2.8 Video Center Adjustment
1. Receive the 16-step grey scale computer signal with
Computer2 [RGB]
mode.
2. Enter the service mode
3. Connect a digital voltmeter to test point “
TPG1
” (+) and chassis ground (–).
4. Select group no. “
10
”, item no. “
0
” and change data value to adjust the voltage to be
7.50
± 0.05V.
5. Connect a digital voltmeter to test point “
TPR1
” (+) and chassis ground (–).
6. Select item no. “
1
” and change data value to adjust the voltage to be
7.50
± 0.05V.
7. Connect a digital voltmeter to test point “
TPB1
” (+) and chassis ground (–).
8. Select item no. “
2
” and change data value to adjust the voltage to be
7.50
± 0.05V.
2.9 PSIG Adjustment
1. Receive the 16-step gray scale computer signal with
Computer2 [RGB]
mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TPPSIG
” (+) and chassis ground (–).
4. Select group no. “
10
”, item no. “
14
” and adjust the amplitude “a” to be
10.0
± 0.1V
by changing the Data value.
5. Select item no. “
17
” and adjust the amplitude “b” to be
3.8
± 0.1V by changing the
Data value.
6. Connect an oscilloscope to test point “
TPZPSIG
” (+) and chassis ground (–).
7. Select group no. “
10
”, item no. “
12
” and adjust the amplitude “a” to be
10.0
± 0.1V
by changing the Data value.
8. Select item no. “
15
” and adjust the amplitude “b” to be
3.8
± 0.1V by changing the
Data value.
Fig. 3-8
(a)
(b)
Part 3: Adjustment
3-15
Summary of Contents for LV-7215U
Page 9: ...Part 1 General Information ...
Page 25: ...Part 2 Repair Information ...
Page 43: ...Part 3 Adjustment ...
Page 66: ...Part 4 Troubleshooting ...
Page 78: ...Part 4 Troubleshooting 4 12 AN5870 RGB SYNC SW IC1201 IC5201 BA7078 Sync Separator IC5341 ...
Page 80: ...Part 4 Troubleshooting 4 14 CXD3536 LCD Driver IC401 FA5502 P F Control IC621 ...
Page 81: ...Part 4 Troubleshooting 4 15 M62392 M62393 D A IC6271 IC281 ML60851 USB Driver IC9801 ...
Page 83: ...Part 4 Troubleshooting 4 17 TC90A69F Y C Separator IC2101 ...
Page 84: ...Part 5 Parts Catalog ...
Page 85: ......
Page 99: ...Part 6 Electrical Diagrams ...