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System Maintenance Section 6-11
Checking the Backlight Check if the backlight functions normally by following the menu operation from
the System Menu shown below.
• If the backlight is normal, it flashes. At this time, the Backlight Check
touch switch is displayed in reverse video.
• To end the backlight check, press the Backlight Check touch switch again.
Screen Data Memory
Check
Check if the screen data memory is functioning normally.
Reference: • In the screen data memory check, a write test is performed on the screen
data memory. Since all the screen data in the NT31/NT31C is lost in this
check, confirm that this data is backed up at the Support Tool or Memory
Unit before executing it.
• If writing to the screen data memory is disabled by the setting for System
Settings in the System Installer mode, it is not possible to execute a
screen data check.
Select Maintenance Mode.
Select I/O Check.
Select Device Check.
Select Backlight Check.
Ver 4.12
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