Sony CD Mavica MVC-CD250, Руководство по обслуживанию

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5-40
MVC-CD250/CD400
5. D Range Adjustment (PK-65/66 Board)
Set the D Range 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 CN714 on SY-76 board
(VG)
External trigger: Pin
8
of CN714
on SY-76 board (PANEL_COM)
Measuring Instrument Oscilloscope
Adjustment Page A
Adjustment Address 85
Specified Value A = 3.50 ± 0.05 Vp-p
(MVC-CD400)
A = 3.40
±
0.05 Vp-p
(MVC-CD250)
Adjusting method:
Order Page Address Data Procedure
1 0 01 01
2 A 02 03 Press PAUSE button.
3 4 F1 03
4 A 85
Change the data and set the
voltage (A) to the specified
value.
5 A 85 Press PAUSE button.
Processing after Completing Adjustments:
Order Page Address Data Procedure
1 A 02 00 Press PAUSE button.
2 4 F1 00
3 0 01 00
A
2H
Pedestal
Pedestal
A: Pedestal level difference between 1H period and
previous 1H period.
Fig. 5-1-19
6. Contrast Adjustment (PK-65/66 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 PLAY
Signal Arbitrary
Measurement Point Pin
9
of CN714 on SY-76 board
(VG)
External trigger: Pin
8
of CN714
on SY-76 board (PANEL_COM)
Measuring Instrument Oscilloscope
Adjustment Page A
Adjustment Address 8A
Specified Value A = 2.86 ± 0.07 Vp-p
(MVC-CD400)
A = 2.77
±
0.07 Vp-p
(MVC-CD250)
Adjusting method:
Order Page Address Data Procedure
1 0 01 01
2 A 02 03 Press PAUSE button.
3 4 F1 03
4 A 8A
Change the data and set the
voltage (A) to the specified
value.
5 A 8A Press PAUSE button.
Processing after Completing Adjustments:
Order Page Address Data Procedure
1 A 02 00 Press PAUSE button.
2 4 F1 00
3 0 01 00
Fig. 5-1-20
A
2H
10 steps peak
Pedestal
A: Between the pedestal and 10 steps peak