19-6.
Back light Current consumption adjustment
(VF-109 board)
Purpose :
Set brightness of the back light (fluorescent
lamp) to a constant level.
Adjustment error :
The EVF screen will become too dark or too
bright.
Mode
Playback
Signal
No signal
Measurement Point
The pattern land from which R891 is
removed
Measuring Equipment
Current meter
Adjustment Page
F
Adjustment Address
D3
Specification
45 ± 2mA
Note 1 :
Perform this adjustment after 30 seconds of warm up after
the power is turned ON.
Note 2 :
Remove R891 before adjustment, and return R891 after
adjustment.
Adjustment Procedure:
19-7.
White balance adjustment
Purpose :
Calibrate the white balance.
Adjustment error :
The color reproduction of the EVF screen
becomes poor.
Mode
Playback
Signal
Any signal
Measurement Point
Check white balance on the EVF
Measuring Equipment
screen.
Adjustment Page
F
Adjustment Address
CF, D0
Specification
The EVF screen must not have any
colors.
Adjustment Procedure:
Order
Page
Address
Data
Procedure
1
Remove R891 from the VF-109 board.
Connect an ammeter to the pattern lands from which R891 is removed.
2
6
00
01
Set the data. (Preparation)
3
F
D3
Adjust the current value to the specification.
4
Press the PAUSE button.
5
6
00
00
Set the data. (End)
6
Reconnect R891.
Order
Page
Address
Data
Procedure
1
6
00
01
After setting the data, press the PAUSE button. (Preparation)
2
F
CF
7A
After setting the data, press the PAUSE button.
3
F
D0
6A
After setting the data, press the PAUSE button.
4
Confirm that the EVF screen has not color at all.
5
F
CF, D0
If the EVF screen has any colors, change the data until the EVF screen has any colors.
6
Press the PAUSE button.
7
6
00
00
After setting the data, press the PAUSE button. (End)
Note :
Connect ammeter to thee lands where R891 is removed.
Fig. 6-1-14
6-31
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