SHARP LC-37D42U, LC-37D43U, LC-C3742U Service Manual
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LC-37D42U/LC-37D43U/LC-C3742U
SERVICE MANUAL
No. S47G3LC37D42U
SUPPLEMENT
LCD COLOR TELEVISION
LC-37D42U
LC-37D43U
MODELS
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
In this Service Manual, only parts in the LCD module are shown. For the other points, refer to the LC-37D42U/LC37D43U/LC-C3742U (S06X9LC32D42U/SX6Y9LC37D43U/SX6Y7LCC3742U) Service Manual.
New panel modules are incorporated in LC-37D42U/LC-37D43U/LC-C3742U with the Serial No. "****51112~".
How to distinguish the model labels of new and old panel modules.
As to the new panel module, the mark A is printed on the model label.
Old panel module New panel module
No A mark on the right side of the model name A mark on the right side of the model name
Example Example
LC-C3742U
No Mark
A
Parts marked with " " are important for maintaining the safety of the set. Be sure to replace these parts with specified ones for maintaining the
safety and performance of the set.
This document has been published to be used for
after sales service only.
The contents are subject to change without notice.
LC-37D42U/LC-37D43U/LC-C3742U
LC-37D42U (A)
OUTLINE AND ADJUSTMENT
Service Manual
[1] Outline
In this Service Manual, only parts in the LCD module are shown. For the other points, refer to the LC-37D42U/LC-37D43U/LC-C3742U
(S06X9LC32D42U/SX6Y9LC37D43U/SX6Y7LCC3742U) Service Manual.
New panel modules are incorporated in LC-37D42U/LC-37D43U/LC-C3742U with the Serial No. "****51112~".
How to distinguish the model labels of new and old panel modules.
As to the new panel module, the mark A is printed on the model label.
Old panel module New panel module
No A mark on the right side of the model name A mark on the right side of the model name
Example Example
No Mark
A
[2] Adjustment
When replacing the LCD control PCB, follow these steps to adjust VCOM.
1) Remove the wire from the LCD control PCB CN3.
2) Connect a wire of the VCOM adjustment jig (electronic volume adjustment BOX) to CN3 (see Fig. 1).
3) Turn on the TV set.
4) Turn on the jig (connect to the AC).
5) Enter the process mode to display the item “LCD TEST PATTERN OFF” (see Fig. 2).
6) Press the volume up key once to display a flicker pattern.
7) Press the jig's UP/DOWN switch while looking at the screen to adjust the point so that the flicker is minimized (see Fig. 3).
8) After completing adjustment, press the WRITE switch and make sure the lamp of the WRITE button goes out. (Writing is complete when the lamp
goes out.)
9) Turn off the jig (turn the AC off).
10)Turn off the TV set.
11)Remove the jig’s wire connected to CN3.
12)Reconnect the wire of the set to CN3.
Jig connection
Fig. 1 Jig connecting location
Fig. 2 Test pattern selection screen
i
Fig. 3 VCOM adjustment jig (RUNTZA059WJZZ)
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