SHARP LC-37D90U Service Manual

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LC-37D90U

SERVICE MANUAL

No. S47E8LC37D90U

SUPPLEMENT

LCD COLOR TELEVISION

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

In this Service Manual, only parts in the LCD module are shown. For the other points, refer to the LC-37D90U
(S56S8LC37D90U) Service Manual.

LC-37D90U

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-37D90U

LC-37D90U

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-37D90U (S56S8LC37D90U) Service Manual.

[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

Fig. 3 VCOM adjustment jig (RUNTZA059WJZZ)

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