Sanyo PLC-XU87 Service Manual page 28

Electrical Adjustments
x Panel Type Check and Setting
* Before setting, you need to check which type of LCD pan-
el is placed on the projector according to the item "LCD
Panel/Prism Ass'y removal" in the chapter "Optical Parts
Disassembly".
1. Enter the service mode.
2. Panel Type Check
290
Select group no. " ", item no. "
value as follows;
Data value: 0 For L-Type of LCD Panel
Data value: 20 For R-Type of LCD panel
3. Panel Type Setting
290
Select group no. " ", item no. "
value from 10 to 0 or 20 depending on your LCD Panel
type. When the data value reaches 0 or 20, it returns
to 10 quickly. The gamma-characteristics changes ac-
cording to your selection.
c Auto Calibration adjustment [PC]
1. Enter the service mode.
2. Receive the 16-step grey scale computer signal with
computer2 [rGB]
mode.
3. To start the auto-calibration for PC adjustment, select
260
group no. " ", item no. "
0 1
ue from " " to " ". After the auto-calbration completed,
"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.
2. Receive the 16-step grey scale computer signal with
computer2 [rGB]
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.
0
". Check the data
1
" and change data
0
" and then change data val-
tP35G
" (+) and
0
" and change data val-
tP35r
" (+) and
tP35B
" (+) and
Gain adjustment [Pc]
1. Enter the service mode.
2. Receive the 16-step grey scale computer signal with
computer2 [rGB]
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.
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.
(a)
v Auto Calibration adjustment [Component]
1. Enter the service mode.
2. Receive the 16-step grey scale 480i-component sig-
computer2 [component]
nal 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.
2. Receive the 16-step grey scale 480i-component signal
computer2 [component]
with
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.
-28-
mode.
tP35G
" (+) and
3
" and adjust the ampli-
tP35r
" (+) and
4
" and adjust the ampli-
tP35B
" (+) and
5
" and adjust the ampli-
White Level
mode.
260 0
", item no. " " and then
0 1
" to " ". After the auto-cal-
mode.
tP35G
" (+) and
0
" and change data val-
tP35r
" (+) and
tP35B
" (+) and