Sharp LC-37SD1E, Service Manual

Page: 37 / 182

LC-37SA1E/RU
3 – 22
[7] Video signal adjustment procedure
* The adjustment process mode menu is listed in Section 5.
1. Signal check
1. Signal generator level adjustment check (Adjustment to the specified level)
2. Entering the adjustment process mode
1. Enter the adjustment process mode according to Section 3.
3. RF AGC adjustment
4. PAL signal & tuner adjustment
• Composite signal PAL : 0.7Vp-p
±
0.02Vp-p (Pedestal to white level)
• 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
Adjustment point Adjustment Conditions Adjustment procedure
1 Setting [Signal]
PAL
Sprit Field Colour Bar
RF signal UV
[Terminal]
TUNER
• Feed the PAL Sprit Field colour bar signal to TUNER.
Signal level: 50 dB
µ
V +0dB, -1dB (75
Ω
LOAD)
2 Auto adjustment
performance Adjustment process
Page3
Bring the cursor on [ RF AGC ADJ] and press [OK]
[ RF AGC ADJ OK] appears when finished.
Adjustment point Adjustment Conditions Adjustment procedure
1 Setting [Signal]
PAL
Full Field Color Bar
Composite or RF signal
[Terminal]
EXT3 VIDEO IN
TUNER
• Feed the PAL full field colour bar signal (75% colour saturation) to
EXT3 VIDEO IN.
• Feed the RF signal (PAL colour bar) to TUNER.
• Make sure the PAL colour bar pattern (E-12) has the sync level of
7:3 with the picture level.
2 Auto adjustment
performance Adjustment process
Page3
Bring the cursor on [ PAL + TUNER ADJ] and press [OK]
[ PAL + TUNER ADJ OK] appears when finished.
[RF Signal]
㸡
100% white
㸡
100% white
㪲
VIDEO IN SIGNAL]
㸡
100% white
[RF Signal]