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SERVICE MANUAL Colour Television

Product Code: 1 113 378 15

Original Version

Chassis Series: LC1-B

F5TT

FILE NO.

Model No. C20LB87B

Service Ref. No. C20LB87B-00

(Argentina)

Give complete “SERVICE REF. NO.” for parts
order or servicing. It is shown on the rating
plate at the cabinet back of the unit.

This T.V. receiver will not work properly in
foreign countries where the television trans-
mission system and power source differ from
the design specifications. Refer to the specifi-
cation table.

VIDEO
MODE

AUDIO
MODE

POWER

▲

▼

VOL

RECALL

MENU

IMAGE

SLEEP

DISPLAY

MUTE

FXMR

VOL

Specifications

Power Source . . . . . . . . . AC220V, 50Hz / 60Hz
Receiving System . . . . . . PAL (M/M, N/N), NTSC (M/M)
Channel Coverage

Antenna mode VHF: CH02-CH13, UHF: CH14-CH69

CATV mode VHF band: CH01-CH13, Mid band: CH14-CH22

Super band: CH23-CH36, Hyper band: CH37-CH64
Ultra band: CH65-CH94 and CH100-CH125
Low mid band: CH95-CH99

Video IF . . . . . . . . . . . . . 45.75MHz
Aerial Input Impedance . . 75

Ω

Ext. Terminals

Video inputs: Phono jack

2(1Vp - p, 75

Ω)

Audio inputs: Phono jack

2 (436mVrms, more than 40K

Ω)

Speaker . . . . . . . . . . . . . 5cm

9cm

Sound Output (Music) . . . 2.0W
Dimensions . . . . . . . . . 496(W)

464(H)

472(D)mm

Weight . . . . . . . . . . . . . approx. 16.7Kg

Specifications subject to change without notice.

VIDEO

AUDIO

MENU

VOL

Содержание C20LB87B

Страница 1: ...AUDIO MODE POWER 0 7 1 4 8 5 2 3 6 9 CH VOL RECALL MENU IMAGE SLEEP DISPLAY MUTE FXMR VOL Specifications Power Source AC220V 50Hz 60Hz Receiving System PAL M M N N NTSC M M Channel Coverage Antenna mode VHF CH02 CH13 UHF CH14 CH69 CATV mode VHF band CH01 CH13 Mid band CH14 CH22 Super band CH23 CH36 Hyper band CH37 CH64 Ultra band CH65 CH94 and CH100 CH125 Low mid band CH95 CH99 Video IF 45 75MHz A...

Страница 2: ...source of X RADIATION in television receiver is the picture tube The picture tube is specially con structed to limit X RADIATION emissions For continued X RADIATION protection the replacement tube must be the same type as the original including suffix letter Excessive high voltage may produce potentially hazardous X RADIATION To avoid such hazards the high voltage must be maintained within specifi...

Страница 3: ...O IN EXT VIDEO IN SOUND CARRIER TRAP 4 5MHz R G B Q901 CRT HV T401 F B T DEFLECTION YOKE Q432 HORIZ OUT SP902 AUDIO FRONT AV IN VIDEO SDA SCL 3 4 IC801 CPU QXXAVB602 X TAL SW2 PAL N 33 34 R G B BLK 19 20 21 22 1 2 SDA SCL A101 X131 SDA SCL 10 14 6 7 IF IN IC201 QXXAVB488M IF VIDEO CHROMA DEFLECTION 1 CHIP IC R G B BLK 27 23 28 30 34 36 52 3 45 12 21 VERT OUT HORIZ OUT 18 19 20 IC501 LA7840 40 32 F...

Страница 4: ...SD RED OUT OSD GREEN OUT OSD BLUE OUT DEFLECTION CIRCUIT HORIZ SYNC IN ACTIVE LOW VERT SYNC IN ACTIVE LOW POWER PROTECT IN POWER ERROR LOW POWER CIRCUIT etc SCL SDA IC802 MEMORY OSC 32 768KHZ CPU OSC OUT CPU OSC IN LED ON TIMER LED OUT ON LOW RC SIGNAL IN ACTIVE LOW RC PRE AMP 30 VOLUME OUT IC001 AUDIO AMP A101 TUNER RESET IN RESET LOW 13 X TAL SW1 PAL M ON HIGH 33 X TAL SW2 PAL N ON HIGH 34 15 VI...

Страница 5: ...IN H VCC SECAM REF V SIZE SERVICE SW H OSC SELF ADJ CLAMP 50 60 OUT R TINT B R DRIVE B G ABCL ABCL ID CUT BLUEBACK WHITE BACK COLOR CONTRAST SERVICE BRIGHT STATION DET STATION SYSTEM SET SYSTEM IF AGC DELAY ADJ DEFEAT DL TIME DL FINE VIDEO VCC VIDEO GND DEFLECTION GND TRAP SW D TRAP F TRAP BLACK STRECH OFF F AGC VIDEO DET VIF AMP APC DET ADJ DET BLACK STRECH VIDEO TONE CHROMA TRAP VIDEO MUTE CLAMP...

Страница 6: ...curs during TV reception the TV set goes to the stand by mode When an abnormality occurs during TV reception it causes pin 27 of the CPU to go continually Low less than 0 75V for about one second The CPU detects that this has occurred and outputs the signal from pin 31 to switch off the power supply lines Releasing the protective circuit and restoring power supply To release the protective circuit...

Страница 7: ...he TV set then press 0 button on the remote control transmitter The following picture appears on the screen This completes the initialization of memory IC 02 Following shows the initialized contents of memory data by this procedure 1 TV AV mode TV mode 2 Antenna or cable setting Antenna 3 Colour system AUTO 4 Channel Memory Clear 5 Receiving Channel Ch02 6 Sound Volume 11 63 steps 7 Color 30 63 st...

Страница 8: ...etting 16 BBK 00 00 01 Blue back setting 17 AFCG 02 00 02 AFC gain adjustment 18 RBI 00 00 255 Red bias adjustment 19 GBI 00 00 255 Green bias adjustment 20 BBI 00 00 255 Blue bias adjustment 21 RD 64 00 127 Red drive adjustment 22 BD 64 00 127 Blue drive adjustment 23 DRV White balance adjustment 24 Y cut setting 25 CCD 20 1 31 Caption H Position Adjustment Service mode adjustments table in CPU R...

Страница 9: ...m Data value Data value for Red Display for DRV White balance adjustment Read Status Item No Item Data value for Blue To return to normal TV mode press the MENU button on the TV set or remote control handset 2 Select item by pressing the CHANNEL DOWN Item No UP or CHANNEL UP Item No DOWN button on the remote control handset 3 Adjust data value by pressing the VOLUME or VOLUME button on the remote ...

Страница 10: ... 2 Select AGC in the service mode 3 Change value until the snow noise just disappears 4 Exit from the service mode 1 Connect DC meter to TP D and the ground 2 Tune the receiver to the clearest station 3 Disconnect RF input Disconnect antenna plug from the antenna socket 4 Select same channel If you have selected channel 03 in step 2 press 0 button next 3 button on the remote control to select chan...

Страница 11: ...rightness of each colour until a dim white line produced Please see the control button alloca tions in this mode 7 Select Item 23 DRV mode to enter the white balance adjusting mode 8 Press the 7 Red Drive CHANNEL RECALL Red Drive 8 Blue Drive or 0 Blue Drive button alternately to produce normal black and white picture 9 Exit from the service mode 10 Check for proper grey scale tracking at all brig...

Страница 12: ... or VOLUME button on the remote control handset or TV set to make fine tuning adjustment Press and hold the VOLUME button for higher frequency tuning and press and hold the VOLUME or lower frequency tuning 0 VOL RECALL MENU IMAGE SLEEP CH VOL DISPLAY MUTE VOL This adjustment is used to do a fine tuning of the channels with poor reception after they have been stored by the automatic tuning This fun...

Страница 13: ...o normal and contrast to maximum 3 Adjust the focus control on the F B T for the best focus on the screen centre FOCUS ADJUSTMENT F B T 4 Connect a high voltage probe to anode lead of the picture tube 5 The high voltage must be 25KV 1KV and less than 27 5KV at 0 beam current Brightness and contrast minimum setting Note If the picture tube is replaced check the high voltage The horiz width adjustme...

Страница 14: ...part of the picture screen is coloured adjust the Deflection Yoke position forward or backward slightly 8 Tighten the mounting screw of the Deflection Yoke Adjust Convergence next CENTRE CONVERGENCE ADJUSTMENT 1 Use a dot crosshatch pattern signal 2 Turn Red and Blue guns on and turn off Green gun Adjust the angle between the Tabs of the Four Pole Magnet 1 and 2 and superimpose the Red and Blue ve...

Страница 15: ...G 8 645 029 2590 ASSY REMOCON FXMR 9 610 273 0173 RC BATTERY LID 10 645 004 3925 ANT MATCHING BOX or 645 005 0251 ANT MATCHING BOX 610 297 1651 INSTRUCTIONS MANUAL Key No Part No Description Key No Part No Description Note Parts order must contain Service Ref No Part No and descriptions VIDEO AUDIO MENU CH VOL AUDIO IN ANT 75Ω R L VIDEO IN VIDEO MODE AUDIO MODE POWER 0 7 1 4 8 5 2 3 6 9 CH VOL REC...

Страница 16: ...fety should be considered when a component replacement is made in any area of a receiver Components indicated by a mark in this parts list and the circuit diagram show components whose value have special significance to product safety It is particularly recommended that only parts specified on the following parts list be used for components replacement pointed out by the mark Note Parts order must...

Страница 17: ...79 M7 TB 405 163 1503 TR 2SA1179N M6 TB 405 163 2708 TR 2SA1179N M7 TB Q861 405 134 5905 TR 2SA1037AK T146 R 405 147 2205 TR 2SA1037AK S T146 405 002 0308 TR 2SA1037K T146 R 405 002 0407 TR 2SA1037K T146 S 405 002 6706 TR 2SA1179 M6 TB 405 002 6904 TR 2SA1179 M7 TB 405 163 1503 TR 2SA1179N M6 TB 405 163 2708 TR 2SA1179N M7 TB Q871 405 014 4509 TR 2SC2412K T146 R 405 014 4608 TR 2SC2412K T146 S 405...

Страница 18: ...K 400V C609 404 073 5106 CERAMIC 470P K 250V 404 073 3300 CERAMIC 470P M 250V 404 071 4507 CERAMIC 470P K 400V C613 403 056 8103 POLYESTER 1000P K 50V C614 403 067 5603 MT COMPO 0 1U J 50V C615 403 058 2604 POLYESTER 0 015U J 50V 403 311 9609 POLYESTER 0 015U J 50V C616 403 247 0008 CERAMIC 1500P K 2K 403 263 6602 CERAMIC 1500P K 2K C617 403 059 6205 POLYESTER 0 022U K 50V 403 312 0506 POLYESTER 0...

Страница 19: ...W R447 401 026 7002 CARBON 3 9K JA 1 6W R448 401 010 3102 CARBON 470 JA 1 2W R451 401 013 7305 CARBON 120K JA 1 4W R453 401 024 7004 CARBON 1K JA 1 6W R454 401 024 7400 CARBON 10K JA 1 6W R455 401 012 8105 CARBON 100K JA 1 4W R461 401 025 4903 CARBON 180K JA 1 6W R462 401 026 9907 CARBON 4 7K JA 1 6W R481 401 061 0808 OXIDE MT 3 9 JA 1W R491 401 008 3800 CARBON 2 2 JB 1 2W R501 401 018 2800 CARBON...

Страница 20: ...J7 5A 407 057 6304 ZENER DIODE RD7 5EB1 D103 407 100 0204 ZENER DIODE MTZJ36A 407 056 2307 ZENER DIODE RD36EB1 D191 408 008 2406 DIODE 1N4148 407 013 4306 DIODE 1S2076A D1910 407 116 6504 LED SLP 181B 51 D350 408 008 2406 DIODE 1N4148 407 013 4306 DIODE 1S2076A D351 407 099 6003 ZENER DIODE MTZJ9 1B 407 057 9701 ZENER DIODE RD9 1EB2 D381 407 063 8903 ZENER DIODE MTZJ5 6C 407 057 0104 ZENER DIODE R...

Страница 21: ...2SC2621 E RA 405 066 9903 TR 2SC2688 1 K 405 067 0008 TR 2SC2688 1 L 405 067 0107 TR 2SC2688 1 M 406 000 3605 TR 2SC3620 LB SAN 1 Q711 405 041 6507 TR 2SC2621 D RA 405 041 6705 TR 2SC2621 E RA 405 066 9903 TR 2SC2688 1 K 405 067 0008 TR 2SC2688 1 L 405 067 0107 TR 2SC2688 1 M 406 000 3605 TR 2SC3620 LB SAN 1 Q721 405 041 6507 TR 2SC2621 D RA 405 041 6705 TR 2SC2621 E RA 405 066 9903 TR 2SC2688 1 K...

Страница 22: ... 2KCA KK0 015 GQBZ X 1 10GZ 0CA KZ 0 01GQFZ 150K EM2 2 1 10GJ 33KCA 1 10GJ 47KCA P X X X EM10 X 35EM220 KZ0 01 GQFZ X 2 2K J DJ330 15K 33K 820 CJ93CN X X EM01Z ED0448 LA7840 35EM 470 J X 1 10GJ 4 7KCA 1K MTZJ20B RD20EB2 1 10GJ 820CA 16EM 10 X AH EM1 J10EA030N J10EA030N 1 10GJ 10KCA 1 10GJ 10KCA J X KK560 GQBZ 25EM 1000 X X X 16KZ 0 22GQF 25EM 2200 MTZJ7 5A RD7 5EB1 1 10GJ 2 2KCA 1SS133 25KZ 0 1GQF...

Страница 23: ...23 2 5V 24 2 6V 25 5 2V 26 4 8V 27 1 0V 28 2 6V 29 3 4V 30 2 5V 31 2 7V 32 3 1V 33 3 7V 34 1 6V 35 3 0V 36 1 9V 37 0V 38 1 6V 39 2 7V 40 3 1V 41 1 4V 42 9 2V 43 1 7V 44 1 7V 45 3 5V 46 2 8V 47 2 3V 48 2 3V 49 4 0V 50 4 1V 51 3 1V 52 5 6V IC501 VERT OUT Pin 1 GND 2 14 8V 3 24 8V 4 4 4V 5 4 4V 6 24 4V 7 2 4V IC001 AUDIO AMP Pin 1 6 3V 2 GND 3 6 3V 4 0 7V 5 3 1V 6 5 6V 7 5 5V 8 GND 9 5 7V 10 12 5V IC...

Страница 24: ...NEWSAN S A Una empresa del grupo SANYO Electric Co Sep 01 ...

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