Sanyo PLC-XT35 Service Manual page 60

Electrical Adjustment
c PC-Auto Calibration adjustment
1. Enter the service mode.
. Receive the 16-step grey scale computer signal with
Input1 [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.
c PC-Pedestal adjustment
1. Enter the service mode.
. Receive the 16-step grey scale computer signal with
Input1 [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 "
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.
c PC-Gain adjustment
1. Enter the service mode.
. Receive the 16-step grey scale computer signal with
Input1 [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 "
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
" (+) and
tP35B
" (+) and
tP35G
" (+)
3
" and adjust the ampli-
tP35r
" (+) and
4
" and adjust the ampli-
tP35B
" (+) and
5
" and adjust the ampli-
v Video-Auto Calibration adjustment
1. Enter the service mode.
. Receive the 16-step grey scale composite video sig-
Input3 [Video]
nal with
3. To start the auto-calibration for Video adjustment, se-
260
lect group no. "
0
data value from "
completed, "OK" will appear on the screen.
b 480i-Auto Calibration adjustment
1. Enter the service mode.
. Receive the 16-step grey scale 480i-component video
Input2 [component]
signal with
3. To start the auto-calibration for 480i-component ad-
justment, select group no. "
change data value from "
bration completed, "OK" will appear on the screen.
Perform these manual adjustments instead of the
Auto-calibration adjustment from [3] to [5] when
the auto-calibration is failed.
v Video-Gain adjustment
1. Enter the service mode.
. Receive the 16-step grey scale composite video signal
Input3 [Video]
with
3. Connect an oscilloscope to test point "
and chassis ground (-).
4. Select group no. "
a
amplitude " " to be minimum by changing the Data
value.
(a)
b 480i-Gain adjustment
1. Enter the service mode.
. Receive the 16-step grey scale 480i-component video
Input2 [component]
signal with
3. Connect an oscilloscope to test point "
and chassis ground (-).
4. Select group no. "
a
amplitude " " to be minimum by changing the Data
value.
(a)
-60-
mode.
0
", item no. " " and then change
1
" to " ". After the auto-calibration
mode.
260 0
", item no. " " and then
0 1
" to " ". After the auto-cali-
mode.
tP35G
20 2
", item no. " " and adjust the
White Level
mode.
tP35G
20 0
", item no. " " and adjust the
White Level
" (+)
" (+)