Sanyo PLC-XF60, Service Manual

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Gain adjustment
PC gain 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. “
15
” and change
data value to adjust the amplitude “a” to be
minimum
.
4
Connect an oscilloscope to test point “
TP_RVID1
” (+)
and chassis ground (-). Select item no. “
16
” and change
data value to adjust the amplitude “a” to be
minimum
.
5
Connect an oscilloscope to test point “
TP_BVID1
” (+)
and chassis ground (-). Select item no. “
17
” and change
data value to adjust the amplitude “a” to be
minimum
.
AV gain adjustment
1
Receive the 16-step grey scale component signal with
INPUT 2 [Y/Cr/Cb]
mode.
2
Enter the service mode and select group no. “
210
”.
3
Connect an oscilloscope to test point “
TP_GVID1
” (+)
and chassis ground (-). Select item no. “
15
” and change
data value to adjust the amplitude “a” to be
minimum
.
4
Connect an oscilloscope to test point “
TP_RVID1
” (+)
and chassis ground (-). Select item no. “
16
” and change
data value to adjust the amplitude “a” to be
minimum
.
5
Connect an oscilloscope to test point “
TP_BVID1
” (+)
and chassis ground (-). Select item no. “
17
” and change
data value to adjust the amplitude “a” to be
minimum
.
(a)
White Level
(a)
白レベル
m
Common center adjustment
1
Receive the 1 line black/white pattern computer signal
with INPUT 2 [RGB] mode.
2
Enter the service mode and select group no. “
200
”.
3
Project only green light component to the screen.
4
Select item no. “
18
” and change data value to obtain
the minimum flicker on the screen.
5
Project only red light component to the screen.
6
Select item no. “
19
” and change data value to obtain
the minimum flicker on the screen.
7
Project only blue light component to the screen.
8
Select item no. “
20
and change data value to obtain
the minimum flicker on the screen.
,
PC white balance adjustment
1
Set projector with 2-lamp mode.
2
Receive the 50% whole-white computer signal with
IN-
PUT 2 [RGB]
mode.
3
Enter the service mode and select group no. “
200
”.
4
Select item no. “
27
” (Green), “
28
” (Red) or “
29
” (Blue),
and change data values respectively to make a proper
white balance.
.
Gamma shift adjustment
1
Set projector with 2-lamp mode.
2
Enter the service mode and select group no. “
210
”.
G-Gamma shift
3
Receive the 100% whole-green component signal with
INPUT 2 [Y/Cb/Cr] mode.
4
Measure luminance on the screen with the luminance
meter. It is A for the reading of luminance meter.
5
Change the signal source to the 50% whole-green
component signal.
6
Select item no. “
21
” and change data value to make the
reading of luminance meter to be A x 0.22.
R-Gamma shift
3
Receive the 100% whole-red component signal with
INPUT 2 [Y/Cb/Cr] mode.
4
Measure luminance on the screen with the luminance
meter. It is A for the reading of luminance meter.
5
Change the signal source to the 50% whole-red com-
ponent signal.
6
Select item no. “
22
” and change data value to make the
reading of luminance meter to be A x 0.22.
B-Gamma shift
3
Receive the 100% whole-blue component signal with
INPUT 2 [Y/Cb/Cr] mode.
4
Measure luminance on the screen with the luminance
meter. It is A for the reading of luminance meter.
5
Change the signal source to the 50% whole-blue com-
ponent signal.
6
Select item no. “
23
” and change data value to make the
reading of luminance meter to be A x 0.22.
⁄0
AV white balance adjustment-1
1
Set projector with 2-lamp mode.
2
Receive the 100% whole-white component signal with
INPUT 2 [Y/Cb/Cr] mode.
3
Enter the service mode and select group no. “
210
”.
4
Select item no. “
24
” (Green), “
25
” (Red) or “
26
” (Blue),
and change data values respectively to make a proper
white balance.
Electrical Adjustments