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AOC C787, Service Manual

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AOC C787 Service Manual Download Page 21

20 

6-6  ABNORMAL VERTICAL SCANNING 

 
 

1. ABNORMAL VERTICAL SIZE 

 

OK

NG

OK

NG

READJUST V-SIZE FUNCTION VALUE

RELATIVE CIRCUIT

CHECK VERT. OSC CIRCUIT

RELATIVE CIRCUIT

NG

CHECK THE IC601 PIN 7 ABOUT 40V

CHECK IC601 PIN 6 OUTPUT ABOUT

38Vpp

CHECK ZD601, ZD602 R626 & SMPS

CHECK IC401 PIN 22, 23, 24

CHECK IC401 PIN 12, 13

 

 
 

2. VERTICAL CENTER 

 

NG

READJUST V-CENTER

CHECK IC101 PIN 9, 10

IC401 PIN 18, 19

 

 
 
 

6-7 SIDE-PIN CUSHION DISTORTION 

 

NG

READJUST SIDEPIN

CHECK IC401, Q404, Q405, Q406

RELATIVE CKT.

 

 
 

6-8 POOR FOCUS 

 
 

READJUST FOCUS CONTROL

NG

CHECK FOCUS CONTROL UNIT, FOCUS

LEAD WIRE, CRT SOCKET & CRT

 

Summary of Contents for C787

Page 1: ... SERVICE MANUAL COLOR MONITOR C787 41A50 122 ...

Page 2: ...RVICE INFORMATION ONLY EVERY REASONABLE EFFORT HAS BEEN MADE TO ENSURE THE ACCURACY OF THIS MANUAL WE CANNOT GUARANTEE THE ACCURACY OF THIS INFORMATION AFTER THE DATE OF PUBLICATION AND DISCLAIMS LIABILITY FOR CHANGES ERRORS OR OMISSIONS ...

Page 3: ...10 5 CIRCUIT DESCRIPTION 11 6 TROUBLE SHOOTING CHART 15 6 1 NO RASTER CRT RELATIVE CIRCUIT PROBLEMS 15 6 2 ABNORMAL DISPLAY 17 6 3 NO BLANKING 18 6 4 HOR OSC DEF HV CIRCUIT FAULT 18 6 5 ABNORMAL HORIZONTAL DEFLECTION 19 6 6 ABNORMAL VERTICAL SCANNING 20 6 7 SIDE PIN CUSHION DISTORTION 20 6 8 POOR FOCUS 20 6 9 POWER SUPPLY TROUBLE SHOOTING CHART 21 7 MECHANICAL OF CABINET FRONT DIS ASSEMBLY 22 8 PA...

Page 4: ...egative Negative Negative Positive Vert Sync TTL Level TTL Level TTL Level TTL Level Positive Negative Negative Positive Horizontal 640 H 720 H 640 H 800 H Vertical 480 V 400 V 480 V 600 V Fh KHz 31 47 31 47 43 3 53 67 Fv Hz 60 70 85 85 Mode 5 Mode 6 Mode 7 RGB Analog RGB Analog RGB Analog Horiz Sync TTL Level TTL Level TTL Level Positive Positive Positive Vert Sync TTL Level TTL Level TTL Level P...

Page 5: ...re 0 C to 40 C Ambient 13 Humidity 10 to 85 Relative Non Condensing 14 Weight 16 0 Kgs Net 19 5Kgs Gross 15 Dimensions Monitor Carton 570 W x 537 H x 565 D mm Monitor 420 W x 450 H x 435 D mm 16 External Connection 15 Pin D type Connector AC Power Cord 17 Regulations TÜV ERGO TÜV GS CE MPR II NEMKO TCO 95 ...

Page 6: ...er volt or with more sensitivity in the following manner Connect a 1500 ohms 10 Watt resistor paralleled by a 0 15UF AC type capacitor between a known good earth ground water pipe conduit etc and the exposed metallic parts simultaneously Measure the AC voltage across the combination of 1500 ohms resistor and 0 15UF capacitor c Reverse the AC plug at the AC outlet and repeat AC voltage measurements...

Page 7: ...pply It is important to maintain specified values of all components in the horizontal and high voltage circuits and anywhere else in the monitor that could cause a rise in high voltage or operating supply voltages No changes should be made to the original design of the monitor Components shown in the shaded areas on the schematic should be replaced with exact factory replacement parts The use of u...

Page 8: ...s on the connector to ensure firm grounding The connector information is as follow 15 Pin Color Display Signal Cable PIN NO DESCRIPTION PIN NO DESCRIPTION 1 RED 9 5V 2 GREEN 10 GND 3 BLUE 11 SYNC GND 4 GND 12 SDA 5 GND 13 HORIZ SYNC 6 GND R 14 VERT SYNC VCLK 7 GND G 15 SCL 8 GND B 3 Apply power to the display by turning the power switch to the ON position and allow about thirty seconds for display...

Page 9: ... Chrome 2000 Signal generator or PC equivalent set mode 1 VGA 640X480 pattern 1 0 B Connect a DC Volt meter between TP901 or D922 cathode and ground then adjust VR901 to be 14 5VDC C Connect a DC Volt meter between TP902 or D925 cathode and ground then adjust VR902 to be 60 5 VDC D Connect a DC Volt meter between TP701 G1 and ground Brightness set to max Then adjust VR702 to be 50 VDC 2 Factory pr...

Page 10: ...N V CENTER B GAIN V SIZE R BIAS ZOOM G BIAS TOP COMER R BIAS BOTTOM COMER 9300 COLOR TEMPERATURE PINCUSHION 6500 COLOR TEMPERATURE TRAPEZOID DEGAUSS PIN BALANCE OSD EXIT PARALLELOGRAM RETURN ROTATION Vs LINEAR Vs SUB V SIZE Vc LINEAR Vc SUB V CENTER MENU Key to Quit the OSD window Mean while the new setting data will be saved in the memory ...

Page 11: ... B Gain R Gain to make color temperature x 283 10 y 297 10 C Recheck item A B to make sure both of them in spec Finally select OSD function to the 9300 K function then press the MENU Key To make the setting data saved in the memory D The adjustment of 6500 K white Balance May follow step A C with the x 313 10 y 329 10 E Full white luminance a Set mode 2 640 480 Fh 31 5KHz full white pattern b Imag...

Page 12: ...ged by varying the two tabs together keeping the angle between them constant 5 CIRCUIT DESCRIPTION 5 1 MICRO CONTROLLER CIRCUIT MICRO Controller The IC101 contains a 6502 8 bit CPU core 256 bytes of RAM 16K bytes of ROM 14 channel 8 bit PWM D A converters 2 channel A D converters for key detection one 8 bit pre loadable base timer internal H sync and V sync signals processor providing mode detecti...

Page 13: ...d an extensive set of geometry control facilities Further the IC generates the drive waveforms for DC coupled vertical boosters to the TDA 4866 ref Page 28 Horizontal Oscillator The oscillator is of the relaxation type and requires a capacitor of 10nF C403 at pin 29 The maximum oscillator frequency is determined by a resistor R403 form pin 28 to ground A resistor R402 from pin27 to pin28 defines t...

Page 14: ...e and Modulation Diode Q416 B MUTE D414 D417 Buffer Diode for IC403 D421 D423 Detected for q406 Q401 B Mute Control Q402 Horizontal Driver Q403 Horizontal Out Q404 A Amp for Drive Q406 Q405 Darlington Transistor for H Size Control Q407 Horizontal Linearity Correction Control Q410 Q412 Q417 Horizontal S Correction Control Q418 Q420 Horizontal S Correction Control ZD602 VF Voltage Divider D707 Mixin...

Page 15: ...iode for Trigger CKT D925 Rectifier for B Supply D926 D927 Raster Position Control D939 Clip Diode for Snuffer Pulse ZD901 Protection Diode ZD902 Protection Diode ZD903 Protection Diode Q901 MOS FET for Switching Power Control Q904 Q906 Start up CKT for IC901 Q908 Q916 To Turn 6 3V Supply Off when the Off Mode is Required Q909 Q910 To Turn 14 5V Supply Off when the Off or Suspend Mode is Required ...

Page 16: ...IGE VOLTAGE CHECK THE VOLTAGE OF CRT HEATER ABOUT 6 3V CHECK VOLTAGE OF THE CRT CHECK BRIGHTNESS CIRCUIT OK CHECK POWER SAVING CIRCUIT ABNORMAL DISPLAY H SYNC V SYNC SIGNAL REFER ITEM 8 2 CATHODE ABOUT 60V TO 70V CHECK SCREEN VOLTAGE ABOUT 400V TO 700V OF CRT ABOUT 25 5 26 5KV LESS THAN 300V CHECK FBT CHECK MAIN PCB POWER SUPPLY 60 5V 14 5V 80V CHECK FAILSAFE CKT IC401 PIN 2 RELATIVE CKT Q703 Q706...

Page 17: ...K SIGNAL CABLE OR INTERFACE CARD CONTRAST SET MAX OR IC401 PIN 16 OUTPUT CHECK IC801 PIN 13 ABOUT 4V PIN 6 9 22 ABOUT 12V CHECK IC801 PIN 15 CLAMP PULSE PIN 18 20 23 ABOUT 4Vpp CHECK THE IC105 RELATIVE CIRCUIT PIN 16 BLANK PULSE PIN 26 27 28 ABOUT 4V OR CHECK Q801 AND RELATIVE CKT 3 ABNORMAL DDC PLUG PLAY OK NG CHECK IC101 PIN 5 VOLTAGE ABOUT 5V CHECK SIGNAL CABLE OR H802 PIN 3 4 DATA OUTPUT CHECK...

Page 18: ...F CRT CATHODE ABOUT 40Vpp CHECK THE VOLTAGE OF FBT SCREEN CHECK THE RELATIVE CIRCUIT CHECK THE 12V PIN OF SMPS ON MAIN PCB RELATIVE CIRCUIT OF P802 CONNECTOR ABOUT 400V TO 700V EXCEED 700V OF IC801 CHECK FBT CRT RELATIVE CIRCUIT OR REFER ITEM 7 1 VIDEO PCB ABOUT 80V CHECK THE 80V RELATIVE CIRCUIT CHECK VIDEO IC801 VCC ABOUT 12V OF IC801 PIN 18 20 23 ABOUT 3Vpp CHECKTHE VQ802 Q807 ...

Page 19: ...R OSC DEF HV CIRCUIT FAULT 1 NO RASTER DISCONNECT WITH SIGNAL CABLE NG OK OK OK NG NG NG CHECK THE COLLECTOR VOLTAGE CHECK THE COLLECTOR VOLTAGE RELATIVE CIRCUIT RELATIVE CIRCUIT CHECK IC401 PIN 26 31 CHECK Q402 T401 CHECK T401 T402 Q402 Q403 OF Q402 ABOUT 40Vpp OF Q403 ABOUT 1100Vpp AT FH 31KHz D408 C418 C419 H DY CHECK IC401 PIN 10 ABOUT 11 5 VDC CHECK IC401 PIN 8 WAVE FORM ABOUT 10Vpp CHECK IC4...

Page 20: ...CHECK THE HV OF CHECK FBT B VOLTAGE Q911 Q912 Q914 Q915 IC401 PIN 4 5 6 VR 902 ABOUT 60 5V AT FH 31KHz CRT ABOUT 26KV 2 ABNORMAL HORIZONTAL RASTER CENTER P403 AND JUMPER CHECK T903 D926 D927 R964 R968 3 ABNORMAL HORIZONTAL VIDEO CENTER CHECK IC101 PIN 9 10 IC401 PIN 18 19 4 ABNORMAL HORIZONTAL LINEARITY CHECK L401 Q407 R447 C448 AND IC101 PIN 20 21 22 23 CS SWITCHER IC403 Q410 Q411 Q420 ...

Page 21: ...ABOUT 40V CHECK IC601 PIN 6 OUTPUT ABOUT 38Vpp CHECK ZD601 ZD602 R626 SMPS CHECK IC401 PIN 22 23 24 CHECK IC401 PIN 12 13 2 VERTICAL CENTER NG READJUST V CENTER CHECK IC101 PIN 9 10 IC401 PIN 18 19 6 7 SIDE PIN CUSHION DISTORTION NG READJUST SIDEPIN CHECK IC401 Q404 Q405 Q406 RELATIVE CKT 6 8 POOR FOCUS READJUST FOCUS CONTROL NG CHECK FOCUS CONTROL UNIT FOCUS LEAD WIRE CRT SOCKET CRT ...

Page 22: ... OK NG NG NG OK OK OK NG OK NG YES NO CHECK BRIDGE RECTIFIED CIRCUIT 6 3V CIRCUIT CHECK START C K T CHECK POWER SAVING C K T OFF MODE CHECK IC401 CHECK D919 CHECK Q911 Q911 FAILURE CHECK Q901 CHECK IC901 CHECK AC LINE VOLT 120V OR 220V CHECK F901 SW901 CHECK LINE RECTIFIED SMOOTHED VOLT CHECK Q901 IC901 FAILURE CHECK T901 O P MAKE SURE THAT THE VARIABLE OK D909 Q904 R922 R925 CHECK Q912 Q914 Q915 ...

Page 23: ... 22 7 MECHANICAL OF CABINET FRONT DIS ASSEMBLY ...

Page 24: ...EL 40A 154 14 CABINET LABEL 40A 154 501 HI POT GROUNDING LABEL 40A 2026 622 ID LABEL 40A 581 26 668 SLZ LABEL 40A 581 26 704 LABEL 41A 68 508 A CARD 41A 68 622 1B WARRANTY CARD 41A 526 622 MANUAL 44A 3211 1 EPS CUSHION 44A 3211 2 EPS CUSHION 44A 3211 622 1B CARTON 45A 76 20 RN PE BAG 45A 76 28 RN PE BAG 45A 76 34 RN PE BAG 45A 77 3 TRANSPARENT SHEET 45A 77 500 BARCODE RIBBON 45A 77 501 BARCODE RIB...

Page 25: ...0 062 WIRE C411 67A 309 102 3 1000Uf 20 16V C414 67A 305 470 9L 47UF 20 100V C418 63A 210J 512 7FC 5 1NF 5 1 6KV C419 63A 210J 512 5FC 5100PF C425 64A 210J 274 3CC 0 27uF 5 400V C426 63A 210J 644 2CC 0 64uF 5 250V C429 63A 210J 474 2CC 0 47uF 5 250V C430 65A 1K 471 5A 470PF 10 1KV C431 64A 100J 225 59 2 2uF 100V C439 63A 210J 274 2CC 0 27uF 5 250V C449 65A 2K 331 5A 330PF 2KV C453 63A 210J 244 2CC...

Page 26: ...WIRE H805 95A 8013 7 508 WIRE IC101 56A 1125 41 CPU IC103 56A 1131 5 MTV016N IC401 56A 552 1 TDA4856 IC102 56A 1133 14 IC AT24C08 10PC IC105 56A 74LS 14 H 14 PIN IC 74LS14 IC403 56A 212 2 14P IC LM324N IC404 56A 212 2 14P IC LM324N IC901 56A 379 9 8P IC KA3842A JR15 95A 90 23 TIN COATED L401 73A 147 104 T LINEARITY COIL L402 73A 253 109 L CHOKE COIL L404 73A 253 106 L CHOKE COIL L901 73A 174 16 L ...

Page 27: ...7 112 LA DRIVER X FMR T903 79A 167 111 LA DRIVER X FMR TP401 9A 211 2 PIN TP701 9A 211 2 PIN TP901 9A 211 2 PIN VR701 75A 335 223 22K OHM 30 VR702 75A 335 204 200K OHM 30 VR703 75A 335 104 100K OHM 30 VR901 75A 335 101 100 OHM 30 VR902 75A 335 473 47K OHM 30 WJ100 95A 201 69 051 WIRE WQ405 95A 202 59 072 WIRE X101 93A 22 22 H HC 49 U8 000 MHZ ZJ100 93A 39 526 52T ROHMMTZJ5 1B ZQ405 93A 39 517 52T ...

Page 28: ... 47uF 20 25V C435 65A 450 104 7T 0 1uF 80 20 Y5V 50V C436 65A 444 103 5T 0 01uF 10 50V Y5P C437 67A 309 109 7T 1 0uF 20 50V C440 65A 444 103 5T 0 01uF 10 50V Y5P C441 67A 309 109 7T 1 0uF 20 50V C444 65A 442 181 13T 180PF 5 50V NPO C445 64A 176J 104 0T 0 1uF 5 63V C447 67A 305 109 7T 1UF 20 50V C448 65A 444 681 1T 680PF 50V C451 65A 444 101 5T 100PF 10 Y5P 50V C454 65A 444 103 5T 0 01uF 10 50V Y5P...

Page 29: ... 21Z 52T FAST RECOVERY DIODE D407 93A 60 21Z 52T FAST RECOVERY DIODE D409 93A 64 11 52T DIODE IN4148 D410 93A 64 501 52T DIODE BAV21 D411 93A 64 11 52T DIODE IN4148 D413 93A 64 11 52T DIODE IN4148 D414 93A 60 21Z 52T FAST RECOVERY DIODE D415 93A 60 21Z 52T FAST RECOVERY DIODE D416 93A 60 21Z 52T FAST RECOVERY DIODE D417 93A 60 21Z 52T FAST RECOVERY DIODE D418 93A 64 11 52T DIODE IN4148 D419 93A 60...

Page 30: ... J026 95A 90 23 TIN COATED J027 95A 90 23 TIN COATED J028 95A 90 23 TIN COATED J029 95A 90 23 TIN COATED J030 95A 90 23 TIN COATED J032 95A 90 23 TIN COATED J033 95A 90 23 TIN COATED J034 95A 90 23 TIN COATED J035 95A 90 23 TIN COATED J036 95A 90 23 TIN COATED J037 95A 90 23 TIN COATED J038 95A 90 23 TIN COATED J039 95A 90 23 TIN COATED J041 95A 90 23 TIN COATED J042 95A 90 23 TIN COATED J043 95A ...

Page 31: ...3 TIN COATED J094 95A 90 23 TIN COATED J095 95A 90 23 TIN COATED J096 95A 90 23 TIN COATED J098 95A 90 23 TIN COATED J099 95A 90 23 TIN COATED J101 95A 90 23 TIN COATED J102 95A 90 23 TIN COATED J103 95A 90 23 TIN COATED J104 95A 90 23 TIN COATED J105 95A 90 23 TIN COATED J106 95A 90 23 TIN COATED J107 95A 90 23 TIN COATED J108 95A 90 23 TIN COATED J109 95A 90 23 TIN COATED J110 95A 90 23 TIN COAT...

Page 32: ...Q912 57A 446 1 T TR 2SC1213AC Q913 57A 419 SG T TR KSC945GC Q914 57A 419 SG T TR KSC945GC Q915 57A 619 1 T TR 2SA673AC Q916 57A 419 SG T TR KSC945GC R101 61A 602 562 52T 5 6K OHM 5 1 6W R102 61A 602 272 52T 2 7K OHM 5 1 6W R103 61A 602 392 52T 3 9K OHM 5 1 6W R104 61A 602 682 52T 6 8K OHM 5 1 6W R105 61A 602 472 52T 4 7K OHM 5 1 6W R106 61A 602 472 52T 4 7K OHM 5 1 6W R107 61A 602 103 52T 10K OHM ...

Page 33: ...OHM 5 1 4W R410 61A 602 221 52T 220 OHM 5 1 6W R411 61A 172 104 52T 100K OHM 5 1 4W R412 61A 602 101 52T 100 OHM 5 1 6W R413 61A 210 153 52T 15K OHM 1 1 6W R414 61A 602 222 52T 2 2K OHM 5 1 6W R415 61A 602 102 52T 1K OHM 5 1 6W R416 61A 602 101 52T 100 OHM 5 1 6W R417 61A 172 102 52T 1K OHM 5 1 4W R418 61A 602 183 52T 18K OHM 5 1 6W R419 61A 602 104 52T 100K OHM 5 1 6W R420 61A 172 103 52T 10K OHM...

Page 34: ...OHM 5 1 2W R628 61A 210 272 52T 2 7K OHM 1 1 6W R635 61A 602 682 52T 6 8K OHM 5 1 6W R636 61A 602 472 52T 4 7K OHM 5 1 6W R638 61A 602 103 52T 10K OHM 5 1 6W R639 61A 602 103 52T 10K OHM 5 1 6W R701 61A 602 103 52T 10K OHM 5 1 6W R702 61A 602 913 52T 91K OHM 5 1 6W R703 61A 602 622 52T 6 2K OHM 5 1 6W R704 61A 172 182 52T 1 8K OHM 5 1 4W R705 61A 602 101 52T 100 OHM 5 1 6W R706 61A 602 100 52T 10 ...

Page 35: ...38 61A 172 220 52T 22 OHM 5 1 4W R939 61A 172 203 52T 20K OHM 5 1 4W R940 61A 171 183 52T 18K OHM 2 1 4W R941 61A 172 101 52T 100 OHM 5 1 4W R942 61A 172 101 52T 100 OHM 5 1 4W R954 61A 175L 203 52T 20K OHM 5 1 2W R956 61A 172 272 52T 2 7K OHM 5 1 4W R957 61A 172 473 52T 47K OHM 5 1 4W R958 61A 175L 102 52T 1K OHM 5 1 2W R960 61A 602 473 52T 47K OHM 5 1 6W R962 61A 172 220 52T 22 OHM 5 1 4W R963 6...

Page 36: ...85QJAI SPECIFICATION 715A 669 2A CRT PC BOARD C801 67A 309 100 7T 10uF 20 50V C802 67A 309 100 7T 10uF 20 50V C803 67A 309 100 7T 10uF 20 50V C804 67A 305 101 3T 100uF 20 16V C805 65A 450 104 7T 0 1uF 80 20 Y5V 50V C806 67A 309 100 7T 10uF 20 50V C807 67A 309 100 7T 10uF 20 50V C808 67A 309 100 7T 10uF 20 50V C809 67A 309 100 7T 10uF 20 50V C811 67A 309 100 7T 10uF 20 50V C812 64A 176J 104 1T 0 1u...

Page 37: ...500V 10 C858 65A 517K 102 1T 1NF 500V 10 C862 65A 442 100 13T 10PF 5 NPO 50V C863 65A 442 100 13T 10PF 5 NPO 50V C864 65A 442 100 13T 10PF 5 NPO 50V D801 93A 64 11H 52T DIODE IN4148 D802 93A 64 11H 52T DIODE IN4148 D803 93A 64 11H 52T DIODE IN4148 D804 93A 64 11H 52T DIODE IN4148 D805 93A 64 11H 52T DIODE IN4148 D806 93A 64 11H 52T DIODE IN4148 D807 93A 64 11H 52T DIODE IN4148 D808 93A 64 11H 52T ...

Page 38: ...9 5T 2 2UH L807 73A 54 478 10T 0 47UH L808 73A 54 478 10T 0 47UH L809 73A 54 478 10T 0 47UH Q801 57A 420 SG T TR KSA733GC Q805 57A 516 1 T TR PH2369 Q806 57A 516 1 T TR PH2369 Q807 57A 516 1 T TR PH2369 Q808 57A 744 2 T TR BFQ221 Q809 57A 744 2 T TR BFQ221 Q810 57A 744 2 T TR BFQ221 Q811 57A 745 2 T TR BFQ241 Q812 57A 745 2 T TR BFQ241 Q813 57A 745 2 T TR BFQ241 Q817 57A 493 10 T TR BF422 Q818 57A...

Page 39: ...M 5 1 2W R849 61A 175L 131 52T 130 OHM 5 1 2W R850 61A 175L 131 52T 130 OHM 5 1 2W R851 61A 602 682 52T 6 8K OHM 5 1 6W R852 61A 602 682 52T 6 8K OHM 5 1 6W R853 61A 602 682 52T 6 8K OHM 5 1 6W R854 61A 602 330 52T 33 OHM 5 1 6W R855 61A 602 330 52T 33 OHM 5 1 6W R856 61A 602 330 52T 33 OHM 5 1 6W R857 61A 602 470 52T 47 OHM 5 1 6W R858 61A 602 470 52T 47 OHM 5 1 6W R859 61A 602 470 52T 47 OHM 5 1...

Page 40: ... 39 ...

Page 41: ...6007 2 BUSHING 90A 351 500 A HEAT SINK M1A 1730 10 128 SCREW IC601 56A 5002 1 TDA 4866 PARTS LIST OF IC904 ASS Y LOCATION PARTS No SPECIFICATION 90A 360 1 HEAT SINK M1A 1730 8 128 SCREW IC904 56A 133 12 STM 3 PIN 12V REG L7812CV PARTS LIST OF Q403 Q405 Q911 D408 ASS Y LOCATION PARTS No SPECIFICATION 3A 1 4 106 LOCK WASHER 5A 42 501 NYLON WASHER 12A 372 1 RUBBER 90A 363 520 HEAT SINK M1A 1730 8 128...

Page 42: ...RTS LIST OF SAMPO FBT ASS Y LOCATION PARTS No SPECIFICATION R405 61A 172 822 52T 8 2K OHM 5 1 4W R408 61A 172 392 52T 3 9K OHM 5 1 4W T402 79A 769 1 C FBT FEA915 PARTS LIST OF AC IN SOCKET ASS Y LOCATION PARTS No SPECIFICATION 95A 800 2 2C WIRE CORE ASS Y 96A 29 6 190 H S TUBING CN901 87A 501 5 RECEPTACLES 0714 PARTS LIST OF CRT ALTERNATION LOCATION PARTS No SPECIFICATION 750A 5866 2AV 17 LG 27 TC...

Page 43: ... 42 ...

Page 44: ... 43 9 BLOCK DIAGRAM ...

Page 45: ... 44 ...

Page 46: ... 45 10 IC BLOCK DIAGRAM ...

Page 47: ... 46 IC401 TDA4856 41 ...

Page 48: ... 47 ...

Page 49: ...2 GND 3 OUTPUT 2 INPUT 1 ELEMENT PASS SERIES PROTECTION THERMAL PROTECTION SOA AMPLIFIER ERROR VOLTAGE REFERENCE GENERATOR CURRENT CIRCUIT STARTING IC102 VCC MODE WC SCL SDA VSS E2 E1 PRE 1 2 3 4 5 6 7 8 ST24W08 24C08 ...

Page 50: ... 49 ...

Page 51: ... 50 ...

Page 52: ... 51 11 2 CRT BOARD LAYOUT ...

Page 53: ... 52 12 SCHEMATIC DIAGRAM ...

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