Sharp PG-C20XU Service Manual page 24

PG-C20XU
PG-C20XE
AN-Z7T
No. Adjusting point
3 Drive adjust-
ment
4 Panel input
signal amplitude
adjustment
5 Sample hold
pulse phase
checking
Adjusting conditions
1. Feed the XGA 10-step sig-
nal.
2. Select the following group,
sub-group and subjects.
Group : Adjust PC Image
Sub-group: AD
Subject :
R-Contrast (In R adjustment)
G-Contrast (In G adjustment)
B-Contrast (In B adjustment)
3. Connect the synchroscope
(0.2V/div.) to the following
TPs.
In R adjustment TP1403
In G adjustment TP1402
In B adjustment TP1401
1. Select the following group,
sub-group and subjects.
Group : Adjust PC image
Sub-group: CXA2111R
Subject :
AMP-R-GAIN (In R adjustment)
AMP-R-BLK (In R adjustment)
AMP-G-GAIN (In G adjustment)
AMP-G-BLK (In G adjustment)
AMP-B-GAIN (IN B adjustment)
AMP-B-BLK (IN B adjustment)
2. Connect the synchroscope
to the following TPs.
In R adjustment TP1101
In G adjustment TP1201
In B adjustment TP1301
3. Feed the XGA 10-step sig-
nal.
1. Feed the XGA mode mono-
chrome signal.
2. Select the following group,
sub-group and subjects.
Group : LCD2(6050)
Sub-group: CLDLY
Subject : R_CLDLY
G_CLDLY
B_CLDLY
R_REVCLDLY
G_REVCLDLY
B_REVCLDLY
Adjusting procedure
» First reach a setting where the color tone level 10
gets saturated. Then decrease the setting by one
point.
0-gradation
1.Select AMP-R-GAIN and adjust the signal amplitude
to 3.8 ± 0.1. Select 0.1Vp-p.
2.Select AMP-R-BLK and adjust the white-white sig-
nal amplitude to 2.1 ± 0.1Vp-p.
Note: Make sure that the black side does not interfere
in GAIN adjustment.
Adjust the amplitude as for G and B in the same
procedure.
3.8Vp-p
» Feed the G (30%) signal to see if there is no vertical
stripe visible on the screen. If it is visible, adjust the
setting to somewhere between 160 and 200.
Make also sure that the R and B settings are as fol-
lows.
R_CLDLY 171
R_REVCLDLY 175
B_CLDLY 175
B_REVCLDLY 178
24
0.8Vp-p
10-gradation
2.1Vp-p