Video Signal Adjustment Procedure - Sharp LC-37SD1E Service Manual

[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)
• Composite signal PAL
• 15K component signal
(50 Hz)
2. Entering the adjustment process mode
1. Enter the adjustment process mode according to Section 3.
3. RF AGC adjustment
Adjustment point
1 Setting
2 Auto adjustment
performance
4. PAL signal & 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 (Pedestal to white level)
: Y level
0.7Vp-p ±0.02Vp-p
PB, PR level
Adjustment Conditions
[Signal]
PAL
Sprit Field Colour Bar
RF signal UV
[Terminal]
TUNER
Adjustment process
Page3
Adjustment Conditions
[Signal]
PAL
Full Field Color Bar
Composite or RF signal
[Terminal]
EXT3 VIDEO IN
TUNER
Adjustment process
Page3
Adjustment procedure
• Feed the PAL Sprit Field colour bar signal to TUNER.
Signal level: 50 dB µV +0dB, -1dB (75Ω LOAD)
Bring the cursor on [
[ RF AGC ADJ OK] appears when finished.
Adjustment procedure
• 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.
VIDEO IN SIGNAL]
100% white
Bring the cursor on [
[ PAL + TUNER ADJ OK] appears when finished.
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LC-37SA1E/RU
[RF Signal]
100% white
RF AGC ADJ] and press [OK]
[RF Signal]
100% white
PAL + TUNER ADJ] and press [OK]