5-28
6. Contrast Adjustment (PK-58 board)
Set the level of the VIDEO signal for driving the LCD to the specified
value. If deviated, the screen image will be blackish or saturated
(whitish).
Mode
Still (Auto (
))
Subject
Arbitrary
Measurement Point
Pin
9
of CN302 (VG)
External trigger: Pin
8
of CN302
(COM)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
D4, CF, DF
Specified Value
A = 3.17 ± 0.07V
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
4
F1
03
Set the data.
3
D
D4
Change the data and set the
voltage (A) between the pedestal
and 10 steps peak to the specified
value.
4
D
D4
Press PAUSE button.
5
D
D4
Read the data, and this data is
named D
D4
.
6
D
CF
D
D4
Set the data, and press PAUSE
button.
7
D
DF
D
D4
Set the data, and press PAUSE
button.
8
4
F1
00
Set the data.
9
0
01
00
Set the data.
7. Color Adjustment (PK-58 board)
Set the color saturation to the standard value. If deviated, the color
will be too dark or light.
Mode
Still (Auto (
))
Subject
Arbitrary
Measurement Point
Pin
9
of CN302 (VG)
External trigger: Pin
8
of CN302
(COM)
Measuring Instrument
Oscilloscope
Adjustment Page
D
Adjustment Address
D1
Specified Value
A = 540 ± 50mV
Adjusting method:
Order Page Address Data
Procedure
1
0
01
01
Set the data.
2
4
F1
04
Set the data.
3
D
D1
Change the data and set the
voltage (A) between the white
100% (Reference level) and green
to the specified value.
4
D
D1
Press PAUSE button.
5
4
F1
00
Set the data.
6
0
01
00
Set the data.
Fig. 5-1-19.
Fig. 5-1-20.
A
2H
10 steps peak
Pedestal
A
2H
White 100 %
Green