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Sharp LC-37SH20U Service Manual

Lcd color television
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See also: 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.
This model is based on the LC-37D40U and partially modified.
For the contents not covered in this Service Manual, accordingly, please refer to the LC-37D40U Service
Manual.
» IMPORTANT SERVICE SAFETY PRECAUTION .........................................................................................3
» SPECIFICATIONS ........................................................................................................................................6
» OPERATION MANUAL .................................................................................................................................7
» DIMENSIONS ............................................................................................................................................. 11
» REMOVING OF MAJOR PARTS ................................................................................................................ 12
» DESCRIPTION OF SCHEMATIC DIAGRAM .............................................................................................. 17
» SCHEMATIC DIAGRAM .............................................................................................................................18
» REPLACEMENT PARTS LIST .................................................................................................................... 24
» PACKING OF THE SET ..............................................................................................................................27

LCD COLOR TELEVISION

LC-37SH20U
MODEL
OUTLINE
CONTENTS
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
LC-37SH20U
S36S1LC37SH20

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Summary of Contents for Sharp LC-37SH20U

  • Page 1: Table Of Contents

    LC-37SH20U S36S1LC37SH20 LCD COLOR TELEVISION LC-37SH20U 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. OUTLINE This model is based on the LC-37D40U and partially modified.

  • Page 2: List Of Changed Parts

    LC-37SH20U LIST OF CHANGED PARTS Ref. No. Description LC-37D40U LC-37SH20U Note PRINTED WIRING BOARD ASSEMBLIES MAIN Unit DUNTKD640FM06 DUNTKD640FM08 Some parts change R/C,LED Unit DUNTKD641FM06 DUNTKD641FM08 Some parts change IF Unit DUNTKD643FM06 DUNTKD643FM08 Some parts change KEY Unit DUNTKD716FM06 DUNTKD716FM08...

  • Page 3: Important Service Safety Precaution

    LC-37SH20U IMPORTANT SERVICE SAFETY PRECAUTION Ë Service work should be performed only by qualified service technicians who are thor- oughly familiar with all safety checks and the servicing guidelines which follow: • Use an AC voltmeter having with 5000 ohm per volt, or...
  • Page 4 LC-37SH20U PRECAUTIONS A PRENDRE LORS DE LA REPARATION Ë La réparation ne peut être effectuée que par un technicien spécialisé qui s'est parfaitement accoutumé à toute vérification de sécurité et aux conseils suivants. AVERTISSEMENT conduite électrique ou une prise de terre branchée à la terre.
  • Page 5 LC-37SH20U Precautions for using lead-free solder 1 Employing lead-free solder "All PWBs" of this model employs lead-free solder. The LF symbol indicates lead-free solder, and is attached on the PWBs and service manuals. The alphabetical character following LF shows the type of lead-free solder.

  • Page 6: Specifications

    * Emergency alert messages via Cable are unreceivable. • As part of policy of continuous improvement, SHARP reserves the right to make design and specification changes for product improvement without prior notice. The performance specification figures indicated are nominal values of production units.

  • Page 7: Operation Manual

    LC-37SH20U OPERATION MANUAL...
  • Page 8 LC-37SH20U...
  • Page 9 LC-37SH20U...
  • Page 10 LC-37SH20U...

  • Page 11: Dimensions

    LC-37SH20U DIMENSIONS Unit: inch/(mm) (630) (934) (124)4 (115) (822.6) (119) (312) (200)

  • Page 12: Removing Of Major Parts

    LC-37SH20U REMOVING OF MAJOR PARTS 1. Remove the stand fixing screws (4 pcs.). 2. Remove the terminal screws (6 pcs.). 3. Remove the cabinet B fixing screws (9 pcs.). 4. Remove the cabinet B after opening from the direction of an arrow.
  • Page 13 LC-37SH20U 5. Remove the 6 lock screws from the right and left center angles and take out both center angles. 6. Remove the stand cover fixing screws (3 pcs.). 7. Remove the stand assist angle fixing screws (2 pcs.). 8. Remove the stand fixing angle fixing screws (4 pcs.).
  • Page 14 LC-37SH20U 11. Remove the PWB unit ass’y fixing screws (4 pcs.). 12. Remove the top cover ass’y. 13. Remove the key PWB fixing screws (3 pcs.). 14. Remove the 8 lock screws from the right and left speakers and take out both speakers.
  • Page 15 LC-37SH20U 16. Remove the SD card cover and terminal angle fixing screws (4 pcs.). 17. Remove the power PWB fixing screws (6 pcs.). 18. Remove the IF PWB fixing screws (4 pcs.). 19. Remove the heat sink and main PWB fixing screws (4 pcs.).
  • Page 16 LC-37SH20U 20. Remove the center assist angle fixing screws (2 pcs.). 21. Remove the 6 lock screws from the right and left corner angles(top) and take out both center angles(top). 22. Remove the 8 lock screws from the right and left corner angles(bottom) and take out both corner angles(bottom).

  • Page 17: Description Of Schematic Diagram

    LC-37SH20U DESCRIPTION OF SCHEMATIC DIAGRAM VOLTAGE MEASUREMENT CONDITION: 1. The voltages at test points are measured on the stable supply voltage of AC 120V. Signals are fed by a color bar signal generator for servicing purpose and the above voltages are measured with a 20k ohm/V tester.
  • Page 18 LC-37SH20U Ë MAIN Unit-4/22...
  • Page 19 LC-37SH20U Ë MAIN Unit-9/22...
  • Page 20 LC-37SH20U Ë IF-Unit...

  • Page 21: Schematic Diagram

    2. NO. DE REF 3. NO. DE PIECE 4. DESCRIPTION in USA: Contact your nearest SHARP Parts Distributor to order. For in CANADA: Contact SHARP Electronics of Canada Limited location of SHARP Parts Distributor, Please call Toll-Free; Phone (416) 890-2100...
  • Page 22 LC-37SH20U CABINET AND MECHANICAL PARTS 46 43 4-2-1 4-2-2 4-2-3 4-2-3 4-2-2 4-2-3 4-2-2 4-2-3 4-2-2...

  • Page 23: Cabinet And Mechanical Parts

    LC-37SH20U Ref. No. Part No. Description Code Ref. No. Part No. Description Code CABINET AND MECHANICAL PARTS SUPPLIED ACCESSORIES (Continued) LBSHZA005WJZZ X Bush, x2 LHLDW0110CESD X Cable Clamp, x1 LCHSMA286WJFW X Chassis Frame LHLDWA083WJ00 X Cable Tie, x1 LHLDW1173CEZZ X Wire Holder, x3 QACCDA039WJPZ X AC Cord å...

  • Page 24: Packing Of The Set

    LC-37SH20U PACKING OF THE SET...
  • Page 25 LC-37SH20U © COPYRIGHT 2006 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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