Toshiba 24AF42 Service Manual
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Toshiba 24AF42 Service Manual

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FILE NO. 050-200203

SERVICE MANUAL

COLOR TELEVISION
24AF42
DOCUMENT CREATED IN JAPAN, Mar., 2002

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Summary of Contents for Toshiba 24AF42

  • Page 1: Service Manual

    FILE NO. 050-200203 SERVICE MANUAL COLOR TELEVISION 24AF42 DOCUMENT CREATED IN JAPAN, Mar., 2002...

  • Page 2: Servicing Notices On Checking

    SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES 6. AVOID AN X-RAY As for the places which need special attentions, Safety is secured against an X-ray by consider- they are indicated with the labels or seals on the ing about the cathode-ray tube and the high cabinet, chassis and parts.

  • Page 3: General Specifications

    GENERAL SPECIFICATIONS CRT Size / Visual Size 24 inch / 600mmV System CRT Type Flat Deflection degree Magnetic Field BV/BH +0.45G/0.18G Color System NTSC Speaker 2 Speaker Position Front Side Size 2 x 4.7 Inch Impedance Sound Output 5.0+5.0 W 10%(Typical) 4.0+4.0 W NTSC3.58+4.43 /PAL60Hz...
  • Page 4 GENERAL SPECIFICATIONS On Screen Menu Display Menu Type Icon Picture Contrast Brightness Color Tint Sharpness Sound Bass Treble Balance BBE On/Off Stable Sound On/Off Set Up TV/CATV Auto CH Memory Add/ Delete Option Language CH Label Favorite CH V-Chip Lock Color Stream DVD/DTV Control Level Volume...
  • Page 5 GENERAL SPECIFICATIONS G-10 Remote Unit RC-DU Control Glow in Dark Remocon Format Toshiba Custom Code TV:40-BFh Power Source Voltage(D.C) UM size x pcs UM-4 x 2 pcs Total Keys Keys Keys Power CH Up/+ CH Down/- Volume Up/+ Volume Down/- C.C.(TV/Caption/Text)
  • Page 6 GENERAL SPECIFICATIONS G-12 Accessories Owner's Manual Language English / French W/ Warranty Remote Control Unit Rod Antenna Poles Terminal Loop Antenna Terminal U/V Mixer DC Car Cord (Center+) Guarantee Card Warning Sheet Circuit Diagram Antenna Change Plug Service Station List Important Safety Instruction Dew/AHC Caution Sheet AC Plug Adapter...

  • Page 7: Removal Of Anode Cap

    DISASSEMBLY INSTRUCTIONS 3. After one side is removed, pull in the opposite direction to 1. REMOVAL OF ANODE CAP remove the other. Read the following NOTED items before starting work. NOTE After turning the power off there might still be a potential Take care not to damage the Rubber Cap.

  • Page 8: Removal And Installation Of Flat Package Ic

    DISASSEMBLY INSTRUCTIONS REMOVAL AND INSTALLATION OF When IC starts moving back and forth easily after desoldering completely, pickup the corner of the IC using FLAT PACKAGE IC a tweezers and remove the IC by moving with the IC desoldering machine. (Refer to Fig. 2-3.) REMOVAL NOTE Put the Masking Tape (cotton tape) around the Flat...
  • Page 9 DISASSEMBLY INSTRUCTIONS INSTALLATION When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thin- Take care of the polarity of new IC and then install the tip Soldering Iron. (Refer to Fig. 2-8.) new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily.

  • Page 10: Service Mode List

    SERVICE MODE LIST This unit provided with the following SERVICE MODES so you can repair, examine and adjust easily. To enter the Service Mode, press both set key and remote control key for more than 1 second. Set Key Remocon Key Operations VOL.

  • Page 11: Adjustment Procedure

    ELECTRICAL ADJUSTMENTS 1. ADJUSTMENT PROCEDURE 2. BASIC ADJUSTMENTS Read and perform these adjustments when repairing the 2-1: CONSTANT VOLTAGE circuits or replacing electrical parts or PCB assemblies. Set condition is AV MODE without signal. CAUTION Connect the digital voltmeter to the TP002. Adjust the VR502 until the DC voltage is 115 ±...
  • Page 12 ELECTRICAL ADJUSTMENTS 2-7: HORIZONTAL SIZE 2-12: TINT/COLOR CENT Receive the monoscope pattern. Receive the color bar pattern. (RF Input) Using the remote control, set the brightness and contrast Connect the oscilloscope to TP806. to normal position. Using the remote control, set the brightness, contrast, Activate the adjustment mode display of Fig.
  • Page 13 ELECTRICAL ADJUSTMENTS 2-13: CONTRAST MAX MANUAL 2-16: OSD HORIZONTAL Activate the adjustment mode display of Fig. 1-1 and Activate the adjustment mode display of Fig. 1-1. press the channel button (18) on the remote control to Press the VOL. UP/DOWN button on the remote control select “CONT.

  • Page 14: Purity And Convergence Adjustments

    ELECTRICAL ADJUSTMENTS 3-3: STATIC CONVERGENCE 3. PURITY AND CONVERGENCE ADJUSTMENTS NOTE Adjust after performing adjustments in section 3-2. NOTE Receive the crosshatch pattern from the color bar Turn the unit on and let it warm up for at least 30 generator.

  • Page 15: Electrical Adjustment Parts Location Guide (Wiring Connection)

    ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CP852B CRT PCB VM COIL PCB CP804 CD803 CP803 J801 CP801_1 CP851_1 CD801 CP801A CP101 CD701A CP851A FB401 CP401 T501 CD701B SPEAKER L503 CP502 VR502 R527 TP002 CP501 CD501 AC IN CP1001 MAIN PCB...

  • Page 16: Block Diagram

    BLOCK DIAGRAM SPEAKER SPEAKER SP1001 SP1002 TU001 MEMORY IC IC198 MICON HEAD S-24C16AFJA-TB-01 IC101 OEC7074A PHONE JACK J1001 SOUND AMP IC1001 AN5276 YUV IN CHROMA IC IC201 TB1253N 24 25 43 44 IC301 NJM2150AM 18 19 V OUT SOUND DECORDER IC902 AN5829S 21 22...
  • Page 17 PRINTED CIRCUIT BOARDS MAIN (INSERTED PARTS) SOLDER SIDE CP801A W006 W826 D411 J702 Q410 CP101 D407 J704 J701 J703 J708 CD701A L703 W158 C427 W801 HS401 CP851A R734 D409 W861 C442 W065 W064 W063 C418 L403 C004 CP401 IC701 W096 L701 D605 C412_1...
  • Page 18 PRINTED CIRCUIT BOARDS MAIN (CHIP MOUNTED PARTS) SOLDER SIDE Q705 R737 IC198 R104 R731 Q704 R510 Q1503 R1507 R1506 C336 C554 R155 R319 R1504 C334 R532 Q509 C928 R324 R111 C1514 C330 C926 C333 R303 R146 R327 IC1501 C306 R905 R140 IC101 R904...

  • Page 19: Solder Side

    PRINTED CIRCUIT BOARDS CRT/VM COIL SOLDER SIDE TP806 R808 W804 D804 R801 Q810 TP804 R804 D805 W006 R806 TP805 R809 R812 R802 Q853 Q812 Q811 C805 Q851 R819 R814 Q852 Q854 IC851 R859 C857 D855 R872 R877 W802 Q857 CP803 D854 R866 R876...
  • Page 20 MICON/TUNER SCHEMATIC DIAGRAM (MAIN PCB) OS101 RPM7138-H5 ACCESORY TU001 ENV56DB6G3 TEST POINT CP101 BT001 173979-7 R03(AB)E_20_T R003 I2C_SCL TM101 330K I2C_SDA BT002 R111 SBKMOP006B R03(AB)E_20_T I2C_OFF H-BUFFER Q102 2SC2412K C003 RED LED V-BUFFER Q101 POWER ON 2SC2412K D109 SLR-342VCT32 MICON IC IC101 OEC7074A FROM/TO CHROMA/IF...
  • Page 21 CHROMA/IF SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO AV C_V_OUT_SW Y_V_OUT_SW FROM/TO MICON/TUNER TUNER_VIDEO R214 SYNC_OUT TUNER_AUDIO_L AUDIO TUNER_AUDIO_R BUFFER C213 Q201 2SC2412K OSD_B OSD_G C615 R608 FROM AV OSD_R C212 1/4W W820 R205 TV BUFFER 0.01 B OSD_BLK Q202 TV BUFFER CD701B 2SC2412K PROTECT...

  • Page 22: Deflection Schematic Diagram

    DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) V.OUTPUT IC IC401 LA78041 THERMAL PROTECTION PUMP UP 25.0 12.0 25.0 R407 5.6K BUFFER Q408 BUFFER KTA1266 Q409 R448 KTA1266 C411 R414 500V 27K +-1% R417 33K FROM/TO DY L403 ELC16B501EN V801 R459_2 CP401 A60LVY196X11(O) B06B-DVS 1 1W F DRIVE...

  • Page 23: Power Schematic Diagram

    POWER SCHEMATIC DIAGRAM (MAIN PCB) 6.3A 125V CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE 6.3A 125V(F501) ATTENTION: POUR UNE PROTECTION CONTINUE LES RISQUES D’INCEIE N’UTILISER QUE DES FUSIBLE DE MEME TYPE 6.3A 125V(F501) TO COMBI/FILTER D516 RELAY DRIVE...
  • Page 24 SOUND SCHEMATIC DIAGRAM (MAIN PCB) FROM AV R314 SW_AUDIO_R 8.2K R324 C334 SW_AUDIO_L 1.8K 0.033 B C332 R326 C331 0.47 B 100 1/4W 0.022 R328 1.8K TONE 136K R301 C306 R303 C308 AMP1 I2C BUS INTERFACE 0.0033 0.033 SIMAMP1 VOLAMP1 6.5K 6.5K 6.5K...
  • Page 25 AV SCHEMATIC DIAGRAM (MAIN PCB) TO CHROMA/IF CD701A CH243001 YUV_IN(REAR) J704 MSP-213V1-652_PBSN A/V_OUT(REAR) J708 MSP-213V2-432_PBSN LINE2(REAR) J703 FROM POWER MSP-213V2-432_PBSN L703 P.CON+9V 47uH 0305 C713 R751 C714 R752 FROM/TO COMB/FILTER C715 SW_VIDEO_OUT R713 LINE1(REAR) J701 C705 Y_V_OUT_COMB BUFFER MSP-213V2-432_PBSN Q709 KANP C_V_OUT_COMB 2SA1037AK...
  • Page 26 COMB/FILTER SCHEMATIC DIAGRAM (MAIN PCB) L1511 15uH L1505 0305 15uH 0305 C1523 BUFFER 8.15 Q1506 120P CH 2SA1037AK BUFFER BUFFER 4.92 Q1503 W852 C1513 2.77 Q1505 1.50 2SC2412K 2SC2412K 0.1 B 2.14 R1521 C1535 C1519 R1515 1K 1/4W 0.1 B COMB FILTER IC IC1501 LA76600M-TLM...
  • Page 27 CRT/VM COIL SCHEMATIC DIAGRAM (CRT/VM COIL PCB) PCB110 TCA391 TP804 R828 2.7K 1/4W RED AMP Q801 123.5 R813 KTC4217 220 1/4W D801 1SS133 RED AMP IC851 VM+12V Q810 R801 KIA78L12BP-AT KTC3199_Y FROM DEFLECTION 100 1/4W R810 FROM DEFLECTION CP801_1 CP851_1 1.8K 1/4W A2001WV2-10P A2001WV2-5P...
  • Page 28 WAVEFORMS MICON/TUNER 1 1V 0.1µs/div 1V 20µs/div 11 0.5V 20µs/div 2 1V 1µs/div 7 1V 20µs/div 12 1V 2µs/div 0.5V 10ms/div 3 1V 50µs/div 13 1V 20µs/div 4 1V 0.1ms/div 9 1V 50µs/div 14 2V 20µs/div CHROMA/IF 10 2V 20µs/div 5 1V 50µs/div 15 2V 20µs/div NOTE:...
  • Page 29 WAVEFORMS DEFLECTION 16 2V 5ms/div 21 200V 50µs/div 26 5V 2ms/div SOUND 27 5V 2ms/div 22 2V 5ms/div 17 20V 5ms/div 18 10V 10ms/div 23 2V 5ms/div 28 200mV 20µs/div 19 20V 20µs/div 24 2V 5ms/div 29 200mV 20µs/div 20 2V 20µs/div 25 2V 5ms/div 30 2V 20µs/div NOTE:...
  • Page 30 WAVEFORMS 31 1V 50µs/div 38 50V 20µs/div 39 50V 20µs/div 32 2V 5ms/div 33 2V 5ms/div 34 0.5V 20µs/div CRT/SVM 37 50V 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 31: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW PCB110 (CRT PCB) PCB060 (VM COIL PCB) PCB010 (MAIN PCB)

  • Page 32: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description AD301132 A3L3020720 CABINET,FRONT ASSY AD301133 726000A030 SHEET,CRT NO. AD300520 800WQ00068 FELT SHEET BZ710258 741WUA0001 SPRING,EARTH AD301113 723000B873 FILM,DECORATION AD301134 A3L3020740 CABINET,BACK ASSY AD300132 7230006818 SHEET,CAUTION (FOR CANADA) AD300007 7230006755 SHEET,CAUTION (FOR USA) AD300426 701WPJ1002...

  • Page 33: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description RESISTORS ! R001 AD300656 R002T2683J 68K OHM 1/2W ! R410 AD301119 R3X28A271J R,METAL OXIDE 270 OHM 2W ! R413 BZ210114 R4X5T6123F R,METAL 12K OHM 1/6W ! R414 BZ210089 R4X5T6273F R,METAL 27K OHM 1/6W ! R416...
  • Page 34 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description DIODES D403 BZ410019 D97U03001B DIODE,ZENER MTZJ30B T-77 D404 BZ410023 D97U09R11B DIODE,ZENER MTZJ9.1B T-77 ! D405 BZ410063 D2WTAU02A0 DIODE,SILICON AU02A-EIC ! D406 BZ410021 D97U05R61B DIODE,ZENER MTZJ5.6B T-77 ! D407 BZ410063 D2WTAU02A0 DIODE,SILICON AU02A-EIC...
  • Page 35 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description TRANSISTORS Q103 BZ510071 TNAAB05003 COMPOUND TRANSISTOR KRC102SRTK Q109 BZ510002 T8YJ2412K0 TRANSISTOR,SILICON 2SC2412KT146 R,S Q201 BZ510002 T8YJ2412K0 TRANSISTOR,SILICON 2SC2412KT146 R,S Q202 BZ510002 T8YJ2412K0 TRANSISTOR,SILICON 2SC2412KT146 R,S Q203 BZ510001 T6YJ1037K0 TRANSISTOR,SILICON 2SA1037AKT146R,S Q204 AD300030...
  • Page 36 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description COILS &TRANSFORMERS L1510 AD300613 02167F150J COIL L1511 AD300613 02167F150J COIL L1512 AD301033 021LA6220J COIL T401 AD301125 0450190161 TRANS,HORIZONTAL DRIVE ETH19Y203AY ! T501 AD301034 048140066S TRANSFORMER,SWITCHING 8140066S JACKS J701 AD301038 060J431019 RCA JACK MSP-213V2-432 PBSN...
  • Page 37 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description MISCELLANEOUS ! V801 AD301131 098W250401 CRT W/DY A60LVY196X11(O) X101 AD300624 1001T8R004 CERAMIC,OSCILLATOR EFOEC8004T4 X601 BZ613004 100CT3R505 CRYSTAL HC-49/C RESISTOR RC....CARBON RESISTOR CAPACITORS CC....CERAMIC CAPACITOR CE....ALUMI ELECTROLYTIC CAPACITOR CP....
  • Page 38 TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...

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