Toshiba 27AF44 Service Manual
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Toshiba 27AF44 Service Manual

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FILE NO. 050-200401

SERVICE MANUAL

COLOR TELEVISION
27AF44
DOCUMENT CREATED IN JAPAN, Feb., 2004

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Summary of Contents for Toshiba 27AF44

  • Page 1: Service Manual

    FILE NO. 050-200401 SERVICE MANUAL COLOR TELEVISION 27AF44 DOCUMENT CREATED IN JAPAN, Feb., 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~A3-5 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 / 676.0mmV 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 NTSC3.58+4.43 /PAL60Hz...
  • Page 5 GENERAL SPECIFICATIONS 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 On/Off Timer...
  • Page 6 GENERAL SPECIFICATIONS G-10 Remote Unit RC-GW 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 Lines Auto CH Memory Hotel Lock...
  • Page 8 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 = VIDEO3 Audio Input = VIDEO3 RCA x 2 Other Terminal...

  • 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 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 11 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 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 1 second. Set Key Remocon Key Operations Releasing of V-CHIP PASSWORD.

  • 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 Set condition is AV MODE without signal. •...
  • Page 14 ELECTRICAL ADJUSTMENTS 2-6: HORIZONTAL SIZE 2-11: CORNER 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 15 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 16: Purity And Convergence

    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 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 18: Block Diagram

    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 IN VIDEO LINE OUT DELAYDE Y OUT SVM OFF Y OUT J801 Q603, Q614, Q605 Q803, Q812...

  • Page 19: Printed Circuit Boards Main

    PRINTED CIRCUIT BOARDS MAIN (INSERTED PARTS) SOLDER SIDE CD801A C426 C427_1 CP801A J702 D411 J703 J704 CP101 J708 B401 J701 D608 C413_1 D405 D407 D701 D704 W861 D703 W006 D705 W134 D702 R459_2 W062 C421 W061 W132 W060 W131 R710 W058 W819 C425...
  • Page 20 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 IC101 C323 R906 C917 R125 R128 Q902 IC301 R137 R150 C106 Q901 C913...

  • Page 21: Crt/Vm Coil

    PRINTED CIRCUIT BOARDS CRT/VM COIL SOLDER SIDE L801 D809 TP806 D807 R808 Q810 TP804 W808 W822 R804 C813_1 W821 TP805 R812 R806 W890 D808 R820 W807 Q812 W007 Q811 C805 Q853 R819 R814 Q852 Q854 W806 R859 C857 C853 C854 D855 R872 R877...

  • Page 22: Micon

    MICON SCHEMATIC DIAGRAM ACCESSORY (MAIN PCB) BT001 R03(AB)E_2P_G OS101 TM101 RPM7138-WH5 BT002 R25-1943 R03(AB)E_2P_G TEST POINT Vout LED SW CP101 Q101 R109 173979-7 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 23: Deflection

    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 1/2W FROM/TO COMB/FILTER FROM/TO MICON C_V_OUT_SW P.CON+5V PROTECT Y_V_OUT_SW C641 VIDEO_OUT C IN(Y/C) Y SW OUT SW_Y_OUT P.CON+8V[A] R602 R649...
  • Page 24 DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO DY V.OUTPUT IC IC401 LA78041 CP401 V801 B06B-DVS THERMAL PROTECTION A68QCU770X66L PUMP UP L402_1 ELH5L4132N 25.0 12.0 25.0 R407 1.2K R439 1K 1W TO CRT/SVM C425 CD803 (CP805) 0.001 CU83036A BUFFER R414 R417 Q409 KTA1266 27K +-1% BUFFER...
  • Page 25 POWER SCHEMATIC DIAGRAM (MAIN PCB) D516 RELAY DRIVE Q504 10.9 1SS133 KTC3198 R515 10K 1/4W C516 500V 0.001 TO SOUND RY501 R517_1 D505 W806 ALKS321 SOUND+B 30DF6-FC R541_1 DEGAUSS COIL R501 P.CON+12V L503 CP502 8R270013 1 7W 0.22 1W A1561WV2-2P SOUND_GND D517 CP507...
  • Page 26 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 L IN L ONT R305 C323 R307 C325 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 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 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 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 C710 MUTE BUFFER Q712 R710 Q709...

  • Page 29: 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 30: Crt Block

    CRT/SVM SCHEMATIC DIAGRAM (CRT PCB) (CRT PCB) CRT BLOCK TP804 PCB110 TCA391 R828 RED AMP Q801 123.5 2.7K 1/4W W821 W822 W823 R813 KTC4217 220 1/4W SVM BLOCK D801 FROM CHROMA 1SS133 CP802B (CP802A) R855 A2001WV2-7P RED AMP Q810 P.CON+8V W808 W820 1/2W...
  • Page 31 WAVEFORMS MICON SOUND 100µs 50mV 5µs 200mV 20µs 50µs 100mV 50µs 20µs 100mV DEFLECTION 20µs 200mV 200V NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.

  • Page 32: Crt/Svm

    WAVEFORMS 20µs 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 33: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW PCB110 (CRT PCB ASS'Y) PCB060 (VM COIL PCB ASS'Y) PCB010 (MAIN PCB ASS'Y) 101B 101A...
  • Page 34 MECHANICAL EXPLODED VIEW (PACKING DIAGRAM) 131, 132, 133, 134, TM101...

  • Page 35: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description AE003013 A3N115F720K CABINET,FRONT ASSY 101A AE003014 701APJA127 CABINET,FRONT 101B AE003015 712APBA005 DOOR AE003016 A3N115F740K CABINET,BACK ASSY AE003017 722549A244 SHEET,RATING AE003018 723000C288 POP LABEL AD301425 7240001120 SHEET,CSA AE003019 769WSA0017 WASHER CRT T=1 AD300759 741WUA0021 SPRING,EARTH...

  • Page 36: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST (FOR U.S.A.) Location No. TSB P/N Reference No. Description RESISTORS ! R402 BZ210041 R635U2680J R,FUSE 68 OHM 1/2W ! R410 BZ210087 R3X18A221J R,METAL OXIDE 220 OHM 2W ! R426 BZ210030 R4X5T4472F R,METAL 4.7K OHM 1/4W ! R434 AD301972 R5X2CF5R6J R,CEMENT...
  • Page 37 ELECTRICAL REPLACEMENT PARTS LIST (FOR U.S.A.) Location No. TSB P/N Reference No. Description DIODES 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 DIODE,SILICON AU02A-EIC D414 BZ410043...
  • Page 38 ELECTRICAL REPLACEMENT PARTS LIST (FOR U.S.A.) Location No. TSB P/N Reference No. Description IC701 AD301988 I0UF015010 MM1501XNRE IC702 AD301988 I0UF015010 MM1501XNRE IC902 AD300059 I01FF58290 AN5829S IC1001 AD300056 I0FSP52760 AN5276 IC1501 AE003002 I03FE76605 LA76605M-TLM IC1502 AD301988 I0UF015010 MM1501XNRE IC1503 AD301988 I0UF015010 MM1501XNRE TRANSISTORS Q101...
  • Page 39 ELECTRICAL REPLACEMENT PARTS LIST (FOR U.S.A.) Location No. TSB P/N Reference No. Description COILS &TRANSFORMERS L804 AD300123 021673151K COIL 150 UH L901 BZ310041 02167F101J COIL 100 UH L1501 BZ310041 02167F101J COIL 100 UH L1502 BZ310039 02167F220J COIL L1503 BZ310039 02167F220J COIL L1505 AD300613...
  • Page 40 ELECTRICAL REPLACEMENT PARTS LIST (FOR U.S.A.) Location No. TSB P/N Reference No. Description MISCELLANEOUS EL001 BZ614044 124120301A EYE LET XRY20X30BD EL002 BZ614043 124116281A EYE LET XRY16X28BD ! F501 AD301046 081PC6R305 FUSE 51MS063L ! FB401 AD302315 043227012F TRANSFORMER,FLYBACK 3227012F FH501 AE002634 06710T0009 HOLDER,FUSE EYF-52BCY...
  • Page 41 ELECTRICAL REPLACEMENT PARTS LIST (FOR CND) Location No. TSB P/N Reference No. Description RESISTORS ! R402 BZ210041 R635U2680J R,FUSE 68 OHM 1/2W ! R410 BZ210087 R3X18A221J R,METAL OXIDE 220 OHM 2W ! R426 BZ210030 R4X5T4472F R,METAL 4.7K OHM 1/4W ! R434 AD301972 R5X2CF5R6J R,CEMENT...
  • Page 42 ELECTRICAL REPLACEMENT PARTS LIST (FOR CND) Location No. TSB P/N Reference No. Description DIODES 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 DIODE,SILICON AU02A-EIC D414 BZ410043...
  • Page 43 ELECTRICAL REPLACEMENT PARTS LIST (FOR CND) Location No. TSB P/N Reference No. Description IC701 AD301988 I0UF015010 MM1501XNRE IC702 AD301988 I0UF015010 MM1501XNRE IC902 AD300059 I01FF58290 AN5829S IC1001 AD300056 I0FSP52760 AN5276 IC1501 AE003002 I03FE76605 LA76605M-TLM IC1502 AD301988 I0UF015010 MM1501XNRE IC1503 AD301988 I0UF015010 MM1501XNRE TRANSISTORS Q101...
  • Page 44 ELECTRICAL REPLACEMENT PARTS LIST (FOR CND) Location No. TSB P/N Reference No. Description COILS &TRANSFORMERS L804 AD300123 021673151K COIL 150 UH L901 BZ310041 02167F101J COIL 100 UH L1501 BZ310041 02167F101J COIL 100 UH L1502 BZ310039 02167F220J COIL L1503 BZ310039 02167F220J COIL L1505 AD300613...
  • Page 45 ELECTRICAL REPLACEMENT PARTS LIST (FOR CND) Location No. TSB P/N Reference No. Description MISCELLANEOUS EL001 BZ614044 124120301A EYE LET XRY20X30BD EL002 BZ614043 124116281A EYE LET XRY16X28BD ! F501 AD301046 081PC6R305 FUSE 51MS063L ! FB401 AD302315 043227012F TRANSFORMER,FLYBACK 3227012F FH501 AE002634 06710T0009 HOLDER,FUSE EYF-52BCY...
  • Page 46 TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...

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