Sharp LC-20B2EA Service Manual
  1. Manuals
  2. Brands
  3. Sharp Manuals
  4. TV
  5. LC-20B2EA
  6. Service manual
Sharp LC-20B2EA Service Manual

Sharp LC-20B2EA Service Manual

Lcd colour television
Hide thumbs Also See for LC-20B2EA:
Table of Contents

Advertisement

Quick Links

Download this manual See also: Service Manual, Operating Manual
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored
to its original condition and only parts identical to those specified should be used.
PRECAUTION.................................................... 2
» SPECIFICATIONS ............................................. 3
» OPERATION MANUAL ...................................... 4
» DIMENSIONS .................................................... 5
» REMOVING OF MAJOR PARTS ....................... 6
» ADJUSTING PROCEDURE OF
EACH SECTION ................................................ 9
» TROUBLE SHOOTING TABLE ........................ 12
» CHASSIS LAYOUT .......................................... 18
» BLOCK DIAGRAM ........................................... 20
» OVERALL SCHEMATIC DIAGRAM ................. 22
Ë MAIN Unit .................................................. 26
SERVICE MANUAL
LCD COLOUR TELEVISION
MODEL
CONTENTS
Page
SHARP CORPORATION
LC-20B2EA
Ë TERMINAL Unit ......................................... 38
Ë INVERTER-A Unit ...................................... 46
Ë INVERTER-B Unit ...................................... 47
Ë ELECTRICAL PARTS ................................ 52
Ë MAIN UNIT ................................................ 52
Ë TERMINAL UNIT ....................................... 56
Ë R/C RECEIVER UNIT ................................ 60
Ë OPERATION UNIT ..................................... 61
Ë INVERTER-A UNIT .................................... 61
Ë INVERTER-B UNIT .................................... 61
Ë CABINET PARTS LOCATION .................... 62
Ë ACCESSORIES PARTS ............................ 62
Ë PACKING PARTS ....................................... 62
» PACKING OF THE SET ................................... 65
1
LC-20B2EA
S42I4LC20B2EA
Page

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the LC-20B2EA and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Sharp LC-20B2EA

Summary of Contents for Sharp LC-20B2EA

  • Page 1: Table Of Contents

    LC-20B2EA SERVICE MANUAL S42I4LC20B2EA LCD COLOUR TELEVISION LC-20B2EA MODEL In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its original condition and only parts identical to those specified should be used.

  • Page 2: Important Service Safety Precaution

    LC-20B2EA Specifications IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be perfomed only by qualified service technicians who are thor- oughly familiar with all safety checks and the servicing guidelines which follow: such as electrical conduit or electrical ground connected WARNING to an earth ground.

  • Page 3: Specifications

    LC-20B2EA SPECIFICATIONS  ...

  • Page 4: Operation Manual

    LC-20B2EA OPERATION MANUAL...

  • Page 5: Dimensions

    LC-20B2EA DIMENSIONS Unit: mm MENU TV/VIDEO 401.3 107.3 72.6 AV-IN 1 AV-IN 2 S-VIDEO VIDEO AUDIO OUT AUDIO POWER INPUT DC13V 30.5 163.9 65.5 229.4...

  • Page 6: Removing Of Major Parts

    LC-20B2EA REMOVING OF MAJOR PARTS 1. Remove the two back covers. 2. Remove the table stand fixing screws (4 pcs.). 3. Remove the cabinet B fixing screws (14 pcs.) and detach the cabinet. : XBBSF30P06000, : XEBSF40P16000) 4. Remove the reinforcement angle fixing screws (4 pcs.).
  • Page 7 LC-20B2EA 6. Remove the main PWB fixing screws (3 pcs.). 7. Remove the inverter-A PWB fixing screws (2 pcs.). 8. Remove the inverter-B PWB fixing screws (1 pc.). 9. Remove the chassis Frame-A fixing screws (3 pcs.). 10. Undo the hooks and slide the chassis frame B out of position. Take out the terminal PWB.
  • Page 8 LC-20B2EA » Precautions in handling the LCD panels 1. Work in a clean room (with humidities below 50%). 2. Be sure to wear an anti-static armband. 3. Handle the panels on an electroconductive mat. 4. Be careful not to fall, shake and shock the panels.
  • Page 9 LC-20B2EA...
  • Page 10 LC-20B2EA 4. Initialization When the microprocessor (IC2001) or the EEPROM (IC2004) has been replaced or when the EEPROM has been initialized, readjust the each adjustments. 4-1. Connect the pins (81) and (82) of IC2001 (microprocessor) to GND, and turn on the power.
  • Page 11 LC-20B2EA 6. Factory Setting 6-1. Perform a factory setting after completing all adjustments. 6-2. A “POWER” keys is made on with pushing an “TV/VIDEO” and “MENU” keys at the same time. 6-3. “K” of the inspection process mode is displayed on the screen upper left.

  • Page 12: Trouble Shooting Table

    LC-20B2EA TROUBLE SHOOTING TABLE...
  • Page 13 LC-20B2EA TROUBLE SHOOTING TABLE (Continued)
  • Page 14 LC-20B2EA TROUBLE SHOOTING TABLE (Continued)
  • Page 15 LC-20B2EA TROUBLE SHOOTING TABLE (Continued)
  • Page 16 LC-20B2EA TROUBLE SHOOTING TABLE (Continued)
  • Page 17 LC-20B2EA TROUBLE SHOOTING TABLE (Continued)

  • Page 18: Chassis Layout

    LC-20B2EA CHASSIS LAYOUT MAIN Unit TERMINAL Unit...
  • Page 19 LC-20B2EA INVERTER-A Unit INVERTER-B Unit R/C RECEIVER Unit OPERATION Unit...

  • Page 20: Block Diagram

    LC-20B2EA LC-20B2EA BLOCK DIAGRAMS 20~21...

  • Page 21: Overall Schematic Diagram

    LC-20B2EA LC-20B2EA OVERALL SCHEMATIC DIAGRAM 22~23...

  • Page 22: Description Of Schematic Diagram

    LC-20B2EA 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 BE SURE TO REPLACE THESE PARTS WITH Metal-oxide-film resistor...

  • Page 23: Schematic Diagramë R/C Receiver And Operation Unit

    LC-20B2EA SCHEMATIC DIAGRAM Ë R/C RECEIVER and OPERATION Unit R/C RECEIVER Unit OPERATION Unit...

  • Page 24: Ë Main Unit

    LC-20B2EA LC-20B2EA Ë MAIN Unit -1/6 DIGITAL 1 26~27...
  • Page 25 LC-20B2EA LC-20B2EA Ë MAIN Unit -2/6 DIGITAL 2 28~29...
  • Page 26 LC-20B2EA LC-20B2EA Ë MAIN Unit -3/6 DIGITAL 3 30~31...
  • Page 27 LC-20B2EA LC-20B2EA Ë MAIN Unit -4/6 DIGITAL 4 32~33...
  • Page 28 LC-20B2EA LC-20B2EA Ë MAIN Unit -5/6 DIGITAL 5 34~35...
  • Page 29 LC-20B2EA LC-20B2EA Ë MAIN Unit -6/6 DIGITAL 6 å 36~37...

  • Page 30: Ë Terminal Unit

    LC-20B2EA LC-20B2EA Ë TERMINAL Unit -1/4 ANALOG 1 38~39...
  • Page 31 LC-20B2EA LC-20B2EA Ë TERMINAL Unit -2/4 ANALOG 2 40~41...
  • Page 32 LC-20B2EA LC-20B2EA å AND SHADED COMPONENTS=SAFETY RELATED PARTS Ë TERMINAL Unit -3/4 ANALOG 3 å 42~43...
  • Page 33 LC-20B2EA LC-20B2EA Ë TERMINAL Unit -4/4 ANALOG 4 44~45...

  • Page 34: Ë Inverter-A Unit

    LC-20B2EA Ë INVERTER-A Unit å AND SHADED COMPONENTS=SAFETY RELATED PARTS å å å...

  • Page 35: Ë Inverter-B Unit

    LC-20B2EA INVERTER-B Unit å AND SHADED COMPONENTS=SAFETY RELATED PARTS å å...

  • Page 36: Printed Wiring Board Assemblies

    LC-20B2EA PRINTED WIRING BOARD ASSEMBLIES MAIN Unit (Side-A)
  • Page 37 LC-20B2EA MAIN Unit (Side-B)
  • Page 38 LC-20B2EA TERMINAL Unit...
  • Page 39 LC-20B2EA INVERTER-B Unit R/C RECEIVER Unit INVERTER-A Unit OPERATION Unit...

  • Page 40: Parts List

    LC-20B2EA PARTS LIST Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB148FE06 PARTS REPLACEMENT MAIN Unit INTEGRATED CIRCUITS Replacement parts which have these special safety character- istics identified in this manual: electrical components having IC401 VHiBA7046F/-1 J BA7046F such features are identified by “...
  • Page 41 LC-20B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB148FE06 C813 RC-KZ1025CEZZ 10V Ceramic MAIN Unit (Continued) C814 VCKYCY1HB102K J 1000p 50V Ceramic C815 VCKYTV1CF684Z J 0.68 16V Ceramic D1110 VHDDAN222//-1 J DAN222 C816 VCKYTV1CF684Z J 0.68...
  • Page 42 LC-20B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB148FE06 C3727 VCEAPW0JN477M J 470 6.3V Electrolytic MAIN Unit (Continued) C3728 VCKYTV1CF105Z 16V Ceramic C3730 VCKYTV1HF104Z J 0.1 50V Ceramic C1149 VCKYCY1EF104Z J 0.1 25V Ceramic C3732...
  • Page 43 LC-20B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB148FE06 R1169 VRS-CF1JP333JY J 33k 1/16W Metal Oxide AC MAIN Unit (Continued) R1170 VRS-CY1JF683J J 68k 1/16W Metal Oxide AA R1171 VRS-CY1JF123F J 12k 1/16W Metal Oxide AA...

  • Page 44: Ë Terminal Unit

    LC-20B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB148FE06 R3750 VRS-CY1JF391J J 390 1/16W Metal Oxide AA MAIN Unit (Continued) R3751 VRS-TV1JD103J J 10k 1/16W Metal Oxide AA R3752 VRS-CY1JF102J J 1k 1/16W Metal Oxide AA...
  • Page 45 LC-20B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB152DE03 L2200 VP-1M4R7J1R2N J Peaking, 4.7µH TERMINAL Unit (Continued) L2201 VP-1M2R7JR85NY J Peaking, 2.7µH L2202 VP-1M4R7J1R2N J Peaking 4.7µH IC3305 VHiLA4635A+-1S J LA4635A L2203 VP-1M3R3JR93N J Peaking 3.3µH...
  • Page 46 LC-20B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB152DE03 C2217 VCEASH0JN477MY J 470 6.3V Electrolytic TERMINAL Unit (Continued) C2218 VCKYCY1EF104Z J 0.1 25V Ceramic C2219 VCKYCY1HF103Z J 0.01 50V Ceramic C2220 VCKYCY1HB102K J 1000p 50V Ceramic...
  • Page 47 LC-20B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB152DE03 R1915 VRS-CY1JF822F J 8.2k 1/16W Metal Oxide AA TERMINAL Unit (Continued) R1916 VRS-CY1JF822F J 8.2k 1/16W Metal Oxide AA R1917 VRS-CY1JF822F J 8.2k 1/16W Metal Oxide AA...
  • Page 48 LC-20B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB152DE03 TERMINAL Unit (Continued) BALUNES FB1601 RBLN-0006TAZZ J Balun, BLN-0006TA R3375 VRS-TW2ED000J 1/4W Metal Oxide AB FB1602 RBLN-0006TAZZ J Balun, BLN-0006TA R3401 VRS-CY1JF102J J 1k 1/16W Metal Oxide AA...

  • Page 49: Ë Operation Unit

    LC-20B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code DUNTKB155DE03 C6727 RC-FZA043WJZZ J 0.14 250V Film R/C RECEIVER Unit (Continued) RESISTORS DIODES R6700 VRS-TW2ED332J J 3.3k 1/4W Metal Oxide AB D4008 RH-EX1283CEZZ J Zener, EX1283CE R6701 VRS-TW2ED332J J 3.3k 1/4W...

  • Page 50: Ë Accessories Parts

    TiNS-7630CEZZ J Operation Manual 3-11 MHNG-3049CEFW J Hinge, Right RRMCGA031WJSA J Wireless Remote Control 3-12 MHNG-3050CEFW J Hinge, Side å QACCB0016TAZZ J AC Cord (LC-20B2EA(K)) AV 3-13 PSPAT0079CEZZ J Spacer, x2 å QACCK0006TAZZ J AC Cord (LC-20B2EA) 3-14 PSPAZ0415CEZZ J Spacer, x2 å...

  • Page 51: Ë Cabinet And Mechanical Parts

    LC-20B2EA CABINET AND MECHANICAL PARTS Ref. No. Part No. Description Code Ref. No. Part No. Description Code OPERATION Unit 1-13 1-11 1-12 INVERTER-A 1-13 1-10 MAIN PWB 1-12 INVERTER-B R/C RECEIVER Unit TERMINAL PWB...
  • Page 52 LC-20B2EA Ref. No. Part No. Description Code Ref. No. Part No. Description Code 3-11 3-17 3-18 3-13 3-13 3-14 3-10 3-12 3-17 3-17 3-14 3-16 3-19 3-15...

  • Page 53: Packing Of The Set

    LC-20B2EA PACKING OF THE SET Ref. No. Part No. Description Code Ref. No. Part No. Description Code   Operation Manual (TiNS-7630CEZZ) Cable Clamp (2 pcs.) (LHLDW0109CESA) Wrapping Paper Dry Battery (2 pcs.) (SSAKA0160CEZZ) AC Adapter (UADP-0241CEPZ) AC Cord Wireless Remote Control...
  • Page 54 Part No. Description Code © COPYRIGHT 2002 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.

Table of Contents