147
TP239
TP236
R2251K
+
-
U205AMC34072
3
21
84
TP202
R2111.96K
R22621.5K
R2081.96K
C217
.047uF
-+
FPNS-07PGRP2022
13
5
6
+C2184.7uF
C219.047uF
C228.047uF
R2471K
TP209
R204150
R2481K
R21823.7K
R202174
R2175.62K
R21256.2K
R2343.48K
+
-
U206AMC34072
3
21
84
R213237K
Q203MMDF2N02E
81
2
5 67
3
4
R2091K
TP227
TP216
R207464K
TP229
R220806
R210464K
U2094051
131415121524
611109
3
168 7
X0X1X2X3X4X5X6X7
INHABC
XVD
DV
SS
VE
E
TP233
TP238
TP203
R2061K
TP230
C214.047uF
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
IsolationBarrier
Isolated SpO2Circuits
Grounded SpO2Circuits
Nonin SpO2Connector
Nellcor SpO2Connector
620017.dsnRick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
3/15/99JAC5-39121 LPP
L. Phillips
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/16/99
B See ECN worksheet
SpO2 ESDGround
D
5-39455 LPP LPP4/27/99
Improvements for ESD, RFI,and Fast Transients, CorrectRespiration Diff-Amp Topology
6/24/99LPP5-39821
EMods to U2 clock line, Resp gain amp, ECG supply andNVRAM pullup
7/9/995-39936 LPP
LPP
REV Description ECN/ECO Init Date Ckd
A Release to Production
620017 E
Power Isolation and SpO2 Interface
C
4 8Tuesday, July 13, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
U402-1
C409-1
T401-4
Q40
1-g
U402-sen
opto-fb
iso401-a
Q40
2-e
Q401-s
U401-1
C408-2
U401-2iso401-b
sSpO2tx
Q403-e
sSpO2tx
U402-e
U402-ref
U402-rt
iso402-a
U401-5
U401-3
U403-fb
f-V
f+V T401-1
T401-8
U401-7
R419-2
U402-ct
U411-6
FE-Pwr-Sync
SpO2Out
+5V
+12V
+12V
s+5V
f+V
+5V
fVcc
fVee
f+5V
f+V
SpO2-Reset
s+5V
iso+5Vdig
s-5V
s-5V
s+5V
iso+5Vdig
s+5V
f+V
S
S
S
S
S S
iso+5Vdig
S
S
S
S
ED
ED
SS S
S S
S
SS
S
SSS
S
S S
S
S
S
S
S
ED SE
S
S
S
S
+ C43110uF
TP451
TP459
J403
Tab-.187
12
+
-U401BLM358
5
67
84
+ C43210uF
TP466
TP462
+
- U401ALM358
3
21
84
TP464
R405215
TP455
R4235.11K
C404.047uF
C409470pf
C4361000pF
R4141.96K
T401
IsoXfmr
5
8
1
2
3
4
TP463
C4112200pF
TP452
C401.047uF
C403.047uF
TP460
R42410K
R41710K
TP449
TP461
+C406100uF
C417680pF
TP453
R415100
TP467
TP465
TP454
C430.047uF
R412196
+C407100uF
D403
MBRS130T3
U40778L05
81
2367
INOUT
GN
D
GN
D
GN
D
GN
D
R404196K
TP450
D401MBRS130T3
C416.047uF
R40110K
+C405100uF
+ C43410uF
L401220uH
U4104N25
1 6
2
5
4
TP468 L402220uH
J402
CON14AP
13579
1113
2468101214
+++++++
+++++++
TP456
C429.047uF
C402.047uF
C420.047uF
R4115.11K
R40710
U411HCNW4503
2
3
8
6
5
D405BAV99L
1
3
2
R4031K
R4095.11K
R408100
TP457
C410.01uF
+ C43510uF
U40479L05
21367
5
INOUTININING
ND
C413.047uF
R4060.2
J401
CON4
1234
R419215
C414.047uF
U403LP2951C
873
62
15
4
VINFDBK
SHTDN
TAPSENS
VOUTERR
GN
D
R4107.5K
TP469
+ C4184.7uF
R42210K
C433470pf
U402
LM3524DM
12
16
15
945
10
67
12111314
3
8
V-V+
VREF
VIN
COMP+SENSE-SENSE
SHTDWN
RTCT
CAEACBEB
OSCOUT
GN
D
+ C41210uF
Q402MMBT3906L
3
1
2
TP458
C408.01uf
R40210K
+ C41910uF
Q403MMBT3904L
3
1
2
C422.047uF
R41610K
+C4151uF
Q401MTD3055V
23
1
4
C424.047uF
+ C421
1uF
+ C42810uF
C427.047uF
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
RespirationDriveCircuit
RespirationDiff Amp
B.W. = .06Hz to 16 Hz Gain =1000B.W. = 10Hz
IsolationBarrier
U702 U703
620017.dsnRick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
5-39121 JAC 3/15/99 LPP
L. Phillips
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/16/99
B See ECN worksheet LPP LPP5-39455 4/27/99
DImprovements for ESD, RFI,and Fast Transients, CorrectRespiration Diff-Amp Topology
LPP5-39821 6/24/99
Mods to U2 clock line, Respgain amp, ECG supply andNVRAM pullup
E 5-39936 LPP 7/9/99
LPP
REV Description ECN/ECO Init Date Ckd
A Release to Production
620017 E
Respiration
C
7 8Wednesday, July 14, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
U702-6
U702-2
U702-1U702-3
D70
3-1
Q701-d
Q70
1-g
U703-5Resp-AC
U703-6
D703-3
D701-3
D702-3
C701-1
C702-1
iso701-a
RespDr+
RespDr-
U70
3-2
d705-c
U702-7
resp-clk u710-6
D704-3 U702-5
Resp-Reset
An-Resp
-Clamp +Clamp
Right-Arm
Left-Arm
f+5V
Resp-DC
fVcc
fVee
f+5V
FE-Pwr-Sync
+5V
iso+5Vdig iso+5Vdig
Resp-Off
E
E EE
E
E E
E
E
E
E
E
E
ED
fVcc
fVcc
fVcc
fVeefVee
fVee
E
EE
E E E
E
E
ED
fVee
fVcc
C717.047uF
TP712
C715.047uF
C7011000pF
R720100K
C716.047uF
C7021000pF
C7130.1uF
C718.047uF
R7153.16K
TP708
D705MMBD354LT1
1
3
2
TP707
TP705
TP717
TP713
+
- U703BAD712
5
67
84
+
-
U703AAD712
3
21
84
TP702
U701B74HC74
12
11
9
8
14 10
7 13
D
CLK
Q
Q
VC
C
PR
GN
D
CL
R7052.15K
+ C7194.7uF
R71115.8K
C714.047uF
TP703
D706MMBD1503A
1
3
2
R7121K
R7131K
U710HCNW4503
2
3
8
6
5
C7123.3uF
TP704
C706330pF
R71415.8K
R7163.16K
R718825K
R7173.16K
R71951.1K
R709464K
R721316K
R722316
U701A74HC74
2
3
5
6
144
71
D
CLK
Q
Q
VC
C
PR
GN
D
CL
D701MMBD1503A
1
3
2
R7071.96K
D702MMBD1503A
1
3
2
+
-
U702B
AD7125
67
84
D703MMBD1503A
1
3
2
C707330pF
D704MMBD1503A
1
3
2
TP720
C7050.1uF
Q701MMBF4393L
2
3
1
TP723R7011.96K
TP709
C7110.1uF
R7021.96K
R706215
TP701
TP711
TP706
R710464K
TP716
TP710
R7081.96K
+
- U702AAD712
3
21
84
TP721
R70331.6K
TP718
R70431.6K
TP714
R7252.15K
TP722
TP719
C721100pF
C720.047uF
R7231Meg
R724196K
TP715
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
On/Off Switch
+12V Boost(12.1V nominal)
Float Voltage
On/Off Circuit18V Boost - Mosfet Gate Voltage
Current Limit(1.5 Amp)
+5V LinearLowDropout
BatteryCharger
HeatsinkforQ312
Ibatt=0: BattCurr=0.74V
Ibatt=1.5: BattCurr=2.87V
Heatsinkfor D301
620017.dsnRick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
5-39121 JAC 3/15/99 LPP
L. Phillips
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/16/99
B See ECN worksheet LPP LPP5-39455 4/27/99
DImprovements for ESD, RFI,and Fast Transients, CorrectRespiration Diff-Amp Topology
5-39821 LPP 6/24/99
EMods to U2 clock line, Respgain amp, ECG supply andNVRAM pullup
5-39936 LPP 7/9/99
LPP
620017 E
DC/DC Power Supplies
C
3 8Tuesday, July 13, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
U30
4-1
Q30
6-b
U301-ct
U30
5-1
U302-pwr
Q302-c
U305-6
Q305-d
Q307-e
Q308-d
U302-comp
U302-fb
U304-5
C324-2
U302-ct
Q31
0-b
U304-3
Q30
5-s
U303-ct
Q304-e
RT
301-1
U303-5 U305-pwr
R339-2
Bat-Adj
U304-7
U30
5-2
Q306-c
D307-A
U302-sense
U305-3
Bat-fuse
U30
2-ou
t
Q308-g
U304-2
V+18V
I-Batt
Q309-3
U304-6
C319-1
Q312-g
U301-comp
Q309-b
U305-5
C305-1
D312-c
Q313-d
Q314-d
U301-sw
U30
3-ou
tU301-pwr
U301-7
Q30
5-g
u307-6
Batt-fb
U303-fb
U303-cp
D304-C
L302
-1
Q303-s
Q302-B
Q301-b
C33
9-1
Q310-c
D309-a R343-1
F302-2 AC+12V-fuse
5VRef
5VRef
Ref-Batcharge
+12V
ACON
ACON
Ref-Batcharge
Battery
On/Off
+5V
AC+12V
+Vpump
Ref-Batcharge
VBackup
+3.3V
BattVoltage
BattCurrent
AC+12V-fuse
AC+12V-fuse
AC+12V-fuse
AC+12V-fuse
Rec+DCV
+Vfuse
+12V
+12V
D D
DDDD
+12V
D
+5V
TP340
TP321
Q305
MTP30N06VL
23
1
4
TP335
U306LF33CV
1 3
2
IN OUT
GN
D
C326.01uF
D301MBR2535CTL
1
324
+ C323100uF
R33319.6K
TP322
+ C325100uF
R34710K
D308 BAV99L
1
3
2
C322.047uF
TP345
R350
10K
Q312
MTP30N06VL
2 3
1
4
L305Bead
TP302
R30661.9K
TP341
D302BAV99L
1
3
2
F303
4Amp
R33919.6K
+ C3314.7uF
TP323
TP304
D3035.1V
13
C3055600pF
+
-
U305BMC34072
5
67
84
+ C3061uF
R3354.32K TP355
+ C3324.7uF
TP348
TP331
R31110K
TP328
R34910K
TP307U301MC34063AD
53
78
1
26
4
COMPTCAP
IPKIDC
ISWC
ISWEVcc
GN
D
TP315
Q310MMBT3904L
3
1
2
D309BAV70L
1
3
2
TP346
R34110K
+
-
U304AMC34072
3
21
84
TP330
D310MBRS340T3
TP306
C333.047uF
C314.047uF
R33219.6K
+ C3121000uF
R31919.6K
R3535.11K
C307.047uF
C337.047uF
HS302
6078
R331
33.2K
R3021.96K
Q311MTP30N06VL
23
1
4
R30110K
+C3191000uF
R31010K
TP332
C3241000pF
U302UC3843A
3
57
14
1
10
812
911
VFB
ISENSERT/CT
VREF
COMP
OUT
PW
R-G
ND
Vcc
GN
DV
c
D312BAV99L
1
3
2
C340.047uF
TP316
R3123.83K
D313NO LOAD
1
3
2
R304100K
R35514.7K
TP350
TP305
+C3021uF
R3270.1
C3095600pF
+
-
U305AMC34072
3
21
84
+ C3101000uF
L30222uH
D304MBRS340T3
L306Bead
R3251.96K
R34410K
TP329
R3074.64K
TP347
R338
1K
13
2
+ C301330uF
U303UC3843A
3
57
14
1
10
812
911
VFB
ISENSERT/CT
VREF
COMP
OUT
PW
R-G
ND
Vcc
GN
DV
c
R32210K
R32410K
L30447uH
R31810K
t
RT30110K
R34010K
Q307MMBT3904L
3
1
2
U307
LP2951CD-3.3
873
62
15
4
VINFDBKSHTDN
TAPSENS
VOUTERR
GN
D
Q313
2N7002
3
1
2
R3291K
R3378.87K
Q314
2N7002
3
1
2
F3014Amp
D311BAV70L
1
3
2
R33419.6K
Q306MMBT3904L
3
1
2
R315196
R33033.2K
Q304MMBT3904L
3
1
2
D305BAV99L
1
3
2
C338.047uF
C335.047uF
TP336
Q301MPSW51A
3
2
1
C3162200pF
+ C3391uF
C327.047uF
+ C329100uF
R34510K
D306MBRS340T3
Q309MMBT3906L
3
1
2
R30351.1K
TP339
C330.047uF
+
-
U304BMC34072
5
67
84
+ C318330uF
TP337
Q302MMBT3904L
3
1
2
D307MBRS340T3
TP326
R3525.11K
R323 1.96K
TP324
C328.047uF
R3131.96K
R32610
TP354
+ C304100uF
R3545.11K
+ C3111000uF
TP317
R31410
TP313
TP311
R3515.11K
C315.047uF
R34810K
TP338
Q308
MTP23P06V
2
1
34
TP320
R346100
TP351
Q303
MTP30N06VL
2 3
1
4
TP318
TP343
F3024Amp
R34219.6K
TP314
TP352
TP342
C334.047uF
C303470pf
R3094.64K
TP312
C321.01uF
TP349
TP333
R3207.5K
C336.047uF
L303Bead
C320.01uF
R3367.5K
R3177.5K
+ C313330uF
R34310K
TP309
R3051
C3082200pF
TP308
R3160.1
R32127.4K
R3281K
L3011mH
TP344
TP310
TP319
R30817.8K
HS301
6078
TP353
TP334
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
0.1%
0.1%
0.1%
0.1%
0.1%
0.1%
0.1%
0.1%
0.1%
0.1%
Defib ProtectRFI Filtering
Input BuffersGain = 9.26
WilsonNetwork
Lead Select
Diff AmpGain = 1
High Pass (0.05Hz or 0.5Hz)Low Pass (150Hz) Gain Stage
Gain = 74
RLD Amp
A/D InputsLeads Off
U501 U502 U503 U504 U505 U506 U507 U508
Shield 0.1%0.1%
620017.dsnRick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
5-39121 JAC 3/15/99 LPP
L. Phillips
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/16/99
B See ECN worksheet
D
4/27/995-39455 LPP LPP
Improvements for ESD, RFI,and Fast Transients, CorrectRespiration Diff-Amp Topology
5-39821 LPP 6/24/99
Mods to U2 clock line, Respgain amp, ECG supply andNVRAM pullup
E LPP5-39936 7/9/99
LPP
620017 E
ECG Amp
C
5 8Wednesday, July 14, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
U501-6
U502-3
U502-2
U502-5
U503-2
Right-Arm
aVRaVLaVF
LA
LA
LLLL
LALLV+
RA
RA
RA mux-
mux+diff+
U508-3
Q504-d
diff-
ecg-hp
D503-3
-clamp
D501-3
U501-5
U501-2
C514-2
U503-5
R509-1
R511-1
R513-1
R515-1
Left-Arm
Left-Leg
V-Lead
Right-Leg
U501-3
Q504-s
Q504-g
+clamp
U502-6
V-
U508-5
c539-1
c541-1
c538-1
c540-1
U508-6
u509
-4
diff-out
u501
-8
u508-2
D502-3
RL-mux
D504-3
D505-3
Q50
1-S
Mux-LdS-A
Sw-MonBw
Mux-LdS-B
Mux-LdS-C
RA
LA
LL
V+
VLdsOff
VLdsOff
VLdsOff
VLdsOff
VLdsOff
f+1.24V
fVcc
fVee
f+5V
vRL
+clamp
-clamp
Right-Arm
Left-Arm
An-ECG
Sw-RLD-RA
Sw-RLD-LA
Sw-RLD-LL
Sw-RLD-RL
Sw-RLD-V
fVcc
fVcc
fVee
fVee
fVcc
EEE
E E E
E
E
E
E
E
E
E
E
E
EE
E
E
E
E E E E E
EEEEE
E
E
E
E
E
E
E
E
E
E
E
E
E
E
E
S
S
S
S
S
E
E E
E
E
E
fVeefVee
fVee
E
fVcc
fVcc
fVcc
fVee
fVcc
fVcc
fVcc
fVee
fVee
fVee
fVee
fVcc
fVee
fVcc
fVcc
fVee
fVcc
fVee
fVcc
fVee
fVee
fVcc
R50610K
C520.047uF
TP542
R55922Meg
R51710K
R50710K
R55530.1K
C530.047uF
C525.047uF
TP505
+
-
U507BMC34002
5
67
84
R556
10K
C526.047uF
C506220pF
C543.047uF
+
-
U507AMC34002
3
21
84
C517.01uF
TP539
C528.047uF
N501LAMP NEON
Q5042N7002
3
1
2
R54410K
TP501
C532.047uF
R50151.1K
TP557
R56134.8K
D502MMBD1503A
1
3
2
C527.047uF
C501220pF
R56334.8K
TP538
R54710K
C531.047uF
R50810K
R562464K
C536.01uF
R549110K
TP540
TP524
C533.047uF
TP518
TP530
R5521K
TP509
R56022Meg
C529.047uF
TP559
R55173.2K
TP551
R50922Meg
TP502
D503MMBD1503A
1
3
2
N502LAMP NEON
TP517
R52610K
C507220pF
TP533
TP521
R50251.1K
C502220pF
TP556
Q5052N7002
3
1
2
+
-
U501AMC34002
3
21
84
R51010K
TP513TP511
R51910K
+
-
U502BMC34002
5
67
84
C541330pF
TP543
R5201.21K
+
-
U508BAD712
5
67
84
C539330pF
R51122Meg
R5481Meg
N503LAMP NEON C515
3.3uFC508220pF
C5441000pF
TP555
TP522
R55722Meg
R55019.6K
TP549
TP550
D501MMBD1503A
1
3
2
R50351.1K
-
+U509LMC7101
4
31
25
TP515
TP503
D504MMBD1503A
1
3
2
C503220pF TP531
TP537
R51210K
TP527
+ C5354.7uF
TP512
Q5022N7002
3
1
2
+ C5344.7uF
C523.047uF
TP519
C519.047uF
R52110K
R54510K
TP510
R51322Meg
TP523
C5381000pF
R52310K
TP536
J501CON6
123456
R553100K
TP504
R51410K
C504220pF
U504
DG202CSE
31
1416
119
68
1345
2
15
10
7
S1IN1
S2IN2
S3IN3
S4IN4
V+V-GND
D1
D2
D3
D4
TP558
R5241.21K
TP508
R51522Meg
TP535
N504LAMP NEON
TP520
R5181.21K
+
-
U503AMC34002
3
21
84
R50451.1K
R5221.21K
D5065.1V
13
TP514
C509220pF
TP547
+
-
U501BMC34002
5
67
84
TP526
C510220pF
+
-
U503BMC34002
5
67
84
D5075.1V
1 3
C511220pF
TP553
C5401000pF
N505LAMP NEON
R565121K
R564464K
C512220pF
TP507
C513220pF
D505BAV99L
1
3
2
R51610K
+
-
U502AMC34002
3
21
84
R50551.1K
R530 10K
C542220pF
C505220pF
R531 10K
C5451000pF
TP532
R55822Meg
R533 10K
R5271K
TP554
R535 10K
TP506
C5140.1uF
+
- U508AAD712
3
21
84
Q5012N7002
3
1
2
TP525
R536 10K
C516.047uF
R52851.1K
TP560
TP552
R537 10K
TP516
R52510K
TP548
C518.047uF
R532 10K
R529 10K
C522.047uF
C521.047uF
R534 10K
TP529
U5054051
131415121524
611109
3
168 7
X0X1X2X3X4X5X6X7
INHABC
X
VD
DV
SS
VE
E
TP561
C524.047uF
R54610K
TP528
U5064051
131415121524
611109
3
168 7
X0X1X2X3X4X5X6X7
INHABC
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VD
DV
SS
VE
E
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
PWM A/DConverter
833uSec
-5V
(U604-10)
IntegratorInput
A/D Mux
+5V
(U602-7)
Serial/ParallelControl Data
PWM-Out
ComparatorInputs
PWM-timer
IsolationBarrier
52uSec
Analog In
TemperatureAmplifier
0.1%
TemperatureThermistor
MuxB
MuxA
U605 U606
620017.dsnRick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
3/15/99JAC5-39121 LPP
L. Phillips
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/16/99
U608 U609
U601
U603
U608 U609U603U602
U602U601
B See ECN worksheet 5-39455 LPP 4/27/99
DImprovements for ESD, RFI,and Fast Transients, CorrectRespiration Diff-Amp Topology
LPP
6/24/995-39821 LPP
Mods to U2 clock line, Respgain amp, ECG supply andNVRAM pullup
E 7/9/99LPP5-39936
LPP
620017 E
ECG A/D and Interface
C
6 8Wednesday, July 14, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
U605-out
U60
3out
Mux-A/D-B
U610-6U
602-
7
iso604-a
U60
2-5
iso601-a
Mux-A/D-C
Mux-A/D-A
U602-3
iso602-a
U60
4-8
Q60
1-e
U604-6
D601-2
U604-10
U608-2
U608-3
SW-RL-V
U601-7
Resp-LdsOff
Sw-RespReset
MuxB
U604-4iso603-a
U612-6
U60
2-2
Temp-In
MuxA
Patient-Temp
MonBw
U601-2
U601-1
U601-3
U608-1
U604-2 U613-6U60
4-1
U60
4-3
U611-6U60
4-5
U605-12
FE-Data-In
f+1.24V
An-ECG
LL
Mux-LdS-B
LA
FE-PWM-ADC
FE-ADC-Clock
Mux-LdS-A
RA
V+
Mux-LdS-CFE-Data-Clock
vRL
iso+5Vdig+5V
+Clamp-Clamp
f+1.24V
An-Resp
Resp-DC
f+1.24V
SpO2-Reset
Sw-MonBw
+5V
+5V
iso+5Vdig
+5V
f+5V
Resp-OfffVee
fVcc
Resp-Reset
SW-RLD-V
SW-RLD-RLSW-RLD-LL
SW-RLD-LASW-RLD-RA
E
f+5V
f+5V
ED
ED
E
fVee
E E
f+5V
fVcc
ED
f+5V
fVcc
E
f+5V
E
E
ED
E
iso+5Vdig
E
E
fVee
fVccfVee
fVcc
fVcc
fVcc
ED ED
E
E
iso+5Vdig
ED
iso+5Vdig
iso+5Vdig
E
iso+5Vdig
f+5V
ED
f+5V
ED
ED
ED
EE E
E E E
E E
E
E
E E
fVee
fVcc
fVee
fVcc
fVee
fVee
fVcc
fVee
fVee
fVcc
fVcc
ED
ED
ED
E
U60674HCT595
14
1110
1213
151234567
9
168
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
VC
CG
ND
TP621
U604F74HCT04
13 12
147
TP603
TP624
TP639
R63010K
C638.047uF
R6251K
U604A74HCT04
12
147
U6094051
131415121524
611109
3
168 7
X0X1X2X3X4X5X6X7
INHABC
XVD
DV
SS
VE
E
C637.047uF
R60410K
C6461000pF
C624.047uF
R60346.4K
TP642
R60110K
TP623
R60273.2K
R6315.11K
R6053.48K
R62346.4K
TP636
R607464K
C632.047uF
C645100pF
J601
CON2
12
R6081K
TP631
U611HCNW4503
2
3
8
6
5
+
- U602LM311
2
37
5 64 1
8
U613HCNW4503
2
3
8
6
5
TP640
Q601MMBT3904L
3
1
2
U612HCNW4503
2
3
8
6
5
TP637
C629.047uF
R6116.19K
TP641
TP604
R610511
TP633
TP616
R6136.19K
U60574HCT595
14
1110
1213
151234567
9
168
SER
SRCLKSRCLR
RCLKG
QAQBQCQDQEQFQGQH
QH
VC
CG
ND
U604C74HCT04
56
147
C640.047uF
C603680pF
R621215
C639.047uF
TP629
TP617
C6420.1uF
U604D74HCT04
9 8
147
R6156.19K
C6410.1uF
TP618
C631.047uF
TP643
TP628
TP627
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U604E74HCT04
11 10
147
U610HCNW4503
2
3
8
6
5
R619619
TP632
R620619
TP635
C633.01uF
C6362200pF
R62451.1K
C625.047uF
TP625
C601
1000pF
+
-
U601AMC34072
3
21
84
C626.047uF
C627.047uF
TP638
TP630
TP610
C634 .01uF
R6325.11K
R6172.15K
TP611
C647100pF
TP601
TP626
+
-
U608AAD712
3
21
84
C6280.1uF
D601MMBD1503A
1
3
2
R6261K
C623.047uF
R62910K
TP615
C635 .01uF
C621
0.1uF
TP609
C644220pF
+
-U607BLM393
5
67
84
+ C6144.7uF
C622.047uF
+
-U607ALM393
3
21
84
+
C6304.7uF
TP612
D602BAV99L
1
3
2
U604B74HCT04
34
147
TP613
+
-
U601BMC34072
5
67
84
TP605
C643220pF
TP614
TP606
R627 1.21K
U6034051
131415121524
611109
3
168 7
X0X1X2X3X4X5X6X7
INHABC
XVD
DV
SS
VE
E
TP620
TP607
R6063.48K
R62810K
+
-
U608BAD712
5
67
84
A
A
B
B
C
C
D
D
E
E
4 4
3 3
2 2
1 1
Serial I/Oconnector
IsolationBarrier
Isolated SupplySerialCommunication
620017.dsnRick Myers
Rick Myers
Mar 5, 1999
Mar 5, 1999
3/15/99JAC5-39121 LPP
L. Phillips
Z. Psenicnik
J. Bello
3/16/99
3/16/99
3/16/99
B See ECN worksheet 5-39455 4/27/99LPP LPP
Improvements for ESD, RFI,and Fast Transients, CorrectRespiration Diff-Amp Topology
D 6/24/995-39821 LPP
Mods to U2 clock line, Respgain amp, ECG supply andNVRAM pullup
E 7/9/99LPP5-39936
LPP
620017 E
Serial Communication
C
8 8Wednesday, July 14, 1999
Title
Size Document Number Rev
Date: Sheet of
Welch Allyn Inc.Schematic:
Release For Production
Approved
Checked
Designed
Drawn
Initial Date
REV Description ECN/ECO Init Date Ckd
A Release to Production
iso802-a
R80
3-2
ISO801-2
ISO801-4
ISO801-1
U80
1-ct
R815-1
U801-1
U802-15
T801-1
T801-4
U801-5
TxU802-3Rx
U802-2
T801-5
q801-e
iso803-a
q802-e
contact2
contact1
iso803-c
T801-2
R81
2-1
q802-b
+5V
RVcc
+5V
RVee
RS423Rx
+5V
R+5V
R+5V
RVee
R+5V RVcc
R+5V
NurseCall
RS423Tx
+Vfuse
R+5V
+5V
R
R
R
R
R
R
RR
R
R
RR
R
R
RR
R
R
C808.047uF
TP806
U801MC34063AD
53
78
1
26
4
COMPTCAP
IPKIDC
ISWC
ISWEVcc
GN
D
D803BAV99L
1
3
2
U805
TPS5908
1
2
3
4
7
6
LED
COMP
GND
FB
C
E
TP808
R8045.11K
C809.047uF
U803HCNW4503
2
3
8
6
5
Q801MMBT3904L
3
1
2
C802220pf
U804HCNW4503
2
3
8
6
5
C806.01uF
C814680pF
TP810
TP807
R813619
R8116.19K
R8076.19K
D801BAV99L
1
3
2
K801RELAY SPST
2
41
3
D802BAV99L
1
3
2
R8053.16K
TP809
R8061K
+ C803100uF
R812215
R8011
C813470pf
R819 215
Q802MMBT3904L
3
1
2
R8025.11K
R810619
+ C805100uF
+ C804100uF
TP802
R817 215
U802TL145406
2
4
6
3
5
7
15
13
11
14
12
10
116
89
1RA
2RA
3RA
1DY
2DY
3DY
1RY
2RY
3RY
1DA
2DA
3DA
Vdd
Vcc
Vss
GN
D
C816.047uF
+C8011uF
J801
RJ-45
12345678
TP804
C812680pF
R80310K
C815.047uF
C810.047uF
TP805
TP801
R808619
T801
IsoXfmr
5
8
1
2
3
4
TP803
R816215
C807470pf
Description Tool # CompanyModified AC Cord T-16761 Welch AllynSafety Analizer 601 Pro Series BioTekHi-Pot Model 3500D Associated ResearchAC Power Source Model EW 371 Elgar
Equipment for perfoming Safety Tests on the Atlas Monitor:
CAUTION : High Voltages are generated andused during the HI-Pot or Dielectric Test. DONOT OPERATE THIS EQUIPMENT AND ORRUN THIS TEST UNLESS YOU HAVE BEENPROPERLY TRAINED AND ARE QUALIFIEDON THIS PROCEDURE!
Test Procedure for Atlas Safety Test Station
Leakage Test Procedure:
1. Verify that all plugs removed from the Elgar AC Power Source and the Biotek 601 Pro Safety Tester2. Turn on EW371 Elgar Supply3. Set Voltage and Frequency (240VAC, 50 Hz) after self-test has completed Key strokes: [Shift] [Range (300v)] [Shift] [2] [4] [0] [Enter] [V/F (frequency)] [5] [0] [Enter] [Out]4. Plug in Biotek 601 Pro to front panel and power up Biotek.5. Toggle [Class/Type] button until Class I, Type CF displayed on Main Menu if necessary.6 Select Test Standard IEC601-1 by pressing the [More] key and then toggling the [Down Arrow]. Then select with [Enter]. Once selected press [ESC]7. Connect ECG leads to Biotek in accordance with color code directly above the top row of sockets: AP/RA (wht),
RL (grn), LA (blk), LL (red), V1 (brn)8. Select Patient Leakage Current Connections: All-Earth[up/down arrows], Norm Pol [polarity], Earth[earth],
L2[L2], Class I Type CF. (no indicator lights are on in outlet control panel [dual rev. pol, no earth, no L2: all off])9. Select Patient Leakage #7 to provide AC power to Biotek AC socket.10. Turn on Atlas Monitor.11. Press Mains on Applied Part #8.11. Record All-Earth:Norm and All-Earth:Rev result (pass/fail) on Atlas Monitor Test Result form. If failure, then place unit on Debug shelf.12. Press Patient Leakage uA #7.13. Record Patient Leakage result (pass/fail) on Atlas Monitor Test Result form. If failure, then place unit on Debug
shelf.14. Turn off Atlas Monitor.15. Remove ECG cable from Atlas.16. Remove AC cord if no printer and proceed to Dielectric Tests.17. If printer, continue to Ground Continuity Test.
Ground Continuity Test (Printer Models Only)
1. Press [Earth Resistance] key (#4)2. Toggle [Test Current] key (#5) until Test Current is 1A if necessary3. Plug red test lead from Front Panel red jack to green jack4. Press [Cal] to calibrate test lead5. After calibration complete, remove red lead from green jack and place red clip on red lead tip6. Attach red lead from 601Pro to printer motor case7. Press [Earth Resistance] (#4)8. Record Earth Resistance result (pass/fail) on Atlas Monitor Test Result form. If failure, then place unit on Debug shelf.9. Press [ESC] key10. Remove red lead from jack and printer motor11. Disconnect AC cord from Atlas and continue to Dielectric Test.
Leakage Test Procedure after First Run of Day
1. Verify Output Voltage and Frequency of EW371 Power Supply (240VAC, 50 Hz)2. Plug power cord from Biotek 601Pro into Atlas Monitor.3. Verify ECG Lead Connection to Biotek 601 Pro.4. Connect ECG plug from Biotek to Atlas Monitor.5. Select Patient Leakage #7 to provide AC power to Biotek AC socket.6. Turn on Atlas Monitor.7. Press Mains on Applied Part #8.
8. Record All-Earth:Norm and All-Earth:Rev result (pass/fail) on Atlas Monitor Test Result form. If failure, then place unit on Debug shelf.9. Press Patient Leakage uA #7.10. Record Patient Leakage result (pass/fail) on Atlas Monitor Test Result form. If failure, then place unit on Debug
shelf.11. Turn off Atlas Monitor.12. Remove ECG cable from Atlas.13. Remove AC cord if no printer and proceed to Dielectric Tests.14. If printer, continue to Ground Continuity Test.
Ground Continuity Test (Printer Models Only)
1. Attach red lead from 601Pro to printer motor case2. Press [Earth Resistance] (#4)3. Record Earth Resistance result (pass/fail) on Atlas Monitor Test Result form. If failure, then place unit on Debug
shelf.4. Press [ESC] key5. Remove red lead from jack and printer motor6. Disconnect AC cord from Atlas
At conclusion of last test of day, turn off Biotek 601Pro and Elgar power supply EW371.
Dielectric Test
Three tests will be performed for Dielectric Withstand.1. Mains to Instrument Common:1500 VAC2. Mains to ECG Output: 4000 VAC3. Mains to Isolated RS232 (Models 210/220 only):
4000 VAC
Mains to Instrument Common: 1500 VAC
A. Connect the modified AC cord (Connection 1: hot and neutral joined, Connection 2: earth ground) to the back of the Atlas Monitor.B. Connect the black clip lead to the return jack of the Hypot 3500 Dielectric tester.C. Connect the red clip lead to the HV jack of the Hypot 3500 Dielectric tester.D. Turn on 3500D. Press [Set]E. Set voltage to 1500 VAC with [up]/[down] buttonsF. Press [Set]G. Set current limit to 3 mA with [up]/[down] buttons
CAUTION : High Voltages are generated andused during the HI-Pot or Dielectric Test. DONOT OPERATE THIS EQUIPMENT AND ORRUN THIS TEST UNLESS YOU HAVE BEENPROPERLY TRAINED AND ARE QUALIFIEDON THIS PROCEDURE!
H. Press [Set]I. Set Timer to 60 seconds with [up]/[down] buttonsJ. Press [Set]K. Set Continuity off.L. Scroll through settings with [Set] button.M. When settings verified, press [Exit] button.N. Connect Red Clip lead to joined Hot and Neutral lines of the test connectorO. Connect Blk Clip lead to grd wire of the modified AC cord.P. Position electrical leads at rear of test benchQ. Press green [Test] button. Wait for 60 seconds.R. Record current: _______mA
Mains to ECG Output: 4KV
A. Plug modified ECG cables into ECG connector at front of Atlas unit.B. Connect the modified AC cord (hot, neutral, and earth ground connected) to the back of the Atlas Monitor.C. Connect the black lead banana plug to the return jack of the Hypot 3500 Dielectric tester.D. Connect the red lead banana plug to the red jack of the Hypot 3500 Dielectric tester.E. Turn on 3500D. Press [Set]F. Set voltage to 1500 VAC with [up]/[down] buttonsG. Press [Set]H. Set current limit to 3 mA with [up]/[down] buttonsI. Press [Set]J. Set Timer to 60 seconds with [up]/[down] buttonsK. Press [Set]L. Set Continuity off.M. Scroll through settings with [Set] button.N. When settings verified, press [Exit] button.O. Connect the red clip lead from HV Jack of Hypot 3500D to modified AC connector cord with all lines connected(Hot, Neutral, and Ground)P. Connect Blk Clip lead to common connection of joined ECG leadsQ. Position electrical leads at rear of test benchR. Press green [Test] button. Wait for 60 seconds.S. Record current: _______mA
Mains to Isolated RS232 (Models 210/220 only): 4000 VAC
A. Plug modified RS232 cable (all wires connected) into the RS232 connector at rear of Atlas unit.B. Connect the modified AC cord (hot, neutral, and earth ground connected) to the back of the Atlas Monitor.C. Connect the black lead banana plug to the return jack of the Hypot 3500 Dielectric tester.D. Connect the red lead banana plug to the HV jack of the Hypot 3500 Dielectric tester.E. Apply power to 3500D. Press [Set]F. Set voltage to 1500 VAC with [up]/[down] buttonsG. Press [Set]H. Set current limit to 3 mA with [up]/[down] buttonsI. Press [Set]J. Set Timer to 60 seconds with [up]/[down] buttonsK. Press [Set]L. Set Continuity off.M. Scroll through settings with [Set] button.N. When settings verified, press [Exit] button.O. Connect the red clip lead from HV Jack of Hypot 3500D to modified AC connector cord with all lines connected(Hot, Neutral, and Ground)P. Connect Blk Clip lead to common connection of joined RS232 leadsQ. Position electrical leads at rear of test benchR. Press green [Test] button. Wait for 60 seconds.S. Record current: _______mA
Atlas Test Results
Patient Leakage test (10uA Maximum)Mains on applied part (50 uA Maxlmum)tarth Resistance (printer only) (.200 Ohms Max)
Dielectric Withstand Test ResultsMains to tarth @ 1.5kV (3mA Max)Mains to tarth @ 4.0kV (3mA Max)Mains to isolation RS232 @ 4 kV (3mA Max)Other
InitializeBatteryPower SupplyBlood Pressure
SpO2KespirationECG 1ECG 2ETCO,
T emperatureOther
Functional Tests ResultsI I I I
Failure Detail I Repairs Made