Sharp PG-C20XU Service Manual page 25

No. Adjusting point
6 RGB
countervoltage
adjustment
7 RGB tone
reproduction
adjustment
8 RGB white
balance adjust-
ment
9 Horizontal
center adjust-
ment
Adjusting conditions
1. Feed the countervoltage
adjustment signal. (XGA)
2. Select the following group,
sub-group and subjects.
Group : LCD2 (6050)
Sub-group: COM
Subject :
R_LCCOM (In R adjustment)
G_LCCOM (In G adjustment)
B_LCCOM (In B adjustment)
R_REVLCCOM (In R re-
verse adjustment)
G_REVLCCOM (In G re-
verse adjustment)
B_REVLCCOM (In B re-
verse adjustment)
1. Feed the green-only
SMPTE pattern signal.
(XGA)
2. Select the following
group, sub-group and
subject.
Group : Adjust PC Image
Sub-group: CXA2111R
Subject : AMP-BLK
1. Feed the 32-step gray-
scale signal. (XGA)
2. Select the following group,
sub-group and subjects.
Group : Adjust PC Image
Sub-group: CXA2111R
Subject : AMP-R-BLK
(In R adjustment)
AMP-B-BLK
(In B adjustment)
1. Feed the NTSC
monoscope signal.
2. Select the following
group, sub-group and
subject.
Group : Adjust VIDEO Image
Sub-group: VPC3230
Subject : H-Position
Adjusting procedure
» Using the set's control switch or the remote control-
ler's button, adjust the setting so that the flickering
be minimum.
» Adjust the setting so that the image comes to the
center of the screen.
» Adjust the AMP-BLK setting so that the gradation of
the part 1 (white 95% and 100%) as shown in the
figure below is barely discernible.
» Make sure that the gradation of the part 2 (black
0% and 5%) is also discernible.
2
» Adjust the setting to achieve the best color tone
balance.
» Make sure the setting is 52.
25
PG-C20XU
PG-C20XE
AN-Z7T
1