Omron NT631 Operation Manuals page 628

Maintenance of the NT631/NT631C
7 Engage backlight connectors at the top and the bottom respectively in place.
The backlight cable has a polarity; refer to the figure below.
White Red
Red
White
8 Fit two touch panel cables at the top. Be sure to lock the connectors as in step
4 after fitting.
9 Close the rear case, and tighten four screws. Make sure that the internal cable
is not trapped.
10 Reconnect the wiring, cables, and units disconnected in 2, and tighten the
screws at a torque of 0.4 N
Turn the power on, and check that the RUN LED is not flashing and that no
buzzer is sounding.
- If the RUN LED flashes at 1-sec intervals and a buzzer sounds intermittent-
ly, the touch panel cable is disconnected. Follow the above steps from 1,
and check the lock status of the connector.
11 Before starting normal operation, confirm that the following tests can be exe-
cuted correctly by using the I/O check in the Maintenance menu. Also perform
a communication test with the host.
- Touch switch
- Backlight
12 On confirming that all the tests in 11 can be executed normally, start operation.
Section 11-3
623