Sharp LC-12A2E Service Manual
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Sharp LC-12A2E Service Manual

Sharp LC-12A2E Service Manual

Lcd color television
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» IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................. 2
» ELECTRICAL SPECIFICATIONS ......................................................................................................... 3
» OPERATION MANUAL ......................................................................................................................... 4
» OUTLINE DIMENSION FIGURE .......................................................................................................... 5
» DISASSEMBLY OF THE SET ............................................................................................................... 6
» ADJUSTING PROCEDURE OF EACH SECTION ............................................................................... 8
» TROUBLE SHOOTING TABLE ........................................................................................................... 11
» CHASSIS LAYOUT ............................................................................................................................. 14
» BLOCK DIAGRAM .............................................................................................................................. 16
» DESCRIPTION OF SCHEMATIC DIAGRAM ..................................................................................... 18
» SCHEMATIC DIAGRAMS ................................................................................................................... 19
» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 26
» PARTS LIST
Ë ELECTRICAL PARTS ..................................................................................................................... 31
MAIN UNIT ..................................................................................................................................... 31
TERMINAL UNIT ............................................................................................................................ 35
SWITCH UNIT ................................................................................................................................ 37
R/C UNIT ........................................................................................................................................ 37
Ë SUPPLIED ACCESSORIES PARTS .............................................................................................. 38
Ë PACKING PARTS ........................................................................................................................... 38
Ë CABINET PARTS LIST ................................................................................................................... 38
Ë CABINET AND MECHANICAL PARTS .......................................................................................... 39
» PACKING OF THE SET ...................................................................................................................... 40
SERVICE MANUAL
MODEL
In the interests of user-safety (Required by safety regula-
tions in some countries) the set should be restored to its
original condition and only parts identical to those specified
be used.
CONTENTS
SHARP CORPORATION
1
LCD COLOR TELEVISION
LC-12A2E
LC-12A2E
S00J8LC-12A2E
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Summary of Contents for Sharp LC-12A2E

  • Page 1: Table Of Contents

    LC-12A2E SERVICE MANUAL S00J8LC-12A2E LCD COLOR TELEVISION LC-12A2E MODEL In the interests of user-safety (Required by safety regula- tions in some countries) the set should be restored to its original condition and only parts identical to those specified be used.

  • Page 2: Important Service Safety Precaution

    LC-12A2E IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be perfomed only by qualified service technicians who are thoroughly familiar with all safety checks and the servicing guidelines which follow: WARNING • Use an AC voltmeter having with 5000 ohm per volt, or higher, sensitivity or measure the AC voltage drop across 1.

  • Page 3: Electrical Specifications

    LC-12A2E ELECTRICAL SPECIFICATIONS Items ..............12" LCD COLOR TV, Model: LC-12A2E LCD panel ....................12" TFT LCD Number of pixels ..................921,600 dots Video color system ................PAL/NTSC/SECAM TV FUNCTION TV Standard (CCIR) ................BG/DK/I/L/L' TV Tuning System ...............Auto preset 100 ch.

  • Page 4: Operation Manual

    LC-12A2E OPERATION MANUAL Main unit (rear view) Main unit (front view) Rear control panel To change the angle of the TV set, tilt the screen 10 degrees forward or 20 degrees backward. It can also be rotated 90 degrees. Please adjust the angle so that the TV set can be watched most comfortably.

  • Page 5: Outline Dimension Figure

    LC-12A2E OUTLINE DIMENSION FIGURE Unit: mm...

  • Page 6: Disassembly Of The Set

    LC-12A2E DISASSEMBLY OF THE SET 1. Insert your finger into the center of the terminal cover <<Disassembly of the main PWB>> 1. Disconnect the flexible cable connectors w and and pull it toward you to detach the terminal cover. 2. Remove the four screws 1 and one screw 2.
  • Page 7 LC-12A2E • Caution for handling the LCD panel <<Disassembly of LCD Panel>> 1. Work in a clean room. (Humidity: 50% or more) 1. Remove the six LCD unit fixing screws. 2. A worker must wear arm bands. 2. Remove the shield case.

  • Page 8: Adjusting Procedure Of Each Section

    LC-12A2E ADJUSTING PROCEDURE OF EACH SECTION Preparation for Adjustments Use the dedicated AC adapter or stable DC power supply. AC adapter: UADP-0210CEZZ DC power supply: 12 (V), 3.2 (A) [1] Adjusting procedure 1-1. Checker adjustment Power ON (initialization) → Setting of model and inch size → Model data transfer to the setting E C) →...
  • Page 9 LC-12A2E [4] Initialization 4-1. Connect the 81 pin and 82 pin of IC2001 (microcomputer) to GND, and turn on the power. 4-2. Select the model name (A2E/A2E(K)). 4-3. Select the inch size (12). 4-4. Return the 81 pin and 82 pin of IC2001 (microcomputer) to the original state.
  • Page 10 LC-12A2E 6-6. TAMP adjustment 1) Receive the E-12CH (PAL color bar). 2) If the reading of “Y” on the page 2 of the adjustment processing is not located between B0 and BA, perform the adjustment of “PAL TAMP” on the same page so that the reading of “Y” is located between B0 and BA.

  • Page 11: Trouble Shooting Table

    LC-12A2E TROUBLE SHOOTING TABLE...
  • Page 12 LC-12A2E TROUBLE SHOOTING TABLE (Continued)
  • Page 13 LC-12A2E TROUBLE SHOOTING TABLE (Continued)

  • Page 14: Chassis Layout

    LC-12A2E CHASSIS LAYOUT MAIN Unit (Side-A) MAIN Unit (Side-B)
  • Page 15 LC-12A2E TERMINAL Unit SWITCH Unit R/C Unit...

  • Page 16: Block Diagram

    LC-12A2E LC-12A2E BLOCK DIAGRAM 16~17...

  • Page 17: Description Of Schematic Diagram

    LC-12A2E DESCRIPTION OF SCHEMATIC DIAGRAM [Item] IMPORTANT SAFETY NOTICE: å PARTS MARKED WITH " "( ) ARE Resistors INPORTANT FOR MAINTAINING THE SAFETY OF Nonindication Carbon-film resistor THE SET. Solid resistor Metal-oxide-film resistor BE SURE TO REPLACE THESE PARTS WITH...

  • Page 18: Schematic Diagrams

    LC-12A2E SCHEMATIC DIAGRAMS Ë SWITCH and R/C Unit...
  • Page 19 LC-12A2E LC-12A2E Ë MAIN Unit -1/2 å AND SHADED COMPONENTS=SAFETY RELATED PARTS 20~21...
  • Page 20 LC-12A2E LC-12A2E Ë MAIN Unit -2/2 å AND SHADED COMPONENTS=SAFETY RELATED PARTS 22~23...
  • Page 21 LC-12A2E LC-12A2E Ë TERMINAL Unit å AND SHADED COMPONENTS=SAFETY RELATED PARTS 24~25...

  • Page 22: Printed Wiring Board Assemblies

    LC-12A2E PRINTED WIRING BOARD ASSEMBLIES Main Unit (Side-A)
  • Page 23 LC-12A2E Main Unit (Side-B)

  • Page 24: Terminal Unit

    LC-12A2E Terminal Unit (Side-A)
  • Page 25 LC-12A2E Terminal Unit (Side-B)

  • Page 26: Switch Unit

    LC-12A2E Switch Unit (Side-A) Switch Unit (Side-B) R/C Unit (Side-A) R/C Unit (Side-B)
  • Page 27 LC-12A2E PARTS LIST Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA077FE10 PARTS REPLACEMENT MAIN PWB UNIT Replacement parts which have these special safety character- INTEGRATED CIRCUITS istics identified in this manual: electrical components having IC201...
  • Page 28 LC-12A2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA077FE10 C325 VCKYCY1CB273K J 0.027 16V Ceramic MAIN PWB UNIT(Continued) C326 VCEAPW1CN477M J 470 16V Electrolytic C327 VCEAPF1HN105M J 1 50V Electrolytic D710 VHDDAN222//-1 J DAN222 C328...
  • Page 29 LC-12A2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA077FE10 C1116 VCKYCY1EF104Z J 0.1 25V Ceramic MAIN PWB UNIT(Continued) C1117 VCCCCY1HH560J J 56p 50V Ceramic C1118 VCKYCY1EF104Z J 0.1 25V Ceramic C836 VCE9PF1CN475M J 4.7 16V Electrolytic...
  • Page 30 LC-12A2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA077FE10 R752 VRS-TW2ED332J J 3.3k 1/4W Metal Oxide AB MAIN PWB UNIT(Continued) R753 VRS-CY1JF333J J 33k 1/16W Metal Oxide AA R754 VRS-CY1JF103J J 10k 1/16W Metal Oxide AA...
  • Page 31 LC-12A2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA077FE10 R2045 VRS-CY1JF223J J 22k 1/16W Metal Oxide AA MAIN PWB UNIT(Continued) R2047 VRS-CY1JF223J J 22k 1/16W Metal Oxide AA R2048 VRS-CY1JF332J J 3.3k 1/16W Metal Oxide AA...
  • Page 32 LC-12A2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA321DE01 C3261 VCKYCY1EF104Z J 0.1 25V Ceramic TERMINAL PWB UNIT(Continued) C3271 VCEAPF0JW226M J 22 6.3V Electrolytic C3301 VCE9PF1CW106M J 10 16V Electrolytic Q3402 VS2SC2712Y/-1 J 2SC2712Y C3302...
  • Page 33 LC-12A2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKA322DE01 DUNTKA321DE01 SWITCH PWB UNIT TERMINAL PWB UNIT(Continued) R3333 VRS-TV1JD000J 1/16W Metal Oxide AA DIODES R3401 VRS-TQ2BD750J J 75 1/8W Metal Oxide AA D4009 RH-EX0879CEZZ J Zener Diode...

  • Page 34: Ë Supplied Accessories Parts

    KLMP-0096CEZZ J Lamp Unit LANGQ9209CEFW J ITO Sheet Angle LHLDW1028GEZZ J Cable Clamp å LHLDZ2144CEKZ J Light Guide Plate Holder QACCK0002TAZZ J AC Cord(LC-12A2E) PGiDM0061CEZZ J Light Guide Plate å QACCB0016TAZZ J AC Cord(LC-12A2E(K)) PSHEP0211CEZZ J ITO Sheet RRMCG1618CESA J Remote Control...

  • Page 35: Ë Cabinet And Mechanical Parts

    LC-12A2E CABINET AND MECHANICAL PARTS Ref. No. Part No. Description Code Ref. No. Part No. Description Code 2-14 3-10 2-12 2-13 3-12 2-12 2-11 3-10 2-10 2-15 3-11 1-13 1-14 1-11 1-14 1-13 1-10...

  • Page 36: Packing Of The Set

    LC-12A2E Ref. No. Part No. Description PACKING OF THE SET Code Ref. No. Part No. Description Code å AC Cord QACCK0002TAZZ(LC-12A2E) å AC Cord QACCB0016TAZZ(LC-12A2E(K)) å AC Adapter UADP-0210CEZZ Remote Control RRMCG1618CESA Battery (2 pcs.) UBATU0026GEZZ SPAKX2902CEZZ Buffer Material SPAKP0781CEZZ...
  • Page 37 LC-12A2E Ref. No. Part No. Description Code Ref. No. Part No. Description Code...
  • Page 38 Code Ref. No. Part No. Description Code COPYRIGHT C 2000 BY SHARP CORPORATION ALL RIGHTS RESERVED. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without prior written permission of the publisher.

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