Eiki LC-XB100A, Service Manual

Page: 31 / 118

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Electrical Adjustments
1. Enter the service mode.
2. Connect a digital voltmeter to test point “
tPFaNa
”
(+) and chassis ground (-). Select group no. “
250
”,
item no. “
0
” and change data value to adjust voltage
to be
5.0 ±0.1V
.
3. Connect a digital voltmeter to test point “
tPFaNa
”
(+) and chassis ground (-). Select item no. “
1
” and
change data value to adjust voltage to be
13.5
±0.1V
.
4. Connect a digital voltmeter to test point “
tPFaNB
”
(+) and chassis ground (-). Select item no. “
2
” and
change data value to adjust voltage to be
4.5 ±0.1V
.
5. Connect a digital voltmeter to test point “
tPFaNB
”
(+) and chassis ground (-). Select item no. “
3
”
and change data value to adjust voltage to be
13.5
±0.1V
.
6. Connect a digital voltmeter to test point “
tPFaNc
”
(+) and chassis ground (-). Select item no. “
4
” and
change data value to adjust voltage to be
5.0 ±0.1V
.
7. Connect a digital voltmeter to test point “
tPFaNc
” (+)
and chassis ground (-). Select item no. “
5
” and change
data value to adjust voltage to be
13.5 ±0.1V
.
2. Fan control adjustment
1. Enter the service mode.
2. Receive the 16-step grey scale computer signal
with
computer 1 [rGB]
mode.
3. Select group no. “
101
”, item no. “
12
” to ad-
just the voltage of tP_VMIdG to be
7.00
±0.01V
.
4. Select group no. “
101
”, item no. “
14
” to adjust
the voltage of tP35G to make the amplitude
“
d[Vpp]
” to be
10.00 ±0.05V
.
3 .reference Voltage adjustment
㪛㩷㪲㪭㫇㫇㪴
* 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.
2. Panel Type Check
Select group no. “
290
”, item no. “
0
”. Check the data
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
Select group no. “
290
”, item no. “
1
” and change
data 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-characteris-
tics changes according to your selection.
1. Panel type check and Setting
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.
After replacing the Power Board readjust the Output
voltage adjustment as follows.
1. Connect a digital voltmeter to RED WIRE (+) and
BLACK WIRE (-).
2. Adjust the voltage by using VR621 as following.
AC Input Reading
230V 374V �1V
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.
output Voltage adjustment