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Toshiba 29AS42 Service Manual
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Toshiba 29AS42 Service Manual

Toshiba 29AS42 Service Manual

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FILE NO. 050-200208
SERVICE MANUAL
COLOR TELEVISION
29AS42
DOCUMENT CREATED IN JAPAN, Jun., 2002

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  • Page 1 FILE NO. 050-200208 SERVICE MANUAL COLOR TELEVISION 29AS42 DOCUMENT CREATED IN JAPAN, Jun., 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 27 inch / 676mmV System CRT Type Normal Deflection degree Magnetic Field BV/BH +0.45G/0.18G Color System NTSC Speaker 2Speaker Position Front Size 2.0 x 3.5 Inch Impedance Sound Output 2.5 + 2.5 W 10%(Typical) 2.0 + 2.0 W NTSC3.58+4.43 /PAL60Hz...

  • Page 4: Pip Source

    GENERAL SPECIFICATIONS On Screen Menu Display Menu Type Icon Picture Contrast Brightness Color Tint Sharpness Audio Bass Treble Balance BBE On/Off Stable Sound On/Off Set Up PIP SOURCE TV/CABLE(CATV) CH Program Add/Erase Option Language V-chip CH Label Favorite CH 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-BF h 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...
  • Page 6 Features Auto Degauss Auto Shut Off Canal+ CATV Anti-theft Rental Memory(Last CH) Memory(Last Volume) V-Chip Type USA,Toshiba Type Auto Search CH Allocation Just Clock Function CH Label VM Circuit Full OSD Premiere Comb Filter 3 Lines Auto CH Memory Hotel Lock...
  • Page 7 GENERAL SPECIFICATIONS G-13 Interface Switch Front Power System Select Main Power SW Sub Power Channel Up Channel Down Volume Up Volume Down Rear AC/DC TV/CATV Selector Degauss Main Power SW Indicator Power Stand-by On Timer Terminals Front Video Input Audio Input RCA x 2 Other Terminal Rear...

  • Page 8: Removal Of Anode Cap

    DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF ANODE CAP 3. After one side is removed, pull in the opposite direction to 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 9: 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 a FLAT PACKAGE IC 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 10 DISASSEMBLY INSTRUCTIONS INSTALLATION When bridge-soldering between terminals and/or the soldering amount are not enough, resolder using a Thin-tip Take care of the polarity of new IC and then install the new Soldering Iron. (Refer to Fig. 2-8.) IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily.

  • Page 11: 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 Releasing of V-CHIP PASSWORD and LOCK PASSWORD.

  • Page 12: 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 digital voltmeter is 135 ±...
  • Page 13 ELECTRICAL ADJUSTMENTS 2-7: VERTICAL POSITION 2-11: SUB 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, Adjust the VR401 until the horizontal line becomes fit to color and tint to normal position.
  • Page 14 ELECTRICAL ADJUSTMENTS 2-12: CONTRAST MAX MANUAL 2-14: LEVEL Activate the adjustment mode display of Fig. 1-1 and Receive the VHF HIGH (70dB). press the channel button (18) on the remote control to Connect the AC voltmeter to pin 6 of CP101 and the pin select “CONT.

  • Page 15: Purity And Convergence Adjustments

    ELECTRICAL ADJUSTMENTS 3. PURITY AND CONVERGENCE 3-3: STATIC 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 16: Electrical Adjustment Parts Location Guide (Wiring Connection)

    ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CRT PCB R804 TP804 TP806 CP804 J801 CD803 CP805 CP806 CD805 CP801A CP401 FB401 VR401 TP002 CP1001 TU001 SPEAKER VR502 CP702A CP502 CP501 CD501 L503 AC IN MAIN PCB CP702B VIDEO JACK PCB...

  • Page 17: Tv Block Diagram

    TV BLOCK DIAGRAM CH DOWN MICON IC101 OEC7074A VOL_DOWN KEY 1 POWER PROTECT OS101 KEY 2 CH UP RESET IC REMOCON IC103 PST600C T501 Q601, Q603 X.IN VOL_UP PROTECT RESET SOUND+B TU001 X101 Q502 BLUE B 8MHz SPEAKER SP1001 SWITCHING MEMORY IC GREEN G X.OUT...
  • Page 18 PRINTED CIRCUIT BOARDS MAIN/VIDEO JACK (INSERTED PARTS) SOLDER SIDE CP801A CP101 CD801 R432 J702 J701 C427 W085 D411 J704 J703 J708 W176 R437 C418_2 C417 C425 CP401_1 IC701 CD701A W172 R439 D405 VR401 L402 W110 Q405 TP002 W108 W203 W106 C411 CP1001 W036...
  • Page 19 PRINTED CIRCUIT BOARDS MAIN/VIDEO JACK (CHIP MOUNTED PARTS) SOLDER SIDE R104 R727 Q509 Q704 R739 Q705 IC199 R1509 R155 C331 R1530 R1523 R516 R134 R513 Q1508 R116 Q1504 R1521 R324 C334 R1524 R532 R114 R1515 C330 Q1506 R1517 C333 C928 R146 C1522 C931...
  • Page 20 PRINTED CIRCUIT BOARDS SOLDER SIDE R802 Q811 L803 C813 CP804 C808 W002 D801 W001 Q810 D803 Q812 R803 R808 CP803...
  • Page 21 MICON/TUNER SCHEMATIC DIAGRAM (MAIN PCB) OS101 RPM7138-H5 TEST POINT ACCESORY TU001 ENV56DB6G3 CP101 TKC-M07X-A1 BT001 R03(AB)E_20_T I2C_SCL I2C_SDA R003 R004 TM101 I2C_OFF 330K BT002 SBKMOP006B R03(AB)E_20_T H-BUFFER Q102 2SC2412K C003 V-BUFFER RED LED TP001 Q101 POWER ON 2SC2412K D109 SLR-342VCT32 FROM/TO CHROMA/IF MICON IC IC101...

  • Page 22: Chroma/If Schematic Diagram

    CHROMA/IF SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO AV C_V_OUT_SW Y_V_OUT_SW FROM/TO MICON/TUNER TUNER_VIDEO SYNC_OUT TUNER_AUDIO_L TUNER_AUDIO_R AUDIO BUFFER C213 Q201 W813 2SC2412K OSD_B W808 OSD_G C615 R608 W802 FROM AV OSD_R C212 OSD_BLK 1/4W R205 TV BUFFER 0.01 B PROTECT Q202 TV BUFFER CD701B 2SC2412K...

  • Page 23: Deflection Schematic Diagram

    DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) V.OUTPUT IC IC401 LA78041 THERMAL PROTECTION PUMP UP 25.0 12.0 25.0 R407 3.9K 1/4W C411 R414 500V R460 27K +-1% R417 33K R408 1K 1/4W V801 A68AJB82X10 1/2W SWITCH Q460 KRC111SRTK TO DY FROM POWER HS402 763WAA0231 CP401_1...

  • Page 24: 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) D516 RELAY DRIVE Q504...
  • Page 25 SOUND SCHEMATIC DIAGRAM (MAIN PCB) FROM AV R314 SW_AUDIO-R 2.7K R324 C334 SW_AUDIO-L 1.8K 0.033 B R326 C331 C332 0.022 0.47 R328 1.8K TONE 136K AMP1 I2C BUS INTERFACE SIMAMP1 VOLAMP1 6.5K 6.5K 6.5K VOLAMP2 CONTROL SIMAMP2 6.5K LOGIC TONE 136K AMP2 1.8K...
  • Page 26 AV SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO CHROMA/IF CD701A CH243001 YUV_IN(REAR) J704 MSP-213V1-652_PBSN A/V_OUT(REAR) J708 MSP-213V2-432_PBSN SW_A_OUT_R2 SW_A_OUT_L2 LINE2(REAR) J703 FROM POWER MSP-213V2-432_PBSN P.CON+9V C713 R751 C714 R752 FROM/TO COMB FILTER SW_VIDEO_OUT C715 R713 LINE1(REAR) Y_V_OUT_COMB J701 C705 BUFFER MSP-213V2-432_PBSN C_V_OUT_COMB Q709 KANP 2SA1037AK...
  • Page 27 DIGITAL COMB FILTER SCHEMATIC DIAGRAM (MAIM PCB) L1511 15uH 0305 L1505 BUFFER BUFFER Q1506 15uH BUFFER Q1508 W859 Q1505 2SA1037AK 2SC2412K 0305 FROM/TO AV 2SC2412K C1524 R1515 R1521 C1535 Y_V_OUT_COMB BUFFER 20P CH Q1503 C1513 2SC2412K 0.1 B C1519 C_V_OUT_COMB SW_VIDEO_OUT COMB FILTER IC IC1501...

  • Page 28: Crt Schematic Diagram

    CRT SCHEMATIC DIAGRAM (CRT PCB) TP804 FROM DEFLECTION R828 2.7K 1/4W CP805_1 (CP801A) A2001WV2-10P RED/GREEN AMP Q801 123.5 P.CON+9V R813 2SC2621 G.OUT 220 1/4W R.OUT B.OUT D801 HEATER 1SS133 RED/GREEN AMP Q810 R801 121.0 2SC1740S TP 582.0 1/4W R810 180V 117.0 C813 1.8K 1/4W...
  • Page 29 WAVEFORMS MICON/TUNER 2.0V 50ns/div 500mV 10µs/div 500mV 50µs/div 2.0V 50ns/div 200mV 10µs/div 100mV 100ns/div 2.0V 50µs/div 1.0V 5ms/div 1.0V 20µs/div 2.0V 50µs/div 1.0V 20µs/div 1.0V 20µs/div CHROMA/IF 200mV 10µs/div 2.0V 20µs/div 1.0V 20µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 30 WAVEFORMS DEFLECTION 1.0V 5ms/div 200V 20µs/div 500mV 1ms/div SOUND 10V 5ms/div 1.0V 2ms/div 500mV 1ms/div 10V 5ms/div 1.0V 2ms/div 200mV 20µs/div 50V 20µs/div 20mV 1ms/div 200mV 20µs/div 2.0V 20µs/div 20mV 1ms/div 100mV 10µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 31 WAVEFORMS 50V 10µs/div 500mV 10µs/div 1.0V 1ms/div 50V 10µs/div 1.0V 1ms/div 1.0V 10µs/div 50V 10µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 32: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW PCB110 (CRT PCB) PCB010 (MAIN PCB) PCB170 (VIDEO JACK PCB)

  • Page 33: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description AD301470 A3L509E720 CABINET,FRONT ASSY AD300757 771WPA0263 PLATE,JACK AD301370 899EFBA002 WIRING-CLIP BZ710260 899HV3T000 HOLDER,ANODE WIRE AD300759 741WUA0021 SPRING,EARTH AD301471 701APJA109 CABINET,FRONT AD301472 712APBA003 DOOR AD301373 702APA0134 CABINET,BACK AD301374 711WPA0168 PLATE,FRONT AD301375 713WPA0202 GLASS,LED...

  • Page 34: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description RESISTORS R160 AD301413 R00106105J 1M OHM 1/6W ! R410 AD301344 R3X18A151J R,METAL OXIDE 150 OHM 2W ! R416 AD301013 R002T23R9J 3.9 OHM 1/2W ! R420 AD301345 R002T22R7J 2.7 OHM 1/2W ! R426 AD301014 R4X5T6472F...
  • Page 35 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description DIODES D460 BZ410006 D1VT001330 DIODE,SILICON 1SS133T-77 ! D501 BZ410085 D2WXN40050 DIODE,SILICON 1N4005-EIC ! D502 BZ410085 D2WXN40050 DIODE,SILICON 1N4005-EIC ! D503 BZ410085 D2WXN40050 DIODE,SILICON 1N4005-EIC ! D504 BZ410085 D2WXN40050 DIODE,SILICON 1N4005-EIC ! D505 BZ410052...
  • Page 36 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description TRANSISTORS ! Q506 BZ510001 T6YJ1037K0 TRANSISTOR,SILICON 2SA1037AKT146R,S ! Q507 BZ510069 TCATC31980 TRANSISTOR,SILICON KTC3198-AT(Y,GR) ! Q508 AD300611 TAAT01273Y TRANSISTOR,SILICON KTA1273_Y Q509 BZ510071 TNAAB05003 COMPOUND TRANSISTOR KRC102SRTK ! Q510 BZ510031 TD3T007340 TRANSISTOR,SILICON 2SD734(E,F)-AA ! Q512...
  • Page 37 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description SWITCHES SW101 BZ612001 0504201T31 SWITCH,TACT SKHVBED010 SW102 BZ612001 0504201T31 SWITCH,TACT SKHVBED010 SW103 BZ612001 0504201T31 SWITCH,TACT SKHVBED010 SW104 BZ612001 0504201T31 SWITCH,TACT SKHVBED010 SW105 BZ612001 0504201T31 SWITCH,TACT SKHVBED010 VARIABLE RESISTORS VR401 BZ210218 V1K63H3BTE VOLUME,SEMI FIXED...
  • Page 38 TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...

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