Sanyo PLC-WK2500 Service Manual page 32

Electrical Adjustments
Gain adjustment [PC]
1. Enter the service mode.
2. 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
amplitude " " 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
amplitude " " 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
amplitude " " to be minimum by changing the Data
value.
White Level
(a)
4. Auto Calibration adjustment [Component]
1. Enter the service mode.
2. Receive the 8 color 100% color bar 480i-component
tP35G
" (+)
signal with
3. To start the auto-calibration for Component adjust-
3
" and adjust the
ment, select Group No. "
change data value from "
bration completed, "OK" will appear on the screen.
tP35r
" (+)
Below adjustments are performed when the above
4
" and adjust the
auto calibration is failed.
tP35B
" (+) and
Pedestal adjustment [Component]
1. Enter the service mode.
5
" and adjust the 2. Receive the 16-step grey scale 480i-component signal
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 (-).
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 (-).
8. Select Item No. "
the pedestal level and black level to be the same lev-
el.
Gain adjustment [Component]
1. Enter the service mode.
2. Receive the 16-step grey scale 480i-component signal
with
3. Connect an oscilloscope to test point "
and chassis ground (-).
4. Select Group No. "
amplitude "
value.
-32-
Computer1 [Component]
260
" , Item No. "
0
" to "
Computer1 [Component]
0
" , Item No. "
1
" and change data value to adjust
2
" and change data value to adjust
Computer1 [Component]
0
" , Item No. "
a
" to be minimum by changing the Data
White Level
(a)
mode.
0
" and then
1
" . After the auto-cali-
mode.
tP35G
" (+)
0
" and change data
tP35r
" (+)
tP35B
" (+)
mode.
tP35G
" (+)
3
" and adjust the