Sharp PG-C20XU Service Manual page 27

No. Adjusting point
14 VIDEO panel
input signal
amplitude
adjustment
15 Video white
balance adjust-
ment
16 Automatic color
irregularity
correction
17 Color-related
performance
checking
18 Video-related
performance
checking
19 Audio-related
performance
checking
Adjusting conditions
1. Select the following group,
sub-group and subjects.
Group : Adjust VIDEO 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 NTSC 10-step
signal.
1. Feed the 32-step gray-
scale signal. (VIDEO)
2. Select the following group,
sub-group and subjects.
Group : Adjust VIDEO Image
Sub-group: CXA2111R
Subject :
AMP-R-BLK (In R adjustment)
AMP-B-BLK (In B adjustment)
1. Apply the automatic color
correction using the auto-
matic color irregularity cor-
rection system.
1. Feed the color bar signal.
1. Feed the monoscope pat-
tern signal.
1. Feed the audio signal.
Adjusting procedure
1.Select AMP-R-Gain and adjust the signal amplitude
to 3.8 ± 0.1Vp-p.
2.Select AMP-R-BLK and adjust the white-white sig-
nal amplitude to 2.1 ± 0.1Vp-p.
3.Select AMP-G-Gain and adjust the signal amplitude
to 3.5 ± 0.1Vp-p.
4.Select AMP-G-BLK and adjust the white-white sig-
nal amplitude to 2.6 ± 0.1Vp-p.
5.Select AMP-B-Gain and adjust the signal amplitude
to 3.5 ± 0.1Vp-p.
6.Select AMP-B-BLK and adjust the white-white signal
amplitude to 2.6 ± 0.1Vp-p.
Note: Make sure that the black side does not interfere
in Gain adjustment.
3.8Vp-p(R)
» Adjust the setting to achieve the best color tone bal-
ance.
» Make sure that no remarkable uneven color remains
on the screen.
» User adjustment:
Check the Color and Tint settings.
» User adjustment:
Check the performance relating to Contrast, Bright-
ness and Sharpness.
» User adjustment:
Check the sound volume performance.
27
PG-C20XU
PG-C20XE
AN-Z7T
2.1Vp-p(R)