Sanyo PLC-XU58, Service Manual

Page: 23 / 108

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Electrical Adjustments
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 “
TPG1
” (+) and
chassis ground (-).
4. Select group no. “
0
”, item no. “
0
” and change data
value to adjust the pedestal level and black level to be
the same level.
5. Connect an oscilloscope to test point “
TPR1
” (+) and
chassis ground (-).
6. Select item no. “
1
” and change data value to adjust the
pedestal level and black level to be the same level.
7. Connect an oscilloscope to test point “
TPB1
” (+) and
chassis ground (-).
8. Select item no. “
2
” and change data value to adjust the
pedestal level and black level to be the same level.
P
edestal Lebel
Blac
k Lebel
x
Clamp adjustment [PC]
1. Receive the 16-step grey scale component signal
with Computer2 [Component] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TPG1
” (+) and
chassis ground (-).
4. Select group no. “
0
”, item no. “
0
” and change data
value to adjust the pedestal level and black level to be
the same level.
5. Connect an oscilloscope to test point “
TPR1
” (+) and
chassis ground (-).
6. Select group no. “
0
”, item no. “
1
” and change data
value to adjust the pedestal level and black level to be
the same level.
7. Connect an oscilloscope to test point “
TPB1
” (+) and
chassis ground (-).
8. Select group no. “
0
”, item no. “
2
” and change data
value to adjust the pedestal level and black level to be
the same level.
P
edestal Lebel
Blac
k Lebel
v
Clamp adjustment [COMPONENT]
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 “
TPG1
” (+) and
chassis ground (-).
4. Select group no. “
0
”, item no. “
0
” and change data
value to adjust the pedestal level and black level to be
the same level.
5. Connect an oscilloscope to test point “
TPR1
” (+) and
chassis ground (-).
6. Select item no. “
1
” and change data value to adjust the
pedestal level and black level to be the same level.
7. Connect an oscilloscope to test point “
TPB1
” (+) and
chassis ground (-).
8. Select item no. “
2
” and change data value to adjust the
pedestal level and black level to be the same level.
P
edestal Lebel
Blac
k Lebel
c
Clamp adjustment [AV]
1. Set the lamp mode to "Normal" and then enter the
service mode.
2. Select group no. “
111
”, item no. “
5
” and set data value
to “
1
”.
3. Connect a digital voltmeter to test point “
TP12V1
” (+)
and chassis ground (-). Select item no. “
89
” and
change data value to adjust voltage to be
6.0
±0.1V.
4. Connect a digital voltmeter to test point “
TP12V2
”
(+) and chassis ground (-). Select item no. “
91
” and
change data value to adjust voltage to be
6.0
±0.1V.
5. Connect a digital voltmeter to test point “
TP12V1
” (+)
and chassis ground (-). Select item no. “
90
” and
change data value to adjust voltage to be
13.5
±0.1V.
6. Connect a digital voltmeter to test point “
TP12V2
” (+)
and chassis ground (-). Select item no. “
92
” and
change data value to adjust voltage to be
13.5
±0.1V.
7. Select item no. “
5
” and set data value to “
0
”.
z
Fan Control adjustment