Sanyo PLC-XU350A Service Manual page 31

Electrical Adjustments
4. Auto calibration adjustment [Pc]
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-calibration com-
pleted, "OK" will appear on the screen.
Below adjustments are performed when the above
auto calibration is failed.
Pedestal adjustment [Pc]
1. Enter the service mode.
. Receive the 16-step grey scale computer signal with
computer1 [rGB]
mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
0
4. Select group no. " " , item no. "
value to adjust the pedestal level and black level to be
the same level.
5. Connect an oscilloscope to test point "
and 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.
Gain adjustment [Pc]
1. Enter the service mode.
. Receive the 16-step grey scale computer signal with
computer1 [rGB]
mode.
3. Connect an oscilloscope to test point "
and chassis ground (-).
0
4. Select group no. " " , item no. "
a
tude " " to be minimum by changing the Data value.
5. Connect an oscilloscope to test point "
and chassis ground (-).
0
6. Select group no. " " , item no. "
a
tude " " to be minimum by changing the Data value.
7 . Connect an oscilloscope to test point "
chassis ground (-).
0
8. Select group no. " " , item no. "
a
tude " " to be minimum by changing the Data value.
White Level
(a)
0
" and then change data
tP35G
" (+)
0
" and change data
tP35r
" (+)
tP35B
" (+) and
tP35G
" (+)
3
" and adjust the ampli-
tP35r
" (+)
4
" and adjust the ampli-
tP35B
" (+) and
5
" and adjust the ampli-
5. Auto calibration adjustment [component]
1. Enter the service mode.
. Receive the 8 color 100% color bar 480i-component
computer2 [component]
signal with
3. To start the auto-calibration for Component adjust-
ment, select group no. "
change data value from "
bration completed, "OK" will appear on the screen.
Below adjustments are performed when the above
auto calibration is failed.
Pedestal adjustment [component]
1. Enter the service mode.
. Receive the 16-step grey scale 480i-component signal
computer2 [component]
with
3. Connect an oscilloscope to test point "
and chassis ground (-).
4. Select group no. "
value to adjust the pedestal level and black level to be
the same level.
5. Connect an oscilloscope to test point "
and chassis ground (-).
1
6. Select item no. "
the pedestal level and black level to be the same lev-
el.
7 . Connect an oscilloscope to test point "
and chassis ground (-).
2
8. Select item no. "
the pedestal level and black level to be the same lev-
el.
Gain adjustment [component]
1. Enter the service mode.
. Receive the 16-step grey scale 480i-component signal
computer2 [component]
with
3. Connect an oscilloscope to test point "
and chassis ground (-).
0
4. Select group no. "
a
tude " " to be minimum by changing the Data value.
(a)
-31-
mode.
260 0
" , item no. " " and then
0 1
" to " " . After the auto-cali-
mode.
tP35G
0 0
" , item no. " " and change data
tP35r
" and change data value to adjust
tP35B
" and change data value to adjust
mode.
tP35G
3
" , item no. " " and adjust the ampli-
White Level
" (+)
" (+)
" (+)
" (+)