Contrast Adjustment (Pk-61 Board); Vg Center Adjustment (Pk-61 Board) - Sony MVC-FD100 Service Manual

MVC-FD100/FD100H/FD200/FD200H

5. Contrast Adjustment (PK-61 Board)

Set the level of the VIDEO signal for driving the LCD to the
specified 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 Adjustments:
Order Page Address Data
1 5 F1
2 0 01
10 steps peak
A
Pedestal
A: Between the pedestal and 10 setps peak
PLAY
Arbitrary
Pin 9 of CN803 on FC-89 board
(VG)
External trigger: Pin 8 of CN803
on FC-89 board (COM)
Oscilloscope
D
D4
A = 2.45 ± 0.05 Vp-p
Procedure
01
03
Change the data and set the
voltage (A) to the specified
value.
Press PAUSE button.
Procedure
00
00
2H
Fig. 5-1-25

6. VG Center Adjustment (PK-61 Board)

Set the center of VG signal for driving the LCD to the specified
value.
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 D6
4 D D6
Processing after Completing Adjustments:
Order Page Address Data
1 5 F1
2 0 01
5-38
PLAY
Arbitrary
Pin 9 of CN803 on FC-89 board
(VG)
Digital voltmeter
D
D6
A = 7.00 ± 0.05 V
Procedure
01
02
Change the data and set the
DC voltage (A) to the
specified value.
Press PAUSE button.
Procedure
00
00