Sanyo PLC-SW30 Service Manual page 24

Electrical Adjustments
c
Video Gain adjustment
1. Receive the 16-step gray scale composite video sig-
nal with Video [Video] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
chassis ground (-).
7
4. Select item no. " " and change data value to adjust
waveform "a" to be minimum amplitude.
5. Connect an oscilloscope to test point "
chassis ground (-).
8
6. Select item no. " " and change data value to adjust
waveform "a" to be minimum amplitude.
7. Connect an oscilloscope to test point "
chassis ground (-).
9
8. Select item no. " " and change data value to adjust
waveform "a" to be minimum amplitude.
White Level
(a)
v
480p Pedestal adjustment
1. Receive the 16-step gray scale component signal
(480p format) with COMPUTER IN [COMPONENT]
mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
chassis ground (-).
275
4. Select item no. " " and change data value to adjust
the pedestal level and black level to be the same
level.
5. Connect an oscilloscope to test point "
chassis ground (-).
276
6. Select item no. " " and change data value to adjust
the pedestal level and black level to be the same
level.
7. Connect an oscilloscope to test point "
chassis ground (-).
277
8. Select item no. " " and change data value to adjust
the pedestal level and black level to be the same
level.
b
480p Gain adjustment
1. Receive the 16-step gray scale component signal
(480p format) with COMPUTER IN [COMPONENT]
mode.
TPR1
" (+) and 2. Enter the service mode.
3. Connect an oscilloscope to test point "
chassis ground (-).
4. Select item no. "
TPG1
" (+) and waveform "a" to be minimum amplitude.
5. Connect an oscilloscope to test point "
chassis ground (-).
6. Select item no. "
TPB1
" (+) and waveform "a" to be minimum amplitude.
7. Connect an oscilloscope to test point "
chassis ground (-).
8. Select item no. "
waveform "a" to be minimum amplitude.
n
480i Gain adjustment
1. Receive the 16-step gray scale component signal
(480i format) with COMPUTER IN [COMPONENT]
mode.
2. Enter the service mode.
TPR1
" (+) and 3. Connect an oscilloscope to test point "
chassis ground (-).
4. Select item no. "
waveform "a" to be minimum amplitude.
5. Connect an oscilloscope to test point "
TPG1
" (+) and chassis ground (-).
6. Select item no. "
waveform "a" to be minimum amplitude.
7. Connect an oscilloscope to test point "
chassis ground (-).
TPB1
" (+) and 8. Select item no. "
waveform "a" to be minimum amplitude.
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7
" and change data value to adjust
8
" and change data value to adjust
9
" and change data value to adjust
White Level
(a)
7
" and change data value to adjust
8
" and change data value to adjust
9
" and change data value to adjust
White Level
(a)
TPR1
" (+) and
TPG1
" (+) and
TPB1
" (+) and
TPR1
" (+) and
TPG1
" (+) and
TPB1
" (+) and