Omron NT631 Operation Manuals page 217

System Maintenance
Backlight Brightness Adjustment (for NT631C-ST141j-EV1 only)
Reference
The NT631C–ST141j–EV1 allows the brightness of the backlight to be adjusted
in 3 steps. The "BRIGHTNESS ADJUST" screen enables you to make the adjust-
ment while actually checking the brightness on the screen.
In the NT631C–ST151j–EV1, adjustment is not possible even though this screen
is displayed.
Adjust the backlight brightness by following the menu operation from the System
Menu shown below.
Select "Contrast Adjust".
Adjust the contrast with the touch switches in
the left half of the screen.
[ ]: Increase 10 steps
[Y]: Increase 1 step
[B]: Decrease 1 step
[ ]: Decrease 10 steps
Press "Quit".
The contrast is set and the NT631/NT631C
returns to the "I/O SETTINGS MENU"
screen.
Select "Maintenance Mode".
Section 6-11
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