-7-
Electrical Adjustments
Presetting
1. Receive the 16-step grey scale computer signal.
2. Set to COMPUTER mode.
[R-SIGNAL CENTER ADJUSTMENT]
3. Connect a digital voltmeter to test point “TP511” (+)
and chassis ground (-).
4. Adjust voltage to be 7.30 ±0.05V by using VR521.
[G-SIGNAL CENTER ADJUSTMENT]
5. Connect a digital voltmeter to test point “TP512” (+)
and chassis ground (-).
6. Adjust voltage to be 7.30 ±0.05V by using VR551.
[B-SIGNAL CENTER ADJUSTMENT]
7. Connect a digital voltmeter to test point “TP513” (+)
and chassis ground (-).
8. Adjust voltage to be 7.30 ±0.05V by using VR581.
SIGNAL CENTER ADJUSTMENT
1. Receive the 16-step grey scale computer signal.
2. Set to COMPUTER mode.
3. Connect an oscilloscope to test point “TP3581” (+)
and chassis ground (-).
4. Adjust “a” to be 5.0 ±0.1V by using VR3561.
(a)
NRS ADJUSTMENT
PC-GAMMA OFF ADJUSTMENT
1. Receive the 16-step gray scale computer signal.
2. Set to COMPUTER mode.
3. Connect an oscilloscope to test point “TP512” (+) and
chassis ground (-).
4. Enter the service mode, select item no. “0” and change
data value to adjust “a” to be 1.60 ±0.01Vp-p.
[AV-GAMMA OFF ADJUSTMENT]
5. Receive the 16-step gray scale video signal.
6. Set to VIDEO mode.
7. Connect an oscilloscope to test point “TP512” (+) and
chassis ground (-).
8. Select item no. “0” and change data value to adjust “a”
to be 1.70 ±0.01Vp-p.
* This adjustment should be carried out before
adjusting PC/AV-VIDEO ADJUSTMENT-1 and 2.
PC/AV GAMMA OFF ADJUSTMENT
(a)
Содержание SW15 - PLC SVGA LCD Projector
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