Service manual

LC-90LE740X
5 – 10
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)
10.1. Entering the adjustment process mode
Enter the adjustment process mode according to Section 3.
10.2. PAL signal adjustment
* ATTENTION: Please execute [3. TUNER adjustment] afterwards if you adjust [2. PAL signal adjustment] after all adjustments are completed.
10.3. TUNER adjustment
• Composite signal PAL/SECAM : 0.7Vp-p ± 0.02Vp-p (Pedestal to white level)
• RGB signal : 0.7Vp-p ± 0.02Vp-p
• 15K component signal (50 Hz) : Y level : 0.7Vp-p ± 0.02Vp-p (Pedestal to white level)
: PB, PR level : 0.7Vp-p ± 0.02Vp-p
• 33K component signal (50 Hz) : Y level : 0.7Vp-p ± 0.02Vp-p (Pedestal to white level)
: PB, PR level : 0.7Vp-p ± 0.02Vp-p
• Composite signal NTSC : 0.714Vp-p ± 0.02Vp-p (Pedestal to white level)
Adjustment point Adjustment conditions Adjustment procedure
1 Setting [Signal]
PAL
Full field colour bar composite
signal
[Terminal]
INPUT6 video input
• Feed the PAL full field colour bar signal (75% colour saturation) to INPUT6
video input.
[VIDEO input signal]
2 Auto adjustment
performance
Adjustment process
[PAL ADJ]
page 4/20
Bring the cursor on [PAL ADJ] and press [ENTER].
[PAL ADJ OK] appears when finished.
Adjustment point Adjustment conditions Adjustment procedure
1 Setting [Signal]
PAL split field colour Bar
RF signal UV
[Terminal]
TUNER
• 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.
[E-12CH]
2 Auto adjustment
performance
Adjustment process
[TUNER ADJ]
page 3/20
Bring the cursor on [TUNER ADJ] and press [ENTER].
[TUNER ADJ OK] appears when finished.
100% white B lack
100% white