Toshiba 20AF44 Service Manual Download | Manualshive

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H-2

1ms

5.0V

27

20

µ

s

200mV

29

20

µ

s

50V

37

20

µ

s

200mV

28

20

µ

s

50V

38

20

µ

s

50V

39

WAVEFORMS

The following waveforms were measured at the point of the corresponding
balloon number in the schematic diagram.

NOTE:

AV

CRT/SVM

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30
31
32
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34
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Summary of Contents for 20AF44

Page 1: ...SERVICE MANUAL COLOR TELEVISION 20AF44 FILE NO 050 200405 ...

Page 2: ...epairing the high voltage pe ripheral circuit use the designated parts and make sure not modify the circuit Repairing except indicates causes rising of high voltage and it emits an X ray from the cathode ray tube 7 PERFORM A SAFETY CHECK AFTER SERVICING Confirm that the screws parts and wiring which were removed in order to service are put in the original positions or whether there are the portion...

Page 3: ...ORY IC ELECTRICAL ADJUSTMENTS BLOCK DIAGRAM PRINTED CIRCUIT BOARDS MAIN CRT VM COIL SCHEMATIC DIAGRAMS MICON CHROMA DEFLECTION POWER SOUND TUNER STEREO AV COMB FILTER CRT SVM WAVEFORMS MECHANICAL EXPLODED VIEWS MECHANICAL REPLACEMENT PARTS LIST ELECTRICAL REPLACEMENT PARTS LIST A1 1 A1 1 A1 1 A2 1 A3 1 A3 5 B1 1 B2 1 B2 2 C1 1 C1 1 C1 1 D 1 D 5 E 1 E 2 F 1 F 4 F 5 G 1 G 2 G 3 G 4 G 5 G 6 G 7 G 8 G...

Page 4: ...V Tuning System F Synth Input Impedance VHF UHF 75 ohm 2 69 4A A 5 A 1 CH Coverage A I J W W 1 W 84 Intermediate Picture FP 45 75MHz Frequency Sound FS 41 25MHz FP FS 4 50MHz Preset CH No Stereo Dual TV Sound Yes Tuner Sound Muting Yes G 3 Power Power Source AC 120V AC 60Hz DC Power Consumption at AC 105 W at AC 120 V 60 Hz Stand by at AC 3 W at AC 120 V 60 Hz Per Year kWh Year Protector Power Fus...

Page 5: ... On Off Timer Yes Color Stream DVD DTV Yes Control Level Yes Volume Yes Brightness Yes Contrast Yes Color Yes Tint Yes Sharpness Yes Tuning No Bass Yes Treble Yes Balance Yes Back Light No Stereo Audio Output SAP Yes Video Yes Color Stream Yes Channel TV Cable Yes CH Label Yes Game Timer Yes Sleep Timer Yes Sound Mute Yes V chip Rating Yes 16 9 Yes G 8 OSD Language English French Spanish G 9 Clock...

Page 6: ...Yes Volume Up Yes Volume Down Yes TV Caption Text Yes CH1 CH2 Yes TV Video TV AV Yes CH RTN CH ENT Quick View Yes Sleep Yes RE Call Call Yes Reset Yes Menu Enter Yes Mute Yes Exit Yes MTS Audio Select Yes Fav Up Yes Fav Down Yes 16 9 Yes Multi Brand Keys CH Up VCR Yes CH Down VCR Yes Pause Still Yes TV VCR VCR Yes FF Yes Rew Yes Rec Yes Play Yes Stop Yes TV Yes VCR Yes Cable Yes DVD Yes CODE Yes V...

Page 7: ... Timer Max Time 120 Min Yes Energy Star No Favorite CH Yes Surround Yes 16 9 Mode Yes G 12 Accessories Owner s Manual Language English French W Warranty Yes Remote Control Unit Yes Rod Antenna No Poles Terminal Loop Antenna No Terminal U V Mixer No DC Car Cord Center No Guarantee Card No Warning Sheet No Circuit Diagram No Antenna Change Plug No Service Station List No Important Safety Instruction...

Page 8: ...3 S Input Yes Diversity No Ext Speaker No DC Jack 12V Center No VHF UHF Antenna Input F Type AC Outlet No G 14 Set Size Approx W x D x H mm 590 x 484 x 446 5 G 15 Weight Net Approx 23 kg 50 6 lbs Gross Approx 26 5 kg 58 3 lbs G 16 Carton Master Carton No Content Sets Material Dimensions W x D x H mm x x Description of Origin No Gift Box Yes Material Double Brown Dimensions W x D x H mm 695 x 575 x...

Page 9: ...ed Flip up the sides of the Rubber Cap in the direction of the arrow and remove one side of the support Refer to Fig 1 2 2 DISASSEMBLY INSTRUCTIONS GND on the CRT Screwdriver Alligator Clip Support CRT GND on the CRT Rubber Cap CRT Support Fig 1 1 Fig 1 2 3 After one side is removed pull in the opposite direction to remove the other NOTE Take care not to damage the Rubber Cap INSTALLATION 1 Clean ...

Page 10: ...using a blower type IC desoldering machine Refer to Fig 2 2 2 Fig 2 2 NOTE Do not add the rotating and the back and forth directions force on the IC until IC can move back and forth easily after desoldering the IC leads completely When IC starts moving back and forth easily after desoldering completely pickup the corner of the IC using a tweezers and remove the IC by moving with the IC desoldering...

Page 11: ... of leads are repaired the pattern may be damaged So always be sure to replace the IC in this case Finally confirm the soldering status on four sides of the IC using a magnifying glass Confirm that no abnormality is found on the soldering position and installation position of the parts around the IC If some abnormality is found correct by resoldering 5 Solder temporarily Soldering Iron INSTALLATIO...

Page 12: ...e 16 x 16 x hundreds digit value 16 x tens digit value ones digit value C 1 WHEN REPLACING EEPROM MEMORY IC If a service repair is undertaken where it has been required to change the MEMORY IC the following steps should be taken to ensure correct data settings while making reference to TABLE 1 Table 1 1 2 3 4 5 6 7 8 9 10 11 The unit will now have the correct DATA for the new MEMORY IC Enter DATA ...

Page 13: ...the remote control to select CUT OFF Adjust the Screen Volume until a dim raster is obtained 2 3 WHITE BALANCE NOTE Adjust after performing CUT OFF adjustment 1 2 3 4 5 6 7 Place the set with Aging Test for more than 10 minutes Receive the gray scale pattern from the Pattern Generator Using the remote control set the brightness and contrast to normal position Activate the adjustment mode display o...

Page 14: ...RIABLE knob of the oscilloscope until the range between white 100 and 0 is set to 5 scales on the screen of the oscilloscope Press the VOL UP DOWN button on the remote control until the red color level is adjusted to 120 10 of the white level Refer to Fig 2 2 Receive the color bar pattern Audio Video Input Press the TV VIDEO button on the remote control to set to the AV mode Then perform the above...

Page 15: ...lloscope to the Audio Out Jack R ch Press the AUDIO SELECT button on the remote control to set to the stereo mode Activate the adjustment mode display of Fig 1 1 and press the channel button 34 on the remote control to select SEP 1 Press the VOL UP DOWN button on the remote control to adjust it until the R ch output becomes minimum Set the multi sound signal generator L ch Non input R ch 1KHz and ...

Page 16: ...performing adjustments in section 3 1 1 2 3 4 5 Receive the green raster pattern from color bar generator Adjust the pair of purity magnets to center the color on the screen Adjust the pair of purity magnets so the color at the ends are equally wide Move the deflection yoke backward to neck side slowly and stop it at the position when the whole screen is green Confirm red and blue color Adjust the...

Page 17: ...401 J701 J703 J708 SPEAKER CRT FB401 TU001 CP501 AC IN CD501 CRT CP852B CP803 CP804 TP806 TP804 R808 R804 CP852 CP851B CP802B CP801B J801 CRT CRT PCB VM COIL PCB MAIN PCB CD803 CD852 CD801 CD802 CD851 CD1001 ELECTRICAL ADJUSTMENTS 4 ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE WIRING CONNECTION D 5 ...

Page 18: ...UT 2 VIDEO SW C IC IC1503 MM1501XNRE 6 4 6 Vin1 Vin2 V OUT 3 S JACK J702 4 LINE1 REAR J701 6 LINE2 REAR J703 6 FRONT VIDEO J705 2 2 YUV_IN REAR J704 3 5 2 STEREO DECORDER IC IC902 AN5829S 24 14 23 3 6 4 2 AUDIO SW L IC IC702 MM1501XNRE Vin1 Vin2 V OUT FRONT AUDIO L J706 FRONT AUDIO R J707 2 3 2 3 2 6 4 2 AUDIO SW R IC IC701 MM1501XNRE Vin1 Vin2 V OUT 2 3 30 19 TONE DTL IC IC302 AN5891SA E1V 16 20 ...

Page 19: ...09 W062 W133 C701 C702 C728 R710 C711 C707 C708 C1004 C1007 C1009 C1008 IC1001 HS1001 R1009 W803 W136 W137 W130 C1005 W138 W072 W134 W060 C1518 C1510 L1505 L1503 L1502 L1508 C1520 C1501 C1502 L1511 C1528 L1510 C1525 W156 W858 W166 W077 W076 C001_1 L1501 C1532 W146 W145 C642 C605 D602 D601 R603 D603 W162 X602 C630 C627 C622 Q607 W075 W058 W070 W073 W108 W107 W030 C621 W061 W069 C618 W067 W090 C611 ...

Page 20: ...711 R711 R708 R725 R704 R706 R705 R1013 Q1001 R1003 R1011 R1004 R1010 C1010 C1012 Q709 R709 R006 IC1503 IC1502 C1512 C1516 R1529 R1528 R1505 Q1503 C1513 C1517 R1506 R1507 C1519 C1509 C1515 C1504 R1504 C1514 R1503 C1506 C1507 IC1501 C1503 R1502 C1521 C1508 R1508 Q1504 R1509 R1510 C1531 Q1508 R1530 C1505 Q1507 R1516 C1526 R1518 R1519 C1523 C641 R1520 C1533 R632 C136 C137 C138 C632 R618 C631 C624 C61...

Page 21: ...R873 R874 R876 R870 R867 L802 L803 L804 C862_1 C863_1 D858 D857 W006 W004 D854 W009 B853 C858 C859 Q858 Q859 HS851 CP852B S851 S852 C821_1 R814 R813 R810 R815 R809 R811 C804 R817 C806 R821 R819 C805 R812 R862 R863 R865 R864 C857 R858 R861 R860 C855 R854 C856 R859 R856 R853 CP852 W806 R855 D804 D805 W001 D807 D809 W805 W007 CP851B CP802B CP801B D808 W008 W811 W003 C809 D806 R822 W820 R820 C 8 0 8 W...

Page 22: ... MEMORY IC 1 2 3 4 5 6 7 8 X101_1 100CT8R005 8MHz SW101 EVQ21505R CH UP SW103 EVQ21505R VOL UP SW102 EVQ21505R CH DOWN SW104 EVQ21505R VOL DOWN SW105 EVQ21505R POWER D109 SLR 342VCT32 POWER ON CP101 173979 7 1 2 3 4 5 6 7 TM101 R25 1943 BT001 R03 AB E_2P_G BT002 R03 AB E_2P_G Vout B GND OS101 RPM7138 WH5 1 2 3 IC101 OEC7090A MICON IC 1 10 11 12 13 14 15 16 17 18 19 2 20 21 22 23 24 25 26 27 28 29 ...

Page 23: ...22 47 16V YK C611 1 50V KA C642 1 50V KA C603 47 16V YK C645 100 16V YK C602 47 16V YK D601 1SS133 D608 11E1 EIC D605 1SS133 D606 1SS133 D607 1SS133 Q603 KTC3875S_Y_RTK 6dB AMP Q610 KTC3875S_Y_RTK SVM Q607 KTC3203_Y AT 5V REG Q606 KTC3209_Y P CON 5V REG Q605 KTC3875S_Y_RTK 6dB AMP Q611 KTC3209_Y P CON 8V REG Q602 KTC3209_Y P CON 5V REG Q604 KTC3209_Y P CON 5V REG Q601 KTC3209_Y P CON 8V REG Q613 K...

Page 24: ... NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST NOTE THE DC VOLTAGE AT EACH PART WAS MEASURED R437 1 1 2W R409_1 1K R443 150K 1 2W R420 2 7 1 2W R417 39K R415 820 R430 82K 1 2W R427 680 1 2W R418 560 1 2W R406 470 1 2W R401 4 7K R407 1 2K R428 100 1 4W R453 10K R432 8 2K 1 2W R429 1K...

Page 25: ...L WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST NOTE THE DC VOLTAGE AT EACH PART WAS MEASURED R535 3 9K 1 4W R510 100 1 4W R520 1 5M 1 2W R500 2 7M 1 2W 10 R553 6 8K 1 2W R540 1 2M 1 4W R539 1 2M 1 4W R516 10K R543 1K 1 4W R508 100 1 4W R512 1K 1 2W R511 22K R545 150 1 4W R533 270 R554 100K 1 2W R506 6 8K 1 4W R513 10K R505 10K 1 4W R507 82K 1 4W R547 100 1 4W R536 47K 1 4W R525 15K R524 3 3K 1...

Page 26: ...K 1 4W R1002 270 1 2W R1001 270 1 2W R1009 68K 1 4W R314 220K R311 10K R1011 10K R1004 22K R1003 22K R1013 10K R303 100 1 4W R304 100 1 4W R1010 10K R302 2 7K 1 4W R301 2 7K 1 4W C320 56P CH C322 56P CH C326 0 033 B C324 0 0033 B C323 0 0033 B C325 0 033 B C301 0 033 B C312 0 01 B C1005 220P B C334 1 B C311 0 1 B C315 0 1 B C303 0 01 B C310 0 033 B C313 0 01 B C307 0 015 B C309 0 039 B C1012 0 004...

Page 27: ...2 330 R006 100 R001 68K 1 2W R002 68K 1 2W R904 220 1 4W R905 56K 1 4W C912 0 022 B C908 0 022 B C911 0 047 B C913 0 1 B C917 0 1 B C915 0 1 B C918 0 1 B C005 0 1 F C002 0 1 B W820 W819 W829 W830 W812 D001 MTZJ33B C902 1 50V KA C901 1 50V KA C919 10 50V YK TUNER 5V TUNER_VIDEO P CON 8V B P CON 5V P CON B GND AFT SCL SDA J_AUDIO_OUT_L J_AUDIO_OUT_R SW_AUDIO_L SW_AUDIO_R J_AUDIO_OUT_L J_AUDIO_OUT_R ...

Page 28: ...SURED R701 22 1 4W R703 2 2K R702 22 1 4W R729 75 R726 1K R733 1K R727 75 R734 1K R728 1K R739 75 R705 3 3K R706 3 3K R709 270 R725 75 R736 75 R730 75 R708 1K R724 75 R711 1K R710 1K 1 4W R704 1K R735 75 R721 68 R745 1K R746 1K C736 0 0056 B C738 0 0056 B C725 1 B C722 1 B C735 0 0056 B C737 0 0056 B C727 1 B C724 1 B C734 0 1 B C706 0 1 F C741 0 0056 B C742 0 0056 B C719 1 B C720 1 B D703 MTZJ12B...

Page 29: ...21 0 1 B C1509 0 01 B C1513 0 1 B C1517 100P CH C1519 0 1 B C1531 0 01 B C1504 0 1 B C1505 1 B C1508 0 1 B C1515 0 1 B C1514 0 1 B C1516 0 1 B C1512 0 1 B C1506 0 1 B C1507 0 1 B C1503 0 1 B C1526 0 01 B C1533 22P CH C1523 0 1 F W804 W848 C1510 100 6 3V YK C1528 100 16V YK C1501 100 6 3V YK C1502 100 6 3V YK C1518 1 50V KA C1520 100 6 3V YK C1525 100 6 3V YK C1530 47 16V YK C1535 10 16V KA Q1508 K...

Page 30: ...R865 56K 1 4W R870 1 5K 1 4W R877 68 1 2W R867 10 1 2W R879 2 7 1 2W R880 2 7 1 2W R828 2 7K 1 4W R829 2 7K 1 4W R813 220 1 4W R814 220 1 4W R809 100 1 4W R811 2 2K 1 4W R812 2 2K 1 4W R815 220 1 4W R819 330 1 4W R818 220 1 4W R817 330 1 4W R810 2 2K 1 4W C821_1 100P CH C806 680P CH C805 390P CH C861 0 0047 500V B C859 100P CH C856 0 01 B C855 560P CH C857 0 001 B C858 100P CH C860 0 0047 500V B C...

Page 31: ...5µs 1 0V 5ms 200mV 5ms 5 0V 5ms 10V 22 1ms 50mV 1ms 200mV 23 1ms 100mV 24 1ms 100mV 25 4 50µs 1 0V 20µs 50V 19 20µs 2 0V 20 21 20µs 200V The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram NOTE DEFLECTION SOUND ...

Page 32: ...5 0V 27 20µs 200mV 29 20µs 50V 37 20µs 200mV 28 20µs 50V 38 20µs 50V 39 WAVEFORMS The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram NOTE AV CRT SVM ...

Page 33: ...7 207 206 206 205 207 113 PCB010 MAIN PCB ASS Y 205 101A 101B 101D 106 101 115 114 112 203 111 108 203 111 202 202 112 101C 101E 101G 101F 204 101G 101H 101I 101I 203 111 108 203 111 202 202 112 112 201 201 201 201 103 105 PCB060 VM COIL PCB ASS Y PCB110 CRT PCB ASS Y 206 109 109 110 110 ...

Page 34: ...MECHANICAL EXPLODED VIEW PACKING DIAGRAM I 2 122 123 124 125 TM101 120 118 119 117 116 118 119 ...

Page 35: ...2WPA0011 HOLDER CRT WIRE 110 AE001107 800WR0A026 SHEET CRT SUPPORT D 111 AD300518 801WR00001 DAMPER SPEAKER 112 AD300519 82A40B0104 FLAT WASHER 113 BZ710260 899HV3T000 HOLDER ANODE WIRE 114 AE000007 7220001107 SHEET HWC 115 AE000006 7220001119 SHEET CSA WARNING 116 AE003204 723000C491 SHEET BAR CODE 117 AE000010 791WHA0085 LAMIFILM BAG 118 AD302017 792WHA0432 PACKAGE TOP 119 AD302018 792WHA0433 PA...

Page 36: ... BZ110182 C03L0R713K CC 0 001 UF 2KV R C426 AD300061 E5EZFD220M CE 22 UF 250V C430 BZ110195 E02LU8220M CE 22 UF 100V C501 BZ110053 E02LF3102M CE 1000 UF 25V C502 BZ110182 C03L0R713K CC 0 001 UF 2KV R C503 BZ110182 C03L0R713K CC 0 001 UF 2KV R C504 AD301729 E02LU52R2M CE 2 2 UF 50V C505 BZ110025 P2122B224M CMP 0 22 UF 275V ECQUL C506 BZ110035 P2122B104M CMP 0 1 UF 275V ECQUL C507 BZ110012 E51CGC471...

Page 37: ... EIC D701 AD300070 D97U01201B DIODE ZENER MTZJ12B T 77 D702 AD300070 D97U01201B DIODE ZENER MTZJ12B T 77 D703 AD300070 D97U01201B DIODE ZENER MTZJ12B T 77 D704 AD300070 D97U01201B DIODE ZENER MTZJ12B T 77 D705 AD300070 D97U01201B DIODE ZENER MTZJ12B T 77 D706 AD300070 D97U01201B DIODE ZENER MTZJ12B T 77 D709 BZ410066 D97U06R21B DIODE ZENER MTZJ6 2B T 77 D801 BZ410006 D1VT001330 DIODE SILICON 1SS13...

Page 38: ...199Y TRANSISTOR SILICON KTC3199_Y AT Q811 AD301032 TCATC3199Y TRANSISTOR SILICON KTC3199_Y AT Q812 AD301032 TCATC3199Y TRANSISTOR SILICON KTC3199_Y AT Q852 BZ510069 TCATC31980 TRANSISTOR SILICON KTC3198 AT Y GR Q853 AD300024 TCUT00752Y TRANSISTOR SILICON 2SC752 G TM _Y Q854 BZ510069 TCATC31980 TRANSISTOR SILICON KTC3198 AT Y GR Q855 BZ510069 TCATC31980 TRANSISTOR SILICON KTC3198 AT Y GR Q856 BZ510...

Page 39: ...D801 AD301042 06CU253401 CORD CONNECTOR CU253401 CD802 AD301994 06CU274201 CORD CONNECTOR CU274201 CD803 AD300094 06CP83035A CORD CONNECTOR CP83035A CD851 AD301995 06CU244201 CORD CONNECTOR CU244201 CD852 AD301043 06CU232001 CORD CONNECTOR CU232001 CP101 BZ614102 0694270139 CONNECTOR PCB SIDE 173979 7 CP401 AD300095 069X460029 CONNECTOR PCB SIDE B06B DVS CP501 BZ614176 069S320419 CONNECTOR PCB SID...

Page 40: ...D302002 100CT8R005 CRYSTAL HC 49 U S X602 AD302003 100CT3R505 CRYSTAL HC 49 C RESISTOR RC CARBON RESISTOR CAPACITORS CC CERAMIC CAPACITOR CE ALUMI ELECTROLYTIC CAPACITOR CP POLYESTER CAPACITOR CPP POLYPROPYLENE CAPACITOR CPL PLASTIC CAPACITOR CMP METAL POLYESTER CAPACITOR CMPL METAL PLASTIC CAPACITOR CMPP METAL POLYPROPYLENE CAPACITOR J2 5 ...

Page 41: ...TOSHIBA CORPORATION 1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN ...

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