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2.8 Video Center Adjustment
1. Receive the 16-step grey scale computer signal with
Computer1 [RGB]
mode.
2. Enter the service mode
3. Connect a digital voltmeter to test point “
TPGV1
” (+) and chassis ground (–).
4. Select item no. “
1
” and change data value to adjust the voltage to be
7.0
±0.05V.
5. Connect a digital voltmeter to test point “
TPRV1
” (+) and chassis ground (–).
6. Select item no. “
2
” and change data value to adjust the voltage to be
7.0
±0.05V.
7. Connect a digital voltmeter to test point “
TPBV1
” (+) and chassis ground (–).
8. Select item no. “
3
” and change data value to adjust the voltage to be
7.0
±0.05V.
9. Connect a digital voltmeter to test point “
TPGV2
” (+) and chassis ground (–).
10. Select item no. “
21
” and change data value to adjust the voltage to be
8.0
±0.05V.
11. Connect a digital voltmeter to test point “
TPRV2
” (+) and chassis ground (–).
12. Select item no. “
22
” and change data value to adjust the voltage to be
8.0
±0.05V.
13. Connect a digital voltmeter to test point “
TPBV2
” (+) and chassis ground (–).
14. Select item no. “
23
” and change data value to adjust the voltage to be
8.0
±0.05V.
2.9 Black Reference Adjustment
1. Receive the 16-step grey scale computer signal with
Computer1 [RGB]
mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point “
TPVIDEOG
” (+) and chassis ground (–).
4. Select item no. “
10
” and change data value to adjust amplitude “a” to be
9.8
± 0.1V.
5. Connect an oscilloscope to test point “
TPVIDEOR
” (+) and chassis ground (–).
6. Select item no. “
11
” and change data value to adjust amplitude “a” to be
9.8
± 0.1V.
7. Connect an oscilloscope to test point “
TPVIDEOB
” (+) and chassis ground (–).
8. Select item no. “
12
” and change data value to adjust amplitude “a” to be
9.8
± 0.1V.
Fig. 3-9
(a)
black level
black level
Part 3: Adjustment
3-12
Содержание LV-X4U
Страница 2: ...CANON Multimedia Projector LV X4U D78 5532 LV X4E D78 5533 SERVICE SMANUAL ...
Страница 9: ...Part 1 General Information ...
Страница 26: ...Part 2 Repair Information ...
Страница 43: ...Part 3 Adjustment ...
Страница 62: ...Part 4 Troubleshooting ...
Страница 79: ...Part 4 Troubleshooting 4 17 AN5870SB RGB SYNC SW IC5201 LM4889 Audio Amplifier IC5031 ...
Страница 81: ...Part 4 Troubleshooting 4 19 FA5502 P F Control IC621 VPC3230D Video Decoder IC101 ...
Страница 82: ...Part 4 Troubleshooting 4 20 L3E07070 Signal Processor for TFT LCD IC401 NJW1141 Audio Selector IC5001 ...
Страница 83: ...Part 4 Troubleshooting 4 21 STR Z2156A Power Switching Control IC631 PW168A Scaler Main CPU IC301 ...
Страница 84: ...Part 4 Troubleshooting 4 22 TA1370FG Sync Separator Frequency Counter IC5302 ...
Страница 85: ...Part 5 Parts Catalog ...
Страница 86: ......
Страница 94: ......
Страница 96: ...V 1 U 2 U 1 V 2 Z 1 Z 2 X Y W Accessories Page 5 CANON LV X4J LV X4U LV X4E REF NO D78 5531 D78 5532 D78 5533 ...
Страница 100: ...Part 6 Electrical Diagrams ...