In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used. COLOR TELEVISION Chassis No. GA-4M MODEL Page ELECTRICAL SPECIFICATIONS .................................................................................................. 1 IMPORTANT SERVICE SAFETY PRECAUTION ......................................................................... 2 LOCATION OF USER'S CONTROL .............................................................................................. 4 INSTALLATION AND SERVICE INSTRUCTIONS ........................................................................ 5 SERVICE MODE ........................................................................................................................... 6 ADJUSTMENT METHOD .............................................................................................................. CHASSIS LAYOUT ....................................................................................................................... 25 BLOCK DIAGRAM ........................................................................................................................ 26 SCHEMATIC DIAGRAMS ........................................................................................................... PRINTED WIRING BOARD ASSEMBLIES ................................................................................... 33 REPLACEMENT PARTS LIST ...................................................................................................... 36 PACKING OF THE SET ................................................................................................................ 42 CONTENTS POWER INPUT ..................... 110-230 V AC,50/60 Hz POWER RATING .............................................. 82 W PICTURE SIZE ...................... 1,240 cm 2 (192sq inch) CONVERGENCE ......................................... Magnetic SWEEP DEFLECTION ............................... Magnetic FOCUS ............................ Hi-Bi-Potential Electrostatic INTERMEDIATE FREQUENCIES Picture IF Carrier Frequency ................... 45.75 MHz Sound IF Carrier Frequency .................... 41.25 MHz Color Sub-Carrier Frequency .................. 42.17 MHz (Nominal) AUDIO POWER OUTPUT RATING ...................... 3 W SPEAKER SIZE ........................................................ 9 cm x 5 cm VOICE COIL IMPEDANCE ............... 16 ohm at 400 Hz ANTENNA INPUT IMPEDANCE VHF/UHF .................................. 75 ohm Unbalanced TUNING RANGES VHF-Channels .......................................... 2 thru 13 UHF-Channels ........................................ 14 thru 69 CATV Channels ...................................... 1 thru 125 ELECTRICAL SPECIFICATIONS TVSM045-21V-R70M Specifications are subject to change without prior notice. SERVICE MANUAL SHARP (PHILS.) CORPORATION Km. 23 West Service Road, South Super Highway Alabang, City of Muntinlupa 12 30 21V-R70M 21V-R70M
42
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In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to itsoriginal condition and only parts identical to those specified should be used.
COLOR TELEVISIONChassis No. GA-4M
MODEL
PageELECTRICAL SPECIFICATIONS .................................................................................................. 1IMPORTANT SERVICE SAFETY PRECAUTION ......................................................................... 2LOCATION OF USER'S CONTROL .............................................................................................. 4INSTALLATION AND SERVICE INSTRUCTIONS ........................................................................ 5SERVICE MODE ........................................................................................................................... 6ADJUSTMENT METHOD ..............................................................................................................CHASSIS LAYOUT ....................................................................................................................... 25BLOCK DIAGRAM ........................................................................................................................ 26SCHEMATIC DIAGRAMS ...........................................................................................................PRINTED WIRING BOARD ASSEMBLIES ................................................................................... 33REPLACEMENT PARTS LIST ...................................................................................................... 36PACKING OF THE SET ................................................................................................................ 42
CONTENTS
POWER INPUT ..................... 110-230 V AC,50/60 HzPOWER RATING .............................................. 82 WPICTURE SIZE ...................... 1,240 cm 2 (192sq inch)CONVERGENCE ......................................... MagneticSWEEP DEFLECTION ............................... MagneticFOCUS ............................ Hi-Bi-Potential ElectrostaticINTERMEDIATE FREQUENCIES
Picture IF Carrier Frequency ................... 45.75 MHzSound IF Carrier Frequency .................... 41.25 MHzColor Sub-Carrier Frequency .................. 42.17 MHz
(Nominal)
AUDIO POWER OUTPUT RATING ...................... 3 W SPEAKER
SIZE ........................................................ 9 cm x 5 cmVOICE COIL IMPEDANCE ............... 16 ohm at 400 HzANTENNA INPUT IMPEDANCE
Specifications are subject to change without prior notice.
SERVICE MANUAL
SHARP (PHILS.) CORPORATIONKm. 23 West Service Road, South Super Highway Alabang, City of Muntinlupa
12
30
21V-R70M
21V-R70M
2
IMPORTANT SERVICE SAFETY PRECAUTIONService work should be performed only by qualified service technicians who arethoroughly familiar will all safety checks and the servicing guidelines which follow:
X-RADIATION AND HIGH VOLTAGE LIMITS1. Be sure all service personnel are aware of the
procedures and instructions covering X-radiation.The only potential source of X-ray in current solidstate TV receivers is the picture tube. However, thepicture tube does not emit measurable X-Rayradiation, if the high voltage is as specified in the"High Voltage Check" instructions.It is only when high voltage is excessive that X-radiation is capable of penetrating the shell of thepicture tube including the lead in the glass material.The important precaution is to keep the high voltagebelow the maximum level specified.
2. It is essential that servicemen have available at alltimes an accurate high voltage meter.The calibration of this meter should be checkedperiodically.
3. High voltage should always be kept at the rated value- no higher. Operation at higher voltages may causea failure of the picture tube or high voltage circuitryand;also, under certain conditions, may produceradiation in exceeding of desirable levels.
4. When the high voltage regulator is operating properlythere is no possibility of an X-radiation problem.Every time a color chassis is serviced, the brightnessshould be tested while monitoring the high voltagewith a meter to be certain that the high voltage doesnot exceed the specified value and that it is regulatingcorrectly.
5. Do not use a picture tube other than that specifiedor make unrecommended circuit modifications to thehigh voltage circuitry.
6. When t roub le shoo t ing and tak ing tes tmeasurements on a receiver with excessive highvoltage, avoid being unnecessarily close to thereceiver.Do not operate the receiver longer than is necessaryto locate the cause of excessive voltage.
WARNING1. For continued safety, no modification of any circuit
should be attempted.2. Disconnect AC power before servicing.3. Semiconductor heat sinks are potential shock
hazards when the chassis is operating.4. The chassis in this receiver has two ground systems
which are separated by insulating material. The non-isolated (hot) ground system is for the B+ voltageregulator circuit and the horizontal output circuit. Theisolated ground system is for the low B+ DC voltagesand the secondary circuit of the high voltagetransformer.To prevent electrical shock use an isolationtransformer between the line cord and powerreceptacle, when servicing this chassis.
SERVICING OF HIGH VOLTAGE SYSTEMAND PICTURE TUBEWhen servicing the high voltage system,remove the static charge by connecting a10k ohm resistor in series with an insulatedwire (suc h as a test pr obe) between the pic-ture tube gr ound and the anode lead. (ACline cord should be connected from ACoutlet.)1. Picture tube in this receiver employs integral
implosion protection.2. Replace with tube of the same type number for
continued safety.3. Do not lift picture tube by the neck.4. Handle the picture tube only when wearing
shatterproof goggles and after discharging the highvoltage anode completely.
21V-R70M
3
SAFETY NOTICEMany electrical and mechanical parts in televisionreceivers have special safety-related characteristics.These characteristics are often not evident from visualinspection, nor can protection afforded by them benecessarily increased by using replacement componentsrated for higher voltage, wattage, etc.Replacement parts which have these special safetycharacteristics are identified in this manual; electricalcomponents having such features are identified by " "and shaded areas in the Replacement Parts Lists andSchematic Diagrams.
IMPORTANT SERVICE SAFETY PRECAUTION(Continued)
1. Inspect all lead dress to make certain that leads arenot pinched or that hardware is not lodged betweenthe chassis and other metal parts in the receiver.
2. Inspect all protective devices such as non-metalliccontrol knobs, insulating materials, cabinet backs,adjustment and compartment covers or shields,isolation resistor-capacity networks, mechanicalinsulators, etc.
3. To be sure that no shock hazard exists, check forleakage current in the following manner.Plug the AC cord directly into a 110~230 volt ACoutlet, (Do not use an isolation transformer for thistest).Using two clip leads, connect a 1.5k ohm, 10 wattresistor paralleled by a 0.15uF capacitor in serieswith all exposed metal cabinet parts and a knownearth ground, such as electrical conduit or electricalground connected to earth ground.Use an AC voltmeter having with 5000 ohm per volt,or higher, sensitivity to measure the AC voltage dropacross the resistor.
BEFORE RETURNING THE RECEIVER(Fire & Shock Hazard)Before returning the receiver to the user, performthe f ollowing safety checks.
Connect the resistor connection to all exposed metalparts having a return to the chassis (antenna, metalcabinet, screw heads, knobs and control shafts,escutcheon, etc.) and measure the AC voltage dropacross the resistor.AII checks must be repeated with the AC line cordplug connection reversed. (If necessary, a non-polarized adapter plug must be used only for thepurpose of completing these check.)Any current measured must not exceed 0.5 milliamp.Any measurements not within the limits outlinedabove indicate of a potential shock hazard andcorrective action must be taken before returning theinstrument to the customer.
For continued protection, replacement parts must beidentical to those used in the original circuit. The use ofsubstitute replacement parts which do not have the samesafety characteristics as the factory recommendedreplacement parts shown in this service manual, maycreate shock, fire, X-radiation or other hazards.
1.5k ohm10W
0.15 FTEST PROBE
TO EXPOSEDMETAL PARTS CONNECT TO
KNOWN EARTHGROUND
!
21V-R70M
CHANNEL Up / Down(Power On)
VOLUME Up / DownMenu/Preset
POWERStandby MAIN
REMOTE CONTROL
4
LOCATION OF USER'S CONTROL
Front Panel
Basic Remote Control Functions
Note: Appearance design may vary depending on models ;E
REMOTE CONTROL
FLASHBACK
Infrared Transmitter
Window
MENU
CHANNEL UP / DOWN
POWER INPUT
1 2 3
4 5 6
7 8 9
0 100
CH
MENU
MUTE
FLASHBACK
DISPLAY
CH+VOL-VOL
TV
INPUTPress Switch to external videoINPUT 1 mode.Press 2 times Switch to externalvideo INPUT 2 mode.Press 3 times Switch back to theoriginal TV mode.
( ) Selects next higher channel.( ) Selects next lower channel presetting.
Press Accesses MAIN MENU.Press again Exits MAIN MENU.
DISPLAYPress Displays receivingchannel for four seconds.Press again Removes display. Temporarily displays receiving channel when in Closed Caption mode.
(+ ) Increases sound.(- ) Decreases sound. In menu mode, changes or selects the TV adjustments.
VOLUME UP / DOWN
Returns to previous channel.
POWERPress ON.Press again OFF.
REMOTE KEYPADAccesses any channel from keypad.
MUTEPress Mute sound.Press again Restores sound. CLOSED CAPTION appears whensound is muted.
21V-R70M
5
CIRCUIT PROTECTIONThe receiver is protected by a 3.15A fuse (F701),mounted on PWB-A, wired into one side of the A Cline input.
X-RADIATION PROTECTOR CIRCUIT TESTAfter ser vice has been perf ormed on the horizontaldeflection system, high v olta ge system, B+ system,test the X-Radiation pr otection cir cuit to ascer tainproper operation as f ollo ws:
1. Apply 110~230V AC using a variac transformer foraccurate input voltage.
2. Allow for warm up and adjust all customer controlsfor normal picture and sound.
3. Receive a good local channel.4. Connect a digital voltmeter to TP653 and make sure
that the voltmeter reads 26 ±1.1V.5. Apply external 27V DC at TP653 by using an
external DC supply, TV must be shut off.6. To reset the protector, unplug the AC cord and make
a short circuit between TP651 and TP652. Now makesure that normal picture appears on the screen.
7. If the operation of the horizontal oscillator does notstop in step 5, the circuit must be repaired before theset is returned to the customer.
HIGH VOLTAGE CHECKHigh v oltage is not adjustab le but m ust be c heckedto verify that the receiver is operating within safeand efficient design limitations as specified checksshould be as follows:
1. Connect an accurate high voltage meter betweenground and anode of picture tube.
2. Operate receiver for at least 15 minutes at 110~230VAC line voltage, with a strong air signal or a properlytuned in test signal.
3. Enter the service mode and set Y-mute ON by usingService R/C.
4. The voltage should be approximately 28.5 kV (at zerobeam).If a correct reading cannot be obtained, check circuitryfor malfunctioning components. After the voltage test,make Y-mute off to the normal mode.
INSTALLATION AND SERVICE INSTRUCTIONSNote: (1) When performing any adjustments to resistor controls and transformers, use non-mettalic
screw drivers or TV alignment tools.(2) Before performing adjustments, the TV set must be on at least 15 minutes.
21V-R70M
6
Service Mode Overview1. Service mode is entered by SERVICE key input or CH-UP +VOL-DOWN input during reset.2. Service mode is cleared by entering SERVICE key command during service mode.3. If key input port (SERVICE) input is LOW, then it is in service mode.4. During key input port (SERVICE) input is LOW, clearing service mode by key input SERVICE is disabled.5. Service mode can be switched to 4 modes as follows by key input MENU;
SERVICE MODE
6. AFT processing is disabled during service mode. PLL setting data is set to fo data.7. All user data are set to default during service mode. FAO and SPEAKER user settings are off and on respectively
in service mode. Energy Save is off.8. Sleep timer, View timer, on timer and off timer are inactivated in Service mode.9. Sound is muting in service mode except at Adjustment Items V20, M01, M03, M04, M05, and M06.
Adjustment mode
Setting modeFirst mode of service mode when SERVICE key is pressed.
First mode of service mode when local key CH-UP + VOL-DOWN is pressed after MCU reset.
SELF ADJUSTMENTH-VCO1. When there is H-VCO self-adjustment key input for adjustment item H-VCO, self-adjustment is performed.2. H-FREE(1chip) is set to 1.3. H-OUT is set by intelligent monitor output.4. IM input is set as TIM input.5. H-VCO(1chip) data is changed so that the number of input pulse is 125 inside 8ms interval.6. When adjustment completed, OSD display and H-VCO self-adjustment status data of EEPROM are updated.7. H-FREE(1chip), intelligent monitor output and IM input mode are recovered.
RF-AGC1. When there is RF-AGC self-adjustment key input for adjustment item RF-AGC, self-adjustment is performed.2. AGC-OUT is set by intelligent monitor output.3. IM input is set as AD input.4. By decreasing RF-AGC (1chip) data from current RF-AGC adjustment value to 0, AFT input voltage becomes the
maximum setting value.5. Increase RF-AGC(1chip) data, when AFT input voltage is at (max. 0.3V) point, adjustment is completed.6. When adjustment completed, OSD display and RF-AGC self-adjustment status data of EEPROM are updated.7. Intelligent monitor output and IM input mode are recovered.
PIF-VCO1. When there is PIF-VCO self-adjustment key input for adjustment item PIF-VCO, self-adjustment is performed.2. VIF-DEF(1chip) is set to 1.3. AFC is set by intelligent monitor output.4. IM input is set as AD input.5. VIF-VCO(1chip) data is changed so that input voltage becomes 2.5V.6. When adjustment completed, OSD display and PIF-VCO self-adjustment status data of EEPROM are updated.7. VIF-DEF(1chip), intelligent monitor output and IM input mode are recovered.
No OPTION FUNCTION 0 1 Default Data001 DEMO Without DEMO With DEMO 1002 DOWNLOAD Without V-CHIP OP With V-CHIP OP 0003 V-CHIP Without V-CHIP With V-CHIP 0004 SPEAKER Without SPEAKER With SPEAKER 1005 FAO Without FAO With FAO 1006 P.PREF Without P.REF With P.REF 1007 UNIV+ Without UNIV+ With UNIV+ 1008 VIEW TIMER Without VIEW TIMER With VIEW TIMER 1009 EZ-SETUP EZ-SETUP AUTO PRESET 0010 PON-CH Without POWER-ON With POWER-ON 0011 FAV-COL FAV-COL COL-TEMP 1012 COMPONENT Without COMPONENT With COMPONENT 1013 AV Without AV With AV 1014 AV2 AV1 system AV2 system 1015 MTS Without MTS With MTS 1016 TONE-CTRL Without S-ADJ With S-ADJ 1017 AUTO-OFF Without AUTO-OFF With AUTO-OFF 1018 INIT-LANG ENGLISH SPANISH 1019 SETUP-FLAG NO SET UP AUTO SET UP 1020 AV-FR "0"=NO AV "1"=REAR "2"=FRONT "3"=REAR & FRONT 3021 AV3/S-IN Without AV3/S-IN With AV3/S-IN 0022 COMB Without COMB With COMB 0023 AUTO-INPUT Without AUTO-INPUT With AUTO-INPUT 1024 CLOCK Without CLOCK With CLOCK 1025 LED SEMEX MODEL SPC MODEL 0026 FLAT Not FLAT MODEL FLAT MODEL 1027 BASS BOOST Without BASS BOOST With BASS BOOST 0028 DSE Without DSE With DSE 0029 SRS Without SRS With SRS 0030 WHITE-OUT Without WHITE-OUT With WHITE-OUT 1
Check ModeMicron mask version, software version and ROM correction function status are displayed in check mode.
21V-R70M
12
ADJUSTMENT METHODCaution: to get into the service mode, one of the ways is press direct key for service items.
There is three stage of Service Mode dataFirst stage data from V01 ~ M06to go into second stage of service mode data, press MENU keySecond stage data from F01 ~ F70to go into third stage of service mode data, press MENU keyThird stage data from 001 ~ 030
1. ADJUST THE V07 BUS DATA TO HAVE A BALANCE POSITION TO SPECOF A=B.
2. IF CANNOT MAKE IT TO A=B, ADJ FROM THE BEST POINT SO THATB SLIDELY SMALLER THAN A
[CHECKING SPEC] LEFT AND RIGHT SYMMETRICAL
SYMBOL REVISED CONTENT,
A B
ADJUSTMENTITEMADJUSTMENTPOSITION
CONTROL
PRE-ADJUSTREQUIREMENT
CONTENT
INPUTCONDITION
OUTPUT
ADJUSTMENTPROCEDURE
HISTORYOF REVISION
ADJUST THE V09 BUS DATA UNTILL THE OVERSCAN BECOME ASSPECIFIED BELOW.CAUTION: - PLEASE AGING TV MORE THAN 10 MINUTES BEFOREADJUSTMENT.
V-SIZE
V09 STEP RANGE 0~63
I2C CONTROL
OPTION SET UP, BUS SET UP, CRT PURITY, V-PHASE, +B ADJUST
US 6 CH LION HEAD
AC 230V
CONFIRMATION BY CRT SCREEN
[CHECKING SPEC] OVERSCAN 10 ± 2.5%
SYMBOL REVISED CONTENT,
21V-R
70M
17-1 17-2
ADJUSTMENTITEMADJUSTMENTPOSITION
CONTROL
PRE-ADJUSTREQUIREMENT
CONTENT
INPUTCONDITION
OUTPUT
ADJUSTMENTPROCEDURE
HISTORYOF REVISION
V-PHASE
V06 STEP RANGE 0-7
I2C CONTROL
OPTION SET UP, BUS SET UP, CRT-PURITY
US 6 CH LION HEAD (MONOSCOPE PATTERN)
230V, RF INPUT, ZERO MAGNETIC FIELD
CONFIRMATION ON CRT SCREEN
ADJUST V06 BUS DATA TO HAVE MOST ACCEPTABLE VERTICAL PO-SITION.THE MONOSCOPE PATTERN SHOULD BE BALANCE IN VERTICALPOSITIONNOTE: THE DATA FOR V06 LIMIT AT <= 04, EVEN POSITION GOODENOUGH
[CHECKING CONFIRMATION]
SYMBOL REVISED CONTENT,
ADJUSTMENTITEMADJUSTMENTPOSITION
CONTROL
PRE-ADJUSTREQUIREMENT
CONTENT
INPUTCONDITION
OUTPUT
ADJUSTMENTPROCEDURE
HISTORYOF REVISION
1) BY SELECTING THE V18, BOX BLK TEXT WILL BE APPEARED.2) ADJUST THE V18 BUS DATA TO HAVE A BALANCE POSITION TO
SPEC OF A=B.
CLOSED CAPTION SET UP
V18 STEP RANGE 0~255
I2C CONTROL
OPTION SET UP, BUS SET UP
US 6 CH LION HEAD
AC 230V
CONFIRMATION ON CRT DISPLAY.
[CHECKING SPEC] LEFT AND RIGHT SYMMETRICAL
SYMBOL REVISED CONTENT,
A B
TEXT BOX BLK
21V-R
70M
18-1 18-2
H-VCO
V21 STEP RANGE 0-7
I2C CONTROL
OPTION SET UP, BUS SET UP
NO SIGNAL (RASTER) CONDITION
AC 230V
IC 801 PIN 11
(MANUAL ADJ)1) GO TO SERVICE MODE,2) GO TO SERVICE DATA V21, ADJ UNTIL FREQ AS BELOW
(SELF ADJ)1) GO TO SERVICE MODE,BY SELECTING THE SERVICE DATA V212) PRESS THE R/C TO OPERATE AUTO H-VCO,OSD APPEAR "OK" AT
SCREEN3) IF APPEAR "NG" PLS REPEAT STEP2
[CHECKING SPEC] FREQ = 15.735 ± 0.2 KHz
SYMBOL REVISED CONTENT,
ADJUSTMENTITEMADJUSTMENTPOSITION
CONTROL
PRE-ADJUSTREQUIREMENT
CONTENT
INPUTCONDITION
OUTPUT
ADJUSTMENTPROCEDURE
HISTORYOF REVISION
ADJUSTMENTITEMADJUSTMENTPOSITION
CONTROL
PRE-ADJUSTREQUIREMENT
CONTENT
INPUTCONDITION
OUTPUT
ADJUSTMENTPROCEDURE
HISTORYOF REVISION
(AT SELF ADJUSTMENT MODE)1) GO INTO SERVICE MODE, BY SELECTING THE SERVICE DATA V102) PRESS THE R/C FOR AUTO PIF-VCO KEY, OSD APPEAR "OK" AT
SCREEN3) IF APPEAR "NG" PLS REPEAT STEP 2
(AT MANUAL ADJUSTMENT MODE)1) GO INTO SERVICE MODE, BY SELECTING THE SERVICE DATA V102) ADJUST THE DATA UP/DOWN UNTIL IC801 PIN 2 VOLTAGE BECOME
AS SPECIFIED BELOW
PIF-VCO
V10 STEP RANGE 0~63
I2C CONTROL
OPTION SET UP, BUS SET UP
NO SIGNAL (RASTER) CONDITION
AC 230V
CONFIRMATION ON CRT DISPLAY (AUTO), IC801 PIN 2 VOLTAGE (MANUAL).
[CHECKING SPEC] 2.5 ± 0.5 V DC (CHECKING SPEC : 2.50 ± 1.5V)
SYMBOL REVISED CONTENT,
21V-R
70M
19-1 19-2
ADJUSTMENTITEMADJUSTMENTPOSITION
CONTROL
PRE-ADJUSTREQUIREMENT
CONTENT
INPUTCONDITION
OUTPUT
ADJUSTMENTPROCEDURE
HISTORYOF REVISION
RF-AGC
V08 STEP RANGE 0-127
I2C CONTROL
OPTION SET UP, BUS SET UP
US10CH HALF COLOR BAR
RF INPUTFIELD STRENGTH 53dB uV (FIX)
TUNER AGC TERMINAL (TP 201) OR CRT DISPLAY CONFIRMATION
(AT SELF ADJUSTMENT MODE)1. GO TO SERVICE MODE2. GO TO SERVICE DATA V08, PRESS R/C TO OPERATE AUTO-AGC
KEY AND CONFIRM THE OK DISPLAY ON THE SCREEN.3. IF APPEAR NG PLS REPEAT STEP 2 AGAIN.
(AT MANUAL ADJUSTMENT MODE)1. ADJUST THE V08 BUS DATA UNTIL AGC TERMINAL VOLTAGE BE-
COME MAXIMUM, THEN DROP 0.1V BELOW MAXIMUM VOLTAGE.2. CHANGE THE ANTENNA INPUT SIGNAL TO 63-67 dBmV, AND MAKE
SURE THERE IS NO NOISE3. CHANGE THE ANTENNA INPUT SIGNAL TO 90-95 dBmV TO BE SURE
THAT THERE IS NO CROSS MODULATION BEAT.
[VOLTAGE CONFIRMATION] MAX - 0.1V dc
SYMBOL REVISED CONTENT,
ADJUSTMENTITEMADJUSTMENTPOSITION
CONTROL
PRE-ADJUSTREQUIREMENT
CONTENT
INPUTCONDITION
OUTPUT
ADJUSTMENTPROCEDURE
HISTORYOF REVISION
1) IN SERVICE MODE, SET V04&V11&V12&V13 TO 127; V14&V15 TO64, GET IN Y-MUTE BY R/C AND SET V19 TO "1", PICTURE APPEARIN CUT-OFF CONDITION
2) ADJUST THE SCREEN SO THAT CUT-OFF LINE APPEAR IN LOWBRIGHT, THEN JUDGE THAT WHETHER THE CUT-OFF LINE APPEARIN RED OR GREEN OR BLUE COLOR, IN THIS CONDITION V11=R-CUTOFF, V12=G-CUTOFF, V13=B-CUT-OFF, FIX THE DATA OF THECOLOR APPEAR IN CUTOFF LINE AND USE R/C TO ADJUST THEOTHER TWO CUT-OFF DATA SO THAT CUT-OFF LINE COLOR BE-COME WHITE.
3) TURN THE SCREEN VR OF FBT SO THAT CUT-OFF LINE JUST DIS-APPEAR AND USE R/C TO SET V19 TO "0", NEXT DIASBLE THE Y- MUTE SO THAT PICTURE APPEAR IN NORMAL MODE.
SCREEN
V11,V12,V13 STEP RANGE 0-255
I2C CONTROL
OPTION SET UP, BUS SET UP
WINDOW PATTERN OR US6 CH LION HEAD
230V
CONFIRMATION ON CRT DISPLAY
[VOLTAGE CONFIRMATION]
SYMBOL REVISED CONTENT,
21V-R
70M
20-1 20-2
ADJUSTMENTITEMADJUSTMENTPOSITION
CONTROL
PRE-ADJUSTREQUIREMENT
CONTENT
INPUTCONDITION
OUTPUT
ADJUSTMENTPROCEDURE
HISTORYOF REVISION
WHITE BALANCE
V14,V15,V11,V12,V13 STEP RANGE 0-127, 0~255
I2C BUS CONTROL
OPTION SET UP, BUS SET UP, SCREEN
23CH 501RE WINDOW PATTERN
230V
CRT SCREEN DISPLAY.
1) WHITE (HIGH BEAM)FIRST LET THE GUN POINT AT BLACK POSITION (AS DRAWINGATTACH), ADJ V04 UNTIL BRIGHTNESS Y BECOME 5 cd/m2 , THENLET THE GUN POINT AT WHITE POSITION (AS DRAWING ATTACH),ADJUST V01 UNTIL BRIGHTNESS Y BECOME 150 cd/m2 , ADJUSTTHE BUS DATA OF V14 (R DRIVE), V15(B DRIVE) UNTIL THE AXISOF COLOR TEMPERATURE BECOME X=0.273, Y=0.280
2) BLACK (LOW BEAM)LET THE GUN POINT AT BLACK POSITION, IF THE VALUE SHIFTEDAWAY FROM THE DATA ADJUSTED IN STEP 1), ADJUST AGAIN THETWO SERVICE DATA WHICH HAVE CHOSEN AT SCREEN ADJUSTSO THAT TO OBTAIN THE SIMILAR AXIS AS ABOVE.*WARNING: DO NOT DISTURB THE MINI STEP GUN DATA DURINGTHIS ADJUSTMENT.**REPEAT STEP 1), 2) TO GET A REGULATED POSITION.
1) LET THE GUN POINT AT BLACK POSITION (AS ATTACH DRAWING),ADJUST V04 BUS DATA UNTIL BRIGHTNESS Y=0.5 cd/m2, THENSTEP DOWN MORE 4 STEP
SUB-BRIGHT
V04 STEP RANGE 0-255
I2C CONTROL
OPTION SET UP, BUS SET UP, SCREEN, WHITE BALANCE
WINDOW PATTERN
230V
CRT SCREEN DISPLAY.
[VOLTAGE CONFIRMATION] BRIGHTNESS Y=0.5 cd/m2, THEN STEP DOWN MORE 4 STEP
SYMBOL REVISED CONTENT,
BLACK US14
21V-R
70M
21-1 21-2
ADJUSTMENTITEMADJUSTMENTPOSITION
CONTROL
PRE-ADJUSTREQUIREMENT
CONTENT
INPUTCONDITION
OUTPUT
ADJUSTMENTPROCEDURE
HISTORYOF REVISION
SUB-PICTURE
V01 STEP RANGE 0-127
I2C BUS CONTROL
OPTION SET UP, BUS SET UP, SCREEN, WHITE BALANCE, SUB-BRIGHTNESS
WINDOW PATTERN
230V
CRT SCREEN DISPLAY.
1) LET THE GUN POINT AT WHITE POSITION (AS ATTACH DRAWING),ADJUST V01 BUS DATA UNTIL BRIGHTNESS Y=150 cd/m2.
NOTE: ALLOWABLE DATA FOR V01 IS >= 90, EVEN Y CAN'T MATCHTHE SPEC
[VOLTAGE CONFIRMATION] BRIGHTNESS Y=150 cd/m2
SYMBOL REVISED CONTENT,
US14
WHITE
ADJUSTMENTITEMADJUSTMENTPOSITION
CONTROL
PRE-ADJUSTREQUIREMENT
CONTENT
INPUTCONDITION
OUTPUT
ADJUSTMENTPROCEDURE
HISTORYOF REVISION
1) GET IN Y-MUTE FUNCTION BY R/C.2) ADJUST THE V02 BUS DATA TO GET A WAVEFORM AS BELOW.3) DISABLE THE Y-MUTE**PLS TAKE NOTE THAT SERVICE MODE DATA F61 NEED TO SET +8
SUB-TINT
V02 STEP RANGE 0-127
I2C CONTROL
OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC
US 10 CH HALF COLOR BAR PATTERN
230V
B-AMP TR BASE (TP853)CONFIRM WITH OSCILLOSCOPE
[CONFIRMATION]
SYMBOL REVISED CONTENT,
B-AMP BASE (TP853)MUST BE IN STEPPINGLEVEL
21V-R
70M
22-1 22-2
ADJUSTMENTITEMADJUSTMENTPOSITION
CONTROL
PRE-ADJUSTREQUIREMENT
CONTENT
INPUTCONDITION
OUTPUT
ADJUSTMENTPROCEDURE
HISTORYOF REVISION
SUB-COLOR
V03 STEP RANGE 0-127
I2C BUS CONTROL
OPTION SET UP, BUS SET UP, VCO ADJ, RF-AGC, SUB-PICT, SUB-TNT
US 10 CH HALF COLOR BAR PATTERN
230V
R-AMP TR BASE (TP851)CONFIRM WITH OSCILLOSCOPE
1) SET THE V03 BUS DATA TO GET A WAVEFORM AS BELOW2) THIS WAVEFORM SHOWS THAT THE 75% WHITE & RED PORTIONS
OF COLOR BAR BEAT AT THE SAME LEVEL
[CHECKING CONFIRMATION]
SYMBOL REVISED CONTENT,
100% WHITE
W Y R BMg
Cy G
*PLEASE TAKE NOTE THAT SERVICE DATA F60 MUST SET TO +10
SET THE USER CONTROL TO SHIPMENT POSITION.
[VOLTAGE CONFIRMATION]CHECK THE VOLTAGE OF P603 PIN 3 AS SPECIFIED BELOW.
[OPERATION CONFIRMATION]SUPPLY THE DC VOLTAGE TO P603 PIN 3 AND MAKE SURE THE PRO-TECTOR IS FUNCTIONED.HORIZONTAL OSCILATION STOP AND PICTURE DISAPPEAR.
[RECOVER INFORMATION]PULL OUT THE AC CORD.
[CAUTION]FROM THE RECOVER CONFIRMATION MENTIONED ABOVE, THE ACCODE MUST BE PULLED OUT AT LEAST 4 SECOND BEFORE PLUG-GING IN AGAIN.(IN ORDER TO MAKE SURE THE u-COM HAS BEENRESET.)
X-RAY PROTECTION OPERATING CONFIRMATION
- STEP RANGE -
-
AFTER ALL ADJUSTMENT FINISHED.
US 6 CH LION HEAD (MONOSCOPE PATTERN)
AC 230V, RF INPUT
CONFIRMATION BY THE CRT
ADJUSTMENTITEMADJUSTMENTPOSITION
CONTROL
PRE-ADJUSTREQUIREMENT
CONTENT
INPUTCONDITION
OUTPUT
ADJUSTMENTPROCEDURE
HISTORYOF REVISION
[VOLTAGE CONFIRMATION]
SYMBOL REVISED CONTENT,
TP VOLTAGE OPERATION VOLTAGE26± 1.1V DC 27V
21V-R
70M
23-1
HIGH VOLTAGE
- STEP RANGE -
-
AFTER ALL ADJUSTMENT FINISHED.
US 6 CH LION HEAD (MONOSCOPE PATTERN)
AC 230V, RF INPUT
CRT ANODE VOLTAGE
SET THE USER CONTROL TO SHIPMENT SETTING POSITION. PUSHON Y-MUTE BY R/C CONFIRM THE VOLTAGE OF CRT ANODE BY HIGHVOLTAGE METER AND MAKE SURE THE READING IS AS BELOW.
[CAUTION POINT] USE ELECTROSTATIC HI-VOLTAGE METER AND FOLLOW THE UL/DHHS STANDARD TO MAKE CORRECTION AND CONTROL.
SYMBOL REVISED CONTENT,
ADJUSTMENTITEMADJUSTMENTPOSITION
CONTROL
PRE-ADJUSTREQUIREMENT
CONTENT
INPUTCONDITION
OUTPUTW
ADJUSTMENTPROCEDURE
HISTORYOF REVISION
HIGH VOLTAGEBELOW 28.5kV
21V-R
70M
24
WAVEFORMS
21V-R70M
25
654321
A
B
C
D
E
F
G
H
CHASSIS LAYOUT
21V-R70M
DUNTKD373WE
PR701
26
654321
A
B
C
D
E
F
G
H
CRT BLOCK DIA GRAM
21V-R70M
27
A
B
C
D
E
F
G
H
I
J
1 2 3 4 5 6 7 8 9 10
MAIN BLOCK DIAGRAM
21V-R70M
C A
PC
FSC 2
TV
AUDIO OUT
AUDIO BYPASS
EX AUDIO IN
VIF VCO
VIF APC
VIF AGC2
VIF AGC1
NC VOLUME
IC303
IC3002REAR FRONT
28
21V-R70M
10 11 12 13 14 15 16 17 18 19
FILT
HLF
V-HOLD
SAV
L-VOL
FR P MONO
POW
29
21V-R70M
DESCRIPTION OF SCHEMATIC DIAGRAMNOTES:1. The unit of resistance "ohm" is omitted.
(K=kW=1000W, M=MW)2. All resistors are 1/16 watt, unless otherwise noted.3. All capacitors are mF, unless otherwise noted.
(P=pF=mmF)4. (G) indicates ±2% tolerance may be used.5. indicates line isolated ground.
VOLTAGE MEASUREMENT CONDITIONS:1. All DC voltages are measured with DVM connected
between points indicated and chassis ground, linevoltage set at 120V AC and all controls set for normalpicture unless otherwise indicated.
2. All voltages measured with 1000mV B & W or Colorsignal.
WAVEFORM MEASUREMENT CONDITIONS:1. Photographs taken on a standard gated color bar
signal, the tint setting adjusted for proper color. Thewave shapes at the red, green and blue cathodes ofthe picture tube depend on the tint, color level andpicture control.
2. indicates waveform check points (See chart,waveforms are measured from point indicated tochassis ground.)
Œ AND SHADED ( ) COMPONENTS= SAFETY RELATED PARTS.
MARK= X-RAY RELATED PARTS.
DRGANNES MARQUES Œ ET HACHRES ( ):PIECES RELATIVES A LA SECURITE.MARQUE : PIECS RELATIVE AUX RAYONS X.
This circuit diagram is a standard one, printed circuitsmay be subject to change for product improvementwithout prior notice.
NOTE: THE PARTS HERE SHOWN ARE SUPPLIED AS ANASSEMBLY BUT NOT INDEPENDENTLY.
Ref. No. Part No.
MARK: X-RAY RELATED PARTS
REPLACEMENT PARTS LIST
To have your order filled promptly and correctly, pleasefurnish the following informations.
Replacement parts which have these special safety characteristicsidentified in this manual; electrical components having such featuresare identified by ! And shaded areas in the Replacement PartsLists and Schematic Diagrams. The use of a substitute replacementpart which does not have the same safety characteristic as thefactory recommended replacement parts shown in this servicemanual may create shock, fire or other hazards.
SPAKCD622WJZZ Packing CaseSPAKAA323WJZZ P-Add TopSPAKAA324WJZZ P-Add BottomSSAKA0172PFZZ PolybagSSAKH0207PJZZ Polybag for Unit
CCABAB162WEA0 Front Cab AssyGCABAB162WJSA Front CabinetHBDGB0206PJSA Sharp BadgeHDECQ0316PJOT R/C LED LensJBTNC0109PJSA Control Button AJBTNC0106PJSB Control Button BJBTNP0120PJSA Power ButtonLANGSA011WJZZ Speaker BracketLX-TZ3004CEFD Screw for ButtonMSPRC0005PEFW Spring (Pow But)XTASD40P12000 Screw