Toshiba 20AF41C Service Manual Download

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TOSHIBA

FILE NO.050-200102

SERVICE MANUAL

COLOR TELEVISION

20AF41C

DOCUMENT CREATED IN JAPAN, DEC., 2001

Summary of Contents for 20AF41C

Page 1: ...TOSHIBA FILE NO 050 200102 SERVICE MANUAL COLOR TELEVISION 20AF41C DOCUMENT CREATED IN JAPAN DEC 2001 ...

Page 2: ...ant parts for safety which is indicated in the circuit diagram or the table of parts as a mark the designated parts must be used 4 PUT PARTS AND WIRES IN THE ORIGINAL POSITION AFTER ASSEMBLING OR WIRING There are parts which use the insulation material such as a tube or tape for safety or which are assembled in the condition that these do not contact with the printed board The inside wiring is des...

Page 3: ... 5 A 1 A I J W W 1 W 84 Tuning System Frequency syn Voltage syn Others G 8 Preset Channel channels G 9 Intermediate Frequency Picture fP 45 75 MHz MHz MHz Sound fS 41 25 MHz MHz MHz fP fS 4 50 MHz MHz MHz G 10 Stereo Dual TV Sound Yes NICAM GERMAN USA JAPAN No G 11 Tuner Sound Muting Yes No G 12 Power Source 120 V AC 50Hz AC 60Hz G 13 Power Consumption 105 W at AC 120 V 60 Hz W at DC V Stand by 4 ...

Page 4: ...Input Rear1 RCA ø8 3x1 Video Input Rear2 RCA ø8 3x1 Video Output Rear RCA ø8 3x1 Audio Input Front RCA ø8 3x2 Audio Input Rear1 RCA ø8 3x2 Audio Input Rear2 RCA ø8 3x2 Audio Output Rear RCA ø8 3x2 21 Pin x DC Jack Center Ear Phone Jack ø3 5 Head Phone Jack ø3 5 AC Outlet Ext Speaker Diversity S Input Front S Input Rear Color Streem RCA ø8 3x3 G 24 Indicator Power Stand By On Timer NONE RED G 25 Di...

Page 5: ...ons 658 mm W 575 mm D 529 mm H Design As Per BUYER s Description of Origin Yes No Drop Test Natural Dropping At 1 Corner 3 Edges 6 Surfaces Height 25cm 31cm 46cm 62cm 80cm Container Stuffing 288 Sets 40 container G 30 Accessories Owner s Manual W Warranty English French Channel Film AC Plug Adapter Remote Control Unit Battery UM 4 x 2 Safety Tip Toll Free Insert Sheet Guarantee Card Audio Video Co...

Page 6: ...e Down Main Power SW Sub Power Rear AC DC TV CATV Selector Degauss Main Power SW G 33 Magnetic Field BV 0 45G BV 0 35G BV 0 25G BH 0 18G BH 0 30G BH 0 30G BV 0 15G BV 0 25G BV 0 50G BH 0 15G BH 0 15G BH 0 30G G 34 Remote Control Unit RC DU Glow in Dark Remocon Yes No Power Source D C 3 V Battery UM 4 x 2 Total 42 Key Power 0 Muting TV Video TV AV 1 TV Caption Text Volume Up 2 CH1 CH2 Volume Down 3...

Page 7: ... 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 th...

Page 8: ...r FIG 1 Initial setting content of MEMORY IC POWER ON total hours 16 x 16 x 16 x thousands digit value 16 x 16 x hundreds digit value 16 x tens digit value ones digit value NOTE FOR THE REPLACING OF 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 Tabl...

Page 9: ...ceive a 70dB monoscope pattern Connect the digital voltmeter between the TP001 and the GND Activate the adjustment mode display of Fig 1 1 and press the channel button 02 on the remote control to select RF AGC Press the VOL UP DOWN button on the remote control until the digital voltmeter is 1 95 0 05V 2 3 CUT OFF 1 2 3 4 Adjust the unit to the following settings G DRIVE 64 B DRIVE 64 R BIAS 32 G B...

Page 10: ... on the remote control until the right and left vertical lines are straight 2 11 TRAPEZIUM 1 2 3 4 Receive the crosshatch signal from the Pattern Generator Using the remote control set the brightness and contrast to normal position Activate the adjustment mode display of Fig 1 1 and press the channel button 24 on the remote control to select TRAPEZIU Press the VOL UP DOWN button on the remote cont...

Page 11: ...Video Input Press the TV VIDEO button on the remote control to set to the AV mode Then perform the above adjustments 2 7 Receive the color bar pattern Audio Video Input Press the TV VIDEO button on the remote control to set to the CS mode Then perform the above adjustments 2 6 Press the VOL UP DOWN button on the remote control until the red color level is adjusted to 140 of the white level Refer t...

Page 12: ...between the deflection yoke and CRT funnel to fix the deflection yoke Refer to Fig 3 2 b R G B R G B Fig 3 2 a WEDGE WEDGE WEDGE WEDGE POSITION Fig 3 2 b R G B R G B Receive the crosshatch pattern from the color bar generator Combine red and blue of the 3 color crosshatch pattern on the center of the screen by adjusting the pair of 4 pole magnets Combine red blue magenta and green by adjusting the...

Page 13: ...MAJOR COMPONENTS LOCATION GUIDE FOCUS VOLUME SCREEN VOLUME FB401 MAIN PCB TP001 J702 J701 J703 J704 J705 TP002 T501 VR502 CRT PCB J801 TP806 TP804 TP901 TU001 ...

Page 14: ...PHONE JACK COMB FILTER IC901 TC90A53F 180V 25V VIDEO3 LINE2 YUV IN Y S INPUT IF 11 SCL 4 SDA 5 39 37 SCL SDA SCL 24 SDA 25 18 19 18 17 12 7 2 5 14 7 20 1 14 7 19 2 24 23 21 22 30 32 31 25 22 20 27 29 9 6 3 5 2 4 1 7 14 15 13 8 10 C Y C L R V 4 1 15 13 3 5 T501 23 25 5 34 28 16 15 14 42 47 55 38 31 8 6 11 51 14 4 6 3 HV 1 7 9 F 10 S 1 5 6 7 R G B DY 7 F 10 L R V L R V V OUT FBP IN H OUT ABCL B OUT ...

Page 15: ...116 W125 W124 W040 W041 W042 W039 W115 W036 W072 W070 W071 D603 W059 W134 W133 W068 W099 D604 D602 W069 W121 W064 D614 D613 D611 W098 W090 W117 W835 L701 W055 W054 C740 C738 R778 W801 IC303 C326 C351 IC101 D107 D104 R107 IC199 W108 IC103 L101 D103 C111 R131 R128 C122 X101 C119 C118 C123 R326 C310 C312 C314 C313 R335 C311 R330 R109 C783 R357 R358 CP351 C724 C725 W137 W106 W078 C929 C921 C925 C919 C...

Page 16: ... R209 C206 C202 R202 C221 R219 R220 R218 Q204 R217 C638 C001 R138 C720 R633 C380 C384 C008 IC301 R322 C331 C332 R324 C334 R321 R319 C330 C333 C335 R325 C325 R320 R323 C336 C337 R136 R124 R119 R110 R108 C108 C109 C101 R133 R134 C114 C113 R121 R123 Q102 R130 R132 Q101 R117 R129 R127 R118 R114 R116 R101 R126 R104 R115 R112 R113 C107 R102 C121 R106 C128 R103 R328 R301 C306 R303 C308 C339 R327 C338 R30...

Page 17: ...51 C853 C852 C851 R857 C860 C861 D852 J 8 0 1 R872 D855 R869 R875 R871 D856 R866 D853 R868 R873 R874 R876 R870 R867 C 8 0 8 C815 L802 L803 L804 C862 C863 C866 IC851 D858 D857 W011 W012 W013 D854 W014 B853 W803 W801 CP801 CP802 CP851 C858 C859 Q858 Q859 CP852B S851 S852 CP852_1 C822 C868 C823 W813 W814 W815 W802 C821 W804 C903 L902 L913 C909 C908 C941 C947 L912 L911 L904 L909 L906 C962 L910 C949 L9...

Page 18: ...954 R946 R945 R947 R954 R960 Q901 R959 Q905 R919 R953 Q906 R939 R940 C950 C952 C960 R944 R943 R948 R951 Q907 R949 C955 R952 R955 Q911 R962 R964 R963 C957 C958 R965 R941 Q910 C942 R936 R956 Q909 R958 Q912 PRINTED CIRCUIT BOARDS COMB FILTER CHIP MOUNTED PARTS SOLDER SIDE CRT CHIP MOUNTED PARTS SOLDER SIDE R813 R810 C804 R817 R814 R812 C805 R819 R815 R811 C806 R821 R809 R852 R856 R853 R860 C855 R861 ...

Page 19: ...15 16 17 18 19 2 20 21 22 23 24 25 26 27 28 29 3 30 31 32 33 34 35 36 37 38 39 4 40 41 42 43 44 45 46 47 48 49 5 50 51 52 6 7 8 9 TU001 NJH3022U268 1 10 11 12 13 14 15 2 3 4 5 6 7 8 9 GND B Vout OS101 PIC 23143SY2 1 2 3 IC103 PST600C RESET 1 2 3 SW102 SKHVBED010 CH DOWN SW104 SKHVBED010 VOL DOWN SW105 SKHVBED010 POWER SW101 SKHVBED010 CH UP SW103 SKHVBED010 VOL UP IC199 S 24C08ADPA 01 MEMORY 1 2 3...

Page 20: ... B C634 0 22 B C607 0 01 B C633 0 1 B C202 0 01 B C611 0 47 TF C627 8P CH C602 0 1 B C959 0 1 B C965 0 1 B C932 0 1 B C930 0 1 B W849 W848 W816 W820 W847 W839 W844 W840 W830 W842 D604 MTZJ6 2B D603 MTZJ6 2B D602 MTZJ6 2B D612 MTZJ6 2B D201 MTZJ12B C203 100 16V YK C640 1000 16V YK C935 4 7 50V KA C214 10 16V KA C211 0 22 50V KA C213 100 10V YK C615 100 10V YK C616 47 16V KA C216 10 16V KA C604 1 50...

Page 21: ...TTENTION R428 100 1 4W R430 68K 1 2W R432 8 2K 1 2W R437 1 1 2W R421 680 1 2W R429 680 1 2W R425 680 1 2W R403 330 R417 33K R442 1 8K R435 2 7K R419 1K R407 5 6K 1 4W R406 4 7K 1 2W R408 4 7K 1 4W R409 1K R415 820 R412 8 2K R404 220 1 2W R401 1K R402 100K R405 5 6K R443 68K 1 2W C439 0 001 B C420_1 0 012 1 6KV ECWH C423 0 0022 1 6KV ECWH C424 0 018 630V PP C421 0 015 630V PP C419 0 001 500V B C415...

Page 22: ...4 680 R524 2 2K R510 1K R532 3 3K R533 1 8K R508 2 7K 1 4W R554 22K 1 2W R503 3 3K 1 4W R500 2 7M 1 2W 10 R525 10K R529 5 6K 1 4W R528 120K 1 4W R506 2 2K 1 4W R509 100K 1 2W R553 22K 1 2W R520 390 1 4W R511 22K R523 10K 1 4W R515 10K 1 4W R502 27 1 2W C536 0 001 2KV YR C516 0 001 500V B C524 0 0015 B C535_1 0 0022 2KV YR C502 0 001 2KV B C503 0 001 2KV B C554 0 0022 B C509 0 0056 B C506 0 1 250V ...

Page 23: ...K R301 20K R303 20K R324 1 8K R327 100K R323 4 7K R328 100 R326 100 1 4W R320 6 8K C339 0 1 B C336 100P CH C337 100P CH C352_1 1 B C353_1 1 B C365_1 1 B C363_1 1 B C384 0 01 B C380 0 01 B C330 0 022 B C333 0 47 B C331 0 022 B C332 0 47 B C309 0 033 B C307 0 0033 B C306 0 0033 B C308 0 033 B C334 0 033 B C335 0 033 B C338 0 001 B C325 0 1 B W835 C366 2 2 50V KA C355 22 16V KA C305 2 2 50V NA C303 4...

Page 24: ...R715 1K R740 3 9K R756 470 R734 3 9K R757 470 R723 470 R781 1 2K R721 1K R701 220 R730 220K R705 82 1 4W R707 82 1 4W R726 270 R786 100 1 4W R736 1K R738 220K R722 1 5K R739 3 9K R743 82 1 4W C722 1 B C717 33P CH C703 0 0056 B C726 0 0056 B C708 0 0056 B C727 0 0056 B C720 33P CH C750 1 B C748 0 1 B C731 0 01 B C706 8P CH C734 0 01 B C793 33P CH C742 0 0056 B C746 0 0056 B C723 56P CH W802 W810 D7...

Page 25: ...412K BUFFER Q907 2SC2412K AMP Q911 2SC2412K BUFFER Q906 2SC2412K BUFFER Q908 2SC2412K BUFFER Q901 2SC2412K AMP Q905 2SC2412K BUFFER Q909 2SA1037AK AMP Q912 2SA1037AK BUFFER Q903 2SA1037AK BUFFER Q904 2SA1037AK BUFFER Q910 2SA1037AK AMP CP902 6035B 03Z002 T 1 2 3 OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE NOTE THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME THE DC VOLTAGE AT EACH PART WAS ME...

Page 26: ... B C822 220P B C851 0 0082 M C857 0 001 B C861 0 0047 500V B C859 100P CH C860 0 0047 500V B C867 0 1 B C865 150P 500V B C815 330P B C813 0 0022 M W801 W813 W802 W804 W815 W814 W803 C809 2 2 250V YK C853 47 16V YK C852 47 16V YK Q801 2SC2621 RED AMP Q810 2SC1740SP RED AMP Q811 2SC1740SP GREEN AMP Q803 2SC2621 BLUE AMP Q812 2SC1740SP BLUE AMP Q802 2SC2621 GREEN AMP Q852 2SC1815Y AMP Q853 2SC752 G T...

Page 27: ...1V 50µs div 8 0 5V 10ms div 7 1V 20µs div 6 1V 20µs div MICON TUNER The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram NOTE CHROMA IF 11 0 5V 20µs div 10 2V 20µs div 13 1V 20µs div 12 1V 2µs div 14 2V 20µs div 15 2V 20µs div ...

Page 28: ...oon number in the schematic diagram NOTE 16 2V 5ms div 17 20V 5ms div 18 10V 10ms div 19 20V 20µs div 20 2V 20µs div 26 5V 2ms div 28 200mV 20µs div 27 5V 2ms div 29 200mV 20µs div 30 2V 20µs div SOUND AV 21 200V 50µs div 23 2V 5ms div 22 2V 5ms div 24 2V 5ms div 25 2V 5ms div DEFLECTION ...

Page 29: ...measured at the point of the corresponding balloon number in the schematic diagram NOTE 31 1V 50µs div 32 2V 5ms div 33 2V 5ms div 34 0 5V 20µs div COMB FILTER 35 1V 20µs div 36 1V 5ms div 38 50V 20µs div 37 50V 20µs div 39 50V 20µs div CRT ...

Page 30: ... 122 122 122 205 SP351 127 127 126 126 101 108 110 109 111 113 112 107 205 SP352 127 127 126 126 202 MECHANICAL EXPLODED VIEW 201 201 201 201 201 201 114 201 202 123 125 115 116 116 102 103 104 105 106 124 203 204 204 204 204 203 203 203 PCB330 COMB PCB 120 PCB010 MAIN PCB TU001 FB401 ...

Page 31: ...10259 762WPA0011 HOLDER CRT WIRE 120 BZ710260 899HV3T000 HOLDER ANODE WIRE 121 AD300446 7230007251 FILM DECORATION 122 AD300135 769WSA0011 WASHER CRT T 0 5 123 AD300136 A3I707Q740 CABINET BACK ASSY 124 BZ710039 8995034000 CORD CLIP UL CO 125 AD300447 7260000333 SHEET CRT 126 AD300448 801JRO0002 DAMPER MD 127 AD300449 82A2638804 SPACER M2 6x3 8xT8 201 BZ710035 8117540A64 SCREW TAPPING B0 TRUSS 4x16...

Page 32: ...P414F9123H CMPP 0 012 UF 1 6KV ECWH C421 AD300049 P3N1F5153J CPP 0 015 UF 630V C422 AD300047 P411F4224F CMPP 0 22 UF 400V ECWF C423 AD300045 P414F9222H CMPP 0 0022UF 1 6KV ECWH C424 AD300048 P3N1F5183J CPP 0 018 UF 630V C425 AD300077 C0JLYR713K CC 0 001 UF 2KV YR C426 AD300061 E5EZFD220M CE 22 UF 250V C428 BZ110041 E02LT3471M CE 470 UF 25V C430 AD300064 E02LT8220M CE 22 UF 100V C501 AD300066 E02LF...

Page 33: ...10043 D2WT011E10 DIODE SILICON 11E1 EIC D611 BZ410006 D1VT001330 DIODE SILICON 1SS133T 77 D612 BZ410066 D97U06R21B DIODE ZENER MTZJ6 2B T 77 D613 BZ410006 D1VT001330 DIODE SILICON 1SS133T 77 D614 BZ410006 D1VT001330 DIODE SILICON 1SS133T 77 D711 BZ410066 D97U06R21B DIODE ZENER MTZJ6 2B T 77 D801 BZ410006 D1VT001330 DIODE SILICON 1SS133T 77 D802 BZ410006 D1VT001330 DIODE SILICON 1SS133T 77 D803 BZ4...

Page 34: ... TPE2 Q856 BZ510012 TC5T018154 TRANSISTOR SILICON 2SC1815Y TPE2 Q857 BZ510034 TA5T010154 TRANSISTOR SILICON 2SA1015Y TPE2 Q858 AD300029 TAU0018370 TRANSISTOR SILICON 2SA1837 Q859 AD300025 TCU0047930 TRANSISTOR SILICON 2SC4793 Q901 BZ510002 T8YJ2412K0 TRANSISTOR SILICON 2SC2412KT146 R S Q903 BZ510001 T6YJ1037K0 TRANSISTOR SILICON 2SA1037AKT146R S Q904 BZ510001 T6YJ1037K0 TRANSISTOR SILICON 2SA1037A...

Page 35: ...2E075701 CORD JUMPER 2E075701 CD803 AD300094 06CP83035A CORD CONNECTOR CP83035A CD851 AD300129 122E053701 CORD JUMPER 2E053701 CD852 AD300086 122E032001 CORD JUMPER 2E032001 CF201 BZ613015 1011T4R504 FILTER CERAMIC EFCT4R5YS5A CF202 AD300087 1022T45R71 FILTER SAW SAF45MFX220ZR CF203 BZ613016 1011T4R517 FILTER CERAMIC EFCT4R5MW5 CP101 BZ614135 0694260139 CONNECTOR PCB SIDE 173979 6 CP351 AD300097 0...

Page 36: ...3022U268 V801 AD300089 098W200487 CRT W DY A51LSH196X07 O X101 AD300088 1002T00802 CERAMIC OSCILLATOR CSTS0800MG03 T2 X601 BZ613004 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 POLYPR...

Page 37: ...TOSHIBA CORPORATION 1 1 SHIBAURA 1 CHOME MINATO KU TOKYO 105 8001 JAPAN ...

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