Sanyo PLC-XT10 Service Manual page 26

Electrical Adjustments
3
NRS adjustment
1. Receive the 16-step gray scale computer signal with
Computer 1 [Analog RGB] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
5
4. Select group no. " ", Item no. "
2.0
tude "a" to be ±0.1V by changing the Data value.
6
5. Select Item no. " " and adjust the amplitude "b" to be
7.5
±0.1V by changing the Data value.
(a)
4
Pedestal adjustment [PC]
1. Receive the 16-step gray scale computer signal with
Computer 1 [Analog RGB] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
chassis ground (-).
5
4. Select group no. " ", Item no. "
black level to be maximum amplitude by changing the
Data value.
5. Connect an oscilloscope to test point "
chassis ground (-).
12
6. Select Item no. " " and adjust the black level to be
maximum amplitude by changing the Data value.
7. Connect an oscilloscope to test point "
chassis ground (-).
13
8. Select Item no. " " and adjust the black level to be
maximum amplitude by changing the Data value.
Black Lebel
Pedestal Lebel
TP2531
" (+)
7
" and adjust the ampli-
(b)
GND
TP531
" (+) and
11
" and adjust the
TP501
" (+) and
TP561
" (+) and
5
Video Gain adjustment [PC]
1. Receive the 16-step gray scale computer signal with
Computer 1 [Analog RGB] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
4
4. Select group no. " ", Item no. "
level to be minimum amplitude by changing the Data
value.
5. Connect an oscilloscope to test point "
and chassis ground (-).
4
6. Select Item no. " " and adjust the white level to be
minimum amplitude by changing the Data value.
7. Connect an oscilloscope to test point "
and chassis ground (-).
5
8. Select Item no. " " and adjust the white level to be
minimum amplitude by changing the Data value.
6
Black Level adjustment [PC]
1. Receive the 16-step gray scale computer signal with
Computer 1 [Analog RGB] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
5
4. Select group no. " ", Item no. "
10.0
amplitude "a" to be
Data value.
5. Connect an oscilloscope to test point "
and chassis ground (-).
4
6. Select Item no. " " and adjust the amplitude "a" to be
10.0
±0.1V by changing the Data value.
7. Connect an oscilloscope to test point "
and chassis ground (-).
5
8. Select Item no. " " and adjust the amplitude "a" to be
10.0
±0.1V by changing the Data value.
-26-
TP531
" (+)
3
" and adjust the white
TP501
" (+)
TP561
" (+)
White Level
(a)
TP531
" (+)
3
" and adjust the
±0.1V by changing the
TP501
" (+)
TP561
" (+)
black level
(a)
black level