Sanyo PLC-XU40, Руководство по обслуживанию

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Electrical Adjustments
1. Receive the 16-step grey scale computer signal with
Computer [Analog RGB] mode.
2. Enter the service mode.
3. Connect a digital voltmeter to test point “
TP505R
”
(+) and chassis ground (-).
4. Select item no. “
1
and adjust the voltage to be
7.50
±0.1Vdc by changing the Data value.
5. Connect a digital voltmeter to test point “
TP503G
”
(+) and chassis ground (-).
6. Select item no. “
2
” and adjust the voltage to be
7.50
±0.1Vdc by changing the Data value.
7. Connect a digital voltmeter to test point “
TP501B
”
(+) and chassis ground (-).
8. Select item no. “
3
” and adjust the voltage to be
7.50
±0.1Vdc by changing the Data value.
x
Signal Center adjustment
1. Receive the 16-step gray scale computer signal with
Computer [Analog RGB] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TP3501
” (+)
and chassis ground (-).
4. Select item no. “
22
” and adjust the amplitude “a” to be
9.5
±0.1V by changing the Data value.
5. Select item no. “
23
” and adjust the amplitude “b” to be
1.0
±0.1V by changing the Data value.
(a) (b)
c
PSIG adjustment
1. Receive the 16-step gray scale computer signal with
Computer [Analog RGB] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TP505R
” (+)
and chassis ground (-).
4. Select item no. “
4
” and adjust the amplitude “a” to be
minimum by changing the Data value.
5. Connect an oscilloscope to test point “
TP503G
” (+)
and chassis ground (-).
6. Select item no. “
5
” and adjust the amplitude “a” to be
minimum by changing the Data value.
7. Connect an oscilloscope to test point “
TP501B
” (+)
and chassis ground (-).
8. Select item no. “
6
” and adjust the amplitude “a” to be
minimum by changing the Data value.
(a)
White Level
v
Gain adjustment [PC]
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 “
TP505R
” (+)
and chassis ground (-).
4. Select item no. “
4
” and adjust the amplitude “a” to be
minimum by changing the Data value.
5. Connect an oscilloscope to test point “
TP503G
” (+)
and chassis ground (-).
6. Select item no. “
5
” and adjust the amplitude “a” to be
minimum by changing the Data value.
7. Connect an oscilloscope to test point “
TP501B
” (+)
and chassis ground (-).
8. Select item no. “
6
” and adjust the amplitude “a” to be
minimum by changing the Data value.
(a)
White Level
b
Gain adjustment [Video]