– 12 –
9. V-COM Adjustment
Set DC bias of common electrode drive signals for the LCD panel
to proper value.
If deviated, the LCD screen will be unstable where flickering or
vertical streaks appear.
Item number
3-01-08
Screen display
Test mode screen
Measurement point
Check on LCD screen
Measuring instrument
Adjustment data
9C
initial value
Adjustment value
Fig. 7-1-17
Note:
This adjustment must be performed after performing
“Brightness Adjustment” and “Contrast Adjustment”.
Adjusting method
1) Select the item number “3-01-08”.
2) Set the adjustment data to initial value (9C).
3) Check that the density of character “e” on the LCD screen is
same (see Fig. 7-1-17). If different, change the adjustment data
by using
e
and
E
keys so as to attain the same density of
character “e”.
4) Press
y
key to write the adjustment data.
Fig.7-1-17
TEST MODE
LCD Panel
9C
made by MD dep.
I TRON
Ver.
s
.
sss
Drive
Ver.
s
.
sss
JAVA APP
Ver.
ssssssss
JAVA OS
Ver.
ssssssss
BOOT
Ver.
s
.
sss
I PL
Ver.
s
.
sss
RATE CTL
Ver.
s
.
sss
Item No.
V–COM adjst
3–01–08
A d u s t
NG
OK
enlargement
NG
8. Color Adjustment
Set the color density to the specified value.
If deviated, the color will be too dark or too light.
Item number
3-01-07
Screen display
Color bar
Measurement point
Adjusting monitor jig
G
pin (VG)
Measuring instrument
Oscilloscope
Adjustment data
76
initial value
Adjustment value
A = 0.15
±
0.05 Vp-p
Adjusting method
1) Select the item number “3-01-07”.
2) Press the MENU key to display color bar on the LCD screen.
3) Using
e
and
E
keys, change the adjustment data so that a
difference (A) between white signal level and green signal level
satisfies the adjustment value.
4) Press
y
key to write the adjustment data.
5) Press the MENU key to return the LCD screen to the test mode
screen.
Fig.7-1-16
Green
White
A
2H
Summary of Contents for MDDISCAM DCM-M1
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