Backlight Consumption Current Adjustment (Vf-131 Board); White Balance Adjustment (Vf-131 Board) - Sony MVC-FD91 Service Manual

5. Backlight Consumption Current Adjustment
(VF-131 board)
Set the backlight luminance and color temperature.
If deviated, the image may become dark or bright.
Mode Playback
Signal Alignment disk (TFD2-1(+) or TFD2-
2(–)):
Stair step signal of 10 steps (MVC-
006T.JPG)
+ Probe: Pin !ª of CN701 (EVF
Measurement Point
BL+) on PK-45 board
– Probe: Pin @º of CN701 (EVF BL
4.75V) on PK-45 board
Measuring Instrument Digital voltmeter
Adjustment Page F
Adjustment Address 70
Specified Value A = 20 ± 1mVdc
Note: Adjust 30 seconds after running on the power supply.
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: F, address: 70, change the data and set the voltage
difference (A) between Pin !ª of CN701 (EVF BL+) and Pin
@º of CN701 (EVF BL 4.75V) to the specified value.
3) Press the PAUSE button of the adjustment remote commander.
4) Select page: 0, address: 01, and set data: 00.

6. White Balance Adjustment (VF-131 board)

Correct the white balance.
If deviated, the EVF screen color cannot be reproduced.
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
1) Select page: 0, address: 01, and set data: 01.
2) Select page: 3, address: 02, and set data: 01.
3) Select page: 3, address: 18, and set data: 01.
4) Select page: 3, address: 19, and set data: 00.
5) Select page: F, address: 6B and 6C, set the data to the initial
value.
Note: Press the PAUSE button of the adjustment remote commander
each time to set the data.
Address 6B
Data
80
6) Check that the EVF screen is not colored. If colored, change
the data of page: F, address: 6B and 6C so that the EVF screen
is not colored.
Note: To write in the non-volatile memory (EEPROM), press the
PAUSE button of the adjustment remote commander each time
to set the data.
7) Select page: 3, address: 02, and set data: 00.
8) Select page: 3, address: 18, and set data: 00.
9) Select page: 0, address: 01, and set data: 00.
5-23
Playback
No signal
Check on EVF screen
F
6B, 6C
The EVF screen should not be
colored.
6C
80