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Toshiba 14N21E2 Service Manual

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TOSHIBA
SERVICE MANUAL
COLOUR TELEVISION
14N21E2
PRINTED IN UK. 2003 C

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  Summary of Contents for Toshiba 14N21E2

  • Page 1 TOSHIBA SERVICE MANUAL COLOUR TELEVISION 14N21E2 PRINTED IN UK. 2003 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 14 inch / 335.4mmV System CRT Type Normal Deflection degree Magnetic Field BV/BH +0.45G/0.18G Color System PAL/SECAM Speaker 1 Speaker Position Bottom Size 3Inch Impedance 8 ohm Sound Output 1.0 W 10%(Typical) 0.8 W DDR SECAM NTSC3.58(AV)+NTSC4.43 PAL60Hz...
  • 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 Text Langage(East/West) Language Clock Set On/OffTimer Set On Timer Set Pin Code Registration Panel Lock...
  • 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 TOPtext 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 , On Timer Yes(Red , Green) Stand-by/ON On Timer Terminals...
  • 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 15 minutes. CAUTION Connect the digital voltmeter to TP502. 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) CD803 J701 CP101 CP803A VR420 FB401 VR401 R527 CP401 TP502 VR501 CRT PCB DEGAUSS COIL L503 TP023 TP024 J801 CP502 CP501 CP802B CP803B CP806 CP801 CP1001 MAIN PCB CD801 GND CRT SPEAKER AC IN...
  • Page 18: Block Diagram

    BLOCK DIAGRAM J1001 TU001 HEADPHONE_JACK CHROMA IC IC201 STV2248E IC1001 AN7511 RF_AGC_OUT CH UP AUDIO_OUT SP1001 CH DOWN FM_OUT SOUND AMP SPEAKER CVBSIN1 Q201 CF202 VOL UP PIFIN2 MICON W/T.TEXT IC SAW FILTER X601 VIF PRE. AMP IC101 OECF013B INT_CVBS_OUT 4.433619MHz PIFIN1 VOL DOWN...
  • Page 19: Printed Circuit Boards Main/Crt

    PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE HS402 L501 C504 HS501 C527 D504 FB401_1 Q501 Q401 W011 D502 C524 C507 C443 R511 C519 OS101 Q502 C505 C516_1 R501 C437 R525 R523 C423 D508 R447 D501 R502 D505 T501 D503 C503 D410 D404...
  • Page 20 PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) SOLDER SIDE R141 R1004 R606 R644 R643 R602 R140 C1004 R1006 R142 R618 R143 R645 IC199 Q403 C609 R639 R607 R115 C007 C1002 C001 IC102 R106 R005 R004 R105 C215 C201 R003 C704 C121 C104 R121...
  • Page 21 MICON/TUNER SCHEMATIC DIAGRAM (MAIN PCB) TU001 TUWRF4EG-778F2A GREEN LED DRIVE D101_1 OS101 ACCESSORY Q102 LTL-1BEFJ-002A RPM7138-H5 KRA102SRTK R104 R103 R102 R101 R137 TP003 BT001 TM101 2.2K 1.2K RED LED DRIVE CP001 R03(AB)2PXGPI ANT001 Q103 003P-2100 T4-216AP-BK 2SC2412K R132 BT002 C122 RC-GX010 R03(AB)2PXGPI R112...
  • Page 22 CHROMA/SIF/VIF/21PIN SCHEMATIC DIAGRAM (MAIN PCB) SIF BUFFER Q204 2SC2412K C629 R208 C212 0.01 B L204 L206 C204 VIF PRE.AMP SAW FILTER Q201 CF202_1 0.22uH 0.022 B KTC3881S-RTK J1981M 5.6uH R217 W824 FROM POWER VCO COIL L207 P.CON+8V 3700005 P.CON+5V 21PIN J701 0350_9982_05 R702...
  • Page 23 SOUND AMP/FRONT AV SCHEMATIC DIAGRAM (MAIN PCB) FRONT AUDIO J703 AV1-09D-4 R711 L704 10uH L714 FRONT VIDEO J702 10uH 0305 AV1-09D-3 R740 CP1001 A2502WV2-2P SPEAKER R1011 BLACK FROM/TO CHROMA/SIF/VIF/21PIN C1002 47K 1/4W SW_AUDIO_IN SP1001 FRONT_VIDEO_IN SA08A05BWC SCART_AUDIO AUDIO_OUT B1001 HEADPHONE_JACK W4BRH3.5X6X1.0 J1001 MSJ-035-12A_PC...
  • Page 24 DEFLECTION/CRT SCHEMATIC DIAGRAM (MAIN PCB) (CRT PCB) CP802A CP802B B2013H02-6P B2013H02-6P PROTECT PROTECT FROM/TO CHROMA/SIF/VIF/21PIN CUT OFF CUT OFF R.OUT R.OUT R.OUT G.OUT G.OUT G.OUT B.OUT B.OUT B.OUT V-DRIVE IC VAMP IC401 TDA8174A CP803A CP803B V_OUT B2013H02-4P B2013H02-4P ABCL H_OUT HEATER HEATER 180V...
  • Page 25 POWER SCHEMATIC DIAGRAM (MAIN PCB) R506 EMERGENCY 22K 1/4W Q504 TO SOUND AMP/FRONT AV 2SA1624 P.CON+8V 134.8 135.0 135.0 135.0 C531 D506 R521 C517 1SS133 TO DEFLECTION/CRT R528 0.001 RELAY SW Q505 R527 10K 1/4W KTC3203_Y P.CON+8V D510 RU2AM-EIC RY501 H.DRV+B ALKS321 REG.9V IC...
  • Page 26: Micon/Tuner

    WAVEFORMS MICON/TUNER CHROMA/SIF/VIF/21PIN 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 100mV NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 27: Sound Amp/Front Av

    WAVEFORMS DEFLECTION/CRT 20µs 10ms 10ms 20µs 20µs 10ms 100mV 200mV SOUND AMP/FRONT AV 10ms 20µs 200mV 20µs 20µs 20µs 1.00V 500us 20µs 20µs 500mV NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 28 WAVEFORMS 2µs 200V 20µs 20µs 20µs NOTE: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram.
  • Page 29: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW PCB110 (CRT PCB ASS'Y) PCB010 (MAIN PCB ASS'Y) 101C 101D 101B 101E 101A...
  • Page 30: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description AE002086 A3M412N720 CABINET,FRONT ASSY 101A AE001368 701UPJA131 CABINET,FRONT 101B AE000389 713UPA0020 GUIDE,REMOCON 101C AE000390 713UPA0021 GLASS,LED 101D AE000391 735UPA0097 BUTTON,BASE 101E AE000865 735UPBA021 BUTTON,FRAME AE002087 A3M412N740 CABINET,BACK ASSY AE000796 752WSAA006 PLATE,SHIELD AE000797...
  • Page 31: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description RESISTORS R001 AE000348 R002T2183J 18K OHM 1/2W R002 AE000348 R002T2183J 18K OHM 1/2W R003 AE000965 R903N8101J 100 OHM 1/8W R004 AE000965 R903N8101J 100 OHM 1/8W R005 AE000967 R903N8104J 100K OHM 1/8W R006 AE000970 R903N8153J...
  • Page 32 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description RESISTORS R420 BZ210182 R002T4103J 10K OHM 1/4W R421 BZ210118 R002T4473J 47K OHM 1/4W R422 AD301301 R002T4152J 1.5K OHM 1/4W ! R424 BZ210279 R3X181181J R,METAL OXIDE 180 OHM 1W R427 BZ210273 R002T4101J 100 OHM 1/4W...
  • Page 33 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description RESISTORS R802 BZ210201 R002T4272J 2.7K OHM 1/4W ! R803 BZ210099 R3X181153J R,METAL OXIDE 15K OHM 1W R804 BZ210201 R002T4272J 2.7K OHM 1/4W ! R805 BZ210099 R3X181153J R,METAL OXIDE 15K OHM 1W R806 BZ210201 R002T4272J...
  • Page 34 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description CAPACITORS C423 BZ110212 E5EZTD2R2M 2.2 UF 250V C435 AE000345 P235W1104J 0.1 UF 100V MKT AE000960 P232W1104J 0.1 UF 100V MMTS C437 BZ110136 P4J7F3394J CMPP 0.39 UF 250V PMS C440 AE000416 P232W1103J 0.01 UF 100V MMTS...
  • Page 35 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description CAPACITORS C1006 AE001356 E02L02221M 220 UF 16V AE001357 E02LT2221M 220 UF 16V C1007 BZ110096 E50HU2100M UF 16V C1009 AE000317 CS0RB04Q3K 0.0047UF 50V B DIODES D001 BZ410037 D97U03301B DIODE,ZENER MTZJ33B T-77 D101 AE000288 0021E9Q010...
  • Page 36 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description TRANSISTORS Q507 BZ510069 TCATC31980 TRANSISTOR,SILICON KTC3198-AT(Y,GR) Q508 BZ510022 TNYJJ05001 COMPOUND TRANSISTOR DTC114TKAT146 BZ510068 TNAAJ05003 COMPOUND TRANSISTOR KRC111SRTK Q509 BZ510022 TNYJJ05001 COMPOUND TRANSISTOR DTC114TKAT146 BZ510068 TNAAJ05003 COMPOUND TRANSISTOR KRC111SRTK Q510 BZ510021 TNYJC05001 COMPOUND TRANSISTOR...
  • Page 37 ELECTRICAL REPLACEMENT PARTS LIST Location No. TSB P/N Reference No. Description MISCELLANEOUS CP501 BZ614176 069S320419 CONNECTOR PCB SIDE A3963WV2-3PD CP502 BZ614283 069S420110 CONNECTOR PCB SIDE A1561WV2-2P CP801 BZ614016 069W01001A CONNECTOR PCB SIDE 003P-2100 CP1001 BZ614365 069S120419 CONNECTOR PCB SIDE A2502WV2-2P CP802A BZ614333 067U006049...
  • Page 38 TOSHIBA Information Systems (UK) Ltd Consumer Products Division, European Service Centre, Admiralty Way, Camberley, Surrey. GU15 3DT...

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