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Electrical Adjustments
c Video Center adjustment
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 “
TPV1G” (+)
and chassis ground (-).
4. Select group no. “
200”, item no. “0” and change data
value to adjust the voltage to be 7.0 ±0.05Vdc.
5. Connect a digital voltmeter to test point “TPV1R” (+)
and chassis ground (-).
6. Select item no. “
1” and change data value to adjust
the voltage to be 7.0 ±0.05Vdc.
7. Connect a digital voltmeter to test point “TPV1B” (+)
and chassis ground (-).
8. Select item no. “
2” and change data value to adjust
the voltage to be 7.0 ±0.05Vdc.
n PC Input adjustment
1. Receive the 16-step gray scale computer signal with
Input 1 [RGB(Analog)] mode.
2. Enter the service mode.
3. Select group no. “
680”, item no. “0” and change data
value from 0 to 1. The projector starts self-adjust
-
ment. When the adjustment completes correctry,
"OK" will appear on the screen. If "NG" appears, try
adjustment again.
v NRS adjustment
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 “TPNRSA” (+)
and chassis ground (-).
4. Select group no. “
200”, item no. “3” and change data
value to adjust the voltage to be 2.5 ±0.05Vdc.
5. Connect a digital voltmeter to test point “TPNRSB” (+)
and chassis ground (-).
6. Select item no. “
4” and change data value to adjust
the voltage to be 7.5 ±0.05Vdc.
b Reference Voltages adjustment
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 “TPREF_G”
(+) and chassis ground (-).
4. Select group no. “
200”, item no. “6” and change data
value to adjust the voltage to be 9.38 ±0.05Vdc.
5. Connect a digital voltmeter to test point “TPREG_R”
(+) and chassis ground (-).
6. Select item no. “
7” and change data value to adjust
the voltage to be 9.38 ±0.05Vdc.
7. Connect a digital voltmeter to test point “TPREF_B”
(+) and chassis ground (-).
8. Select item no. “
8” and change data value to adjust
the voltage to be 9.38 ±0.05Vdc.
m A/V Input adjustment
1. Receive the 16-step grey scale comosite video signal
with Input 3 [Video] mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TP35G” (+)
and chassis ground (-).
4. Select group no. “
300”, item no. “2” and adjust the
amplitude “a” to be minimum by changing the Data
value.
5. Receive the 16-step grey scale component video
signal (Y/Cb/Cr 480p) with Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
6. Select group no. “
300”, item no. “0” and adjust the
amplitude “a” to be minimum by changing the Data
value.
7. Receive the 16-step grey scale component video sig
-
nal (Y/Pb/Pr 1080i-60) with Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
8. Select item no. “
0” and adjust the amplitude “a” to be
minimum by changing the Data value.
9. Receive the 16-step grey scale component video sig
-
nal (Y/Pb/Pr 720p-60) with Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
10. Select item no. “
0” and adjust the amplitude “a” to
be minimum by changing the Data value.
11. Receive the 16-step grey scale component video sig
-
nal (Y/Pb/Pr 720p-60) with Input 3 [Y,Pb/Cb,Pr/Cr]
mode.
12. Select item no. “
0” and adjust the amplitude “a” to
be minimum by changing the Data value.
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