Omron Programmable Terminals NT631 Setup Manual page 221

System Maintenance
Checking the LCD (Screen
Display)
Checking the Backlight
(for NT631C only)
204
Check if the LCD display (or EL display for NT631) functions normally by fol-
lowing the menu operation from the System Menu shown below.
Ver 4.12
• The check screen displays all the dots on the screen: either press any-
where on the touch panel or wait for three seconds and all the dots will be
cleared.
With the NT631C, the display and clearance of all the dots on the
screen is repeated for each color in turn (red green blue magenta cyan
yellow white black).
On completion of the display and clearance of all dots, the NT631/
NT631C returns to the DEVICE CHECK MENU screen.
• Touch the touch panel to discontinue the LCD check. Even if 3 seconds
have not passed, the check will proceed to the next color.
Check if the backlight functions normally with the NT631C by following the
menu operation from the System Menu shown below. This function is not
available with the NT631.
Select Maintenance Mode.
Select I/O Check.
Select Device Check.
Select LCD Check.
Section 6-11