Canon LV-5200U, Service Manual, Page: 54 / 126

2.5 Gain Adjustment [PC]
1. Receive the 16-step gray scale computer signal with
Computer [Analog RGB]
mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
TP505R " (+) and chassis ground (-).
4. Select item no. " 4 " and adjust the amplitude "a" to be minimum by changing the Data
value.
5. Connect an oscilloscope to test point "
TP503G
" (+) and chassis ground (-).
6. Select item no. " 5 " and adjust the amplitude "a" to be minimum by changing the Data
value.
7. Connect an oscilloscope to test point " TP501B " (+) and chassis ground (-).
8. Select item no. "
6
" and adjust the amplitude "a" to be minimum by changing the Data
value.
Fig. 3-4
2.6 Gain Adjustment [Video]
1. Receive the 16-step gray scale composite video signal with
Video [Video]
mode.
2. Enter the service mode.
3. Connect an oscilloscope to test point "
TP505R " (+) and chassis ground (-).
4. Select item no. " 4 " and adjust the amplitude "a" to be minimum by changing the Data
value.
5. Connect an oscilloscope to test point "
TP503G
" (+) and chassis ground (-).
6. Select item no. " 5 " and adjust the amplitude "a" to be minimum by changing the Data
value.
7. Connect an oscilloscope to test point " TP501B " (+) and chassis ground (-).
8. Select item no. "
6
" and adjust the amplitude "a" to be minimum by changing the Data
value.
Fig. 3-5
(a)
White Level
(a)
White Level
Part 3: Adjustment
3-9