Sharp AQUOS LC-26GA5H, Service Manual

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LC-26GA5H/M/X
7. LCD panel adjustment
Common bias adjustment
Adjustment item Adjustment conditions Adjustment procedure
COM BIAS Visual check
1. Enter the adjustment process mode.
2. Using the Cursor UP/DOWN keys on the remote controller, move to the
"COMBIAS" item. Using the Cursor RIGHT/LEFT keys, select the
setting.
3. Vary the setting with the Cursor UP/DOWN keys, and the test pattern
appears. Adjust the setting so that the flickering near the center of the
screen should be minimized.
4. Finally press the "OK" key on the remote controller to quit this item.
8. Video signal adjustment procedure
* Adjustment process mode menu is listed in section 5.
(1) Signal check
Signal generator level adjustment check (Adjustment to the specified level)
»
Composite signal : 0.714Vp-p ± 0.02Vp-p (Pedestal to white level)
»
15K component signal : Y level : 0.714Vp-p ± 0.02Vp-p (Pedestal to white level)
PB, PR level : 0.7Vp-p ± 0.02Vp-p
»
33K component signal : Y level : 0.7Vp-p ± 0.02Vp-p (Pedestal to white level)
PB, PR level : 0.7Vp-p ± 0.02Vp-p
(2) Entering the adjustment process mode
Enter the adjustment process mode according to the steps described in section 3.
(3) PAL signal adjustment (Tuner)
Adjustment item Adjustment conditions Adjustment procedure
1 Adjustment (SIGNAL)
∫
Composite Full-field
Colour bar signal
∫
RF signal (E-12ch)
(TERMINAL)
∫
INPUT1 video input
terminal
∫
Tuner RF terminal
2 Auto adjustment Page 3/14
performance
Feed the Full-field color bar signal (75% color saturation) to INPUT 1
input.
Feed the RF signal (by use of E-12ch) to TUNER.
Bring the cursor on [
Ë
PAL ALL ADJ] and press [ENTER].
[
Ë
PAL ALL ADJ FINISH] appears when finished.
[Video input signal] [E-12CH]
↑
100% white
↑
100% white