Casio IT-9000 Series Service Manual page 46

[4] LCD Backlight
No. Operation
Select "[4].LCD Backlight"
from MENU-2 screen.
1
[5] LCD Backlight Calibration
No. Operation
Select "[5].LCD Backlight
Calibration" from MENU-2
screen.
1
Display
Display
– 39 –
IT-9000
Test Details
The backlight brightness is
maximized.
Each time you press the
"ENT" key, the brightness level
changes from "maximum"
to "minimum", and then to
"standard".
When you press it once again,
the judgment screen appears.
If brightness has changed
correctly (OK):
Press the "1" key to return to
the menu screen.
If brightness has not changed
correctly (Failure):
Press the "0" key to return to
the menu screen.
Test Details
A number located below "5" is
displayed in blue.
Set a luminance meter onto the
LCD of IT-9000.
Then, press the numeric keys
"4" and "6" to adjust the reading
of the meter between 210 and
220.
The step width for above
adjustment can be changed by
pressing the numeric key "1" or
"5".
"1" key: For 1-step width
"5" key: For 5-step width
(default)
After the adjustment, press the
"ENT" key to save the setting
and return to the menu screen.
[ NOTE ]
The target value to be adjusted
changes according to the
luminance meter to be used.
• 3298F (Yokogawa Electric
Corporation):
Between 210 and 220
• LC-4T3 (Tsubosaka Electric
Co., Ltd.):
Between 122 and 128
(Typ.125)