Sharp PG-C20XU Service Manual page 26

PG-C20XU
PG-C20XE
AN-Z7T
No. Adjusting point
10 Video BRIGHT-
NESS adjust-
ment
11 Video CON-
TRAST adjust-
ment
12 Color saturation
adjustment
13 PSIG adjust-
ment
Adjusting conditions
1. Feed the NTSC 10-step
signal.
2. Select the following group,
sub-group and subject.
Group : Adjust VIDEO Image
Sub-group: VPC3230
Subject : Bright
1. Feed the NTSC 10-step
signal.
2. Select the following group,
sub-group and subject.
Group : Adjust VIDEO Image
Sub-group: VPC3230
Subject : Contrast
3. Connect the synchroscope
to TP1402.
1. Feed the color bar signal.
2. Select the following group,
sub-group and subject.
Group : Adjust VIDEO Image
Sub-group: VPC3230
Subject : Color
1. Select the following group,
sub-group and subjects.
Group : Adjust VIDEO image
Sub-group: CXA2111R
Subject : PRGLEV
SIDLEV
2. Connect the synchroscope
to TP1210.
3. Using the NTSC 10-step
input signal, make sure that
there is no vertical stripes
appearing every 12 dots. (If
white or black vertical
stripes appear, fine-adjust
the SIDLEV setting.)
Adjusting procedure
» Make sure the setting is as shown below.
PG-C20XU ........ 142
PG-C20XE ........ 145
» First reach a setting where the color tone level 10
gets saturated. Then decrease the setting by one
point.
0-gradation
» Make sure the setting is 128.
PSIG
» Make sure the setting is as shown below.
PRGLEV ........... 61
SIDLEV ............. 170
26
0.8Vp-p
10-gradation