Pc Gain Adjustment; Component Gain Adjustment; Av Gain Adjustment - Sanyo PLC-SW15 Service Manual

Electrical Adjustments

PC GAIN ADJUSTMENT

1. Receive the 16-step grey scale computer signal.
2. Set to COMPUTER mode.
[PC-R GAIN ADJUSTMENT]
3. Connect an oscilloscope to test point "TP2212R" (+)
and chassis ground (-).
4. Enter the service mode, select item no. "30" and
change data value to adjust "a" to be 1.13 ±0.01Vp-p.
[PC-G GAIN ADJUSTMENT]
5. Connect an oscilloscope to test point "TP2222G" (+)
and chassis ground (-).
6. Select item no. "273" and change data value to adjust
"a" to be 1.13 ±0.01Vp-p.
[PC-B GAIN ADJUSTMENT]
7. Connect an oscilloscope to test point "TP2232B " (+)
and chassis ground (-).
8. Select item no. "274" and change data value to adjust
"a" to be 1.13 ±0.01Vp-p.
Pedestal level = Black level

COMPONENT GAIN ADJUSTMENT

1. Receive the 16-step grey scale component video sig-
nal.
2. Set to VIDEO (Component) mode.
[COMPONENT-R GAIN ADJUSTMENT]
3. Connect an oscilloscope to test point "TP2212R" (+)
and chassis ground (-).
4. Enter the service mode, select item no. "30" and
change data value to adjust "a" to be 1.05 ±0.01Vp-p.
[COMPONENT-G GAIN ADJUSTMENT]
5. Connect an oscilloscope to test point "TP2222G" (+)
and chassis ground (-).
6. Select item no. "273" and change data value to adjust
"a" to be 1.05 ±0.01Vp-p.
[COMPONENT-B GAIN ADJUSTMENT]
7. Connect an oscilloscope to test point "TP2232B " (+)
and chassis ground (-).
8. Select item no. "274" and change data value to adjust
"a" to be 1.05 ±0.01Vp-p.
(a)

AV GAIN ADJUSTMENT

1. Receive the 16-step grey scale video signal.
2. Set to VIDEO mode.
3. Connect an oscilloscope to test point "TP2222G" (+)
and chassis ground (-).
4. Enter the service mode, select item no. "30" and
change data value to adjust "a" to be 1.05 ±0.01Vp-p.
-6-
Pedestal level = Black level
Pedestal level = Black level
(a)
(a)