5-33
2H
A
A: Between the reversed waveform peak and non-reversed
waveform peak
4. Black Limit Adjustment (SY-66 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 CN706 (VG)
External trigger: Pin
8
of CN706
(PEARL COM)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
D5
Specified Value
A = 8.20
±
0.1 Vp-p
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
4
F1
03
3
D
D0
Note down the data.
4
D
D0
20
Press PAUSE button.
Change the data and set the
5
D
D5
voltage (A) to the specified
value.
6
D
D5
Press PAUSE button.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
4
F1
00
2
D
D0
Set data noted down at step 3,
and press PAUSE button.
3
0
01
00
Fig. 5-1-21