Output Voltage Adjustment; Fan Voltage Adjustment - Sanyo plc-wu3800 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 pins 1 (+) and 2 (-)
of K6A.
2. Adjust the voltage by using VR601 as following.
AC Input
230V
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. Fan Voltage adjustment

Equipment Digital voltmeter
1. Enter the service mode.
2. Adjust the voltage on each test point by changing
the data values of Group - No.
Group - No. Test Points
250 - 0
TPFANA
250 - 1
TPFANA
250 - 2
TPFANB
250 - 3
TPFANB
250 - 4
TPFANC
250 - 5
TPFANC
2 .Center Voltage Adjustment
Input mode Computer 2 (RGB)
Input signal XGA Computer signal
Signal pattern 16-step gray scale
Equitment Digital voltmeter
1. Enter the service mode.
"106"
2. Select Group ,No.
TP VMIDR to be 7.00±0.05Vdc
of
Reading
370V ±2V
Adjustment value
4.7 ±0.1Vdc
13.5 ±0.1Vdc
5.0 ±0.1Vdc
13.0 ±0.1Vdc
5.0 ±0.1Vdc
13.5 ±0.1Vdc
"0"
to adjust the voltage
.
3 .Black-black Voltage Adjustment
Input mode Computer 2 (RGB)
Input signal XGA Computer signal
Signal pattern 16-step gray scale
Equitment Oscilloscope
1. Enter the service mode.
2. Adjust the amplitude
point by changing the data values of Group - No.
Group - No. Test Points
106 - 1
TP35R
106 - 2
TP35G
106 - 3
TP35B
4. 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
follows;
Data value: 0
Data value: 20
If the mounted LCD panel type and set Panel mode are
differ, take the step below.
3. Panel Type Mode Setting
"290"
Select Group
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 according to your
selection.
-29-
"D"
of waveform at each test
Adjustment value
10.00 ±0.05Vpp
10.00 ±0.05Vpp
10.00 ±0.05Vpp
"0"
,No. and Check the data value as
For L -Type of LCD Panel
For R-Type of LCD panel
"1"
, No. and change data value from