Toshiba 27AF43 Service Manual
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Toshiba 27AF43 Service Manual

Toshiba 27AF43 Service Manual

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FILE NO. 050-200315
SERVICE MANUAL
COLOR TELEVISION
27AF43
DOCUMENT CREATED IN JAPAN, May, 2003

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Summary of Contents for Toshiba 27AF43

  • Page 1 FILE NO. 050-200315 SERVICE MANUAL COLOR TELEVISION 27AF43 DOCUMENT CREATED IN JAPAN, May, 2003...

  • 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~A3-10 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 (FOR USA) CRT Size / Visual Size 27 inch / 676.6mmV System CRT Type Flat Deflection degree Magnetic Field BV/BH +0.45G/0.18G Color System NTSC Speaker 2 Speaker Position Front Side Size 1.8 x 3.9 Inch Impedance Sound Output 5.0+5.0 W 10%(Typical) 4.0+4.0 W...
  • Page 5 GENERAL SPECIFICATIONS (FOR USA) On Screen Menu Display Menu Type Icon Picture Contrast Brightness Color Tint Sharpness Sound Bass Treble Balance BBE On/Off Stable Sound On/Off Surround On/Off Set Up TV/CATV Auto CH Memory Add/ Delete Option Language CH Label Favorite CH V-Chip Lock...
  • Page 6 GENERAL SPECIFICATIONS (FOR USA) G-10 Remote Unit RC-GF 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 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 Lines Auto CH Memory Hotel Lock...
  • Page 8 GENERAL SPECIFICATIONS (FOR USA) 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 = VIDEO3 Audio Input = VIDEO3 RCA x 2...
  • Page 9 GENERAL SPECIFICATIONS (FOR CANADA) CRT Size / Visual Size 27 inch / 676.6mmV System CRT Type Flat Deflection degree Magnetic Field BV/BH +0.45G/0.18G Color System NTSC Speaker 2 Speaker Position Front Side Size 1.8 x 3.9 Inch Impedance Sound Output 5.0+5.0 W 10%(Typical) 4.0+4.0 W...
  • Page 10 GENERAL SPECIFICATIONS (FOR CANADA) On Screen Menu Display Menu Type Icon Picture Contrast Brightness Color Tint Sharpness Sound Bass Treble Balance BBE On/Off Stable Sound On/Off Surround On/Off Set Up TV/CATV Auto CH Memory Add/ Delete Option Language CH Label Favorite CH V-Chip Lock...
  • Page 11 GENERAL SPECIFICATIONS (FOR CANADA) G-10 Remote Unit RC-GF 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 12 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 Lines Auto CH Memory Hotel Lock...
  • Page 13 GENERAL SPECIFICATIONS (FOR CANADA) 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 = VIDEO3 Audio Input = VIDEO3 RCA x 2...

  • Page 14: 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 15: 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 16 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 17: 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 18: 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 Set condition is AV MODE without signal. •...
  • Page 19 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 20 ELECTRICAL ADJUSTMENTS 2-14: BRIGHT CENT Receive the monoscope pattern. (RF Input) Using the remote control, set the brightness and contrast to normal position. Activate the adjustment mode display of Fig. 1-1 and press the channel button (16) on the remote control to select "BRI CENT".
  • Page 21 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 22 ELECTRICAL ADJUSTMENTS 4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) CRT PCB CP804 CP803 CD852 CP852 J801 CP852B VM COIL PCB CP802B CP801B CP851B CD801 CD851 CD802 CP801A J702 CP101 J708 J704 J703 J701 FB401 CP401 TP003 VR401 W003 VR502 CP851A CP802A CD1001...

  • Page 23: Block Diagrams

    BLOCK DIAGRAM A/V OUT J708 COMB FILTER IC Q852, Q583 Q854 Q855~ Q859 CHROMA IC IC1501 LA76600M-TLM IC601 M61283FP BUFFER BUFFER VM COIL Q610 Q613 C OUT FB401 Y OUT Y IN VIDEO LINE OUT SVM OFF DELAYDE Y OUT J801 Q603, Q614, Q605 Q803, Q812...

  • Page 24: Printed Circuit Boards Main

    PRINTED CIRCUIT BOARDS MAIN (INSERTED PARTS) SOLDER SIDE C427 CP101 CP801A B401 D411 J702 L403 J703 J704 J701 J708 D701 D407 D405 D608 D704 D703 R459_2 W006 D705 R432 W134 D702 C421_1 W062 W061 W060 W132 R710 W131 C425 W819 W058 W057 R439...
  • Page 25 PRINTED CIRCUIT BOARDS MAIN (CHIP MOUNTED PARTS) SOLDER SIDE Q101 R109 IC199_1 R724 R101 C719 C128 C720 R112 R113 R907 C312 C303 C102 C104 IC302 IC902 C115 C911 C301 R136 C323 IC101 R906 C917 R125 R128 Q902 IC301 R137 R150 C106 Q901 C913...

  • Page 26: Crt/Vm Coil

    PRINTED CIRCUIT BOARDS CRT/VM COIL SOLDER SIDE D809 L801 TP806 D807 R808 Q810 TP804 W808 W822 R804 W821 R809 R812 TP805 R820 R806 D808 W807 Q853 Q812 W007 Q811 C805 R819 R814 Q852 R859 Q854 C857 W806 D855 R872 R877 W802 Q857 CP803...

  • Page 27: Micon

    MICON SCHEMATIC DIAGRAM (MAIN PCB) ACCESSORY OS101 RPM7138-H5 BT001 R03(AB)E_2P_G TEST POINT Vout LED SW CP101 TM101 BT002 Q101 R109 173979-7 R25-1911 R03(AB)E_2P_G KTC3875S_Y_RTK I2C_SCL I2C_SDA R101 I2C_OFF R103 R106 AUDIO L AUDIO R 2.7K R130 R150 CLAMP SW Q103 47K 1/4W KTC3875S_Y_RTK FROM/TO CHROMA...

  • Page 28: Chroma

    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 29 DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO DY V.OUTPUT IC IC401 LA78041 CP401 V801 B06B-DVS THERMAL PROTECTION A68LXZ696X04 PUMP UP L402_1 25.0 12.0 25.0 R407 ELH5L4132N 1.2K R439 TO CRT/SVM 1K 1W C425 CD803 (CP805) CP83035A 0.001 BUFFER R414 R417 BUFFER Q409 Q408 KTA1266...

  • Page 30: Power

    POWER SCHEMATIC DIAGRAM (MAIN PCB) D516 RELAY DRIVE Q504 10.9 1SS133 KTC3198 R515 10K 1/4W C516 RY501 500V 0.001 ALKS321 TO SOUND R517_1 D505 W806 SOUND+B 30DF6-FC 1 3W R541_1 DEGAUSS COIL R501 L503 P.CON+12V CP502 8R270012 1 7W 0.22 A1561WV2-2P SOUND_GND D517...

  • Page 31: Sound

    SOUND SCHEMATIC DIAGRAM (MAIN PCB) FROM TUNER/STEREO R302 SW_AUDIO_L R301 2.7K 1/4W SW_AUDIO_R 2.7K 1/4W C309 0.039 R305 C323 R307 C325 L IN L ONT 0.0033 0.033 Tone Volume 2.2K SURR Balance Control R313 Control /MUTE 1K 1/4W MODE control R IN Vref R OUT...

  • Page 32: 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 100K 1/2W R002 100K 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 33 AV SCHEMATIC DIAGRAM (MAIN PCB) YUV_IN(REAR) J704 FROM/TO CHROMA MSP-213V1-652_PBSN V_IN[YUV] U_IN[YUV] Y_IN[YUV] VIDEO_OUT VIDEO_IN2 A/V_OUT(REAR) VIDEO_IN1 J708 MSP-213V2-432_PBSN VIDEO_IN3 C711 R708 C707 R704 R702 C728 R721 220 1/4W MUTE Q711 R711 KTC3875S_Y_RTK R703 C710 MUTE BUFFER Q712 R710 Q709 2.2K KANP KTC3875S_Y_RTK...

  • Page 34: 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 IC1502 C1519 FROM MICON MM1501XNRE Vin1 Y/C_SW V.OUT Vin2 VIDEO SW(C) IC IC1503 MM1501XNRE FROM/TO CHROMA...
  • Page 35 CRT/SVM SCHEMATIC DIAGRAM (CRT PCB) TP804 PCB110 CRT BLOCK TCA391 R828 RED AMP Q801 123.5 2.7K 1/4W R813 W821 W822 W823 KTC4217 220 1/4W D801 FROM CHROMA 1SS133 CP802B (CP802A) R855 A2001WV2-7P RED AMP Q810 P.CON+8V W808 330 1/2W W820 KTC3199_Y D807 R.OUT...
  • Page 36 WAVEFORMS MICON SOUND 100µs 1.0V 5.0V 50mV 5µs 1.0V 200mV 20µs 50µs 100mV 1.0V 50µs 20µs 2.0V 1.0V 100mV DEFLECTION 20µs 200mV 200V 5.0V NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 37: Crt/Svm

    WAVEFORMS 20µs 5.0V 20µs 200mV 20µs 200mV CRT/SVM 20µs 20µs NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 38: Mechanical Exploded Views

    MECHANICAL EXPLODED VIEW 102C 102B 102A 102B PCB110 (CRT PCB ASS'Y) PCB060 (VM COIL PCB ASS'Y) PCB010 (MAIN PCB ASS'Y) 101J 101G 101D 101H 101F 101G 101J 101B 101E 101J 101I 101A 101C...

  • Page 39: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description AD302316 A3N101A720 CABINET,FRONT ASSY 101A AD302317 701WPJC130 CABINET,FRONT 101B AD302318 711WPA0189 PLATE,FRONT 101C AE001102 712WPBA050 DOOR 101D AD302320 713WPA0279 GLASS,LED 101E AD302321 7235490037 BADGE,BRAND 101F AE001103 735WPJA774 BUTTON,POWER 101G AE001104 735WPBA673 BUTTON,FRAME...

  • Page 40: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description RESISTORS ! R410 AD301344 R3X18A151J R,METAL OXIDE 150 OHM 2W ! R426 BZ210030 R4X5T4472F R,METAL 4.7K OHM 1/4W ! R434 BZ210259 R5Y2CF1R8J R,CEMENT 1.8 OHM 10W ! R436 BZ210023 R4X5T4183F R,METAL 18K OHM 1/4W...
  • Page 41 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description DIODES ! D406 BZ410021 D97U05R61B DIODE,ZENER MTZJ5.6B T-77 D407 BZ410063 D2WTAU02A0 DIODE,SILICON AU02A-EIC D408 AD302110 D2CF0715L0 DIODE,SILICON ERD07-15L50 D409 AD301980 D2CF2016L0 DIODE,SILICON FE201-6L49 D410 BZ410019 D97U03001B DIODE,ZENER MTZJ30B T-77 ! D411 BZ410063 D2WTAU02A0...
  • Page 42 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description IC1001 AD300056 I0FSP52760 AN5276 IC1501 AD301029 I03FE76600 LA76600M-TLM IC1502 AD301988 I0UF015010 MM1501XNRE IC1503 AD301988 I0UF015010 MM1501XNRE TRANSISTORS Q101 BZ510109 TCAA3875SY TRANSISTOR,SILICON KTC3875S_Y_RTK Q103 BZ510109 TCAA3875SY TRANSISTOR,SILICON KTC3875S_Y_RTK Q402 BZ510097 TCAT03227Y TRANSISTOR,SILICON KTC3227_Y-AT...
  • Page 43 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description COILS &TRANSFORMERS L1503 BZ310039 02167F220J COIL L1505 AD300613 02167F150J COIL L1508 BZ310041 02167F101J COIL 100 UH L1510 AD300613 02167F150J COIL L1511 AD300613 02167F150J COIL L1512 AD301608 0216A6220J COIL T401 AD301125 0450190161 TRANS,HORIZONTAL DRIVE...
  • Page 44 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description MISCELLANEOUS ! FB401 AD302315 043227012F TRANSFORMER,FLYBACK 3227012F FH501 BZ614005 06710T0006 HOLDER,FUSE EYF-52BC FH502 BZ614005 06710T0006 HOLDER,FUSE EYF-52BC OS101 AD301048 0773071001 REMOTE RECEIVER RPM7138-H5 ! RY501 AD300114 0560V20115 RELAY ALKS321 SP1001 BZ614381 070C546004...
  • Page 45 TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...

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