2.10 AV Gain Adjustment
1. Receive the 16-step gray scale video signal.
2. Set to
VIDEO
mode.
3. Enter the service mode.
[R gain adjustment]
4. Connect an oscilloscope to test point "TP25R1" (+) and chassis ground (-).
5. Select item no. "3" of group no. "2" and change data value to adjust it so that
waveform "a" has the minimum amplitude.
[G gain adjustment]
6. Connect an oscilloscope to test point "TP25G1" (+) and chassis ground (-).
7. Select item no. "4" of group no. "2" and change data value to adjust it so that
waveform "a" has the minimum amplitude.
[B gain adjustment]
8. Connect an oscilloscope to test point "TP25B1" (+) and chassis ground (-).
9. Select item no. "5" of group no. "2" and change data value to adjust it so that
waveform "a" has the minimum amplitude.
2.11 Common Center Adjustment
1. Receive the 1 dot line computer signal.
2. Set to
COMPUTER
mode.
3. Enter the service mode.
[G-common center adjustment]
4. Project the green light component on the screen.
5. Select item no. "8" of group no. "3" and change data value to adjust it so that the
slicker on the screen is minimized.
[B-common center adjustment]
6. Project the blue light component on the screen.
7. Select item no. "9" of group no. "3" and change data value to adjust it so that the
slicker on the screen is minimized.
[R-common center adjustment]
8. Project the red light component on the screen.
9. Select item no. "10" of group no. "3" and change data value to adjust it so that the
slicker on the screen is minimized.
Part 3: Adjustment
3-14
White Level
(a)
Fig. 3-7
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: ......