Sanyo PLC-XW55A Service Manual page 26

Electrical Adjustments
x Fan Control adjustment
1. Eenter the service mode.
. Connect a digital voltmeter to test point "
and chassis ground (-). Select group no. "
95
no. " " and change data value to adjust voltage to be
13.5 ±0.1V
.
3. Connect a digital voltmeter to test point "
and chassis ground (-). Select item no. "
data value to adjust voltage to be
4. Connect a digital voltmeter to test point "
(+) and chassis ground (-). Select item no. "
change data value to adjust voltage to be
5. Connect a digital voltmeter to test point "
(+) and chassis ground (-). Select item no. "
change data value to adjust voltage to be
c Pedestal adjustment [480i]
1. Receive the 16-step grey scale 480i-component signal
computer1 [component]
with
. Enter the service mode.
3. Connect an oscilloscope to test point "
chassis ground (-).
0
4. Select group no. " ", item no. "
ue to adjust the pedestal level and black level to be the
same level.
5. Connect an oscilloscope to test point "
chassis ground (-).
1
6. Select item no. " " and change data value to adjust the
pedestal level and black level to be the same level.
7. Connect an oscilloscope to test point "
chassis ground (-).
2
8. Select item no. " " and change data value to adjust the
pedestal level and black level to be the same level.
tPFANA
" (+)
250
", item
tPFANB
" (+)
97
" and change
13.5 ±0.1V
.
tPFANA
"
94
" and
5.0 ±0.1V
.
tPFANB
"
96
" and
5.0 ±0.1V
.
mode.
tPG1
" (+) and
0
" and change data val-
tPr1
" (+) and
tPB1
" (+) and
-6-
v Gain adjustment [480i]
1. Receive the 16-step grey scale 480i-component signal
computer1 [component]
with
. Enter the service mode.
3. Connect an oscilloscope to test point "
chassis ground (-).
0
4. Select group no. " ", item no. "
a
tude " " to be minimum by changing the Data value.
White Level
(a)
b Auto Calibration adjustment
1. Enter the service mode.
. Receive the 16-step grey scale computer signal with
computer1 [rGB]
mode.
3. To start the auto-calibration for PC adjustment, select
260
group no. " ", item no. "
0 1
value from " " to " ". After the auto-calbration com-
pleted, "OK" will appear on the screen.
4. Receive the 16-step grey scale composite video sig-
Video
nal with mode.
5. To start the auto-calibration for Video adjustment,
260
select group no. " ", item no. "
0
data value from " " to "
completed, "OK" will appear on the screen.
n Black Reference adjustment
1. Receive the 16-step grey scale computer signal with
computer1 [rGB]
mode.
. Enter the service mode.
3. Connect an oscilloscope to test point "
chassis ground (-).
100
4. Select group no. " ", item no. "
value to adjust amplitude "
5. Connect an oscilloscope to test point "
chassis ground (-).
125
6. Select item no. " " and change data value to adjust
a 10.0 ±0.1V
amplitude " " to be
7. Connect an oscilloscope to test point "
chassis ground (-).
126
8. Select item no. " " and change data value to adjust
a 10.0 ±0.1V
amplitude " " to be
(a)
mode.
tPG1
" (+) and
3
" and adjust the ampli-
0
" and then change data
0
" and then change
1
". After the auto-calbration
tPG1
" (+) and
124
" and change data
a 10.0 ±0.1V
" to be .
tPr1
" (+) and
.
tPB1
" (+) and
.
black level
black level