Toshiba 27A34 Service Manual
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Toshiba 27A34 Service Manual

Toshiba 27A34 Service Manual

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FILE NO. 050-200410
SERVICE MANUAL
COLOR TELEVISION
27A34
DOCUMENT CREATED IN JAPAN, Mar., 2004

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  • Page 1 FILE NO. 050-200410 SERVICE MANUAL COLOR TELEVISION 27A34 DOCUMENT CREATED IN JAPAN, Mar., 2004...

  • 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: Table Of Contents

    TABLE OF CONTENTS SERVICING NOTICES ON CHECKING ..................A1-1 A1-1 HOW TO ORDER PARTS ......................IMPORTANT ..........................A1-1 TABLE OF CONTENTS ......................A2-1 A3-1~A3-6 GENERAL SPECIFICATIONS ....................DISASSEMBLY INSTRUCTIONS 1. REMOVAL OF ANODE CAP ....................B1-1 2. REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ..........B2-1, B2-2 SERVICE MODE LIST ........................

  • Page 4: 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 5 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 Surround On/Off Set Up TV/CABLE(CATV) CH Program Add/Erase Option Language V-chip CH Label Favorite CH Lock On/Off Timer Color Stream DVD/DTV Control Level...
  • Page 6 GENERAL SPECIFICATIONS G-10 Remote Unit RC-GQ 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 7 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 8 GENERAL SPECIFICATIONS G-12 Accessories Owner's Manual Language English / French[From '04 APR O/R] 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 Facility List Important Safety Instruction Dew/AHC Caution Sheet...
  • Page 9 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 Yes(RED) Stand-by On Timer Terminals Front Video Input Audio Input RCA x 2 Other Terminal...

  • Page 10: Disassembly Instructions

    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 11: Removal And Installation Of Flat Package Ic

    DISASSEMBLY INSTRUCTIONS When IC starts moving back and forth easily after REMOVAL AND INSTALLATION OF 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 12 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 13: 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.

  • Page 14: Electrical Adjustments

    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. Place the set with Aging Test for more than 5 minutes. CAUTION Using the remote control, set the brightness and contrast •...
  • Page 15 ELECTRICAL ADJUSTMENTS 2-6: HORIZONTAL SIZE 2-11: PARABOLA Receive the monoscope pattern. Receive the crosshatch signal from the Pattern Generator. Using the remote control, set the brightness and contrast Using the remote control, set the brightness and contrast to normal position. to normal position.
  • Page 16 ELECTRICAL ADJUSTMENTS 2-15: TINT/COLOR CENT 2-17: SEPARATION 1, 2 Receive the color bar pattern. Please do the method (1) or method (2) adjustment. Connect the oscilloscope to TP024. Method (1) Activate the adjustment mode display of Fig. 1-1 and press the channel button (24) on the remote control to Set the multi-sound signal generator for each different select "TINT".

  • Page 17: 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 18: Electrical Adjustment Parts Location Guide (Wiring Connection)

    ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CRT PCB CP806 TP024 R805 R803 TP022 J801 CP803 CP802B CP801B CD801 CD802 CP801A CP101 FB401 CP401 VR401 TP003 W003 VR502 AC IN SPEAKER CP802A CP502 L503 CP501 CP1001 J705 J706 J707 MAIN PCB...

  • Page 19: Block Diagrams

    BLOCK DIAGRAM TU001 SPEAKER MICON SP1001 10 13 12 IC101 OEC7090A MEMORY IC IC199 30 SCL1 S-24C16AFJA-TB-01 SDA1 S_IN S INPUT YUV IN SOUND AMP IC IC1001 CHROMA IC AN17808B IC601 M61283FP R70T 27 26 44 48 19 14 V OUT AUDIO IN3 SOUND DECORDER IC IC902...

  • Page 20: Printed Circuit Boards Main/Crt

    PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE CP801A CD801A C426 J704 C427 J701 J703 J708 C413_1 J702 D411 W827 CP101 D407 D705 D701 D405 W006 D704 D703 W861 D608 D702 R459_2 C421_1 W062 W134 W061 W060 W132 C442 R710 W131 W058 W819...
  • Page 21 PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) SOLDER SIDE Q101 R109 IC199_1 R724 R101 C128 C719 C720 R112 R113 R907 C312 C303 C102 C104 IC302 IC902 C115 C911 C301 R136 IC101 R906 C917 R125 R128 Q902 R137 R150 C106 Q901 C913 R131 C805_1...

  • Page 22: Micon

    MICON SCHEMATIC DIAGRAM ACCESSORY (MAIN PCB) BT001 R03(AB)E_2P_G OS101 TM101 RPM7138-WH5 BT002 RC-GQ010 R03(AB)E_2P_G CP101 173979-7 Vout LED SW Q101 R109 I2C_SCL KTC3875S_Y_RTK I2C_SDA I2C_OFF R101 AUDIO L AUDIO R R103 R106 2.7K R130 R150 CLAMP SW Q103 47K 1/4W KTC3875S_Y_RTK FROM/TO CHROMA TO SOUND...

  • Page 23: Chroma Schematic Diagram

    CHROMA SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO AV VIDEO_IN2 V_IN[YUV] R616 VIDEO_IN1 120 1/2W AT+5V REG U_IN[YUV] R617 Q607 Y_IN[YUV] KTC3203_Y VIDEO_IN3 VIDEO_OUT R603 330 1/2W FROM/TO COMB FILTER FROM/TO MICON C_V_OUT_SW P.CON+5V PROTECT Y_V_OUT_SW P.CON+5V REG C641 VIDEO_OUT Q606 C IN(Y/C) Y SW OUT SW_Y_OUT KTC3209_Y...

  • Page 24: Deflection Schematic Diagram

    DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO DY V.OUTPUT IC IC401 LA78041 V801 CP401 THERMAL PROTECTION M68LWF088X B06B-DVS PUMP UP L402 ELH5L4132N 25.0 12.0 25.0 R407 1.2K R439 1K 1W TO CRT/SVM C425 CD803_1 (CP805) 0.001 CU823001 BUFFER R414 R417 Q409 FB401_2 FJN27A003_M KTA1266 8.2K +-1%...

  • Page 25: Power Schematic Diagram

    POWER SCHEMATIC DIAGRAM (MAIN PCB) D516 RELAY DRIVE Q504 10.9 1SS133 KTC3198 R515 10K 1/4W RY501 ALKS321 TO SOUND R517_1 D505 W806 SOUND+B 30DF6-FC 0.39 3W R541_1 DEGAUSS COIL R501 L503 P.CON+12V CP502 8R270010 1 7W 0.22 1W A1561WV2-2P SOUND_GND D517 CP507 COIL,LINE FILTER...

  • Page 26: Sound

    SOUND SCHEMATIC DIAGRAM (MAIN PCB) FROM TUNER/STEREO R302 SW_AUDIO_L R301 2.7K 1/4W SW_AUDIO_R W832 2.7K 1/4W C309 0.039 L IN L ONT Tone Volume 2.2K SURR Balance Control Control /MUTE MODE control R IN Vref R OUT R303 100 1/4W FROM CHROMA R304 L301...

  • Page 27: Tuner/Stereo

    TUNER/STEREO SCHEMATIC DIAGRAM (MAIN PCB) TU001 115-V-K015AR_B FROM/TO CHROMA TUNER+5V NC NC TUNER_VIDEO W812 P.CON+8V[B] P.CON+5V FROM POWER R001 P.CON+B 68K 1/2W R002 68K 1/2W TO MICON FROM/TO MICON J_AUDIO_OUT_L C901 BUFFER Q901 KTA1504S_Y_RTK J_AUDIO_OUT_R C902 BUFFER Q902 KTA1504S_Y_RTK TO SOUND L901 SW_AUDIO_L 100uH 0305...
  • Page 28 AV SCHEMATIC DIAGRAM (MAIN PCB) YUV_IN(REAR) J704 FROM/TO CHROMA MSP-213V1-652_NI_LF V_IN[YUV] U_IN[YUV] Y_IN[YUV] VIDEO_OUT VIDEO_IN2 A/V_OUT(REAR) VIDEO_IN1 J708 MSP-213V2-432_NI_LF VIDEO_IN3 C711 R708 C707 R704 R702 C728 R721 220 1/4W MUTE Q711 R703 R711 KTC3875S_Y_RTK 2.2K MUTE C710 BUFFER Q712 R710 Q709 KANP KTC3875S_Y_RTK...

  • Page 29: Crt

    CRT SCHEMATIC DIAGRAM (CRT PCB) CRT BLOCK (W/O SVM) FROM DEFLECTION FROM DEFLECTION CP806_1 SCREEN CP801B B2013H02-5P W802 180V HEATER FOCUS R802 FROM CHROMA 2.7K 1/4W R803 RED/GREEN OUT CP802B B2013H02-7P Q804 RED/GREEN OUT CLAMP 12K 2W KTC4217 Q801 100.6 123.0 R812 KTC3199_Y...

  • Page 30: Comb/Filter

    COMB/FILTER SCHEMATIC DIAGRAM (MAIN PCB) L1511 15uH 0305 BUFFER Q1508 KTC3875S_Y_RTK C1535 L1505 FROM AV 15uH 0305 S_VIDEO_IN[C] S_VIDEO_IN[Y] R1512 BUFFER Q1503 C1513 KTC3875S_Y_RTK 0.1 B VIDEO SW(Y) IC C1519 FROM MICON IC1502 MM1501XNRE Vin1 Y/C_SW V.OUT Vin2 VIDEO SW(C) IC IC1503 MM1501XNRE FROM/TO CHROMA...

  • Page 31: Waveforms

    WAVEFORMS MICON 0.5V 10ms/div 13 1V 20µs/div 1 1V 0.1µs/div 2 1V 1µs/div 14 2V 20µs/div 9 1V 50µs/div 10 2V 20µs/div 3 1V 50µs/div 15 2V 20µs/div DEFLECTION 4 1V 0.1ms/div 16 2V 5ms/div 11 0.5V 20µs/div CHROMA 12 1V 2µs/div 7 1V 20µs/div 17 20V 5ms/div NOTE:...
  • Page 32 WAVEFORMS 38 50V 20µs/div 25 2V 5ms/div 18 10V 10ms/div 19 20V 20µs/div 39 50V 20µs/div 26 5V 2ms/div SOUND 20 2V 20µs/div 22 2V 5ms/div 27 5V 2ms/div 23 2V 5ms/div 28 200mV 20µs/div 21 200V 50µs/div 37 50V 20µs/div 24 2V 5ms/div 29 200mV 20µs/div NOTE:...

  • Page 33: Mechanical Exploded Views

    MECHANICAL EXPLODED VIEW 102B 102B 102A PCB110 (CRT PCB ASS'Y) 102B PCB010 101E (MAIN PCB ASS'Y) 101D 101E 101C 101E 101B 101A...
  • Page 34 MECHANICAL EXPLODED VIEW (PACKING DIAGRAM) 118, 119, 120, 121, TM101...

  • Page 35: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST (FOR USA) Location No. TSB P/N Reference No. Description AE003348 A3N425N720 CABINET,FRONT ASSY 101A AE003349 701WPJC546 CABINET,FRONT 101B AD302098 713WPA0265 GLASS,LED 101C AD302096 713WPA0273 GUIDE,REMOCON 101D AE003350 735WPBA984 BUTTON ASS'Y 101E AE003071 800WQ0A041 FELT SHEET AE003351 A3N425N740 CABINET,BACK ASSY 102A...
  • Page 36 MECHANICAL REPLACEMENT PARTS LIST (FOR CANADA) Location No. TSB P/N Reference No. Description AE003348 A3N425N720 CABINET,FRONT ASSY 101A AE003349 701WPJC546 CABINET,FRONT 101B AD302098 713WPA0265 GLASS,LED 101C AD302096 713WPA0273 GUIDE,REMOCON 101D AE003350 735WPBA984 BUTTON ASS'Y 101E AE003071 800WQ0A041 FELT SHEET AE003351 A3N425N740 CABINET,BACK ASSY 102A...

  • Page 37: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST (FOR USA) Location No. TSB P/N Reference No. Description RESISTORS ! R410 AD302107 R3X18A470J R,METAL OXIDE OHM 2W R419 AD300784 R3X1811R2J R,METAL OXIDE 1.2 OHM 1W ! R426 BZ210030 R4X5T4472F R,METAL 4.7K OHM 1/4W ! R434 BZ210259 R5Y2CF1R8J R,CEMENT...
  • Page 38 ELECTRICAL REPLACEMENT PARTS LIST (FOR USA) Location No. TSB P/N Reference No. Description DIODES D415 BZ410043 D2WT011E10 DIODE,SILICON 11E1-EIC D416 BZ410006 D1VT001330 DIODE,SILICON 1SS133T-77 D417 BZ410006 D1VT001330 DIODE,SILICON 1SS133T-77 D419 BZ410006 D1VT001330 DIODE,SILICON 1SS133T-77 ! D501 BZ410062 D2WTRM11C0 DIODE,SILICON RM11C-EIC ! D502 BZ410062 D2WTRM11C0...
  • Page 39 ELECTRICAL REPLACEMENT PARTS LIST (FOR USA) Location No. TSB P/N Reference No. Description TRANSISTORS Q504 BZ510069 TCATC31980 TRANSISTOR,SILICON KTC3198-AT(Y,GR) Q505 BZ510011 TC3T029090 TRANSISTOR,SILICON 2SC2909(S,T)-AA Q507 BZ510069 TCATC31980 TRANSISTOR,SILICON KTC3198-AT(Y,GR) Q508 BZ510077 TAAT012714 TRANSISTOR,SILICON KTA1271_Y-AT Q509 BZ510069 TCATC31980 TRANSISTOR,SILICON KTC3198-AT(Y,GR) Q512 BZ510004 TA3T016240 TRANSISTOR,SILICON...
  • Page 40 ELECTRICAL REPLACEMENT PARTS LIST (FOR USA) Location No. TSB P/N Reference No. Description MISCELLANEOUS B403 BZ310129 024HT03564 CORE,BEADS W4BRH3.5X6X1.0 B405 BZ310129 024HT03564 CORE,BEADS W4BRH3.5X6X1.0 B501 BZ310045 024AT03481 CORE,BEADS BL02RN1-R62T2 B504 BZ310121 024HT03553 CORE,BEADS W5RH3.5X5X1.0 BT001 AE000012 1412004008 BATTERY,MANGAN R03(AB)E_2P_G BT002 AE000012 1412004008 BATTERY,MANGAN...
  • Page 41 ELECTRICAL REPLACEMENT PARTS LIST (FOR CANADA) Location No. TSB P/N Reference No. Description RESISTORS ! R410 AD302107 R3X18A470J R,METAL OXIDE OHM 2W R419 AD300784 R3X1811R2J R,METAL OXIDE 1.2 OHM 1W ! R426 BZ210030 R4X5T4472F R,METAL 4.7K OHM 1/4W ! R434 BZ210259 R5Y2CF1R8J R,CEMENT...
  • Page 42 ELECTRICAL REPLACEMENT PARTS LIST (FOR CANADA) Location No. TSB P/N Reference No. Description DIODES D415 BZ410043 D2WT011E10 DIODE,SILICON 11E1-EIC D416 BZ410006 D1VT001330 DIODE,SILICON 1SS133T-77 D417 BZ410006 D1VT001330 DIODE,SILICON 1SS133T-77 D419 BZ410006 D1VT001330 DIODE,SILICON 1SS133T-77 ! D501 BZ410062 D2WTRM11C0 DIODE,SILICON RM11C-EIC ! D502 BZ410062 D2WTRM11C0...
  • Page 43 ELECTRICAL REPLACEMENT PARTS LIST (FOR CANADA) Location No. TSB P/N Reference No. Description TRANSISTORS Q504 BZ510069 TCATC31980 TRANSISTOR,SILICON KTC3198-AT(Y,GR) Q505 BZ510011 TC3T029090 TRANSISTOR,SILICON 2SC2909(S,T)-AA Q507 BZ510069 TCATC31980 TRANSISTOR,SILICON KTC3198-AT(Y,GR) Q508 BZ510077 TAAT012714 TRANSISTOR,SILICON KTA1271_Y-AT Q509 BZ510069 TCATC31980 TRANSISTOR,SILICON KTC3198-AT(Y,GR) Q512 BZ510004 TA3T016240 TRANSISTOR,SILICON...
  • Page 44 ELECTRICAL REPLACEMENT PARTS LIST (FOR CANADA) Location No. TSB P/N Reference No. Description MISCELLANEOUS B403 BZ310129 024HT03564 CORE,BEADS W4BRH3.5X6X1.0 B405 BZ310129 024HT03564 CORE,BEADS W4BRH3.5X6X1.0 B501 BZ310045 024AT03481 CORE,BEADS BL02RN1-R62T2 B504 BZ310121 024HT03553 CORE,BEADS W5RH3.5X5X1.0 BT001 AE000012 1412004008 BATTERY,MANGAN R03(AB)E_2P_G BT002 AE000012 1412004008 BATTERY,MANGAN...
  • Page 45 TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...

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