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Toshiba 14AF41C Service Manual

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FILE NO. 050-200107
SERVICE MANUAL
COLOR TELEVISION
14AF41C

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  Summary of Contents for Toshiba 14AF41C

  • Page 1 FILE NO. 050-200107 SERVICE MANUAL COLOR TELEVISION 14AF41C...
  • 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: General Specifications

    GENERAL SPECIFICATIONS CRT Size / Visual Size 14 inch / 357mmV System CRT Type Flat Deflection degree Magnetic Field BV/BH +0.45G/0.18G Color System NTSC Speaker 2 Speaker Position Front Side Size 1.6 x 2.8 Inch Impedance Sound Output 2.5+2.5 W 10%(Typical) 2.0+2.0 W NTSC3.58+4.43 /PAL60Hz...
  • Page 4 G-11 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 Channel Lock Just Clock Function Game Position CH Label VM Circuit Full OSD Premiere Comb Filter Lines...
  • Page 5 GENERAL SPECIFICATIONS G-12 Accessories Owner's Manual Language English / French 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 Station List Important Safey Instructions Dew/AHC Caution Sheet AC Plug Adapter...
  • Page 6: 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 7 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 8 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 9: 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 10: Electrical Adjustments

    ELECTRICAL ADJUSTMENTS BEFORE MAKING ELECTRICAL 2. BASIC ADJUSTMENTS ADJUSTMENTS 2-1: CONSTANT VOLTAGE Read and perform these adjustments when repairing the Set condition is AV MODE without signal. circuits or replacing electrical parts or PCB assemblies. Connect the digital voltmeter to TP002. Adjust the VR502 until the digital voltmeter is 115 ±...
  • Page 11 ELECTRICAL ADJUSTMENTS 2-7: HORIZONTAL SIZE 2-12: CORNER CORR TOP NOTE: Adjust after performing adjustments in section 2-6. Receive the crosshatch signal from the Pattern Generator. Receive the monoscope pattern. Using the remote control, set the brightness and Using the remote control, set the brightness and contrast to normal position.
  • Page 12 ELECTRICAL ADJUSTMENTS 2-16: SEPARATION 1, 2 2-19: SUB TINT/SUB COLOR Receive the stereo signal (L=2KHz, R=400Hz). Receive the color bar pattern. (RF Input) Connect the AC voltmeter to AUDIO OUT JACK though Connect the oscilloscope to TP806. stereo filter (L=400Hz, R=2KHz). Activate the adjustment mode display of Fig.
  • Page 13: Purity And Convergence

    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 14: Major Components Location Guide

    MAJOR COMPONENTS LOCATION GUIDE VR502 T501 TP002 TP001 FB401 J702 FOCUS VOLUME SCREEN VOLUME MAIN PCB J801 TP804 TP806 CRT PCB...
  • Page 15: Block Diagram

    BLOCK DIAGRAM SPEAKER SPEAKER SP351 SP352 TU001 RESET IC MICON IC IC103 PST600C IC101 OEC7054A REG + 5V HEAD IC 503 PHONE JACK KIA7805API AT+5V MEMORY IC SOUND AMP IC IC199 S-24C08ADPA-01 IC353 REG + 9V AN5276 IC 502 YUV IN KIA7809API P.CON+9V CHROMA IC...
  • Page 16 PRINTED CIRCUIT BOARDS MAIN (INSERTED PARTS) SOLDER SIDE CD801 CP801A C430 W143 CP101 Q404 J702 C427 R441 J701 J703 J704 J705 CD701A C413 C428 L703 C715 W110 C747 W033 HS401 W845 C745 C739 C743 TP003 C738 C744 IC701 C740 C004 L401 C002 W057...
  • Page 17 PRINTED CIRCUIT BOARDS MAIN (CHIP MOUNTED PARTS) SOLDER SIDE C120 Q705 Q704 R104 R322 R110 Q506 C336_1 R916 R319 W860 R510 R125 C334 C967 C928 R324 R119 R108 R121 C330_1 C333 C966 C926 R504 R327 R525 R905 Q101 R904 IC902 Q104 Q102 R140...
  • Page 18: C1511

    PRINTED CIRCUIT BOARDS COMB (CHIP MOUNTED PARTS) (INSERTED PARTS) SOLDER SIDE SOLDER SIDE SOLDER SIDE TP804 R804 CP1501 Q810 L1505 C1532 D801 R1510 Q1504 R809 R1517 R813 R810 L1503 R1516 W810 R1509 W002 C1520 L1502 C1521 W809 Q1502 Q1503 IC1501 C813 CP804 R1513...
  • Page 19: Buffer

    MICON/TUNER SCHEMATIC DIAGRAM (MAIN PCB) OS101 TU001 TECC1040PG32D PIC-28143SY-2 C007_1 0.01 F TP001 H-BUFFER FROM/TO CHROMA/IF Q102 C003 R.OUT 2SC2412K RED LED V-BUFFER ON TIMER/POWER ON Q101 D109 2SC2412K R139 MICON IC OSD_R SLR-342VCT32 IC101 OEC7054A 1K 1/4W OSD_G R123 H SYNC OSD R OSD_B...
  • Page 20: From/To Av

    CHROMA/IF SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO AV S810Y C.OUT 6.01 S802Y S810X R639 0.23 SWITCHING Y.OUT FROM/TO MICON/TUNER Q605 TUNER_VIDEO W842 DTC114EKA R214 SYNC_OUT W840 AUDIO BUFFER C213 OSD_B Q201 FROM/TO AV 2SC2412K OSD_G R608 C615 270 1/4W OSD_R CD701B CH243001 OSD_BLK C212...
  • Page 21 DEFLECTION SCHEMATIC DIAGRAM (MAIN PCB) V.OUTPUT IC IC401 AN5522 THERMAL PROTECTION PUMP UP 25.0 12.0 25.0 R407 5.6K 1/4W BUFFER BUFFER Q401 C411 Q403 2SA1015Y R414 2SA1015Y 500V R401 FROM/TO DY 27K +-1% R417 33K CP401 V801 L401 B06B-DVS A36LTN194X81 R423 ELC16B501EN 1 2W...
  • Page 22: Power Schematic Diagram

    POWER SCHEMATIC DIAGRAM (MAIN PCB) 6.3A 125V CAUTION: FOR CONTINUED PROTECTION AGAINST FIRE HAZARD, REPLACE ONLY WITH THE SAME TYPE FUSE 6.3A 125V(F501) ATTENTION: POUR UNE PROTECTION CONTINUE LES RISQUES D’INCEIE N’UTILISER QUE DES FUSIBLE DE MEME TYPE 6.3A 125V(F501) RELAY DRIVE D516 Q504...
  • Page 23 SOUND SCHEMATIC DIAGRAM (MAIN PCB) FROM AV R314 AUDIO_R 1.5K R324 C334 AUDIO_L 1.8K 0.033 B C331_1 R326 0.022 C332 100 1/4W R328 0.47 1.8K TONE 136K AMP1 I2C BUS INTERFACE SIMAMP1 VOLAMP1 6.5K 6.5K 6.5K VOLAMP2 CONTROL SIMAMP2 6.5K LOGIC TONE 136K...
  • Page 24: 6035B-06Z002-T

    AV SCHEMATIC DIAGRAM (MAIN PCB) FROM/TO CHROMA/IF CD701A CH243001 YUV_IN(REAR) J704 JPJ4311-011852 A/V_OUT(REAR) J705 JPJ4312-01-432 FROM POWER L703 P.CON+9V 47uH GND_SIGNAL LINE1(REAR) C713 R751 J701 P.CON+5V_W/B JPJ4312-01-432 C714 R752 C715 R755 C705 BUFFER Q709 KANP 2SA1037AK LINE2(REAR) J703 JPJ4312-01-432 FROM/TO CHROMA/IF C785 TUNER_AUDIO_L C784...
  • Page 25 CRT SCHEMATIC DIAGRAM (CRT PCB) CRT BLOCK TP804 R828 2.7K 1/4W RED AMP Q801 123.5 R813 2SC2621 D801 1SS133 RED AMP R801 Q810 2SC1740SP 100 1/4W R810 C813 1.8K 0.0022 R816 W809 W810 220 1/4W TP805 R829 2.7K 1/4W GREEN AMP Q802 123.9 2SC2621...
  • Page 26: Table Of Contents

    DIGITAL COMB FILTER SCHEMATIC DIAGRAM (COMB PCB) BUFFER C1525_1 L1506 R1511 Q1504 2SC2412K C1511 22uH 0305 0.47 L1503 L1504 100uH 0305 820uH C1506 FROM/TO AV 0.01 B CP1501 6035B-06Z002-T MONITOR V.OUT Y IN C IN P.CON+5V L1505 150uH 0305 BUFFER Q1502 2SA1037AK C1501...
  • Page 27 WAVEFORMS MICON/TUNER 1 1V 0.1µs/div 1V 20µs/div 11 0.5V 20µs/div 2 1V 1µs/div 7 1V 20µs/div 12 1V 2µs/div 0.5V 10ms/div 3 1V 50µs/div 13 1V 20µs/div 4 1V 0.1ms/div 9 1V 50µs/div 14 2V 20µs/div CHROMA/IF 10 2V 20µs/div 5 1V 50µs/div 15 2V 20µs/div NOTE:...
  • Page 28 WAVEFORMS DEFLECTION 16 2V 5ms/div 21 200V 50µs/div 26 5V 2ms/div SOUND 27 5V 2ms/div 22 2V 5ms/div 17 20V 5ms/div 18 10V 10ms/div 23 2V 5ms/div 28 200mV 20µs/div 19 20V 20µs/div 24 2V 5ms/div 29 200mV 20µs/div 20 2V 20µs/div 25 2V 5ms/div 30 2V 20µs/div NOTE:...
  • Page 29: Digital Comb Filter

    WAVEFORMS 31 1V 50µs/div 36 1V 5ms/div 37 50V 20µs/div 32 2V 5ms/div 33 2V 5ms/div 38 50V 20µs/div DIGITAL COMB FILTER 34 0.5V 20µs/div 39 50V 20µs/div 35 1V 20µs/div 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 J801 PCB110 (CRT PCB) PCB060 FB401 (VM COIL PCB) L503 TU001 V801 PCB010 (MAIN PCB) PCB330 (COMB PCB) SP352 SP351...
  • Page 31: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description AD300713 A3J703I720 CABINET,FRONT ASSY AD300134 800WQ00039 FELT SHEET BZ710039 8995034000 CORD CLIP UL CO. AD300135 769WSA0011 WASHER CRT T=0.5 AD300626 701WPJB281 CABINET,FRONT AD300627 713WPA0116 GUIDE,REMOCON AD300628 713WPA0117 GLASS,LED AD300847 735WPAA367 BUTTON,BASE AD300848...
  • Page 32: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST Location No. USA-TOSHIBA Reference No. Description RESISTORS ! R001 BZ210008 R3X181273J R,METAL OXIDE 27K OHM 1W ! R410 AD300420 R5X2CE332J R,CEMENT 3.3K OHM 7W ! R411 AD300032 R6558AR39J R,FUSE 0.39 OHM 2W R416 AD300040 R3X18A2R2J R,METAL OXIDE 2.2 OHM 2W...
  • Page 33 ELECTRICAL REPLACEMENT PARTS LIST Location No. USA-TOSHIBA Reference No. Description DIODES ! D406 AD300071 D97U01101B DIODE,ZENER MTZJ11B T-77 ! D407 BZ410063 D2WTAU02A0 DIODE,SILICON AU02A-EIC ! D408 AD300074 D2BFRS4FS0 DIODE,SILICON RS-4FS ! D409 AD300073 D2BFRU4AM0 DIODE,SILICON RU-4AM ! D411 BZ410063 D2WTAU02A0...
  • Page 34 ELECTRICAL REPLACEMENT PARTS LIST Location No. USA-TOSHIBA Reference No. Description TRANSISTORS ! Q507 BZ510012 TC5T018154 TRANSISTOR,SILICON 2SC1815Y(TPE2) ! Q508 AD300611 TAAT01273Y TRANSISTOR,SILICON KTA1273_Y Q509 BZ510071 TNAAB05003 COMPOUND TRANSISTOR KRC102RTK ! Q510 BZ510031 TD3T007340 TRANSISTOR,SILICON 2SD734(E,F)-AA Q604 BZ510022 TNYJJ05001 COMPOUND TRANSISTOR...
  • Page 35 ELECTRICAL REPLACEMENT PARTS LIST Location No. USA-TOSHIBA Reference No. Description MISCELLANEOUS B501 BZ310045 024AT03481 CORE,BEADS BL02RN1-R62T2 B502 BZ310015 024AT03482 CORE,BEADS BL02RN2-R62T4 B504 BZ310016 024AT03655 CORE,BEADS BL01RN1-A63T6 B505 BZ310015 024AT03482 CORE,BEADS BL02RN2-R62T4 CD351 AD300620 06CH14396A CORD,CONNECTOR CH14396A ! CD501 BZ614053 120R614909...
  • Page 36 TOSHIBA OF CANADA LTD. HEAD OFFICE / 191 McNABB STREET MARKHAM,ONTARIO L3R 8H2,CANADA...