Sharp LC-20D30U Service Manual page 15

[7] Adjustment
7-1. AD converter level adjustment
1 D3 input
1) Feeding the D3 75% color bar signal
Instrument used: LEADER LT446 or LEADER LT448
(1) LEADER LT446
Signal name: COLOR BAR 75%
Setting: 01: 1920 x 1080 / 60i
H: 33.72 kHz, V: 29.97 Hz
(2) LEADER LT448
Signal name: COLOR BAR
* Use the LT446-compatible third type out of the 3 color bar patterns.
Setting: 02: 1080i / 59.94 (30sF)
H: 33.72 kHz, V: 29.97 Hz
2) Turn on the AUTO GAIN-OFFSET1 item on Adjustment Process Page 7.
2 PC input
1) Feeding the XGA white 100% signal
Instrument used: LEADER LT448
Signal name: RASTER 100%
Setting: 28: XGA (1024 x 768)
H: 48.36 kHz, V: 60.00 Hz
2) Turn on the AUTO GAIN2 item on Adjustment Process Page 8.
7-2. TAMP adjustment
1) Receive the standard color bar signal.
2) Suppose that the "YDATA" reading on Adjustment Process Page 2 is not as specified in the table below. Adjust
the "NTSC TAMP" setting on the same page to have the "YDATA" reading as specified below.
* Note that the setting may be different from model to model.
3) Make sure that the "PAL-M TAMP" and "PAL-N TAMP" settings are 6 higher than the "NTSC TAMP" setting.
Model LC-20D30U
Setting 155-158
Reference
(Adjustment process menu: Page 2 screen)
0 1 2 3 4
0
2
|
1
T A M
2 Y D A
3
T A M
4
N T S
5
P A L
6 P A L
7
8
5 6 7 8 9 10 11
P L
T A
P H
C T A M P
- M T A M P
- N T A M P
15
12 13 14 15 16 17 18 19 20 21
Y Data
(White 75%)
LC-20D30U
22 23 24 25 26
1 5 5
1 5 7
1 5 8
8 5
9 1
9 1