Check the operation of the touch panel. Check that the touched area lights up correctly.
For details about the setting screen, refer to the setting guide. M.16.6.3 Maintenance Menu - Check Touch Panel
Go to offline mode and touch [Maintenance Menu] on the item changeover switch.
[Maintenance Menu] screen opens. Select [Check Touch Panel].
[Check Touch Panel] screen opens. Touch anywhere on the screen and check that the dots in the touched area light up properly.
To finish the check, touch [END].