5-34
5. Bright Adjustment (SY-66 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
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
D0
Specified Value
A = 7.96
±
0.1 Vp-p
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
2
4
10
01
3
4
F1
03
Change the data and set the
4
D
D0
voltage (A) to the specified
value.
5
D
D0
Press PAUSE button.
6
D
D0
Read the data and this data is
named Dref.
7
Convert Dref to decimal
notation, and obtain Dref’.
(Note)
8
Calculate D
CE
’ and D
DE
’ using
following equations.
(decimal calculation)
D
CE
’ = Dref’ – 48
D
DE
’ = Dref’ + 48
9
Convert D
CE
’ and D
DE
’ to
hexadecimal numbers, and
obtain D
CE
and D
DE
. (Note)
10
D
CE
D
CE
Press PAUSE button.
11
D
DE
D
DE
Press PAUSE button.
Note:
Refer to table 5-2-2. “Hexadecimal-decimal conversion
table”.
Processing after Completing Adjustments:
Order Page Address Data
Procedure
1
4
F1
00
2
4
10
00
3
0
01
00
2H
Pedestal
Pedestal
A
A: Between the reversed waveform pedestal and non-reversed
waveform pedestal
Fig. 5-1-22
