Sharp LC-20SH4U, Руководство по обслуживанию

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LC-20SH4U
SUPPLEMENT
SERVICE 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.
MODEL
LC-20SH4U
SHARP CORPORATION
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
LCD COLOR TELEVISION
CONTENTS
»
IMPORTANT SERVICE SAFETY PRECAUTION ........................................................................................ 2
»
REMOVING OF MAJOR PARTS .................................................................................................................. 5
»
ADJUSTING PROCEDURE OF EACH SECTION ....................................................................................... 9
»
TROUBLE SHOOTING TABLE .................................................................................................................. 20
»
BLOCK DIAGRAM ...................................................................................................................................... 24
»
OVERALL WIRING DIAGRAM ................................................................................................................... 26
»
SCHEMATIC DIAGRAM
Ë
MAIN Unit ................................................................................................................................................. 28
Ë
SUB Unit .................................................................................................................................................. 38
Ë
R/C, LED Unit .......................................................................................................................................... 44
»
PRINTED WIRING BOARD ASSEMBLIES ................................................................................................45
»
REPLACEMENT PARTS LIST .................................................................................................................... 58
»
PACKING OF THE SET .............................................................................................................................. 69
Page
SUPPLEMENT
The LCD panel of this model has been redesigned. With this redesign, the main, sub and R/C, LED PWB
unit as well as the LCD panel-related and other component parts have also been modified. In this respect,
these parts of this model are not interchangeable with those of previous LCD panel models in servicing.
This Service Manual covers the modified points among others.
For other technical points, refer to the Service Manual of Model LC-20SH4U (S25E5LC20SH4U).
The previous LCD panel models and the new model can be identified with the following markings.
•
The
B
character is added at the end of the model number on the serial number label.
•
The
B
character is also added at the end of the model number on the number label (barcode label) of the
packing case.
•
The serial product numbers (in the 5th thru 9th digits) are 71112 and on.
OUTLINE
S85M6LC20SH4U