Eiki LC-X71 LC-X71L - Manual (Page 26)

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1. Receive the 16-step gray scale computer signal with
Input 1 [RGB(Analog)] mode.
2. Enter the service mode.
3. Connect a digital voltmeter to test point “
TP531 ” (+)
and chassis ground (-).
4. Select group no. “ 200 ”, item no. “ 0 ” and change data
value to adjust the voltage to be 7.5 ±0.05Vdc.
5. Connect a digital voltmeter to test point “ TP561 ” (+)
and chassis ground (-).
6. Select item no. “ 1 ” and change data value to adjust
the voltage to be 7.5 ±0.05Vdc.
7. Connect a digital voltmeter to test point “ TP501 ” (+)
and chassis ground (-).
8. Select item no. “ 2 ” and change data value to adjust
the voltage to be 7.5 ±0.05Vdc.
v
Video Center adjustment
Electrical Adjustments
1. Receive the 16-step gray scale computer signal with
Input 1 [RGB(Analog)] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TP533 ” (+) and
chassis ground (-).
4. Select group no. “ 200 ”, item no. “ 3 ” and change data
value to adjust amplitude “a” to be 10.8 ±0.1V.
5. Select item no. “ 6 ” and change data value to adjust
amplitude “b” to be 3.8 ±0.1V.
6. Connect an oscilloscope to test point “ TP563 ” (+).
7. Select group no. “ 200 ”, item no. “ 4 ” and change data
value to adjust amplitude “a” to be 10.8 ±0.1V.
8. Select item no. “ 7 ” and change data value to adjust
amplitude “b” to be 3.8 ±0.1V.
9. Connect an oscilloscope to test point “ TP503 ” (+) .
10. Select group no. “ 200 ”, item no. “ 5 ” and change data
value to adjust amplitude “a” to be 10.8 ±0.1V.
11. Select item no. “ 8 ” and change data value to adjust
amplitude “b” to be 3.8 ±0.1V.
(a) (b)
b
PSIG adjustment
1. Receive the 16-step gray scale computer signal with
Input 1 [RGB(Analog)] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TP531 ” (+)
and chassis ground (-).
4. Select group no. “ 200 ”, item no. “ 9 ” and change data
value to adjust amplitude “a” to be 10.6 ±0.1V.
5. Connect an oscilloscope to test point “ TP561 ” (+)
and chassis ground (-).
4. Select group no. “ 200 ”, item no. “ 10 ” and change
data value to adjust amplitude “a” to be 10.6 ±0.1V.
3. Connect an oscilloscope to test point “ TP501 ” (+)
and chassis ground (-).
4. Select group no. “ 200 ”, item no. “ 11 ” and change
data value to adjust amplitude “a” to be 10.6 ±0.1V.
(a)
black level
black level
n
PC Black Level adjustment
1. Enter the service mode.
2. Connect a digital multimeter to test point “
A ” (+) and
chassis ground (-). (as shown below)
3. Select group no. “ 140 ”, item no. “ B ” and change data
value to adjust the fan max. output voltage to be 13.5
±0.05V.
4. Select group no. “ 140 ”, item no. “ C ” and change data
value to adjust the fan min. output voltage to be 5.0
±0.05V.
5. Each fan should be adjusted refer to item 2 - 4.
Note:
The location of each fan is refer to "FAN control stage" of
Chassis Description.
c
Fan Voltage adjustment
Test point "A" Item No."B"
TPFN3 0
TPFN7 2
TPFN6 4
TPFN4 6
FAN1 8
FAN2 10
Item No."C" Fan No.
1 FN903
3 FN907
5 FN906
7 FN904
9 FN901
FN902
11 FN905