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Toshiba 27A62 Service Manual

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FILE NO. 050-200204

SERVICE MANUAL

COLOR TELEVISION
27A62
DOCUMENT CREATED IN JAPAN, Apr., 2002

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  Summary of Contents for Toshiba 27A62

  • Page 1: Service Manual

    FILE NO. 050-200204 SERVICE MANUAL COLOR TELEVISION 27A62 DOCUMENT CREATED IN JAPAN, Apr., 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 Wake Up Timer Timer Back-up (at Power Off Mode) more than 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...
  • Page 5 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 6 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 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. Remocon Key Set Key Operations Releasing of V-CHIP PASSWORD.
  • 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 digital voltmeter is 135 ±...
  • Page 12 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 13 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 14 ELECTRICAL ADJUSTMENTS 2-18: PIP VERTICAL POSITION L Receive the monoscope pattern. Using the remote control, set the brightness and contrast to normal position. 35mm Activate the adjustment mode display of Fig. 1-1 and press the channel button (42) on the remote control to select "V.
  • Page 15 ELECTRICAL ADJUSTMENTS 2-24: Confirmation of Fixed Value (Step No.) Please check if the fixed values of the each adjustment items are set correctly referring below. FUNCTION V. POSI H. SIZE V. CENT VS. CORR SUBCONT UNI COL CENT UNI COL MIN BRI.
  • Page 16: 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 17: 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 CP101 CP401 FB401 VR401 TP002 CP1001 TU001 IC751 (SOLDER SIDE) SPEAKER VR502 CP702A CP502 CP501 CD501 L503 AC IN MAIN PCB CP702B VIDEO JACK PCB...
  • Page 18: Tv Block Diagram

    TV BLOCK DIAGRAM IC1801 M65664FP SPEAKER SP1001 SCLK TU051 SDATA CSYNCS 35 37 39 52 51 50 11 16 TU001 ANALOG SW IC751 MM1234 SOUND AMP IC1001 1 14 AN5276 PIP IF IC251 M52768FP 52 51 50 OSD BLK PIP VIDEO SW IC750 BA7645N YUV IN MICON...
  • Page 19: Printed Circuit Boards

    PRINTED CIRCUIT BOARDS P-IN-P SOLDER SIDE (CHIP MOUNTED PARTS) (INSERTED PARTS) SOLDER SIDE SOLDER SIDE R802 X750 C797 C777 R273 R271 Q811 C266 C267 R270 IC752 C779 C274 C775 C264 IC251 R796 R777 C258 C780 C259 R261 C262 L803 R266 R052 L1805 Q252...
  • Page 20 PRINTED CIRCUIT BOARDS MAIN/VIDEO JACK (INSERTED PARTS) SOLDER SIDE J701 J704 CP801A CP101 R432 J702 CD801 C427 W085 D411 J703 J708 R437 W176 C417 C418 C425 CP401_1 CD701A IC701 W172 R439 D405 W815 W204 L402 W110 Q405 VR401 W108 TP002 L751 W203 W106...
  • Page 21 PRINTED CIRCUIT BOARDS MAIN/VIDEO JACK (CHIP MOUNTED PARTS) SOLDER SIDE R104 R727 Q509 Q704 R739 Q705 Q104 IC199 R113 R1509 R155 C331 R1530 R1523 R134 R516 R513 Q1508 Q1504 R116 R1521 R324 C334 R1524 R114 R1515 R532 C330 Q1506 R1517 C333 C928 C1522...
  • Page 22 MICON / TUNER SCHEMATIC DIAGRAM (MAIN PCB) OS101 RPM7138-H5 ACCESORY TU001 ENV56DA6H6 TEST POINT CP101 BT001 TKC-M07X-A1 R03(AB)E_20_T I2C SCL I2C SDA R003 TM101 I2C OFF 330K BT002 SBKMOP017B R03(AB)E_20_T H-BUFFER Q102 2SC2412K C003 V-BUFFER RED LED Q101 POWER ON 2SC2412K TP001 D109...
  • Page 23: 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 2SC2412K OSD_BLK PROTECT C615 R608 C212 1/4W FROM/TO AV R205 TV BUFFER 0.01 B Q202 TV BUFFER CD701B 2SC2412K Q203 CH243001 2SA1037AK...
  • Page 24: Deflection Schematic Diagram

    DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) V.OUTPUT IC401 LA78041 THERMAL PROTECTION PUMP UP 25.0 12.0 25.0 R407 3.9K 1/4W C411 R414 R417 500V R460 R408 27K +-1% 1K 1/4W V801 A68AJB82X10 1/2W SWITCH Q460 KRC111SRTK FROM/TO DY HS402 FROM/TO POWER 763WAA0231 CP401_1 P.CON+5V TS-80P-04-V1...
  • Page 25: 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’UTOLISER QUE DES FUSIBLE DE MEME TYPE 6.3A 125V(F501) D516 RELAY DRIVE Q504 10.9 1SS133...
  • Page 26 SOUND SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO 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 1.8K AMP2...
  • Page 27 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/TO 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 28 VIDEO SWITCH SCHEMATIC DIAGRAM (MAIN PCB) PIP-VIDEO SW. IC750 BA7645N MUTE LOGIC FROM/TO MICON/TUNER L751 100uH PIP_AV1 PIP_AV2 L750 FROM/TO P-IN-P/TUNER 100uH PIP_SD C756 CP752 IMSA-9130B-09 KANP P.CON+9V PIP_AFT R761 BUFFER BUFFER PIP/OSD_SW Q751 Q750 OSD_B 2SA1037AK BUFFER PIP BT 2SC2412K OSD_G Q755...
  • Page 29 DIGITAL COMB FILTER SCHEMATIC DIAGRAM (MAIN PCB) L1511 15uH 0305 L1505 BUFFER BUFFER Q1506 BUFFER Q1508 15uH W859 Q1505 2SA1037AK 2SC2412K FROM/TO AV 0305 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 FROM/TO POWER...
  • Page 30: Crt Schematic Diagram

    CRT SCHEMATIC DIAGRAM (CRT PCB) TP804 R828 FROM/TO DEFLECTION 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 2SC1740SP 582.0 100 1/4W R810 180V 117.0 C813 1.8K 1/4W...
  • Page 31 PICTURE IN PICTURE SCHEMATIC DIAGRAM (P-IN-P PCB) CD051 SYNC DET IC C15-042-07 IC752 LA7210 1/32 TU051 ENV56DC0G3 COUNTDOWN CORP SYNC R779 BUFFER X750 R783 R772 Q795 2SC2412K 1.2K R774 CSB500E5 L1804 10uH REG.+5V LEVEL SHIFT IC051 KIA7805API IC1803 TC7SET08F R1801 100 1/4W P-In-P PIP_AGC...
  • Page 32 WAVEFORMS MICON/TUNER 2.0V 50ns/div 500mV 10µs/div 500mV 50µs/div 2.0V 50ns/div 200mV 10µs/div 100mV 100ns/div 1.0V 5ms/div 2.0V 50µs/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 33 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 34: Picture In Picture

    50V 10µs/div 500mV 10µs/div 1.0V 1ms/div 50V 10µs/div 1.0V 1ms/div 50V 10µs/div 1.0V 10µs/div PICTURE IN PICTURE 200mV 10µs/div NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 35: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW PCB110 (CRT PCB) PCB010 (MAIN PCB) PCB250 (P-IN-P PCB) PCB170 (VIDEO JACK PCB)
  • Page 36: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description AD301369 A3L515E720 CABINET,FRONT ASSY AD300757 771WPA0263 PLATE,JACK AD301370 899EFBA002 WIRING-CLIP BZ710260 899HV3T000 HOLDER,ANODE WIRE AD300759 741WUA0021 SPRING,EARTH AD301371 701APJ0084 CABINET,FRONT AD301372 712APB0002 DOOR AD301373 702APA0134 CABINET,BACK AD301374 711WPA0168 PLATE,FRONT AD301375 713WPA0202 GLASS,LED...
  • Page 37: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description RESISTORS ! R055 AD300041 R3X18A270J R,METAL OXIDE OHM 2W ! 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...
  • Page 38 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description DIODES D415 BZ410043 D2WT011E10 DIODE,SILICON 11E1-EIC 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...
  • Page 39 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description TRANSISTORS Q202 BZ510002 T8YJ2412K0 TRANSISTOR,SILICON 2SC2412KT146 R,S Q203 BZ510001 T6YJ1037K0 TRANSISTOR,SILICON 2SA1037AKT146R,S Q204 AD300734 T8AA03881S TRANSISTOR,SILICON KTC3881S-RTK Q251 AD300734 T8AA03881S TRANSISTOR,SILICON KTC3881S-RTK AD300030 T83A028140 TRANSISTOR,SILICON 2SC2814(F3,F4)-T Q252 BZ510001 T6YJ1037K0 TRANSISTOR,SILICON 2SA1037AKT146R,S ! Q402...
  • Page 40 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description COILS &TRANSFORMERS L604 BZ310040 02167F470J COIL L701 BZ310005 02167D101K COIL 100 UH L750 BZ310041 02167F101J COIL 100 UH L751 BZ310002 021673101K COIL 100 UH L753 BZ310041 02167F101J COIL 100 UH L802 AD300123 021673151K...
  • Page 41 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description MISCELLANEOUS CP702B BZ614276 067U005049 WIRE HOLDER B2013H02-5P CP801A BZ614273 067U010049 WIRE HOLDER B2013H02-10P CUS011 BZ710279 800WFAA006 CUSHION A CUS012 BZ710279 800WFAA006 CUSHION A EL001 BZ614044 124120301A EYE LET XRY20X30BD EL002 BZ614043 124116281A...
  • Page 42 TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...