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Toshiba 27AF53 Service Manual

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FILE NO. 050-200314

SERVICE MANUAL

COLOR TELEVISION
27AF53
DOCUMENT CREATED IN JAPAN, May, 2003

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  • Page 1: Service Manual

    FILE NO. 050-200314 SERVICE MANUAL COLOR TELEVISION 27AF53 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~A3-5 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 / 676.6mmV 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 NTSC3.58+4.43 /PAL60Hz...
  • Page 5 GENERAL SPECIFICATIONS On Screen Menu Display Menu Type Icon Picture Contrast Brightness Color Tint Sharpness Reset Sound Bass Treble Balance BBE On/Off Stable Sound On/Off Surround On/Off Set Up Closed Caption PIP Source TV/CATV Auto CH Memory Add/ Delete Mode Color Temperature Picture Preference Option...
  • Page 6 GENERAL SPECIFICATIONS G-10 Remote Unit RC-GR Control Glow in Dark Remocon Back Light Remocon Format Toshiba Custom Code TV:40-BFh Power Source Voltage(D.C) UM size x pcs UM-3 x 2 pcs Total Keys Keys Keys Power 100 /+10 CH Up CH 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 Vertical Contour Correction Auto CH Memory...
  • 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 S 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 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 and LOCK 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: VERTICAL POSITION 2-12: E/W PARABOLA Receive the crosshatch signal from the Pattern Generator. Receive the monoscope pattern. Using the remote control, set the brightness and contrast Set the screen mode to 4:3. Using the remote control, set the brightness and contrast to normal position.
  • Page 15 ELECTRICAL ADJUSTMENTS 2-15: 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 AV PCB CD851 CD802 S792A CP801A J702 CP101 J708 J704 J703 J701 S790A S793A FB401 S791A CP401 TP003...
  • Page 18: Block Diagram

    BLOCK DIAGRAM MICON 3D-COMB IC IC101 OEC7092A IC1503 Q1503, Q1505 TC90A65F Q1507, Q1514 OS101 KEY 1 CH DOWN BUFFER 94 Cout 9 REMOCON VOL_DOWN BUFFER Yout POWER A/V SW IC Q1504, Q1506 CHROMA IC IC701 Q1508, Q1515 X.IN IC601 AN15853A Q1513 KEY 2 CH UP...
  • Page 19: Printed Circuit Boards Main

    PRINTED CIRCUIT BOARDS MAIN (INSERTED PARTS) TO AV PCB S790A S792A SOLDER SIDE S791A S793A CP801A J704 C427 CP101 J702 C410 B401 D411 R741 R752 J708 D416 D405 D608 W079 C419 W004 R751 L403 R459_2 C421 W161 W080 W085 L702 C425 D702 R439...
  • Page 20 PRINTED CIRCUIT BOARDS MAIN (CHIP MOUNTED PARTS) SOLDER SIDE R121 R101 R150 R907 R435 R431 R425 R419 R127 R440 R409 R423 IC199_1 Q101 Q605 Q103 R622 IC902 R134 R624 R115 IC302 R136 R130 R641 R114 Q603 R906 IC101 R133 R916 Q902 R132 Q901...
  • Page 21: Crt/Vm Coil/Comb/Av

    PRINTED CIRCUIT BOARDS COMB (TOP SIDE) CRT/VM COIL SOLDER SIDE SOLDER SIDE SOLDER SIDE S793 TP806 CP790 CP791 D809 W804 R808 S792 D807 Q810 R1506 TP804 C1557 C1559 C1549 Q1508 Q1506 Q1504 L790 R801 D805 C1552 C792 R1518 R1512 R790 R804 R1514 R1509...
  • Page 22: Micon

    MICON SCHEMATIC DIAGRAM (MAIN PCB) OS101 RPM7138-H5 TEST POINT Vout CP101 173979-7 I2C_SCL I2C_SDA I2C_OFF R101 R103 R106 AUDIO L AUDIO R 2.7K H_CTL FROM/TO TUNER/STEREO Q101 KTC3875S_Y_RTK C141 J_AUDIO_OUT_R J_AUDIO_OUT_L 0.001 B MICON IC IC101 OEC7092A FROM/TO SOUND CLAMP SW TV_MUTE H_CTL R150...
  • Page 23 CHROMA SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO AV V_IN[YUV] R616 U_IN[YUV] Y_IN[YUV] 150 1/2W AT 5V REG C_V_OUT_SW Q607 Y_V_OUT_SW KTC3203_Y R617 FROM/TO REGULATOR P.CON+5V R603 FSC_OUT AT+5V 330 1/2W R602 FROM/TO MICON P.CON 5V REG Q606 15 3W KTC3209_Y P.CON+5V R644 AT+5V C641...
  • Page 24 DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO DY V.OUTPUT IC V801 IC401 LA78041 CP401 A68LXZ696X04 B06B-DVS THERMAL PROTECTION L402_1 PUMP UP ELH5L4132N 25.0 12.0 25.0 R439 R407 1K 1W 1.2K C425 TO CRT BUFFER 0.001 CD803 (CP803) Q409 CP83035A BUFFER KTA1266 Q408 R414 R417...
  • Page 25: Power

    POWER SCHEMATIC DIAGRAM (MAIN PCB) D529 1SS133 C516 RELAY DRIVE Q504 D517 10.9 KTC3198 500V 0.0033 R515 FROM/TO SOUND 1SS133 R517_1 D505 10K 1/4W SOUND+B 30DF6-FC 0.22 3W D516 1SS133 P.CON+9V SOUND_GND RY501 ALKS321 R537 R504 D532 3.9K 1/4W 1SS133 CURRENT DET.
  • Page 26 SOUND SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO TUNER/STEREO R302 AUDIO_OUT_L 2.7K 1/4W R301 AUDIO_OUT_R 2.7K 1/4W C309 0.039 L IN VD L ONT R305 C323 R307 C325 0.0033 0.033 Tone Volume SURR 2.2K Balance Control R313 Control /MUTE MODE control R IN Vref R OUT R306...
  • Page 27: Tuner/Stereo

    TUNER/STEREO SCHEMATIC DIAGRAM (MAIN PCB) TU001 115-V-K015AR B FROM/TO CHROMA P.CON+5V W809 TUNER+5V P.CON+8V[B] FROM/TO POWER P.CON+B FROM/TO MICON J_AUDIO_OUT_L J_AUDIO_OUT_R C901 BUFFER Q901 KTA1504S_Y_RTK C902 BUFFER Q902 50V KA KTA1504S_Y_RTK L901 22uH0305 FROM/TO SOUND AUDIO_OUT_L AUDIO_OUT_R OUT SW IIC Decoder St.PLL Pilot Input...
  • Page 28 AV SCHEMATIC DIAGRAM (MAIN PCB) YUV_IN(REAR) J704 MSP-213V1-652_PBSN FROM/TO CHROMA V_IN[YUV] U_IN[YUV] Y_IN[YUV] C_V_OUT_SW Y_V_OUT_SW A/V_OUT(REAR) J708 MSP-213V2-432_PBSN FROM/TO TUNER/STEREO C711 R708 J_AUDIO_OUT_R C707 R704 J_AUDIO_OUT_L EXT_AUDIO_L C728 R721 MUTE EXT_AUDIO_R Q711 TUNER_VIDEO R703 R711 KTC3875S_Y_RTK MUTE 2.2K Q712 R710 KTC3875S_Y_RTK L702 47uH 0305...
  • Page 29 REGULATOR SCHEMATIC DIAGRAM (MAIN PCB) 2.5V REG Q519 KTC3209_Y 3.3V REG Q516 KTC3209_Y VOLT CURRENT CONTROL VOLTAGE CTL IC501 BA10358F-E2 Q517 12.3 KTC3875S_Y_RTK R538 VOLTAGE CTL Q518 KTC3875S_Y_RTK R529 R550 8.2K R528 FROM/TO POWER P.CON+9V UNREG+5V FROM/TO COMB/FILTER CP151 (CP1501) 6035B-12Z002-T P.CON+2.5V FROM/TO AV...
  • Page 30: Crt/Svm

    CRT/SVM SCHEMATIC DIAGRAM (CRT PCB) TP804 PCB110 CRT BLOCK TCA391 R828 RED AMP Q801 123.5 2.7K 1/4W D804 D805 D806 R813 KTC4217 1SS133 1SS133 1SS133 220 1/4W D801 FROM CHROMA 1SS133 CP802B (CP802A) A2001WV2-7P RED AMP Q810 P.CON+8V R801 W820 KTC3199_Y GND(SIGNAL) 100 1/4W...
  • Page 31 COMB/FILTER SCHEMATIC DIAGRAM (COMB PCB) C1553 L1504 0.01 B C1556 C1558 22uH C1562 0305 0.01 B 0.01 B C1506 BUFFER 0.01 B Q1511 10P CH KTA1504S_Y_RTK BUFFER C1535 C1509 L1501 BUFFER R1508 Q1513 4.9 4.9 Q1510 KTC3875S_Y_RTK 0.01 B 470 1/10W 15uH KTC3875S_Y_RTK C1536...
  • Page 32 6DB AMP SCHEMATIC DIAGRAM (AV PCB) 6dB AMP IC790 NJM2246L FROM/TO AV S790 (WHITE) S791 (RED) S792 (YELLOW) S793 (BLUE) CP790 CP791 003P-2100 003P-2100 PCB250 TECB33 NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME NOTE:THE DC VOLTAGE AT EACH PART WAS MEASURED OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE WITH THE DIGITAL TESTER WHEN THE COLOR BROADCAST WAS RECEIVED IN GOOD CONDITION AND PICTURE IS NORMAL.
  • Page 33: Waveforms

    WAVEFORMS MICON SOUND 50Ns 1.0V 500mV 50ns 1.0V 500mV 20µs 1.0V 100mV 20µs 1.0V 100mV DEFLECTION 20µs 200V 1.0V 2.0V NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 34 WAVEFORMS 10µs 2.0V 20µs 200mV 20µs 200mV CRT/SVM 10µs 10µs NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 35: Mechanical Exploded Views

    MECHANICAL EXPLODED VIEW 102C 102B 102A 102B PCB110 (CRT PCB ASS'Y) PCB060 (VM COIL PCB ASS'Y) PCB250 (AV PCB ASS'Y) PCB330 (COMB PCB ASS'Y) PCB010 (MAIN PCB ASS'Y) 101J 101G 101D 101H 101F 101G 101J 101B 101E 101J 101I 101A 101C...
  • Page 36: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description AE001141 A3N102B720 CABINET,FRONT ASSY 101A AD302377 701WPJ1214 CABINET,FRONT 101B AD302318 711WPA0189 PLATE,FRONT 101C AD302378 712WPB0151 DOOR 101D AD302320 713WPA0279 GLASS,LED 101E AD302321 7235490037 BADGE,BRAND 101F AE001142 735WPJ0236 BUTTON,POWER 101G AD302380 735WPB0268 BUTTON,FRAME...
  • Page 37: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description RESISTORS ! R410 AD300783 R3X181221J R,METAL OXIDE 220 OHM 1W ! R416 BZ210053 R002T22R2J 2.2 OHM 1/2W ! R420 AD301345 R002T22R7J 2.7 OHM 1/2W ! R426 AE000913 R4X5T6682F R,METAL 6.8K OHM 1/6W R434 AE000914...
  • Page 38 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description CAPACITORS C808 BZ110226 C0JBB07H3K 0.0022UF 2KV B C1003 AD300067 E02LF4102M 1000 UF 35V C1004 BZ110053 E02LF3102M 1000 UF 25V C1009 BZ110053 E02LF3102M 1000 UF 25V DIODES D001 BZ410019 D97U03001B DIODE,ZENER MTZJ30B T-77 D102...
  • Page 39 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description DIODES D701 BZ410066 D97U06R21B DIODE,ZENER MTZJ6.2B T-77 D702 AD300070 D97U01201B DIODE,ZENER MTZJ12B T-77 D703 AD300070 D97U01201B DIODE,ZENER MTZJ12B T-77 D704 AD300070 D97U01201B DIODE,ZENER MTZJ12B T-77 D705 BZ410006 D1VT001330 DIODE,SILICON 1SS133T-77 D706 BZ410006...
  • Page 40 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description TRANSISTORS Q607 BZ510070 TCAT032034 TRANSISTOR,SILICON KTC3203_Y-AT Q608 BZ510109 TCAA3875SY TRANSISTOR,SILICON KTC3875S_Y_RTK Q611 BZ510105 TCAT03209Y TRANSISTOR,SILICON KTC3209_Y-AT Q701 BZ510109 TCAA3875SY TRANSISTOR,SILICON KTC3875S_Y_RTK Q702 BZ510109 TCAA3875SY TRANSISTOR,SILICON KTC3875S_Y_RTK Q703 BZ510109 TCAA3875SY TRANSISTOR,SILICON KTC3875S_Y_RTK Q709...
  • Page 41 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description JACKS J705 AD300110 060G401047 RCA JACK HTJ-032-03AY J706 AD300111 060G401046 RCA JACK HTJ-032-03AW J707 AD300112 060G401039 RCA JACK HTJ-032-03AR J708 AD301038 060J431019 RCA JACK MSP-213V2-432 PBSN J709 AD300108 063Q700002 JACK YKF51-5503 ! J801...
  • Page 42 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description MISCELLANEOUS ! F501 AD301046 081PC6R305 FUSE 51MS063L ! 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...
  • Page 43 TOSHIBA CORPORATION 1-1, SHIBAURA 1-CHOME, MINATO-KU, TOKYO 105-8001, JAPAN...