Black Limit Adjustment (Pk-61 Board); Bright Adjustment (Pk-61 Board) - Sony MVC-FD100 Service Manual

3. Black Limit Adjustment (PK-61 Board)

Set the maximum amplitude of the RGB decoder for driving the
LCD to the specified value.
If deviated, the LCD screen image will be blackish or saturated
(whitish).
Mode PLAY
Signal Arbitrary
Measurement Point Pin 9 of CN803 on FC-89 board
(VG)
External trigger: Pin 8 of CN803
on FC-89 board (COM)
Measuring Instrument Oscilloscope
Adjustment Page D
Adjustment Address D5
A = 8.20 ± 0.1 Vp-p
Specified Value
Adjusting method:
Order Page Address Data
1 0 01 01
2 5 F1 03
3 D D0 20
4 D D5
5 D D5
Processing after Completing Adjustments:
Order Page Address Data
1 5 F1 00
2 0 01 00
A
A: Between the reversed waveform peak and non-reversed
waveform peak
Fig. 5-1-23
Procedure
Set the data.
(Don't press PAUSE button.)
Change the data and set the
voltage (A) to the specified
value.
Press PAUSE button.
Procedure
2H
MVC-FD100/FD100H/FD200/FD200H

4. Bright Adjustment (PK-61 Board)

Set the amplitude of the RGB decoder 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 D0
4 D D0
Processing after Completing Adjustments:
Order Page Address Data
1 5 F1
2 0 01
A
Pedestal
A: Between the reversed waveform pedestal and non-reversed
waveform pedestal
5-37
PLAY
Arbitrary
Pin 9 of CN803 on FC-89 board
(VG)
External trigger: Pin 8 of CN803
on FC-89 board (COM)
Oscilloscope
D
D0
A = 7.80 ± 0.1 Vp-p
Procedure
01
03
Change the data and set the
voltage (A) to the specified
value.
Press PAUSE button.
Procedure
00
00
Pedestal
2H
Fig. 5-1-24