Sanyo PLC-XW10, Руководство по обслуживанию

Страница: 27 / 92

-27-
1. Receive the 16-step gray scale computer signal.
2. Set to COMPUTER mode.
3. Connect an oscilloscope to test point “TP503G” (+)
and chassis ground (-).
4. Enter to the service mode, select item no. “3” and
change data value to adjust “a” to be maximum.
(a)
S/H CLOCK ADJUSTMENT
Electrical Adjustments
Presetting
1. Input the 16-step gray scale video signal and com-
puter signal.
[PC/AV-VIDEO ADJUSTMENT]
2. Connect an oscilloscope to test point “TP503G” (+)
and chassis ground (-).
3. Enter to the service mode, select item no. “15” and
change data value to adjust “b” to be 1.50 ±0.01Vp-p
at each VIDEO and COMPUTER mode.
4. Select COMPUTER mode, select item no. “12” and
change data value to adjust “a” to be 4.00 ±0.01Vp-p.
5. Select VIDEO mode, select item no. “12” and change
data value to adjust “a” to be 4.00 ±0.01Vp-p.
[R-VIDEO ADJUSTMENT]
6. Connect an oscilloscope to test point “TP501R” (+)
and chassis ground (-).
7. Select COMPUTER mode, and select item no. “13”
and change data value to adjust “a” to be 4.00
±0.01Vp-p.
8. Select VIDEO mode, and select item no. “13” and
change data value to adjust “a” to be 4.00 ±0.01Vp-p.
[B-VIDEO ADJUSTMENT]
9. Connect an oscilloscope to test point “TP505B” (+)
and chassis ground (-).
10. Select COMPUTER mode, and select item no. “14”
and change data value to adjust “a” to be 4.00
±0.01Vp-p.
11. Select VIDEO mode, and select item no. “14” and
change data value to adjust “a” to be 4.00 ±0.01Vp-p.
(a)
(b)
black level
white level
white level
PC/AV-VIDEO ADJUSTMENT-1
[PC-VIDEO ADJUSTMENT-2]
1. Receive the 16-step grey scale computer signal.
2. Set to COMPUTER mode.
3. Connect an oscilloscope to test point “TP503G” (+)
and chassis ground (-).
4. Enter to the service mode, select item no. “15” and
change data value to adjust “b” to be 1.70 ±0.01Vp-p.
[AV-VIDEO ADJUSTMENT-2]
5. Receive the 16-step grey scale video signal.
6. Set to VIDEO mode.
7. Select item no. “15” and change data value to adjust “b”
to be 1.85 ±0.01Vp-p.
(a)
(b)
black level
white level
white level
PC/AV-VIDEO ADJUSTMENT-2