Sanyo PLC-XU56 Service Manual page 24

Electrical Adjustments
b
Sub Gain adjustment [PC]
1. Receive the 16-step grey scale computer signal with
Computer2 [RGB] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
9
4. Select group no. " ", item no. "
minimum
tude "a" to be
5. Connect an oscilloscope to test point "
chassis ground (-).
2
6. Select item no. " " and adjust the amplitude "a" to be
minimum
by changing the Data value.
7. Connect an oscilloscope to test point "
chassis ground (-).
3
8. Select item no. " " and adjust the amplitude "a" to be
minimum
by changing the Data value.
White Level
(a)
n
Sub Gain adjustment [Video]
1. Receive the 16-step grey scale composite video sig-
nal with Video [Video] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
9
4. Select group no. " ", item no. "
tude "a" to be minimum by changing the Data value.
5. Connect an oscilloscope to test point "
chassis ground (-).
2
6. Select item no. " " and adjust the amplitude "a" to be
minimum by changing the Data value.
7. Connect an oscilloscope to test point "
chassis ground (-).
3
8. Select item no. " " and adjust the amplitude "a" to be
minimum by changing the Data value.
White Level
(a)
TPG1
" (+)
1
" and adjust the ampli-
by changing the Data value.
TPR1
" (+) and
TPB1
" (+) and
TPG1
" (+)
1
" and adjust the ampli-
TPR1
" (+) and
TPB1
" (+) and
m
Video Center adjustment
1. Receive the 16-step grey scale computer signal with
Computer2 [RGB] mode.
2. Enter the service mode
3. Connect a digital voltmeter to test point "
and chassis ground (-).
10
4. Select group no. "
value to adjust the voltage to be
5. Connect a digital voltmeter to test point "
and chassis ground (-).
1
6. Select item no. " " and change data value to adjust
7.0
the voltage to be
7. Connect a digital voltmeter to test point "
and chassis ground (-).
2
8. Select item no. " " and change data value to adjust
7.0
the voltage to be
9. Connect a digital voltmeter to test point "
and chassis ground (-).
6
10. Select item no. " " and change data value to adjust
8.0
the voltage to be
11. Connect a digital voltmeter to test point "
and chassis ground (-).
7
12. Select item no. " " and change data value to adjust
8.0
the voltage to be
13. Connect a digital voltmeter to test point "
and chassis ground (-).
8
14. Select item no. " " and change data value to adjust
8.0
the voltage to be
,
Black Reference adjustment
1. Receive the 16-step grey scale computer signal with
Computer2 [RGB] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
10
4. Select group no. "
value to adjust amplitude "a" to be
5. Connect an oscilloscope to test point "
chassis ground (-).
4
6. Select item no. " " and change data value to adjust
10.0
amplitude "a" to be
7. Connect an oscilloscope to test point "
chassis ground (-).
5
8. Select item no. " " and change data value to adjust
10.0
amplitude "a" to be
black level
black level
-24-
TPGV1
0
", item no. " " and change data
7.0
±0.05V.
TPRV1
±0.05V.
TPBV1
±0.05V.
TPGV2
±0.05V.
TPRV2
±0.05V.
TPBV2
±0.05V.
TPG1
" (+)
3
", item no. " " and change data
10.0
±0.1V.
TPR1
" (+) and
±0.1V.
TPB1
" (+) and
±0.1V.
(a)
" (+)
" (+)
" (+)
" (+)
" (+)
" (+)