Output Voltage Adjustment - Sanyo PLC-XU355A Service Manual

Electrical Adjustments

output Voltage adjustment

After replacing the Power Board readjust the Output
voltage adjustment as follows.
1. Connect a digital voltmeter to RED WIRE (+) and
BLACK WIRE (-).
. Adjust the voltage by using VR61 as following.
AC Input
30V
Caution:
Be sure to connect the lamp when taking this adjust-
ment.
* This adjustment is not required even if the power
board is replaced because this adjustment is carried
out before parts shipment.
1. Panel type check and Setting
* Before setting, you need to check which type of LCD
panel 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.
. Panel Type Check
290
Select group no. " ", item no. "
value as follows;
Data value: 0 For L-Type of LCD Panel
Data value: 0 For R-Type of LCD panel
3. Panel Type Setting
290
Select group no. " ", item no. "
value from 10 to 0 or 0 depending on your LCD
Panel type. When the data value reaches 0 or 0,
it returns to 10 quickly. The gamma-characteristics
changes according to your selection.
Note:
Be careful to take this adjustment. The value of
gamma adjustment data will be reset and cannot be
restored if you change the mode of LCD panel type.
Reading
374V ±1V
0
". Check the data
1
" and change data
2. Fan control adjustment
1. Enter the service mode.
. Connect a digital voltmeter to test point "
and chassis ground (-). Select group no. "
0
no. " " and change data value to adjust voltage to be
5.0 ±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. "
data value to adjust voltage to be
5. Connect a digital voltmeter to test point "
and chassis ground (-). Select item no. "
data value to adjust voltage to be
6. Connect a digital voltmeter to test point "
and chassis ground (-). Select item no. "
data value to adjust voltage to be
7. Connect a digital voltmeter to test point "
and chassis ground (-). Select item no. "
data value to adjust voltage to be
3 .reference Voltage Adjustment
1. Enter the service mode.
. Receive the 16-step grey scale computer signal
computer 1 [rGB]
with
101
3. Select group no. "
just the voltage of tP_VMIdG to be
±0.01V
.
101
4. Select group no. "
the voltage of tP35G to make the amplitude
d[Vpp] 10.00 ±0.05V
" " to be
-30-
tPFANA
250
tPFANA
1
" and change
13.5 ±0.1V
.
tPFANB
2
" and change
4.5 ±0.1V
.
tPFANB
3
" and change
13.5 ±0.1V
.
tPFANc
4
" and change
5.0 ±0.1V
.
tPFANc
5
" and change
13.5 ±0.1V
.
mode.
12
", item no. " " to ad-
7.00
14
", item no. " " to adjust
.
" (+)
", item
" (+)
" (+)
" (+)
" (+)
" (+)