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[B-Pedestal adjustment]
8. Connect an oscilloscope to test point "TP201B" (+) and chassis ground (-).
9. Select item no. "16" of group no. "3" and change data value to adjust the pedestal
level and black level to be same level.
2.5 NRS Adjustment
1. Receive the 16-step gray scale computer signal.
2. Set to
COMPUTER
mode.
3. Connect an oscilloscope to test point "TP3551" (+) and chassis ground (-).
4. Enter the service mode and select item no. "7" of group no. "3" and change data value
to adjust it so that waveform "a" is 5.5 ± 0.1 V.
2.6 Signal Center Adjustment
1. Receive the 16-step gray scale computer signal.
2. Set to
COMPUTER
mode.
3. Enter the service mode.
[R-signal center adjustment]
4. Connect the digital voltmeter to test point "TP25R1" (+) and chassis ground (-).
5. Select item no. "0" of group no. "3" and change data value to adjust it so that the
voltage value is 7.30 ± 0.05 V.
[G-signal center adjustment]
6. Connect the digital voltmeter to test point "TP25G1" (+) and chassis ground (-).
7. Select item no. "1" of group no. "3" and change data value to adjust it so that the
voltage value is 7.30 ± 0.05 V.
Part 3: Adjustment
3-11
(a)
Fig. 3-3
Pedestal level = Black level
(a)
Fig. 3-2
Summary of Contents for LV-7355J
Page 9: ...Part 1 General Information ...
Page 22: ...Part 2 Repair Information ...
Page 43: ...Part 3 Adjustment ...
Page 65: ...Part 4 Troubleshooting ...
Page 82: ...Part 4 Troubleshooting 4 17 BA7078AF Selector IC6241 CXA2101AQ RGB Matrix IC4101 ...
Page 85: ...Part 4 Troubleshooting 4 20 ML60851 USB I F IC9801 M62393 D A IC2571 ...
Page 86: ...Part 4 Troubleshooting 4 21 TB1274AF Video Decoder IC1101 TA1318N AFC Detector IC6171 ...
Page 88: ...Part 5 Parts Catalog ...
Page 89: ......
Page 107: ...Part 6 Electrical Diagrams ...
Page 117: ......