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Electrical Adjustments
1. Enter the service mode.
2. Receive the 16-step grey scale computer signal with
Computer1 [RGB] mode.
3. To start the auto-calibration for PC adjustment, select
group no. “260”, item no. “0” and then change data
value from “0” to “1”. After the auto-calibration com-
pleted, "OK" will appear on the screen.
c Auto Calibration adjustment [PC]
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 “TPFANB” (+)
and chassis ground (-). Select item no. “2” and change
data value to adjust voltage to be 5.0 ±0.1V.
4. Connect a digital voltmeter to test point “TPFANA”
(+) and chassis ground (-). Select item no. “94”
and change data value to adjust voltage to be 13.5
±0.1V.
5. Connect a digital voltmeter to test point “TPFANB”
(+) and chassis ground (-). Select item no. “96”
and change data value to adjust voltage to be 13.5
±0.1V.
x Fan Control adjustment
Pedestal adjustment [PC]
1. Enter the service mode.
2. Receive the 16-step grey scale computer signal with
Computer1 [RGB] mode.
3. Connect an oscilloscope to test point “TP_G1” (+)
and chassis ground (-).
4. Select group no. “0”, item no. “0” and change data
value to adjust the pedestal level and black level to be
the same level.
5. Connect an oscilloscope to test point “TP_R1” (+) and
chassis ground (-).
6. Select item no. “1” and change data value to adjust the
pedestal level and black level to be the same level.
7. Connect an oscilloscope to test point “TP_B1” (+) and
chassis ground (-).
8. Select item no. “2” and change data value to adjust the
pedestal level and black level to be the same level.
Pedestal Lebel
Black Lebel
Gain adjustment [PC]
1. Enter the service mode.
2. Receive the 16-step grey scale computer signal with
Computer1 [RGB] mode.
3. Connect an oscilloscope to test point “TP35G” (+)
and chassis ground (-).
4. Select group no. “0”, item no. “3” and adjust the ampli-
tude “a” to be minimum by changing the Data value.
5. Connect an oscilloscope to test point “TP35R” (+) and
chassis ground (-).
6. Select group no. “0”, item no. “4” and adjust the ampli-
tude “a” to be minimum by changing the Data value.
7. Connect an oscilloscope to test point “TP35B” (+) and
chassis ground (-).
8. Select group no. “0”, item no. “5” and adjust the ampli-
tude “a” to be minimum by changing the Data value.
Below adjustments are performed when the above auto
calibration is failed.
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