website:http://biz.LGservice.com E-mail:http://www.LGEservice.com/techsup.html COLOR TV SERVICE MANUAL CHASSIS : FA MODEL : RP-29FA40-M RP-29FA40-O RP-29FA40-P RP-29FA40-R CAUTION BEFORE SERVICING THE CHASSIS, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
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IMPORTANT SAFETY NOTICEThis manual was prepared for use only by properly trained audio-visual servicetechnicians.When servicing this product, under no circumstances should the originaldesign be modified or altered without permission from LG ElectronicsCorporation. All components should be replaced only with types identical tothose in the original circuit and their physical location, wiring and lead dressmust conform to original layout upon completion of repairs.
Special components are also used to prevent x-radiation, shock and fire hazard.These components are indicated by the letter “x” included in their componentdesignators and are required to maintain safe performance. No deviations areallowed without prior approval by LG Electronics Corporation.
Circuit diagrams may occasionally differ from the actual circuit used. This way,implementation of the latest safety and performance improvement changes intothe set is not delayed until the new service literature is printed.
Caution: Do not attempt to modify this product in any way. Never performcustomized installations without manufacturer’s approval. Unauthorizedmodifications will not only void the warranty, but may lead to property damageor user injury.
Service work should be performed only after you are thoroughly familiar withthese safety checks and servicing guidelines.
Graphic symbols
The exclamation point within an equilateral triangle is intendedto alert the service personnel to important safety information inthe service literature.
The lightning flash with arrowhead symbol within an equilateraltriangle is intended to alert the service personnel to the presenceof noninsulated “dangerous voltage” that may be of sufficientmagnitude to constitute a risk of electric shock.
The pictorial representation of a fuse and its rating within anequilateral triangle is intended to convey to the service personnelthe following fuse replacement caution notice:CAUTION: FOR CONTINUED PROTECTION AGAINST RISK OF FIRE,REPLACE ALL FUSES WITH THE SAME TYPE AND RATING AS MARKEDNEAR EACH FUSE.
SERVICE INFORMATIONWhile servicing, use an isolation transformer for protection from AC line shock.
After the original service problem has been corrected, make a check of thefollowing:
FIRE AND SHOCK HAZARD1. Be sure that all components are positioned to avoid a possibility of
adjacent component shorts. This is especially important on items transportedto and from the repair shop.
2. Verify that all protective devices such as insulators, barriers, covers,shields, strain reliefs, power supply cords, and other hardware have beenreinstalled per the original design. Be sure that the safety purpose of thepolarized line plug has not been defeated.
3. Soldering must be inspected to discover possible cold solder joints,solder splashes, or sharp solder points. Be certain to remove all looseforeign particles.
4. Check for physical evidence of damage or deterioration to parts andcomponents, for frayed leads or damaged insulation (including the ACcord), and replace if necessary.
5. No lead or component should touch a receiving tube or a resistor rated at1 watt or more. Lead tension around protruding metal surfaces must beavoided.
6. After re-assembly of the set, always perform an AC leakage test on allexposed metallic parts of the cabinet (the channel selector knobs, antennaterminals, handle and screws) to be sure that set is safe to operate withoutdanger of electrical shock. DO NOT USE A LINE ISOLATION TRANSFORMERDURING THIS TEST. Use an AC voltmeter having 5000 ohms per volt or moresensitivity in the following manner: Connect a 1500 ohm, 10 watt resistor,paralleled by .15 mfd 150V AC type capacitor between a known good earthground (water pipe, conduit, etc.) and the exposed metallic parts, one ata time. Measure the AC voltage across the combination of 1500 ohmresistor and .15mfd capacitor. Reverse the AC plug by using a non-polarized adaptor and repeat AC voltage measurements for each exposedmetallic part. Voltage measured must not exceed 0.75 volts RMS. Thiscorresponds to 0.5 milliamp AC. Any value exceeding this limit constitutesa potential shock hazard and must be corrected immediately.
X-RADIATION1. Be sure procedures and instructions to all service personnel cover the
subject of x-radiation. The only potential source of x-rays in current TVreceivers is the picture tube. However, this tube does not emit x-rays whenthe HV is at the factory-specified level. The proper value is given in theapplicable schematic. Operation at higher voltages may cause a failure ofthe picture tube or high-voltage supply and, under certain circumstancesmay produce radiation in excess of desirable levels.
2. Only factory-specified CRT anode connectors must be used.
3. It is essential that the service personnel have available an accurate andreliable high-voltage meter.
4. When the high-voltage circuitry is operating properly, there is no possibilityof an x-radiation problem. Every time a color chassis is serviced, thebrightness should be run up and down while monitoring the high voltagewith a meter, to be certain that the high voltage does not exceed thespecified value and that it is regulating correctly.
5. When troubleshooting and making test measurements in a product with aproblem of excessively high voltage, avoid being unnecessarily close tothe picture tube and the high voltage power supply. Do not operate theproduct longer than necessary to locate the cause of excessive voltage.
6. Refer to HV, B+, and shutdown adjustment procedures described in theappropriate schematics and diagrams (where used).
IMPLOSION1. All direct view picture tubes are equipped with an integral implosion
protection system; take care to avoid damage during installation.
2. Use only the recommended factory replacement tubes.
TIPS ON PROPER INSTALLATION1. Never install any receiver in a closed-in recess, cubbyhole, or closely
fitting shelf space over, or close to, a heat duct, or in the path of heatedair flow.
2. Avoid conditions of high humidity such as: outdoor patio installationswhere dew is a factor, near steam radiators where steam leakage is a factor,etc.
3. Avoid placement where draperies may obstruct venting. The customershould also avoid the use of decorative scarves or other coverings thatmight obstruct ventilation.
4. Wall- and shelf-mounted installations using a commercial mounting kitmust follow the factory-approved mounting instructions. A product mountedto a shelf or platform must retain its original feet (or the equivalentthickness in spacers) to provide adequate air flow across the bottom. Boltsor screws used for fasteners must not touch any parts or wiring. Performleakage tests on customized installations.
5. Caution customers against mounting a product on a sloping shelf or in atilted position, unless the receiver is properly secured.
6. A product on a roll-about cart should be stable in its mounting to the cart.Caution the customer on the hazards of trying to roll a cart with smallcasters across thresholds or deep pile carpets.
7. Caution customers against using a cart or stand that has not been listedby Underwriters Laboratories, Inc. for use with its specific model oftelevision receiver or generically approved for use with TVs of the same orlarger screen size.
8. Caution customers against using extension cords. Explain that a forest ofextensions, sprouting from a single outlet, can lead to disastrousconsequences to home and family.
PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO-VIDEO PRODUCTS
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X-RADATIONTo prevent possible exposure to x-radiation caused by excessiveCRT Anode Voltage, the FA Chassis incorporates a “High VoltageShutdown” circuit. This circuit senses the level of a flyback pulsefrom the “Flyback Transformer” representative of the actual highvoltage on the CRT anode. When this level exceeds a predeterminedvoltage, the circuit shuts down the horizontal drive, preventingfurther generation of anode voltage. In this condition, the horizontaldrive is ‘‘latched’’ off for about 5 seconds, after which, restart, isattempted.
SHUTDOWN CIRCUIT OPERATIONThe Shutdown pulse voltage from pin 3 of TX3200 (Flyback Trans-former) is peak detected (rectified bythe action of diode DX3001and capacitor CX3001. This form a DC voltage appearing on CX3representative of the CRT anode voltage (HV) produced by TX3200.This voltage is divided down by precision resistors RX3003 andRX3004. This lower voltage appears on Emitter of QX3001. In theevent the CRT anode voltage become excessive, the voltage inEmitter of QX3001 will be higher than voltage in Base of QX3001(Base voltage is fixed by ZDX3002) and therefore QX3001 enters inconduction mode. Therefore a dc voltage will appear on RX3007and this voltage will put QX3002 in saturation. A high voltage level(5.66V aprox.) is sent to pin 32 (X-Ray) of video processor IC2200stopping H oscillation and H output (pin 34) becomes low. If theshutdown condition disappears TV set can be turned-on by usingthe on/off button.
PRODUCT SAFETY SERVICING GUIDELINES FOR AUDIO-VIDEO PRODUCTS
ii
HV SHUTDOWN MEASUREMENT PROCEDURE1. Adjust the beam current to OmA in NTSC mode.2. Apply a variable DC voltage to pin 10 of the PTD1 connector, from 20 to 0 Vdc, starting at 20 Vdc.3. Slowly decrease supply towards zero.4. Remote DC voltage from pin 10 of PTD1.5. After approximately 5 seconds, verify that the HV must be reestablished (High Voltage Reset).
HIGH VOLTAGE SHUTDOWN TEST
Before to turn the TV on, and after discharging the CRT, connect ahigh impedance – high voltage meter to the CRT anode. Apply avoltage signal from an external power supply through the shutdowntest circuit (see Fig. below). Turn the television ‘on’ and confirm agood signal is being displayed. Reduce Brightness and Contrastsettings until the picture is well extinguished. Wait until the VideoMenu or display may disappear. Read HV meter, ramping up theexternal power supply from 0 to 8 volts, the HV increase until theHigh Voltage shutdown, read the high voltage on the HV meter justbefore the voltage start dropping.
1 2
1
2
3
2
1
2
1
2
1
2
1 2
1 21 2
12
1
2
1 2
SHUTDOWN SAFETY CIRCUIT
CRT ANODE HIGH VOLTAGE MEASUREMENT PROCEDUREEach CRT screen has it’s own safe opreating Anode Voltage andshutdown voltage. Critical Safety components (designated andshutdown voltage. Cristal Safety components (desiganted with a n“X” in the components desigantor) are designed to operate the CRTat a safe operating . Anode voltage and provide proper shutdownthresholds. If replacement of any ofv these components are deemednecessary, it is important to use original type Zenith replacementcomponents.After a replacement is made, confirm proper Anode voltage using thefollowing precedure.Measurement of the CRT Anode voltage must be performed whit notvisible raster on the screen and operating at nominal horizontalscanning frecuency 15.734 Khz.After discharging the CRT, connect a high impedance high voltagemeter to the CRT anode. Turn the television ‘on’ and confirm a goodsignal is being displayed. Reduce Brightness and Contrast settingsuntil the picture is well extinguished.Observe the Anode voltage meter reading and compare with thetable for the proper CRT screen size. If the voltage reading is higherthan the maximum, verify circuit component values and properoperation.
CRT Screen SIZE Nominal Anode Voltage Min. Shutdown Voltage Max. Shutdown Voltage(KV) (KV) (KV)
27 Flat 30 – 1.0 Nominal HV + 2 36
CRT Anode Voltage
1-3 FA - REMOTES
MBR3447LG MODEL REMOTE CONTROL
FLASHBK (Flashback)Returns to previous Channel.
POWERTurns TV On or Off.
MODESelects the remote's mode of operation
MUTETurns sound Off and On while picture remains.
VOLUME (Left/Right)Increases TV’s sound level.
ENTER Shows Channel/Time, enters
channel, or removes anyon-screen menus.
UP and DOWN ARROWSMoves highlighted bar withinmenu to select an option.
CCDisplays closed caption menu.
TV/VCR SOURCESteps through source options.
SURFTurns Channel Preview On/Off.
When on, the Channel Up/Downkeys only Scroll through channels
selected in the Add/Del/Blnk.
CHANNEL (Up/Down)Selects next channel in
TV’s memory. Press and hold to repeat.
NUMBER PADSelects channels directly.
MENUDisplays menus for TV
and other options.
LEFT/RIGHT ARROWSChooses and shows the
desired menu option.
A, B, C KeysIn commercial TV’s, doesn’t
have functionallity.
TIMERDisplays the Sleep Timer menu.Press repeatedly to set desired
TV shut-off time.
QUIT/ (Three Functions Key)It doesn’t function in commercial TV.
MBR3447LG124-00233-P09
FA - REMOTES 1-4
PROGRAMMING THE REMOTEIf you’re using Zenith products, the remote is alreadyprogrammed for most common codes: TV= 101, VCR=201, CABLE=353, and AUX=401. For other brands, or ifyour remote fails to control your Zenith products, you’llhave to program the remote.After installing the batteries, follow these steps foreach product:1. Press and hold PRG using a blunt pointed object. Release PRG after the indicator light turns on.2. Press the device button to be programmed (CATV, VCR, AUX, or TV).3. Enter the 3-digit product code from chart on the next page.4. Press and release ENTER to save the code.5. Point the remote at product and press POWER to test the product’s operation. If it does not turn on, reprogram remote using a different code.6. Write the code on the label inside the battery compartment for future reference.
AUTO FINDIf none of the codes in the code table operate yourequipment, use Auto Find to search for the proper code.1. Turn on the product you want to operate.2. Press and hold PRG using a blunt pointed object. Release PRG after the indicator ligth turns on.3. Press any key to be programmed (CAT, VCR, AUX, or TV).4. Enter ”000”, then press ENTER within two seconds. Auto Find is active after the indicator light flashes and remains lit.5. Point the remote at the product.6. Press and release POWER repeatedly, about once a second, until your products turns off. The indicator light turns off when you press POWER and on when you release it.7. Press ENTER immediately to save the code. The indicator light flashes to indicate the code has been saved.8. Press POWER to turn On your product.9. Test your product. If the remote fails to operate some of the basic functions, use Auto Find again to search for a better code. (Auto Find resumes its search after the last code that was entered and saved in step 7).NOTE: If the indicator light stays on as you press POWER,
Auto Find has tried all of the codes. If the productyou want to control has not turned off, yourremote will not work with that product. To cancelAuto Find, press PRG at any time during AutoFind.
CABLE BOXThis remote can control the cable/converter box volumeand muting (instead of the TV’s) is available on yourequipment.1. Program the cable/coverter box normally.2. After programming the cable/converter box. Press and hold PRG again using a blunt pointed object. Release PRG after the indicator light turns on.3. Press and release the device button the cable box is assigned to.4.This time, enter the special code 3-9-9 instead of the product code.5. Press and release ENTER to save.
VOLUME OVERRIDEThese remotes can override TV, VCR, or Video DiskPlayer volume functions with an amplifier’s volume andmuting.1. Program the amplifier normally.2. After programming the amplifier, Press and hold PRG again using a blunt pointed object. Release PRG after the indicator light turns on.3. Press and release the device button whose volume control is to be replaced by the amplifier volume control. For example, pressing TV will operate the amplifier’s volume while the remote is in TV mode.4. This time, enter the special code 4-9-9 instead of the product code.5. Press and release ENTER to save.
AUXILIARY CAPABILITYThis remote can control up to seven devices. If theremote has been programmed for four componentsusing the TV, VCR, CABLE, and AUX keys, you may alsoprogram it for up to three additional using AUX+1,AUX+2 and AUX+3
To Program AUX+1, AUX+2 AND AUX+31. Locate three digit code for product in code table.2. Press and hold PRG until indicator lights up3. Press the AUX and 1 simultaneously to select AUX+1.4. Enter the three-digit code and press ENTER. The indicator light should flash and then turn off to indicate the code has been accepted. If the light stays on, repeat steps 3 and 4 or try a different code.5. Repeat steps 2-4 for AUX+2 and AUX+3.6. Write the codes on the labels inside battery compartment for future reference. Hold down AUX and press 1,2 or 3 to access AUX+1, +2 or +3 mode.
REMOTE PROGRAMMING
1-5 FA - REMOTES
UNIVERSAL ERASER 911To restore the transmitter back to its initial defaultsettings, enter the Programming Mode as usual (byholding PRG until the LED indicator lights), and press 91 1, followed by ENTER. The LED indicator will flashthree times to indicate that the transmitter hasreturned to its initial default brand codes. UniversalErase will work in any mode.
254,703,729 Toshiba 213,274,290, PrimeStar 513 Memorex 485Daytron 246 297 ProScan 510,517 Nad 904DBX 726 Vector Research 726,727 RCA DSS 373 Nakamichi 493Electrohome 730 Victor 726 RCA 510,517 Onkyo 471,906Emerson 203,221,243, Video Concepts 726,727 Realistic 506 Optimus 905
250,293,721, XR - 1000 243 Sierra I 502 Panasonic 912722,729,730, Yamaha 726 Sierra II 502 Pioneer 470,485,907731,732 Zenith 201,224,225, Sierra III 502 Proton 910
Pentax 708,727 Scientific Atlanta 316,323,336, Radio Shack 431,441Philco 275 337,364 RCA 437,943Pioneer 210,282,726 Signal 326 Sanyo 438,439
1-7 FA - MENUS
USER MENUS P221-01524-00
CHANNEL MENUBelow is the Channel Menu for the FA chassis with eachof its options.
EZ PROGRAMThe EZ Program feature automatically searches for all avail-able channels and marks them as ‘Added’ so that theymay be accessed via the channel Up/Down key.
M O V E N E X T E X IT
E Z P rog ramA dd /D e l/Su rfE Z C lo ckC a pt io nsC a pt io n /TextLa ng ua geS ou rce
CH ANNEL
E NTE R
In the EZ Program option, the current RF input type (OffAir Antenna or Cable TV) is highlighted. Use the Up/Down Arrow keys to change the RF input type.
To start the EZ Program, press the Right Arrow key. If theCable TV input type is selected, the EZ Program routinewill determine what type of cable system is present.
Notes:• EZ Program clears all Surfing channels, which were
added.• While searching for channels, all keys except for the
Power key are disabled. This prevents an incompleteEZ Program procedure.
• Running the Auto Program will clear the factory mode,if it was active. This happens at the end of the EZProgram.
• If the EZ Program line in the Setup Menu is ‘red’, thisindicates that the module did not pass by Chassis.When ‘green’, this indicates that the module did notpass by Tracking. When ‘blue’, this indicates that themodule did not pass by Programming. To clear thisline to ‘white’, set the upper nibble of the EEPROMlocation $1FFh to $B0h.
• If no channels are found then the following messagewill appear: “Make sure that the cable/ant. isconnected, and try again.”
ADD/DEL/SURFAfter running the Auto Program, all channels found bythe Auto Program feature will be marked ‘Added’. How-ever, some of these channels may be scrambled, or un-desired by the customer. The Add/Del/Surf feature al-lows the customer to selectively mark any channel as‘Deleted’ or ‘Added’.To change the status of a channel, press the Up/DownArrow keys.To change the channel while adding or deleting chan-nels, use the Channel Up/Down keys, or press the de-sired channel digits, followed by the ENTER key. If onlyone channel is present, to change the channel the cus-tomer must use the digit keypad to select a channel.
EZ CLOCKWhen the EZ Clock item is selected, pressing the RightArrow key allows entry into the clock set menu.
Clock M ode Tim e S et
M anua lA uto
CL O CK
M anual
M O V E M O V E NE X TNE X T B A CKB A CKE N T ERE N T ER
DAYLIGHT SAVINGS TIMEThe customer also has the option of selecting the Day-light Savings Time to be On, Off or Auto using the Left/Right Arrow keys.
CAPTIONSThis feature allows the customer to select: Off, On, or EZwhen Muted options.To change the status of captions, press the Left/RightArrow key to select either On, Off, or EZ Mute.
CAPTION/TEXTThis feature allows the customer to activate ordesactivate Captions or Text.Pressing the Left/Right Arrow keys sequentially througheach of the following Caption/Text options.Caption 1 Caption 2 Caption 3 Caption 4 Text 1 Text 2 Text 3 Text 4
USER MENUS P221-01524-00 (continued)
FA - MENUS 1-8
Notes:• When the Text option is selected and a text box
appears, if the CC key is pressed, the Caption boxthat allows setting to On, EZ Mute or Off will appear,
• When captions are being displayed, if one of theVolume Up/Down keys is pressed, the volume bar willnot appear.
• When the Captions are not activated and the CC keyis pressed, the Caption Box will appear, that allowschoose On, EZ Mute or Off.
LANGUAGEThis feature allows the customer to change the menulanguage to English, Spanish or French by pressing theUp/Down Arrow keys.
SOURCEThis feature allows the customer to select: Antenna, RearVideo, Rear-SV, Front Video, or Comp. Video.
PICTURE MENUAll menu items are adjusted with the Left/Right Arrowkeys.
ContrastB rightnessCo lorT intS ha rpnessCo lor Tem pE Z P icture
PICT URE
M O V E NE X T E X ITE N T ER
CONTRASTContrast adjustment has 101 steps (0 to 100).
BRIGHTNESSThe brightness value sent to the video processor is (RfBrt+ Customer Brightness) if the source is the RF source, or(AuxBrt + Customer Brightness) if the source is the AUXsource. RfBrt and AuxBrt appears in the factory menu.
COLORColor adjustment has 101 steps (0 to 100). The colorvalue sent to the video processor is according to thenext equation and look up table.
TINTTint Adjustment has 101 steps (0 to 100). A centermark indicates step 50. The tint value sent to the videoprocessor is (custom Tint + TintOffset)*127
SHARPNESSSharpness adjustment has 101 steps (0 to 100).The sharp-ness value is sent to the video processor as (CustomSharpness).
COLOR TEMPSets the color temperature. The two settings are COOLand WARM.
EZ PICTUREThis feature allows the customer to maintain 8 separateContrasts, Brightness, Color, Tint, Sharpness by setting“Custom, Normal, Movie, Digital, Video Game, Sports,Night Time, Weak Signal”.
SOUND MENUAll menu items are adjustment with the Left/Right Arrowkeys.
B assTreb leB alanceA ud io m odeFront Su rrE Z S ound riteE Z S ound
SO UN D
M O V E NE X T E X ITE N T ER
BASSBass adjustment has 101 steps (0 to 100).
TREBLETreble adjustment has 15 steps (0 to 14).
BALANCEBalance adjustment has 29 steps (0 to 28).
AUDIO MODEThere are three audio modes available: Mono, Stereo, 2nd
Audio/SAP.If 2nd Audio/SAP is selected, but the current channeldoes not support SAP, then either Stereo or Mono willbe heard.
FRONT SURRFront Surround can be set ‘ON’ or ‘Off’, regardless of thecurrent Audio Mode setting. However, the Front Sur-round effect can only be heard when the Audio Modehas been set to ‘Stereo’ and a Stereo signal is present.When this condition exists, there will be a short mute(200ms) while toggling the Surround ‘On’ to ‘Off’, toembellish Front Surround activation.
1-9 FA - MENUS
USER MENUS P221-01524-00 (continued)EZ SOUNDRITEThe Sound Rite feature is used to obtain a uniform vol-ume level, particularly while changing channels. TheSound Rite feature can be best demonstrated on a chan-nel with no signal (snow).
EZ SOUNDThe EZ Sound Control has six selections the customercan select. The selections available are: Custom, Normal,Stadium, News, Music and Theater. The Left/Right Arrowkeys may be used to select any of the choices mentioned.
LOCK MENUAs show above, with the Lock Menu on-screen, use theUp/Down arrow to highlight an option Like Content Blk,then press ENTER.Use the Up/Down/Left/Right arrows to select and ad-just or set the rating for an option. For Sex Scenes forexample , use the “From TV-PG” setting. (See the MiniGlossary, Ratings Charts on this and the previous pagefor rating definitions).
A ux S ourcesM PA AA ge B lockConten t B lkCdn. Ra tingsS et HoursS et P asswo rdLock O n /O f f
LO C K
M O V E NE X T E X ITE N T ER
AUX SOURCESTo Block or Unblock the sources, press the Up/Down Ar-row keys.The SOURCE key may be used to view the other source.
MPAAThe MPAA selector allows the customer to select eitherto have the channel Unblocked, G and Above, PG andAbove, PG-13 and Above, R and Above, NC-17 and Above,or X.
AGE BLOCKUse the Right Arrow key to select the Age Block Menu.Once entered into the Age Block Menu, the customerhas the option to block channels for general age or toblock channels for children.
GENERAL BLOCKTo block channels for a general age, the customer mayeither select: Unblocked, TV-G and Above, TV-PG andAbove, TV-14 and Above or TV-MA.
G eneral U nb lockedTV -GTV -P GTV -14TV -M A
AG E
Ch ild renG eneral
M O V E NE X T B A CKE N TE R
CHILDREN BLOCKTo block channels for children, select either: Unblocked,TV-Y and Above or TV-Y7.
CONTENT BLOCKTo block a television program according to its content,use the Right Arrow key to select the Content Block Menu.
G eneral U nb lockedTV -P GTV -14
CO N TENT
LanguageVio lenceS ex S cenesF Vio lenceN o R a ting
Dialog
M O V E NE X T B A CKE N TE R
DIALOG BLOCKTo block a television program with Dialog rating, use theUp/Down Arrow keys to select either: Unblocked, TV-PGand Above or TV-14.LANGUAGE BLOCKTo block a television program with Language rating, usethe Up/Down Arrow keys to select either: Unblocked,TV-PG and Above, TV-14 and Above, or TV-MA.VIOLENCE BLOCKTo block a television program with Violence rating, usethe Up/Down Arrow keys to select either: Unblocked,TV-PG and Above, TV-14 and Above, or TV-MA.SEX SCENES BLOCKTo block a television program with Sex Scenes rating,use the Up/Down Arrow keys to select either: Unblocked,TV-PG and Above, TV-14 and Above, or TV-MA.
USER MENUS P221-01524-00 (continued)
FA - MENUS 1-10
F VIOLENCE BLOCKTo block a television program with F Violence rating, usethe Up/Down Arrow keys to select either: Unblocked,TV-Y7.NO RATING BLOCKTo block a television program with No Rating , use theUp/Down Arrow keys to select either: Unblocked andBlocked.
CANADIAN RATINGSUse the Right Arrow key to select the Content Block,and use the Left/Right Arrow keys to select the Cnd.English or Cdn. French.
G eneral E xem ptC h ild ren8+G enera lP G14+18+
CDN. RATING S
C d. FrenchCdn. Eng lish
M O V E NE X T B A CKE N TE R
SET HOURSUse the Up/Down Arrow keys to adjust the number ofhours the Parental Control feature will be active. Thevalid hour range is 1 through 99 hours.
SET PASSWORDPress the Right Arrow key to allow Password entry.
TO ENTER PASSWORDThe software accepts four-digit codes only. The cus-tomer must enter a password
REPEAT PASSWORDAfter a four-digit code has been entered, the softwarerequires the customer to re-enter the same four-digitcode.
PASSWORD NOT ACCEPTED!If an invalid code is entered, or the two codes entereddo not match, a blinking error message (“Not Accepted!”)will appear. This error message also appears when no codeis entered for the password or if only one digit is en-tered and no other digit has been entered.
LOCK ON/OFFThis item turns the Parental feature On or Off. The Pa-rental Ctrl. feature can only be turned on if the hours >0, and a password has been set. Otherwise the Lock On/Off line will display either of the following error mes-sages: “Must Set Hours” or “Must Set Password.”
RE-ENTERING PARENTAL CONTROL MENUIf the Parental Control feature has been activated,the software will not allow immediately entry intothe Parental Control Menu. Instead, it will promptfor the correct password. If the correct pass-word is entered, the Parental Control menu willbe unlocked so the user can change the con-figuration for parental options. If an incorrectpassword is entered, an error message (“Not Ac-cepted!) appears, and will not disappear until 5seconds. This extended time provision increasesthe amount of time necessary for a child to “crack”the password.Notes:• The Parental Control menu will remain up for
15 seconds after the last key press.• The QUIT key may be pressed to remove the PC
menu.• Entry into the Factory Menu will immediately
turn off the PC feature• The PC Hours and Password will be cleared
upon exit of the Parental Ctrl menu (unlessthe Parental Ctrl feature has been turned on.)
DISPLAY WHEN PARENTAL CONTROL IS ACTIVEWhen the Parental Control has been activatedthe channel is blocked. The display on the screenshows two lines. The first line displays a mes-sage saying that the “PARENTAL LOCKOUT IS AC-TIVE.”The second line displays the amount of time (inhours) left in the lockout.
1-11 FA - MENUS
USER MENUS P221-01524-00 (continued)SPECIAL MENUThis Menu contains the EZ Timer , Ch. Labels, XDS Dis-play, EZ Demo and EZ Help.
E Z Tim e r
CH . Labels
X DS D isplay
E Z D em o
E Z H elp
SPEC IAL
M O V E NE X T E X ITE N TE R
EZ TIMERThe Timer Menu contains the Sleep Timer and the On/OffTimer features.SLEEP TIMERSleep Timer (via Timer Menu)The Left/Right Arrows can be used to adjust the currentsleep timer setting:Off, 0:10, 0:20, 0:30, 1:00, 1:30, 2:00, 3:00 or 4:00
E Z Tim e rCH . LabelsX DS D isplayE Z D em o
E Z H elp
P RE S S
TO S E T
SPEC IAL
MOVE NEXT BACK
EZ Tim er
ON/OFF TIMERThis feature consists of three menu lines: “On Time”,“Off Time”, and “On/Off Timer”. This feature allows theset to turn on and off at the times specified in “OnTime” and “Off Time”.The “On Time” and “Off Time” are set identical to theClock Set feature in the Channel Menu.An Off Time must be specified, before turning on the “EZTimer”—otherwise an error message (“Must Set On/Off”)will be displayed on the On/Off Timer line.The On/ Off Timer option turns the Timer On or Off.If there is no Off Time set, then the On/Off Timer dis-plays the above message saying: “Must Set Off Timer.”Once the Off timer has been set, the customer can thenset the option to either On or Off.
CHANNEL LABELS OPTIONThis feature allows the customer to select a channel la-bel for the current station. This channel label is dis-played in the Channel/Time display. Initially, all channellabels are set to ‘——‘, which results in no channel be-ing displayed in the Channel/Time display.
A&E CMTV ESPN HSE NOS TBN VCABC CNCB ESP2 HSN PBS TELE VCRACTS CNN ET IC PLAY TLC VH-1ADC COM EWTN INSP PTL TMC VISNAMC CSPN FAM JCN QVC TNN VJNBCC CSP2 FNN LIFE RDS TNT WBBET CTN FOX MAX REQ TRAV WGNBRAV CTV F&V ME/U SC TSN WTBSCA DIS FX MMT SCFI TVA WWORCBC DISC GALA MTV SHOW TWC YTVCBN E! HBO NBC SIN UPN ----CBS ENC HN NICK TBS USA None
CHANNEL LABELS
To change the current channel label, press the Up/DownArrow key.To change the channel while adjusting channel labels,use the Channel Up/Down keys, or press the desired chan-nel digits, followed by ‘Enter’. (If Channel Up/Down ispressed, the next or previous channel which was marked‘Added’ will appear.)
Note:• When in the channel label is selected ————, then
the Auto channel label is activated, in other words,the program automatically take the channel labelof the signal that is send by broadcasting throughthe XDS service.
• If the label None is selected, the Auto channel labelis disactivated.
XDS DISPLAYPressing the Left/Right Arrow Keys allows the customerto select the XDS Display either On or Off.
USER MENUS P221-01524-00 (continued)
FA - MENUS 1-12
EZ DEMOThe EZ Demo is designed to show-off the icon menusand other icon displays on the sales floor. The EZ Demofeature can be turned On/Off with the Up/Down Arrowkeys.Initially, when the feature is activated, as soon as theOSD times out, the EZ Demo will start. At this point,pressing any key will temporarily disable the EZ Demo for18 seconds, and if the EZ Demo is working and the Menukey is pressed then the Special Menu will be displayedand the EZ Demo feature will be selected allowing thecustomer to disable it.
Note:• The Auto Demo On/Off setting is not stored to the
EEPROM.
EZ HELPThe special features EZ Help option may be accessed us-ing the Right Arrow key. The EZ Help feature provideshelp on certain options and also provides support forthe EZ Programm, Add/Surf/Del, Degaussing, EZ Pictureand EZ SoundRite features. There is a simple explanationof each options.
The EZ Help has a main screen called EZ Help. This screengives a solution to the most common problems that acustomer may encounter; i.e., To program channels.
MISC DISPLAYSSLEEP TIMERTo press the timer key for activate the sleep timer.The user can choose to activate the timer to turn off theTelevision in 10, 20 or 30 minutes or 1, 1:30, 2,3 or 4hours just by clicking on the sleep timer clock.
VOLUME DISPLAYWhen the Volume key is pressed, the following displayappears on the screen.
23
CLOSED CAPTIONSIf the CC key is pressed the following displays appears.The customer may change the settings of the Closed Cap-tions to Off, On or EZMute
CHANNEL/TIME/AUDIO DISPLAYPressing the ENTER Key allows the customer to displaythe channel, time audio mode as well as information ofthe current program along with the rating of the pro-gram.
O FF
FACTORY MENU
2-1 FA - INSTALLERS MENU
SECTION 2INSTALLERS MENU
INSTALLERS MENUAccess the Installer’s Menu by using the remote controlor the keyboard on the front of the set.
With the remote: Press & Hold MENU key until theChannel/Time display appears, then press 9, 8, 7, 6, andENTER.
With 6 button keyboard: Press and hold MENU until theChannel/Time display appears. Simultaneously press theVOLUME UP and CHANNEL DOWN keys.
Notes:• When the factory mode is set to “1”, then
press ‘9’, ‘8’, ‘7’, and ‘6’, followed by‘ENTER’ to access the Installer’s Menu.
• To acces the G2 re-adjustment mode, press 2 holdthe Menu key until the Channel/Time display appears,then press ‘9’, ‘8’, ‘7’, ‘6’, and quit key.
00 Fact Menu: Use the Select key to select item #00,which is the first item in the Installer’s Menu. TheFactory Mode item should always be left off (Zero isoff). When left in this mode, only items from 0 to 27are visible. When the factory mode is set to 1, all menu(Audio or Video settings) items will be available. Alsothey will appear on the screen one at a time at the topleft of the screen.
When The Factory Mode is on, the Factory Menu lineappears at the middle of the screen to allow for propersetting of the video.
When the Factory Mode is turned off, all TV functionsare returned to normal. The simbols at the top of thechannel menu icons is removed indicating that theFactory Mode is off. There are 4 ways to turn off theFactory Mode:
1. Change Installer’s Menu Item “00 F Mode” to 0.2. Run Auto Program.3. Use the Clock Set feature to set the time.4. Use Factory off IR code.
Notes:
• Video Preference Settings Inhibited: In the VideoMenu, the Custom Video Preference settings areinhibited while the Factory Mode is on and willNOT be stored in EEPROM. (This allows the factoryto temporarily change the settings and not storethem permanently.)
01 Preset Px: Used to store the customer menu adjust-ments in the nonvolatile memory of the EAROM. Set-tings for Contrast, Brightness, Color and Tint arestored in this manner. 0 is Custom and 1 is Preset.
02 Preset Ax: Saves your custom audio settings
(Bass,treble,balance,audio mode,sound rite,frontsurr,speaker) in nonvolatile memory (not affected bypower loss). Memory status is indicated by a 1 for“custom settings already stored”, or 0 for “custom set-tings have not been stored.”
03 Vert Pos: Sets On Scree Display vertical position. Usethe ADJUST keys.
04 Horz Pos: Sets On Screen Display horizontal position.Use the ADJUST keys.
05 Band/Afc: There are 8 possible settings for this op-tion.
06 Ac on: Allows the TV to turn ON just by applying ACpower. Pressing the ON button is not necessary. Thisis desirable when the TV is plugged into a cable boxor a power outlet controlled by a wall switch. Use ad-just to select 0 or 1, where 0 is OFF and 1 is ON.
Note: When set to 1 (ON), the TV does not respond toON/OFF commands from either the remote or thecontrol panel, and the SLEEP TIMER is alsononfunctional.
07 Feature Level: Set to 1 to see Zenith Code, when setto 0 Private Codes are shown.
08 Trap: Turn On 3.58 MHz internal trap in Video Proces-sor.
09 RF Band Pass Activates the Band Pass Filter for RF(Antenna) input
10 RF BRT Set Black Level for RF input (Antenna)
11 Aux BRT Set Black Level for Auxiliar input (Video:Composite & Y/C)
12Yuv BRT Set Black Level for YUV input (ComponentVideo)
13Max Bright Set maximum internal Brightness Register
14Max Contrast Set maximum internal Contrast Register
41 EW Trap-Corr: East-West Trapezium Correction.Range0-63. Initial value 30. Range 0-31, Initial value: 23
42 V Centering: Vertical Centering. Range 0-63. Initialvalue: 30
43 V Linearity: Vertical Linearity. Range 0-15. Initialvalue: 12
44 V S-Corr: Vertical S-Correction. Range 0-15. Initialvalue: 11
45 H EHT Comp: Horizontal Extremely High TensionCompesation. Range 0-7. Initial value: 4
46 V EHT Comp: Vertical Extremely High TensionCompesation. Range 0-7. Initial value: 6
47DC Rest Set the DC Restoration level
48BLK Stretch Set the Black Stretch start point
49ABL Gain Set the Automatic Black Level Gain
50SVM GAIN Adjust the Scan Velocity Modulator gain
51SVM PH Adjust the Scan Velocity Modulator Phase
52ACB SW Activates Automatic Control Beam
53SHARP PF Sharpness peak frequency selection: 0 to3.2 MHz and 1 to 4.0 MHz
54CORING Activates the enhancement of Sharpness from1 to 2 MHz
55B-Y ATT Set the attenuation level of Cb of YUV signal
56R-Y ATT Set the attenuation level of Cr of YUV signal
57AUTO FLESH Activates the Flesh tone control
58 ABL START POINT Set the Automatic Black Level StartPoint
59Y GAMMA Set the non-linear Gamma curve for Lumi-nance signal
60ACB PULSE P Set Automatic Control Beam Start Point
61SCREEN Not used
62AKB SETUP Mute the RGB Cathodes
63AUX BAND PASS Activates the Band Pass Filter forAuxiliar (Composite, Y/C, YUV) input
64CD MATRIX Set the relative phase and amplitude ofColor response to demodulate de Chroma
65YCbCr Select the Demodulation System for ComponentVideo YUV or YCbCr
66C GAMMA Switch the Color Gamma
3-1 FA - SERVICING
SERVICINGLARGE SIGNALPOWER SUPPLY
The FA is a COLD chassis of a single sided circuit board,developed for a 27”. The power supply section featuresfour IC’s for voltages sources. The FA chassis has thecapability to meet the Energy Star requirement for alow power consumption on stand-by mode.
The FA chassis employs a switching power supply, quasi-resonant topology type. The AC line is supplied thruthe bridge rectifier BRX3400 and CX3410 circuit throughthe fuse FX3400 (5A @ 250 V fast blow), The AC opera-tion range is between 90 Vrms to 135 Vrms (see TABLE1.1) and a filter, consisting of LX3400, LX3401, CX3401,CX3403 and CX3408, which is employed before the rec-tifier circuit to reduce noise from the AC line and viceversa (EMI).The voltage output of the rectifier, VDC, is supplied tothe Switch Mode Regulator Power Supply, and its out-put should be in this range [127 VDC to 352.5 VDC].The SMPS consisting of ICX3612, ICX3701, ICX3702 andthe chopper transformer TX3600. Through 100 KOHMresistor (Rst), RX3601 and CX3604 (Cst), which is de-rived the VCC from CX3410. These feed the pin 3 intothe internal zener diode located within ICX3612.
POWER SUPPLY BLOCK SCHEMATIC
SERVICING (continued)
FA - SERVICING 3-2
At the same time this voltage is also applied to an inter-nal comparator. So the voltage of this power source mustbe within a set range, between a 5VDC reference (Vref)and a 32VDC zener diode (Vz).This set range is verified through the UVLO (Under Volt-age Lock Out) circuit of the Switch Power IC.
START UPWhen the VCC reaches a upper threshold voltage (15VDC) the comparator switches to enable the ICX3612including all internal bias circuits, control circuits, PWMmodulator & Power MOSFET.Due the demand of energy from Cst and Rst the VCC volt-age starts to fall. Before to fall too low, a bootstrapwinding on the power transformer (pins 13 & 16) reforcesadequately the VCC power to keep the full system opera-tion.
VOLTAGE SOURCESThere are Five secondary windings on the TX3600 andeach has its own half wave rectifier.Consequently there are Five stand-by DC voltages: B+,24VAUD, 21VL, 16VSB & 12VUP.
The first is used to source the horizontal sweep circuit,HOT (Horizontal Output Transistor). The second is usedfor audio. The third is exclusively for the LSP source,which is always on stand-by. The four is used for videolow signal processing and The fifth is used formicrocontroller.
The main microprocessor IC6000 and the EAROM memoryIC6001 are supplied by a five volts stand-by source,+5V SB, which is derived through ICX3820 (0IKE78500P).
The +16 VSB and +12 VUP volts stand-by are protectedby fuses FX3613 and FX3614 ( 4A @ 125V) Very FastActing, the +21VL and +24 VAUD volts stand-by are pro-tected by fuses FX3611 and FX3612 ( 4A @ 125V) SlowBlow. B+ as mentioned before are protected by the OCPcircuit. So they do not need fuse.
The FA chassis can be turn it on with the keyboard onthe front of the set or with the remote hand control.The microcontroller IC6000 receive a signal and it out-put a high, about 4.8V, on pin 32 which is called PWR-CTL. This pin is connected to RX3832, RX3831 andRX3540; producing the +VAUD, +9VSW, +5VSW.
DEGAUSSING
The FA chassis employs a new method of degaussing,which is performed through software. The IC6000 gen-erate a pulse of about 1 second, time fixed, on pin 43.This pin is set to high, about 4.8 VDC, through R3900,4.7K 5% ¼watt. And it applies to Q3900, which drivesthe 12 VCD relay KX3900. So the degaussing is performedwhen the degauss coil is plugged to CN3T8 connector.
POWER SUPPLY ALIGNMENT PROCEDURES
ELECTRICAL ADJUSTMENT
The FA chassis SMPS does not need any manual measure-ment. All the output voltages are regulated throughICX3702 (221-265-03A), error amplifier. The ICX3702keeps the regulation using a reference voltage, througha voltage divider. The voltage divider is formed by twoprecision RX3706 and RX3704.The values of these resistors depends of the B+ outputvoltage.
NOTES:·When servicing make sure to use a 120 VAC- 60Hz 25
Amp isolated source.·Use a full white field on the video pattern generator.
PIN DESCRIPTIONPIN # DESCRIPTION FUNCTION1 POWER MOSFET DRAIN To drive the chopper xfmr,capable of switching a max of 650V.2 GROUND (HOT) MOSFET Source connection.3 DRIVE (+VCC) Positive supply voltage, 32VDC4 FEEDBACK (Vfb The output voltage error is applied to this pin.5 SYNCHRONY (Vs/s External sync signal & Soft star capacitor.
This circuitry provides a east/west pincushion correc-tion by providing a smaller horizontal deflection currentat the upper and lower portions of the flat screen, thruthe dual OP-AMP IC3300 . In addition, the overall hori-zontal width is adjusted using this circuit.
SHUTDOWN CIRCUITThis shuthdown circuit operates by means of a sample ofHV taken from pin 3 of the sweep transformer TX3200.This sample of voltage is rectified, filtered and then com-pared with a reference voltage (fixed by ZDX3002) bythe transistor QX3001. When the HV reaches the maxi-mum permitted voltage, the transistor QX3001 enters inconduction mode; like consequence the transistor QX3002also enters in conduction too, switching a DC voltageon pin 32 of IC2200.When IC2200 receives this DC voltage, the X-ray protec-tion is activated and the TV set is shutting off.
VERTICALThe FA chassis uses a 221-01410 on ICX2100, whichcontains; On-chip Thermal Protection, Pump-Up Stageand Power Amplifier. The vertical drives comes from pins13 & 14 from the video processor IC2200, which are anegative and positive vertical Ramps. The Output tothe yoke is on PIN 2 of ICX2100 . Dual power supply isneeded for this IC (+/- 14Vdc), Applied on pins 6 & 1respectively.
SMALL SIGNAL
AUDIO & VIDEO PROCESSING
The FA chassis has a stereo amplifier, IC800 P221-1488,which is the final audio stage. This chassis does nothave phone output, however it has Matrix Output. TheMatrix output is used to connect a center speaker, inserial with the two stereo speakers. This feature is usedto connect an additional 8 Ohm 10W speaker.The stereo amplifier provides an power output of 10W x2. The IC1400, 221-01127 is the audio processor andprovides the Bass, Treble, Balance, front surround andsoundrite features, this IC is controlled thru the IIC bus.
AUDIOAMPLIF
Output
IC6000
IC800TDA7263
Hard
L
R OUTPUT
REARJACK -
Output R
L
R INPUT
IC1400CXA2054S
19
RV1
LV
FRONTJACK-
I C 2
A/VSWITC
IC2900CXA2089S
RV3
LV
Comp. Audio In
7
6
AUX1-
AUX1-
R
L39
40
47
45
SVin R L
V R L
SVout
SVin
22
24
8
10
1
5
10
83
AUX2-R
AUX2-41
42
Matrix-
RV2
LV15
17
RV4
LV
I C 2
28
30Pb R LPr
V R LY
17
VIDEO PROCESSINGThe IC2200, P221-01519 or TB1253AN/N is a TV SignalProcessor IC, which contains PIF,SIF, Video, Chromaand deflection signal processors for NTSC systems. Also,it has V and EW geometric correction Outputs.
FeaturesIF Stage.
Inter-carrier input.Digital AFT
Tank coil less PIF VCOAdjustment FreeVideo Stage
Built-in AV SwitchVideo monitor Output for CCD MCUBuilt in chroma trapBlack stretcher, DL Aperture ControlScan Velocity Modulation output.
SERVICING (continued)
FA - SERVICING 3-4
During the introduction of FA chassis the TA1253AN version was introduced, which is an upgrade from the Nversion, the following is a comparison of both processors:
The IC2200 receives the video signal from the A/V switchIC2990, P221-01438, which is switching the video sig-nals from the Front and Rear jacks. Also involved is thedigital comb filter IC2400, 221-01449. The YUV inputis processing directly through the IC2200. The ABL cir-cuit employed has been adjusted to allow to the IC2200a maximum permissible Cathode current of 1.8 mA.
Data
TB1253ANSpecifications
ITEM TB1253N
PIF block - < Improve> - -
Y white --> black ringing
PIF horizontal noiseAFT defeat (" IF lock" detection)920 KHz beat
H VCO temperature driftV-S correction
Color GainAuto flesh control range
H output re-start frequency
V skew performance
Read Bus "V lock", "VP"
V wide BLK1 specification
V centering variable range"H lock" detection
10 degree
OK Below Y 100%
CHROMA block
38dB
+100KHzY block
OK Below Y 130%
TINT control center shift
C-TRAP fo shiftY linearity
-
"Vlock"
+/-20%EVEN: 9/8.5H, ODD 8.5/8H
(upper/lower) +/-25%
45dB
below +20KHz
below 3degree
"Lock-in" by Hsync 16 counts
14.7 KHzAsyncronous1.9 Hz/mV
-
0.62 Vp-p1
0.86 Vp-p2 dB UP(narrow)
TEXT block
(wide)
CR input D range
15.7KHzStop when low lwvwl
2.5 Hz/mV
DEF block
H output stop timingH AFC sensitivity
< Improve >20%/-12%
EVEN: 9/9.5H, ODD 8.5/9H(upper/lower)
+/-22%"Lock-out" by no Hsync 56 counts
-
"VP"
3-5 FA - SERVICING
SERVICING
Y /C loo pC trl
CR
T
Yoke
C rC b R i L i
R ii
Y /C i
L i
Y /C o
Mo
R i L i
V f L f R fY /C f
Y M
ain
Sw
SUMMARY OF AUDIO/VIDEO SIGNALS
REAR JACK PACK:YUV + LR Input (Component Video) … directly troughVideo ProcY/C + LR Input (Rear SVideo)CV + LR Input (R Video)Y/C loop + Matrix Output
FRONT JACK PACK:Y/C or CV + LR Input (Front SVideo/Video)
CXA2089S SONY IC48 pins DIP package with 9 DC VccIt drives 3 Y/C+LR and 3 CV+LR input, plus Y/C output3 CV cross trough Comb filter and come back like Y/C
SERVICING (continued)
FA - SERVICING 3-6
DIGITAL COMB FILTER
The IC2400 is the digital comb filter for NTSC-U formatit is a 1H, 2L Digital comb filter.It separates luminance (Y) and chrominance (C) signalsfrom NTSC system composite video signal by using 2horizontal (H) lines and delaying 1horizontal line onmemory.This logical comb filter reduce color dot interferenceand realizes high performance Y/C separation.
COMB FILTER CRITICAL SIGNALOn the Pin 10 (Fsc) color sub carrier signal tuned to3.58 Mhz for chrominance and luminance separation.If this signal is not present the next problems couldbe happened:
a) Color flickerb) Chroma beatc) Luminance signal noise
1
2
1
VIDEO OUTPUT
The RGB signals are applied to the IC5100, which is thevideo RGB output.IC5100 is triple Amplifier with fix gain equal to 51, op-erating at 9 Mhz of Bandwidth with small signal. It usesone +Vcc equal or less of 200 DC Volts. AKB option isnot used for this model.Using LR array the output is connected to its respectiveCathode
SCAN VELOCITY MODULATOR
This signal comes from directly from Video ProcessorIC2200.Three stages for signal are:
1: Class A NPN Amplifier2: Complementary symmetry Driver3: Complementary symmetry output Amp Impedance coupling network connects to SVM coil in CRT assembly.
YUV SWITCH PROVISIONFA chassis also has a provision to support an additionalYUV input thru IC2902, 74HC4053AP,but this is only aprovision. This IC is a 6x3 DEMUX controlled by controlsignal sent by IC6000, MICOM. The outputs point torear jack’s YUV (Normally Closed inputs).
3-7 FA - SERVICING
SERVICINGADJUSTMENT PROCEDURESCOPE:After change CPT or chassis make next arrangements.1. – Initial Upload.
Menu Register name ValueCustomer Customer Contrast 0Customer Customer Brightness 50Factory RF Brightness 41Factory Aux Brightness 41Factory YUV Brightness 41Factory Max Contrast 110Factory Max Brightness 36Factory Sub Contrast 6Customer Color Temp CoolFactory Red Cutoff 0Factory Green Cutoff 0Factory Blue Cutoff 0Factory Green Gain 63Factory Blue Gain 60Customer Color Temp WarmFactory Red Cutoff 0Factory Green Cutoff 0Factory Blue Cutoff 0Factory Green Gain 63Factory Blue Gain 51
G2 (SCREEN) ADJUSTMENT
a) Set Chromatics as Normalb) Set Customer Contrast at 0c) Set Customer Brightness at 15d) Set any channel without RF signale) Push <MENU> key at remote control until it display channel labelf) Push <9,8,7,6,QUIT> to display Horizontal Line (it will remain by 3 minutes)g) Turn G2 control at Sweep (FBT) in clock wise to make noticeable the line and after turn counter clock wise to make it lightly visible.h) Push <QUIT> to exiti) Set again Normal Chromatic and available channel
WHITE BALANCE ADJUSTMENTa) Set any video source without signal (channel label will remain)b) Set Chromatics as Normalc) Set Customer Brightness at 85d) Observe what color is most noticeable: Red, Green or Bluee) Push <9,8,7,6,MENU> to enter at Factory menu; change the value “FACT MENU” (register #0) from 0 to 1 to get at all registers.f) Charge into the Factory registers from 24 to 28 the respective values looking into the tables of Cool & Warm.
a) Set LG 10 Step pattern.0 1 2 3 4 5 6 7 8 9 <= Grey Scale
<= Color Bars
b) Change values of Factory registers #10 and #11 (RF & AUX BRT respectively) to 31 and register #12 YUV BRT to 21. Retouch register #10 to have 3rd step half illuminated. Set RF and AUX equal and YUV lower 10 units.c) Push <9,8,7,6,MENU> to enter at Factory menu; change the value “FACT MENU” (register # 0) from 1 to 0 to disable the Factory Menu.d) Set again Normal Chromatic and available video source
TINT ADJUSTMENTa) Customer Tint register is fixed for all EZ pictures, therefore Tint adjustment is not required.
SERVICING (continued)
FA - SERVICING 3-8
EZ PICTURE VALUES FOR VIDEO PROCESSORa) If it necessary to review the values of Chromatics for each EZ Picture, next tables have entire description.
b) Check the Video Processor IC type: TB1253N uses Tint Offset register at 5; and TB1253AN uses Tint Offset register at 0.
Tint offset will be " 5 "RF, CV & Y/C SourcesControls Normal Movie Digital Video Game Sport Night Time Weak SignalContrast 100 70 100 67 80 27 67Brightness 50 57 60 57 35 70 54Color 65 60 65 55 57 62 59Tint 0 0 0 2R 4G 0 0Sharpness 85 85 100 77 80 80 40Color Temp Cool Warm Cool Cool Cool Warm Cool
YUV SourceControls Normal Movie Digital Video Game Sport Night Time Weak SignalContrast 100 70 100 67 80 27 67Brightness 50 57 60 57 35 70 54Color 65 60 65 55 60 59 64Tint 0 0 0 2R 4G 0 0Sharpness 85 85 100 77 80 80 40Color Temp Cool Warm Cool Cool Cool Warm Cool
Tint offset will be " 0 "RF, CV & Y/C SourcesControls Normal Movie Digital Video Game Sport Night Time Weak SignalContrast 100 70 100 67 80 27 67Brightness 50 57 60 57 35 70 54Color 50 50 53 45 46 50 51Tint 0 0 0 2R 4G 0 0Sharpness 85 85 100 77 80 80 40Color Temp Cool Warm Cool Cool Cool Warm Cool
YUV SourceControls Normal Movie Digital Video Game Sport Night Time Weak SignalContrast 100 70 100 67 80 27 67Brightness 50 57 60 57 35 70 54Color 47 47 50 42 46 44 49Tint 0 0 0 2R 4G 0 0Sharpness 85 85 100 77 80 80 40Color Temp Cool Warm Cool Cool Cool Warm Cool
Video Processor IC: TB1253N
EZ picture values for Video Processor IC: TB1253AN
3-9 FA - SERVICING
SERVICINGIF AND AUDIO SERVICING
AGC DELAYWith a strong noise-free antenna signal, adjust with leftselect key the RF AGC (#20) to a lower setting until thesignal gets noiser. Increase the setting again (with rightselect key) for a noise-free picture.
AUDIO LEVEL ADJUSTMENTa) Apply a RF signal with good video and audio at 100Hz at 100% modulation.b) Access item #19 AUDIO LEVEL on the service menu.c) Place a high impedance meter on pin #19 of IC1400 or the positive side of capacitor C1427. Adjust with left/right select keys the AUDIO LEVEL register to 250 mVrms.
MTS DECODER ALIGNMENT.The purpose of this procedure is adjusting registers ofSONY audio decoder and sound processor CXA2054S(IC1400).
Initial conditions:a) Alignment should be accomplished at least ten min- utes after the TV set have been turned on.b) TV sound must be set for flat response (EZ sound in Normal).c) Audio mode must be set for Stereo.d) Use 8 ohm resistive loads instead of the speakers.e) Open RM1416 and RM1417 in order to disconnect the RF audio signal.f) Connect a Multiplex Modulator to negative of capaci tor C1427.
Five register of the audio processor should be adjusted.Bits TEST-DA and TEST1 should be set according withthe current adjust.Inside of the service menu:
·To see TEST-DA and TEST1 registers enter the “B” key of the remote control (TESTDA= “0” and TEST1 = “0” are conditions for normal operation), then ten bits regis ters will display in the bottom of the screen, upper of tree rows (see the figure 1). The first one is TESTDA register and the second one is TEST1 register.·To change the state of TESTDA and TEST1 push the “QUIT” key of the remote control.
ATT ADJUSTMENT
a) Set the chassis for RF input.b) Set bits TEST-DA = “0” and TEST1 = “0”.c) Input a 100 Hz signal at 25 KHz deviation (100 % mod.), 75 us off to pin 19 of IC1400.d) Adjust with right/left select keys the A ATT register (item #30) for 490 mVrms (± 10 mVrms) in TVOUT-L output, pin 44 of IC1400.
STEREO, SAP VCO ADJUSTMENT
a) Set bits TEST-DA = “1” and TEST1 = “0”.b) Monitor the TVOUT-R output frequency (pin 43 of IC1400) in a no input state.c) Adjust with right/left select keys the A VCO register (item #31) of IC1400 so that frequency is as close to 62.936 KHz (± 0.5 KHz) as possible.
STEREO, SAP DBX FILTER ADJUSTMENT
a) Set bits TEST-DA = “0” and TEST1 = “1”.b) Input 9.4 KHz, 600mVrms to COMP-IN pin 19 of IC1400.c) While monitoring the STATUS FLAG (FILADJ bit, see figure 2) of IC1400, adjust with right/left select keys the A FILTER register (item #32). Align with the cen ter of the FILADJ = 1 (Adjustment OK) condition range (see figure 2).
FILAD JFLAG
Figure 2 A FILTER adjustm ent.
0
01
ADJUSTM ENT POINT
FILTER RE GIS TE R
63
SEPARATION ADJUSTMENT
a) Set bits TEST-DA = “0” and TEST1 = “0”.b) Set volume at maximum.c) Set a stereo signal, 300 Hz at 12.9 KHz deviation (30 % mod.), left channel only, dbx ON at pin 19 of IC1400.d) Adjust with right/left select keys the WBAND register (item#34) to reduce right speaker output at the mini mum.e) Set the frequency only of SIF signal to 3 KHz.f) Adjust with right/left select keys the SPECTRAL regis ter (item #35) to reduce right speaker output at the minimum.
D2101 103-00347-03A DIODE ;LOW VOLTAGE GENERAL ;SILICOND2200 103-00461A DIODE ;ULTRA FAST SWITCHING ;HIGH CONDUCTANCED2201 103-00347-03A DIODE ;LOW VOLTAGE GENERAL ;SILICOND3200 103-00461A DIODE ;ULTRA FAST SWITCHING ;HIGH CONDUCTANCED3900 103-00461A DIODE ;ULTRA FAST SWITCHING ;HIGH CONDUCTANCE
DIODE
CONNECTOR
FERRITE CORE
COMPONENT PARTS LIST
4-8 FA - COMPONENT PARTS LIST
LOCATION PART NUMBER DESCRIPTIOND5106 103-00344-06A DIODE ;LOW VOLTAGE GENERAL ;D5107 103-00461A DIODE ;ULTRA FAST SWITCHING ;HIGH CONDUCTANCED5500 103-00461A DIODE ;ULTRA FAST SWITCHING ;HIGH CONDUCTANCED5501 103-00344-06A DIODE ;LOW VOLTAGE GENERAL ;D5502 103-00344-06A DIODE ;LOW VOLTAGE GENERAL ;D6001 103-00461A DIODE ;ULTRA FAST SWITCHING ;HIGH CONDUCTANCED6002 103-00461A DIODE ;ULTRA FAST SWITCHING ;HIGH CONDUCTANCED6003 103-00461A DIODE ;ULTRA FAST SWITCHING ;HIGH CONDUCTANCEDX3000 103-00461A DIODE ;ULTRA FAST SWITCHING ;HIGH CONDUCTANCEDX3001 103-00344-06A DIODE ;LOW VOLTAGE GENERAL ;DX3201 103-00344-06A DIODE ;LOW VOLTAGE GENERAL ;DX3203 103-00344-06A DIODE ;LOW VOLTAGE GENERAL ;DX3204 103-00344-06A DIODE ;LOW VOLTAGE GENERAL ;DX3205 103-00344-06A DIODE ;LOW VOLTAGE GENERAL ;DX3206 103-00344-06A DIODE ;LOW VOLTAGE GENERAL ;DX3210 103-00461A DIODE ;ULTRA FAST SWITCHING ;HIGH CONDUCTANCEDX3300 103-00344-06A DIODE ;LOW VOLTAGE GENERAL ;DX3301 0DD410000AC DIODE,RECTIFIER;RU4DS,LF-L1 SANKEN;DX3302 103-00347-03A DIODE ;LOW VOLTAGE GENERAL ;SILICONDX3600 103-00369-09A DIODE ;LOW VOLTAGE GENERAL ;SILICONDX3601 103-00344-06A DIODE ;LOW VOLTAGE GENERAL ;DX3602 103-00344-06A DIODE ;LOW VOLTAGE GENERAL ;DX3603 103-00461A DIODE ;ULTRA FAST SWITCHING ;HIGH CONDUCTANCEDX3610 PF-54685 DIODE AND HEATSINK; ASSEMBLYDX3611 PF-54685 DIODE AND HEATSINK; ASSEMBLYDX3613 103-00560-07 DIODE ;FAST RECOVERY RECTIFIER ;600 PIVDX3614 103-00339-04A DIODE ;LOW VOLTAGE GENERAL ;SILICONZD1201 103-00279-15A DIODE ;ZENER ;7.5V 0.5WZD1202 103-00279-21A DIODE ;ZENER ;12V 0.5WZD1231 103-00279-36A DIODE ;ZENER ;33V 0.5WZD2100 103-00336-10A DIODE ;ZENER ;5.1V 0.5WZD2200 103-00279-15A DIODE ;ZENER ;7.5V 0.5WZD2201 103-00279-21A DIODE ;ZENER ;12V 0.5WZD2202 103-00279-21A DIODE ;ZENER ;12V 0.5WZD2204 103-00279-21A DIODE ;ZENER ;12V 0.5WZD2205 103-00279-15A DIODE ;ZENER ;7.5V 0.5WZD2900 103-00279-18A DIODE ;ZENER ;9.1V 0.5WZD2901 103-00279-18A DIODE ;ZENER ;9.1V 0.5WZD2902 103-00279-18A DIODE ;ZENER ;9.1V 0.5WZD2903 103-00279-18A DIODE ;ZENER ;9.1V 0.5WZD2904 103-00279-18A DIODE ;ZENER ;9.1V 0.5WZD2905 103-00279-18A DIODE ;ZENER ;9.1V 0.5WZD2907 103-00279-18A DIODE ;ZENER ;9.1V 0.5WZD2908 103-00279-18A DIODE ;ZENER ;9.1V 0.5WZD2909 103-00279-18A DIODE ;ZENER ;9.1V 0.5WZD2911 103-00279-18A DIODE ;ZENER ;9.1V 0.5WZD6002 103-00279-18A DIODE ;ZENER ;9.1V 0.5WZDX3002 103-00472A DIODE ;ZENER ;12V 0.5WZDX3600 103-00279-15A DIODE ;ZENER ;7.5V 0.5WZDX3602 103-00279-11A DIODE ;ZENER ;5.6V 0.5 WZDX3603 103-00279-06A DIODE ;ZENER ;3.6V 0.5WZDX3801 103-00279-36A DIODE ;ZENER ;33V 0.5W
BRX3400 PF-54718 IC AND HEATSINK ;ASSEMBLY ;IC1400 0ISO205400A IC,SONY;CXA2054S 48P,SDIP BK US;IC2200 P221-01519 INTEGRATED CKT ;NTSC IF + VCD PROCESSOR
IC
FUSE & JACK
COMPONENT PARTS LIST
FA - COMPONENT PARTS LIST 4-9
LOCATION PART NUMBER DESCRIPTIONIC2400 221-01449 INTEGRATED CKT ;DIGITAL COMB FILTER ;IC2900 221-01438 INTEGRATED CKT ;AUDIO VIDEO SWITCH ;IC3300 221-00494 INTEGRATED CKT ;DUAL DIFF INPUT W/SINGLE-ENDED SUPP;LINEAR, OP-AMPIC5100 PF-54716 IC AND HEATSINK ;ASSEMBLY ;IC6000 P221-01524 INTEGRATED CKT ;8-BIT MICROCOMPUTER ;IC6001 221-00745-05 INTEGRATED CKT ;8K BIT SERIAL EEPROM ;IC6002 221-01177A INTEGRATED CKT ;SYSTEM RESET ;ICX2100 PF-54657 IC AND HEATSINK ;ASSEMBLY ;ICX3601 0ILI817000G IC,LITEON;LTV817M-VB 4P,DIP BK PHOTO COUICX3612 PF-54656 IC AND HEATSINK;ASSEMBLY ;ICX3701 0ILI817000G IC,LITEON;LTV817M-VB 4P,DIP BK PHOTO COUICX3702 221-00265-03A INTEGRATED CKT ;ADJUSTABLE SHUNT REGULATOR ;ICX3820 0IKE780500P IC,KEC;KIA78L05BP(AT) 3P 5V,150MA;ICX3821 PF-54709 IC AND HEATSINK ;ASSEMBLY ;ICX3822 PF-54655 IC AND HEATSINK;ASSEMBLY ;