Mitsubishi Electric MR-MQ100 User Manual page 112

6 INSPECTION AND MAINTENANCE
1)
Remove the internal I/F connector
from the Motion controller.
Does "POWER"
LED turn on?
NO
A manual pulse generator or
a synchronous encoder break down.
the cable is disconnected.
(A normal manual pulse generator or
normal synchronous encoders are
exchanged.)
Does "POWER"
LED turn on?
NO
H/W fault
Check operation in the order starting
with the minimum system.
If the module will not work, explain
the error symptom and get advice
from out sales representative for the
modules with failure.
YES
YES
6 - 15
END