25
XG-C55X
No. Adjustment Items Adjustment Conditions Adjustment Procedures
5 Adjustment of
RGB counter-
voltage
1. Feed the counter-voltage adjust-
ment signal (XGA) prepared by the
Technical Department.
2. Select the following group and sub-
jects.
Group: OUTPUT3
Subject: RC (R), GC (G), BC (B)
1. Using the set's control switch or the
remote controller button, adjust the
settings to minimize flickers.
2. If the results are inconsistent at the
center and on both sides onscreen,
readjust the settings to get the same
results on both sides.
6 Adjustment of
RGB gradation
reproduction
1. Feed the SMPTE pattern signal
(XGA) .
2. Select the following group and sub-
ject.
Group: OUTPUT1
Subject: G1-BLK
1. Confirm that the 100% and 95% white
gradation as well as the 0% and 5%
black gradation are discernible.
2. If the white gradation looks differently,
finely adjust the G1-BLK setting.
7 Adjustment of
RGB white bal-
ance
1. Feed the 32-step gray scale signal
(XGA, 60 Hz).
2. Select the following group and sub-
jects.
Group: OUTPUT1
Subjects: R1-BLK (R), B1-BLK (B)
1. Adjust the R1-BLK and B1-BLK set-
tings to have the specified gradation
balance (according to the standard
monitor).
8 Adjustment of
video AGC
1. Feed the NTSC 10-step gray scale
signal.
2. Select the following group and sub-
ject.
Group: VIDEO
Subject: AGC-ADJ
3. Connect the oscilloscope between
TP4501 and TP4502
1. Using the set's control switch or the
remote controller button, adjust the
setting so that the white-to-black level
is 0.72 Vp-p±0.01 V.
9 Adjustment of
video brightness/
contrast
1. Feed the NTSC100% window pat-
tern signal.
2. Select the following group and sub-
jects.
Group: VIDEO
Subject: AUTO, PICTURE/BRIGHT
1. Feed the signal. Using the set's con-
trol switch or the remote controller
button, select the subject AUTO. The
setting will adjust itself.
2. And then lower the adjustment value
of the PICTURE/BRIGHT by 2 points.
3. Then adjust the PICTURE/BRIGHT
setting until the signal becomes bit-
less.
10 Adjustment of
video tint
1. Feed the split color bar signal.
2. Select the following group and sub-
ject.
Group: VIDEO1
Subject: TINT
1. Confirm the fixed value.
Fixed value: 128
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