Sanyo PLC-EF60A, Service Manual

Page: 44 / 184

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v
Video level adjustment
1
Receive the 16-step grey scale computer signal with
INPUT 2 [RGB] mode.
2
Enter the service mode and select group no. “
200
”.
3
Connect an oscilloscope to test point “
TP_GVID1
” (+)
and chassis ground (-). Select item no. “
6
” and change
data value to adjust the amplitude to be
10.0
±0.05Vp-p.
4
Connect an oscilloscope to test point “
TP_RVID1
” (+)
and chassis ground (-). Select item no. “
7
” and change
data value to adjust the amplitude to be
10.0
±0.05Vp-p.
5
Connect an oscilloscope to test point “
TP_BVID1
” (+)
and chassis ground (-). Select item no. “
8
” and change
data value to adjust the amplitude to be
10.0
±0.05Vp-p.
(a)
black level
black level
b
Input adjustment
PC Input adjustment
1
Receive the 100% whole-white computer signal with
INPUT 2 [RGB]
mode.
2
Enter the service mode and select group no. “
784
”.
3
Select item no. “
0
” and change data value from “
0
” (de-
fault) to “
1
”. The adjustment will be carried out automati-
cally and the data value changes to “
2
” when finishing the
auto-adjustment correctly.
If the data value changes to “
-1
”, take adjustment above
again until the data is “2”.
AV Input adjustment
1
Receive the 100% whole-white component signal with
INPUT 2 [Y/Cr/Cb]
mode.
2
Enter the service mode and select group no. “
783
”.
3
Select item no. “
0
” and change data value from “
0
” (de-
fault) to “
1
”. The adjustment will be carried out automati-
cally and the data value changes to “
2
” when finishing the
auto-adjustment correctly.
If the data value changes to “
-1
”, take adjustment above
again until the data is “2”.
Electrical Adjustments
c
DC adjustment
1
Receive the 16-step grey scale computer signal with
INPUT 2 [RGB]
mode.
2
Enter the service mode and select group no. “
200
”.
3
Connect a digital voltmeter to test point “
TPV1G
” (+)
and chassis ground (-). Select item no. “
0
” and change
data value to adjust voltage to be
6.5
±0.1V.
4
Connect a digital voltmeter to test point “
TPV1R
” (+)
and chassis ground (-). Select item no. “
1
” and change
data value to adjust voltage to be
6.5
±0.1V.
5
Connect a digital voltmeter to test point “
TPV1B
” (+)
and chassis ground (-). Select item no. “
2
” and change
data value to adjust voltage to be
6.5
±0.1V.
6
Connect a digital voltmeter to test point “
TPV2G
” (+)
and chassis ground (-). Select item no. “
3
” and change
data value to adjust voltage to be
7.5
±0.1V.
7
Connect a digital voltmeter to test point “
TPV2R
” (+)
and chassis ground (-). Select item no. “
4
” and change
data value to adjust voltage to be
7.5
±0.1V.
8
Connect a digital voltmeter to test point “
TPV2B
” (+)
and chassis ground (-). Select item no. “
5
” and change
data value to adjust voltage to be
7.5
±0.1V.