Toshiba 14N21NS Service Manual
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Toshiba 14N21NS Service Manual

Toshiba 14N21NS Service Manual

Toshiba colour television service manual
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TOSHIBA
SERVICE MANUAL

COLOUR TELEVISION

14N21NS
PRINTED IN UK. 2002 C

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Summary of Contents for Toshiba 14N21NS

  • Page 1: Colour Television

    TOSHIBA SERVICE MANUAL COLOUR TELEVISION 14N21NS PRINTED IN UK. 2002 C...

  • Page 2: Servicing Notices On Checking

    SERVICING NOTICES ON CHECKING 1. KEEP THE NOTICES As for the places which need special attentions, they are indicated with the labels or seals on the cabinet, chassis and parts. Make sure to keep the indications and notices in the operation manual. 2.

  • Page 3: Table Of Contents

    SERVICING NOTICES ON CHECKING ... HOW TO ORDER PARTS ... IMPORTANT ... CONTENTS ... GENERAL SPECIFICATIONS ... DISASSEMBLY INSTRUCTIONS 1.REMOVAL OF ANODE CAP ... 2.REMOVAL AND INSTALLATION OF FLAT PACKAGE IC ... SERVICE MODE LIST ... CONFIRMATION OF HOURS USED ... WHEN REPLACING EEPROM( MEMORY) IC ...

  • Page 4: General Specifications

    GENERAL SPECIFICATIONS System Color System Speaker Sound Output DDR SECAM NTSC3.58(AV)+NTSC4.43 PAL60Hz Tuning Broadcasting System System Tuner and Receive CH Intermediate Frequency Preset CH Stereo/Dual TV Sound Tuner Sound Muting Power Power Source Power Consumption Protector Regulation Temperature Operating Humidity CRT Size / Visual Size 14 inch / 335.4mmV CRT Type...
  • Page 5 GENERAL SPECIFICATIONS On Screen Menu Display OSD Language Clock and Sleep Timer Timer Clock On Timer Off Timer Wake Up Timer Timer Back-up (at Power Off Mode) Menu Type Picture Contrast Brightness Colour Tint (NTSC Only) Sharpness Audio Bass Treble Balance BBE On/Off Stable Sound On/Off...
  • Page 6 GENERAL SPECIFICATIONS G-10 Remote Unit Control Glow in Dark Remocon Format Custom Code Power Source Total Keys Keys T'TEXT Keys 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 Just Clock Function Game Position CH Label...
  • Page 7 GENERAL SPECIFICATIONS G-12 Accessories Owner's Manual Remote Control Unit Rod Antenna Loop Antenna U/V Mixer DC Car Cord (Center+) Guarantee Card Warning Sheet Circuit Diagram Antenna Change Plug Service Facility List Important Safeguard Dew/AHC Caution Sheet AC Plug Adapter Quick Set-up Sheet Battery AC Cord AV Cord (2Pin-1Pin)
  • Page 8 GENERAL SPECIFICATIONS G-16 Carton Master Carton Content Material Dimensions W x D x H(mm) Description of Origin Gift Box Material Dimensions W x D x H(mm) Design Description of Origin Drop Test Height (cm) Container Stuffing A3-5 ---- Sets x -- x -- Double/Brown x 408 x 380...

  • Page 9: Removal Of Anode Cap

    1. REMOVAL OF ANODE CAP Read the following NOTED items before starting work. After turning the power off there might still be a potential voltage that is very dangerous. When removing the Anode Cap, make sure to discharge the Anode Cap's potential voltage.

  • Page 10: Removal And Installation Of Flat Package Ic

    REMOVAL AND INSTALLATION OF FLAT PACKAGE IC REMOVAL Put the Masking Tape (cotton tape) around the Flat Package IC to protect other parts from any damage. (Refer to Fig. 2-1.) NOTE Masking is carried out on all the parts located within 10 mm distance from IC leads.
  • Page 11 INSTALLATION Take care of the polarity of new IC and then install the new IC fitting on the printed circuit pattern. Then solder each lead on the diagonal positions of IC temporarily. (Refer to Fig. 2-5.) Soldering Iron Solder temporarily Supply the solder from the upper position of IC leads sliding to the lower position of the IC leads.

  • Page 12: 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 Set Key VOL. (-) MIN VOL.

  • Page 13: When Replacing Eeprom( Memory) Ic

    WHEN REPLACING EEPROM (MEMORY) IC If a service repair is undertaken where it has been required to change the MEMORY IC, the following steps should be taken to ensure correct data settings while making reference to TABLE 1. Note: No need setting for the position of the mark @ due to the adjustment value. CD CF Enter DATA SET mode by setting VOLUME to minimum.

  • Page 14: Electrical Adjustments

    1. ADJUSTMENT PROCEDURE Read and perform these adjustments when repairing the circuits or replacing electrical parts or PCB assemblies. CAUTION • Use an isolation transformer when performing any service on this chassis. • Before removing the anode cap, discharge electricity because it contains high voltage.
  • Page 15 2-6: FOCUS Receive an 70dB monoscope pattern. Turn the Focus Volume fully counterclockwise once. Adjust the Focus Volume until picture is distinct. 2-7: HORIZONTAL POSITION Receive the monoscope pattern from the Pattern Generator. Using the remote control, set the brightness and contrast to normal position.
  • Page 16 2-13: TINT Receive the PAL color bar pattern. (Audio Video Input) Using the remote control, set the brightness and contrast to normal position. Connect the oscilloscope to TP023. Activate the adjustment mode display of Fig. 1-1 and press the channel button (20) on the remote control to select "TINT".

  • Page 17: Purity And Convergence Adjustments

    PURITY AND CONVERGENCE ADJUSTMENTS NOTE Turn the unit on and let it warm up for at least 30 minutes before performing the following adjustments. Place the CRT surface facing east or west to reduce the terrestrial magnetism. Turn ON the unit and demagnetize with a Degauss Coil. 3-1: STATIC CONVERGENCE (ROUGH ADJUSTMENT) Tighten the screw for the magnet.

  • Page 18: Electrical Adjustment Parts Location Guide (Wiring Connection)

    4. ELECTRICAL ADJUSTMENT PARTS LOCATION GUIDE (WIRING CONNECTION) FB401 CP502 AC IN CD501 J1001 ELECTRICAL ADJUSTMENTS TP023 CP801 J801 CP802B CD802 CP802A CP401 R503 VR501 TP501 CP501 MAIN PCB CD801 R807 R803 TP022 CRT PCB J701 PH001 CP101 VR401 VR420 TP001 CP1001 SPEAKER...

  • Page 19: Block Diagram

    AT+5V MAIN W/T.TEXT IC101 OECF004A Q102 LED SW ON_TIMER Q103 D105 KEY_IN ON TIMER LED SW SDA 13 AVDD1 SCL 14 STAND BY AVDD2 OSD-B AVDD3 AT+5V OSD-G 10 OSD-R OS101 REMORT CVBS2 29 OSC_OUT CVBS1 30 X101 4MHz 51 OSC_IN SOUND AMPIC IC1001 SPEAKER...

  • Page 20: Printed Circuit Boards Main/Crt

    R421 D410 W094 C403 R122 C006 PH001 PRINTED CIRCUIT BOARDS MAIN/CRT (INSERTED PARTS) SOLDER SIDE TP402 TP401 R501 C526 CP502 B502 D523 C524 TH501 W082 W052 R445 T401 W836 C440 T501 Q402 R446 VR501 R516 C634 B504 C446 C423 D510 C517 C506 R521...
  • Page 21 C806 R816 C804 R813 C746 IC703 R1002 C704 C1004 Q102 R1004 C112 Q103 C105 C104 R104 C1006 R102 PRINTED CIRCUIT BOARDS MAIN/CRT (CHIP MOUNTED PARTS) SOLDER SIDE R618 Q605 R611 R623 C201 Q604 Q602 R219 R217 Q202 C119 R143 R617 R615 R117 C116...
  • Page 22 ACCESSORY ANT001 BT001 T4-216BP-BK R03(AB)2PXGPI BT002 R03(AB)2PXGPI TM101 R108 RC-FK010 1.2K R139 R104 R102 R109 2.2K 2.2K FROM/TO SOUND AMP A_MUTE POWER FROM/TO CHROMA/SIF/VIF/21PIN W820 H_CONT PROTECT CVBS_TXT C113 22P CH C116 FOR_VCR 0.0047 B C106 R111 V_OUT 0.0022 B C105 R117 C111...
  • Page 23 W829 W835 0.0022 B FROM/TO POWER P.CON+8V P.CON+5V FROM/TO SOUND AMP C617_1 AUDIO_OUT 22 16V KA FRONT_VIDEO_IN SW_AUDIO_IN SCART_AUDIO FROM/TO MICON/TUNER TU/RGB RF_AGC H_CONT PROTECT C631 NOTE: THIS SCHEMATIC DIAGRAM IS THE LATEST AT THE TIME OF PRINTING AND SUBJECT TO CHANGE WITHOUT NOTICE CHROMA/SIF/VIF/21PIN SCHEMATIC DIAGRAM (MAIN PCB) SIF BUFFER...

  • Page 24: Power Schematic Diagram

    1SS133 RY501 ALKS321 L503 8R140018 (LK1aF-12V) (028R140027) CP502 A1561WV2-2P TH501 B59104-J80-A10 (J104-A80-A10) SW501 SDKVA30100 F501 L501_1 T4A_L_250V NC NC 0R7A223F24Y AC230V_50Hz CD501_1 06655827 FH501 FH502 BLUE EYF-52BC EYF-52BC BROWN BLUE CP501 BROWN A3963WV2-3PD CAUTION: DIGITAL TRANSISTOR CAUTION: DIGITAL TRANSISTOR ATTENTION: LES PIECES REPAREES PAR UN ETANT CAUTION:...
  • Page 25 DEFLECTION/CRT SCHEMATIC DIAGRAM FROM/TO CHROMA/SIF/VIF/21PIN R422 820 1/4W G.OUT R.OUT B.OUT V-DRIVE IC401 TDA8174A V_OUT VAMP ABCL H_OUT 14.5 23.0 12.0 R404 330K +-1% R406 6.8K HS401 763WSAA013 T401 ETH09K14BZ H.DRIVE Q402 2SC1627_Y 27.0 FROM/TO POWER R424 H.DRV+B 180 1W P.CON+8V +B_135V D407...

  • Page 26: Sound Amp Schematic Diagram

    L714 10uH 0305 C740 R740 220 1/4W FROM/TO CHROMA/SIF/VIF/21PIN SW_AUDIO_IN FRONT_VIDEO_IN SCART_AUDIO AUDIO_OUT FROM/TO POWER SOUND+B P.CON+8V SOUND_GND FROM/TO MICON/TUNER A_MUTE POWER 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 27: Micon/Tuner

    MICON/TUNER 0.2ms 1.00V 0.2ms 1.00V 0.5 s 1.00V 0.5 s 1.00V 10ms 1.00V WAVEFORMS 20 s 1.00V CHROMA/SIF/VIF/21PIN 0.50V 20 s 1.00V 20us 0.50V 20us 1.00V NOTH: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram. 500 s 50mV 20 s...

  • Page 28: Deflection/Crt

    20 s 1.00V 20 s 5.00V DEFLECTION/CRT 10ms 1.00V 10ms 10.0V 10ms 10.0V WAVEFORMS 20 s 10.0V 20 s 5.00V 200V 20 s 20 s NOTH: The following waveforms were measured at the point of the corresponding balloon number in the schematic diagram. 20 s SOUND AMP 500us...

  • Page 29: Mechanical Exploded View

    MECHANICAL EXPLODED VIEW PCB110 (CRT PCB) PCB010 (MAIN PCB)

  • Page 30: Mechanical Replacement Parts List

    MECHANICAL REPLACEMENT PARTS LIST REF. NO. PART NO. A3L804M720 CABINET,FRONT ASSY 752WSA0216 SHIELD,CASE 752WSA0272 SHIELD,AUDIO 752WSA0286 SHIELD,IC 701UPJ0305 CABINET,FRONT 713UPA0020 GUIDE,REMOCON 713UPA0021 GLASS,LED 735UPA0097 BUTTON,BASE 735UPB0013 BUTTON,FRAME 702UPA0239 CABINET,BACK 761WPAA060 HOLDER,PCB 7225490087 SHEET,RATING 735UPB0014 BUTTON,POWER 741WUA0020 SPRING,EARTH 899HV3T001 HOLDER,ANODE WIRE 8121J50B54 SCREW,TAPPING(B0) GW20 8117540A64...

  • Page 31: Electrical Replacement Parts List

    ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. RESISTORS R001 R002T2183J R002 R002T2183J R003 R002T4271J R004 R002T4271J R005 R801R7104J R006 R801R7153J R102 R801R7222J R104 R801R7821J R105 R801R7103J R106 R801R7103J R107 R002T4101J R108 R801R7122J R109 R801R7222J R110 R801R7562J R111 R801R7153J R112 R801R7473J R113 R801R7562J...
  • Page 32 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. RESISTORS R714 R801R7750J R715 R801R7750J R719 R801R7104J R740 R002T4221J R741 R002T4102J R802 R002T4272J R803 R3X18A153J R,METAL OXIDE R804 R002T4272J R805 R3X18A153J R,METAL OXIDE R806 R002T4272J R807 R3X18A153J R,METAL OXIDE R809 R801R7122J R811 R801R7122J R813 R801R7271J...
  • Page 33 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. CAPACITORS C1004 CS0RB04W2K C1005 E50HU5010M C1006 CS0RB04Q2K C1007 E50HU2100M C1009 CS0RB04Q3K DIODES D001 D97U03301B DIODE,ZENER D102 D97U05R11B DIODE,ZENER D104 D1VT001330 DIODE,SILICON D105 0021E9Q010 D108 D1VT001330 DIODE,SILICON D403 D2WT011E10 DIODE,SILICON D405 D2WTAU02A0 DIODE,SILICON D406 D1VT001330 DIODE,SILICON...
  • Page 34 ELECTRICAL REPLACEMENT PARTS LIST REF. NO. PART NO. MISCELLANEOUS OS101 0773071001 REMOTE RECEIVER PH001 069D01001A CONNECTOR PCB SIDE 069W01001A CONNECTOR PCB SIDE RY501 0560V20115 RELAY SP1001 070C732003 SPEAKER TH501 D8E0J80A10 DEGAUSS ELEMENT TM101 076N0FK010 TRANSMITTER TU001 0145517006 TUNER,VHF-UHF ! V801 098P1404B2 CRT W/DY X101...

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