-28-
1. Receive the 1 dot black & white pattern computer sig-
nal.
2. Set to
COMPUTER
mode.
3. Enter the service mode.
4. Project only green light component to the screen.
5. Select group no. “
3
”, item no. “
8
” and change data
value to obtain the minimum flicker on the screen.
6. Project only blue light component to the screen.
7. Select group no. “
3
”, item no. “
9
” and change data
value to obtain the minimum flicker on the screen.
8. Project only red light component to the screen.
9. Select group no. “
3
”, item no. “
10
” and change data
value to obtain the minimum flicker on the screen.
Electrical Adjustments
.
Common Center adjustment
1. Receive the 16-step gray scale computer signal.
2. Set to
COMPUTER
mode.
3. Enter the service mode.
4. Connect an oscilloscope to test point “
TP25R1
” (+)
and chassis ground (-).
5. Select group no. “
2
”, item no. “
3
” and change data
value to adjust waveform “a” to be minimum ampli-
tude.
6. Connect an oscilloscope to test point “
TP25G1
” (+)
and chassis ground (-).
7. Select group no. “
2
”, item no. “
4
” and change data
value to adjust waveform “a” to be minimum ampli-
tude.
8. Connect an oscilloscope to test point “
TP25B1
” (+)
and chassis ground (-).
9. Select group no. “
2
”, item no. “
5
” and change data
value to adjust waveform “a” to be minimum ampli-
tude.
White Level
(a)
121m
PC Gain adjustment
1. Receive the 16-step gray scale video signal.
2. Set to
VIDEO
mode.
3. Enter the service mode.
4. Connect an oscilloscope to test point “
TP25R1
” (+)
and chassis ground (-).
5. Select group no. “
2
”, item no. “
3
” and change data
value to adjust waveform “a” to be minimum ampli-
tude.
6. Connect an oscilloscope to test point “
TP25G1
” (+)
and chassis ground (-).
7. Select group no. “
2
”, item no. “
4
” and change data
value to adjust waveform “a” to be minimum ampli-
tude.
8. Connect an oscilloscope to test point “
TP25B1
” (+)
and chassis ground (-).
9. Select group no. “
2
”, item no. “
5
” and change data
value to adjust waveform “a” to be minimum ampli-
tude.
White Level
(a)
,
AV Gain adjustment
1. Receive the 16-step gray scale computer signal.
2. Set to
COMPUTER
mode.
3. Enter the service mode.
4. Connect an oscilloscope to test point “
TP25R1
” (+)
and chassis ground (-).
5. Select group no. “
3
”, item no. “
11
” and change data
value to adjust the waveform “a” (black portion ) to
be maximum amplitude.
6. Connect an oscilloscope to test point “
TP25G1
” (+)
and chassis ground (-).
7. Select group no. “
3
”, item no. “
12
” and change data
value to adjust the waveform “a” (black portion ) to
be maximum amplitude.
8. Connect an oscilloscope to test point “
TP25B1
” (+)
and chassis ground (-).
9. Select group no. “
3
”, item no. “
13
” and change data
value to adjust the waveform “a” (black portion ) to
be maximum amplitude.
Black Level
(a)
n
PC Offset adjustment
Summary of Contents for PLC-XU45
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Page 113: ...1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L A18 15 Schematic Diagrams PLC XU45 46 Page A18 Left ...