Bright Adjustment (Fc-85 Board); Contrast Adjustment (Fc-85 Board) - Sony MVC-FD97 Service Manual

4. Bright Adjustment (FC-85 Board)

Set the level of the VIDEO signal for driving the LCD to the speci-
fied value.
If deviated, the LCD screen image will be blackish or saturated
(whitish).
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01 01
2 2 10 01
3 5 F1 03
4 D D0
5 D D0
Processing after Completing Adjustment:
Order Page Address Data
1 5 F1 00
2 2 10 00
3 0 01 00
GAMMA1 limiter level
A
Pedestal
A: Between the pedestal and GAMMA1
limiter level
Fig. 5-1-30
PLAY
Arbitrary
Pin 9 of CN803 (VG)
External trigger: Pin 8 of CN803
(COM)
Oscilloscope
D
D0
A = 2.15 ± 0.05 Vp-p (TYPE S)
A = 1.28 ± 0.05 Vp-p (TYPE C)
Procedure
Change the data and set the
voltage (A) to the specified value.
Press PAUSE button.
Procedure
2H

5. Contrast Adjustment (FC-85 Board)

Set the level of the VIDEO signal for driving the LCD to the speci-
fied value.
If deviated, the LCD screen image will be blackish or saturated
(whitish).
Mode
Signal
Measurement Point
Measuring Instrument
Adjustment Page
Adjustment Address
Specified Value
Adjusting method:
Order Page Address Data
1 0 01
2 5 F1
3 D D4
4 D D4
Processing after Completing Adjustment:
Order Page Address Data
1 5 F1
2 0 01
A
Pedestal
A: Between the pedestal and 10 steps peak
5-45
PLAY
Arbitrary
Pin 9 of CN803 (VG)
External trigger: Pin 8 of CN803
(COM)
Oscilloscope
D
D4
A = 3.17 ± 0.07 Vp-p (TYPE S)
A = 2.35 ± 0.07 Vp-p (TYPE C)
Procedure
01
03
Change the data and set the
voltage (A) to the specified value.
Press PAUSE button.
Procedure
00
00
10 steps peak
2H
Fig. 5-1-31