Sanyo PLC-EF12B, Service Manual

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[R-VIDEO ADJUSTMENT-1]
7. Connect an oscilloscope to test point “TP2511” (+)
and chassis ground (-).
8. Select data no. “014” and set data value to “3FF”.
9. Select data no. “013” and change data value to adjust
“a” to be 4.0 ±0.05Vp-p.
10. Select data no. “014” and change data value to
adjust “b” to be 2.1 ±0.05Vp-p.
[B-VIDEO ADJUSTMENT-1]
11. Connect an oscilloscope to test point “TP2513” (+)
and chassis ground (-).
12. Select data no. “016” and set data value to “3FF”.
13. Select Data no. “015” and change data value to
adjust “a” to be 4.0 ±0.05Vp-p.
14. Select Data no. “016” and change data value to
adjust “b” to be 2.1 ±0.05Vp-p.
(a)
(b)
black level
white level
white level
Electrical Adjustments
Presetting
1. Receive the 16-step grey scale video signal.
2. Set to VIDEO mode.
[R-GAIN ADJUSTMENT-2]
3. Connect an oscilloscope to test point “TP501” (+) and
chassis ground (-).
4. Enter to the service mode, select data no. “00C” and
change data value to adjust “a” to be minimum ampli-
tude.
[G-GAIN ADJUSTMENT-2]
5. Connect an oscilloscope to test point “TP531” (+) and
chassis ground (-).
6. Select data no. “00E” and change data value to adjust
“a” to be minimum amplitude.
[B-GAIN ADJUSTMENT-2]
7. Connect an oscilloscope to test point “TP561” (+) and
chassis ground (-).
8. Select data no. “010” and change data value to adjust
“a” to be minimum amplitude.
Pedestal level = Black level
(a)
GAIN ADJUSTMENT-[AV]
Presetting
1. Receive the 16-step gray scale computer signal.
2. Set to COMPUTER mode.
[G-VIDEO ADJUSTMENT-1]
3. Connect an oscilloscope to test point “TP2512” (+)
and chassis ground (-).
4. Enter to the service mode, select data no. “012” and
set data value to “3FF”.
5. Select data no. “011” and change data value to adjust
“a” to be 4.0 ±0.05Vp-p.
6. Select data no. “012” and change data value to adjust
“b” to be 2.1 ±0.05Vp-p.
VIDEO ADJUSTMENT-[CG]
Presetting
1. Receive the 16-step gray scale video signal.
2. Set to VIDEO mode.
[G-VIDEO ADJUSTMENT-2]
3. Connect an oscilloscope to test point “TP2512” (+)
and chassis ground (-).
4. Enter to the service mode, select data no. “018” and
set data value to “3FF”.
5. Select data no. “017” and change data value to adjust
“a” to be 4.0 ±0.05Vp-p.
6. Select data no. “018” and change data value to adjust
“b” to be 2.1 ±0.05Vp-p.
[R-VIDEO ADJUSTMENT-2]
7. Connect an oscilloscope to test point “TP2511” (+)
and chassis ground (-).
8. Select data no. “01A” and set data value to “3FF”.
9. Select data no. “019” and change data value to adjust
“a” to be 4.0 ±0.05Vp-p.
10. Select data no. “01A” and change data value to
adjust “b” to be 2.1 ±0.05Vp-p.
VIDEO ADJUSTMENT-[AV]