Toshiba 15V31B Service Manual
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Toshiba 15V31B Service Manual

Toshiba 15V31B Service Manual

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TOSHIBA
SERVICE MANUAL
COLOUR TELEVISION
15V31B
PRINTED IN UK. 2002 C

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Summary of Contents for Toshiba 15V31B

  • Page 1 TOSHIBA SERVICE MANUAL COLOUR TELEVISION 15V31B PRINTED IN UK. 2002 C...

  • 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

    CONTENTS SERVICING NOTICES ON CHECKING ...................... A1-1 HOW TO ORDER PARTS ........................... A1-1 IMPORTANT ..............................A1-1 CONTENTS ..............................A2-1 GENERAL SPECIFICATIONS ........................A3-1~A3-5 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 15 inch / 357mmV System CRT Type Flat Deflection degree Magnetic Field BV/BH +0.45G/0.18G Color System Speaker 1 Speaker Position Front Size 1.5 x2.7 Inch Impedance Sound Output 10%(Typical) DDR SECAM NTSC3.58(AV)+NTSC4.43 PAL60Hz Tuning Broadcasting System U.K.
  • Page 5 GENERAL SPECIFICATIONS On Screen Menu Display Menu Type Character Picture Contrast Brightness Colour Tint (NTSC Only) Sharpness Audio Bass Treble Balance BBE On/Off Stable Sound On/Off CH Tuning Manual Auto CH MAPPING CH Allocation Language Clock Set On/OffTimer Set On Timer Set Pin Code Registration Panel Lock Nicam Auto Off...
  • Page 6 GENERAL SPECIFICATIONS G-10 Remote Unit RC-GX Control Glow in Dark Remocon Format Custom Code 40-BF h Power Source Voltage(D.C) UM size x pcs UM-4 x 2 pcs Total Keys 34 Keys Keys Power 1/Rename 2/Move Volume Up / + Volume Down / - Previous Select Picture Menu...
  • Page 7 GENERAL SPECIFICATIONS G-11 Features Auto Degauss Auto Shut Off Canal+ CATV Anti-theft(Back Up 30 Min.) Memory(Last CH) Memory(Last Volume) Auto Search CH Allocation CH MAPPING Just Clock Function Game Position CH Label VM Circuit Full OSD Noise Blue Back T'Text Text type Fastext Text Language...
  • Page 8 GENERAL SPECIFICATIONS G-13 Interface Switch Front Power (Tact Sw) 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 Stand-by/ON Yes(Red) On Timer Yes(Green) Terminals Front Video Input...

  • Page 9: 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 10: 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 11 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 12: 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 2 seconds. Remocon Key Operations Set Key Reset the user setting items (PICTURE, VOLUME and LANGUAGE) to the initial state VOL.

  • Page 13: 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 Connect the digital voltmeter to TP501. Set condition is AV MODE without signal.
  • Page 14 ELECTRICAL ADJUSTMENTS 2-6: FOCUS 2-10: BRIGHT CENT Receive a 70dB monoscope pattern. Receive the PAL black pattern*. (RF Input) Turn the Focus Volume fully counterclockwise once. Using the remote control, set the brightness and Adjust the Focus Volume until picture is distinct. contrast to normal position.
  • Page 15 ELECTRICAL ADJUSTMENTS 2-13: TINT Receive the NTSC color bar pattern. (Audio Video Input) Using the remote control, set the brightness and contrast to normal position. Connect the oscilloscope to TP024. Activate the adjustment mode display of Fig. 1-1 and press the channel button (20) on the remote control to select "TINT".
  • Page 16 ELECTRICAL ADJUSTMENTS 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. minutes before performing the following adjustments.
  • Page 17 ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CRT PCB TP024 TP022 CP806 J801 CP802B CP803B VR420 J701 VR401 FB401 CP401 CD802 TP501 R521 TP001 CP802A AC IN DEGAUSS COIL SPEAKER CD501 VR501 CP502 CP1002 CP501 J702 J703 J704 OS101 MAIN PCB...

  • Page 18: Block Diagram

    BLOCK DIAGRAM CH UP TU001 MICON W/T.TEXT IC CH DOWN IC101 OECF012A Q102 SCL SDA VOL UP LED DRIVE ON_TIMER Q103 KEY_IN VOL DOWN LED DRIVE STANDBY LED ON TIMER P.CON+5V D103 STAND BY/P.ON SDA 19 MEMORY IC CHROMA IC D101 AVDD1 IC199...

  • Page 19: Printed Circuit Boards Main/Crt

    PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE CP101 VR420 R430 W112 L706 C408_1 R407 W861 W833 R428 J701_1 L707 L704 L711 W804 W115 W016 R713 D712 R715 D410 R716 R714 D405 W012 W027 C412 W033 D527 R703 R412 R409 W114 W013 W071...
  • Page 20 PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) SOLDER SIDE R132 Q703 R137 Q103 Q102 R738 R126 C736 R102 R103 R101 R104 R107 R603 C140 C109 C108 R605 R816 Q601 C102 C112 R811 W853 C111_1 C101 C104 C132 R148 IC102 R512 C139_1 C509 IC199...
  • Page 21 MICON/TUNER SCHEMATIC DIAGRAM (MAIN PCB) TU001 TUWRF4EK-778F2A OS101 ON TIMER RPM7138-H5 D103 R137 ACCESSORY R104 R103 R102 R101 LTL-1CHGE-002A 2.2K 1.2K LED DRIVE STAND BY/P.ON UM-4 LED DRIVE GREEN Q103 D101 CP001 BT001 Q102 2SA1037AK R132 003P-2100 2SA1037AK R03(AB)2PXGPI C122 SLR-342VCT32 UM-4 TM101...
  • Page 22 IF/CHROMA SCHEMATIC DIAGRAM (MAIN PCB) TO SOUND AMP SIF BUFFER W823 Q204 MONO_A_IN 2SC2412K R206 L206 VIF PRE.AMP C204 Q201 L204 SAW FILTER 0.27uH 0.001 B KTC3881S-RTK CF202_1 15uH R217 J1951M FROM/TO 21PIN/AV SW CF201 C621 TPSRA6M00B00-A0 MONO_A_OUT1 TUNER_V_OUT L202 3700005 EXT_A_IN SCART_V_IN1...
  • Page 23 21PIN/AV SW SCHEMATIC DIAGRAM (MAIN PCB) L713 22uH C742 L717 10uH FROM SOUND AMP FRONT_A_IN_L FRONT_V_IN3 C741 W824 W836 FROM/TO MICON/TUNER FORTHD_VCR_1 FROM/TO IF/CHROMA SCART_V_IN2/Y EXT_A_IN BUFFER SCART_V_IN1 R703 Q702 21PIN MONO_A_OUT1 2SC2412K J701_1 1/4W 21_B 0350_9982_05 21_G L711 21_R 22uH VIDEO IN VIDEO IN...
  • Page 24 SOUND AMP SCHEMATIC DIAGRAM (MAIN PCB) TO 21PIN/AV SW FRONT_A_IN_L FRONT_V_IN3 SOUND AMP IC IC1002 AN5276 ATT.CONT. ATT. FRONT VIDEO RIPPLE J703 FILTER HTJ-032-03AY STAND MUTE 20.5 10.3 21.7 10.3 R707 100 1/2W FRONT AUDIO L J704 FROM IF/CHROMA HTJ-032-03AW C1003 R1004 C736...
  • Page 25 DEFLECTION/CRT SCHEMATIC DIAGRAM (MAIN PCB) CP802A CP802B B2013H02-6P B2013H02-6P FROM/TO IF/CHROMA R602 CUT OFF CUT OFF 560 1/4W B.OUT B.OUT B.OUT R.OUT R.OUT R.OUT G.OUT G.OUT G.OUT PROTECT PROTECT V-DRIVE IC IC401 TDA8174A VAMP PROTECT CP803A V_OUT CP803B Q403 B2013H02-4P B2013H02-4P ABCL DTC114EKA...
  • Page 26 POWER SCHEMATIC DIAGRAM (MAIN PCB) 3A 125V R543 ICP502 D526 FE201-6L49 0.39 3W 20P_3000 R521 D520 30DF6-FC 0.82 D506 C517_1 1SS133 R524 11.5 0.0012 RELAY SW 47K 1/4W C503_1 Q505 KTC3203_Y 100V EMERGENCY Q509 TO DEFLECTION/CRT 2SA1624 H.DRV+B P.CON+8V RY501 ALKS321 31.9 21.9...

  • Page 27: Micon/Tuner

    WAVEFORMS MICON/TUNER IF/CHROMA 50µs 20µs 0.5µs 100mV 0.5V 10ms 50µs 100mV 200mV 20µs 20µs 50µs 0.5V 0.2ms 20µs 20µs 50µs 0.2ms 20µs 100mV NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 28: Deflection/Crt

    WAVEFORMS 20µs 20µs 20µs 100mV 20µs 20µs 200mV 20µs 10ms 100mV 200mV DEFLECTION/CRT 20µs 20µs 10ms 200mV 21PIN/AV SW 10ms 20µs 20µs NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 29 WAVEFORMS 10ms 20µs 20µs 20µs SOUND AMP 20µs 0.5V 0.2ms 2µs 200V 20µs NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 30: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW PCB110 (CRT PCB ASS'Y) 101G PCB010 101F 101E 101B (MAIN PCB ASS'Y) 101H 101C 101D 101A...

  • Page 31: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST Location Part Number Description AE001926 A3N704C720 CABINET,FRONT ASSY 101A AE001927 701WPJC306 CABINET,FRONT 101B AE001928 711WPAA098 PLATE,FRONT 101C AE001929 713WPAA116 GLASS,LED 101D AE000539 723549A016 BADGE,BRAND 101E AE001930 735WPBA782 BUTTON,FRAME 101F AE001931 735WPBA783 BUTTON,POWER 101G AE001932 743WKA0047 SPRING,BUTTON 101H AE000003 800WQ00045...

  • Page 32: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST Location Part Number Description RESISTORS R003 AE000356 R002T4271J 270 OHM 1/4W R004 AE000356 R002T4271J 270 OHM 1/4W R005 AE000499 R801R7823J 82K OHM 1/10W R006 AE000371 R801R7153J 15K OHM 1/10W R007 AE000385 R801R7750J OHM 1/10W R101 AE000380 R801R7391J 390 OHM 1/10W R102...
  • Page 33 ELECTRICAL REPLACEMENT PARTS LIST Location Part Number Description RESISTORS R426 AE000353 R002T2471J 470 OHM 1/2W R427 AE000367 R801R7101J 100 OHM 1/10W R428 BZ210150 R002T2010J OHM 1/2W R430 BZ210164 R002T4104J 100K OHM 1/4W R446 AE000353 R002T2471J 470 OHM 1/2W ! R501 BZ210206 R002T2155J 1.5M OHM 1/2W...
  • Page 34 ELECTRICAL REPLACEMENT PARTS LIST Location Part Number Description RESISTORS R725 AE000934 R002T2391J 390 OHM 1/2W R726 AD301003 R801R7102J OHM 1/10W R727 AE000368 R801R7104J 100K OHM 1/10W R728 AE000368 R801R7104J 100K OHM 1/10W R736 AD301728 R801R7103J 10K OHM 1/10W R737 BZ210074 R801R7563J 56K OHM 1/10W R738...
  • Page 35 ELECTRICAL REPLACEMENT PARTS LIST Location Part Number Description CAPACITORS C218 AE000316 CS0RB04H4K 0.022 UF 50V B C220 BZ110042 E02LU1471M 470 UF 10V C221 AE000311 CS0RB0315K 0.1 UF 25V B C403 BZ110149 E02LT4471M 470 UF 35V C404 BZ110180 E02LTD2R2M 2.2 UF 250V C407 AE000345 P235W1104J...
  • Page 36 ELECTRICAL REPLACEMENT PARTS LIST Location Part Number Description CAPACITORS C725 AE000336 E02LU1101M 100 UF 10V C726 AE000325 CS0RCH4Q2J 470 PF 50V CH C727 AE000325 CS0RCH4Q2J 470 PF 50V CH C731 AE000312 CS0RB0414K 0.01 UF 50V B C733 AE000332 E00NU2100M UF 16 V C736 BZ110278 CS0RB0216K...
  • Page 37 ELECTRICAL REPLACEMENT PARTS LIST Location Part Number Description IC102 AD301641 I9UF032310 PST3231NR IC199 BZ611124 I5HJ004BF0 S-24C04BFJ-TB IC201 AE000034 I0WDE2246E STV2246E ! IC401 BZ611081 I0WTD81740 TDA8174A IC502 BZ611089 I1KA98R09A KIA78R09API IC503 AE000475 I1KA98R060 KIA278R06PI ! IC506 BZ410088 0002E00610 PHOTO COUPLER LTV-817M-VB IC701 AD301988 I0UF015010...
  • Page 38 ELECTRICAL REPLACEMENT PARTS LIST Location Part Number Description VARIABLE RESISTORS VR401 BZ210218 V1K63H3BTE VOLUME,SEMI FIXED NVG6TLTAB222 VR420 AE000038 V1K62Q2BT8 VOLUME,SEMI FIXED NVG6THTB471 VR501 BZ210128 V1163H3BTC VOLUME,SEMI FIXED EVNCYAA03BE3 P.C.BOARD ASSEMBLIES PCB010 AE001922 A3N704C010K PCB ASS'Y TMC572B PCB110 AE001923 A3N704C110K PCB ASS'Y TCC433B MISCELLANEOUS ANT001...
  • Page 39 TOSHIBA Information Systems (UK) Ltd Consumer Products Division, European Service Centre, Admiralty Way, Camberley, Surrey. GU15 3DT...

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