- 26 -
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.
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.
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
