Video Signal Adjustment Procedure - Sharp LC-90LE740X Service Manual

LC-90LE740X

10. Video signal adjustment procedure

The adjustment process mode menu is listed in Section 5.
Signal generator level adjustment check (Adjustment to the specified level)
• Composite signal PAL/SECAM
• RGB signal
• 15K component signal (50 Hz)
• 33K component signal (50 Hz)
• Composite signal NTSC
10.1. Entering the adjustment process mode
Enter the adjustment process mode according to Section 3.
10.2. PAL signal adjustment
Adjustment point
1 Setting
2 Auto adjustment
performance
* ATTENTION: Please execute [3. TUNER adjustment] afterwards if you adjust [2. PAL signal adjustment] after all adjustments are completed.
10.3. TUNER adjustment
Adjustment point
1 Setting
2 Auto adjustment
performance
: 0.7Vp-p ± 0.02Vp-p (Pedestal to white level)
: 0.7Vp-p ± 0.02Vp-p
: 0.7Vp-p ± 0.02Vp-p (Pedestal to white level)
: Y level
: 0.7Vp-p ± 0.02Vp-p
: PB, PR level
: 0.7Vp-p ± 0.02Vp-p (Pedestal to white level)
: Y level
: 0.7Vp-p ± 0.02Vp-p
: PB, PR level
: 0.714Vp-p ± 0.02Vp-p (Pedestal to white level)
Adjustment conditions
[Signal]
PAL
Full field colour bar composite
signal
[Terminal]
INPUT6 video input
Adjustment process
[PAL ADJ]
page 4/20
Adjustment conditions
[Signal]
PAL split field colour Bar
RF signal UV
[Terminal]
TUNER
Adjustment process
[TUNER ADJ]
page 3/20
Adjustment procedure
• Feed the PAL full field colour bar signal (75% colour saturation) to INPUT6
video input.
[VIDEO input signal]
100% white
Bring the cursor on [PAL ADJ] and press [ENTER].
[PAL ADJ OK] appears when finished.
Adjustment procedure
• Feed the PAL Split Field colour bar signal to TUNER.
• Make sure the PAL colour bar pattern has the sync level of 7:3 with the
picture level.
Bring the cursor on [TUNER ADJ] and press [ENTER].
[TUNER ADJ OK] appears when finished.
5 – 10
Black
[E-12CH]
100% white