Yaskawa i80M Maintenance Manual - Manual (Page 200)

6.2 MACHINE CONTROL STATION (Cent’d)
(3) Checking Functions After Replacement
Check that +5V, +12V, and outputs are not
shorted due to overloading.
Apply the first power and second power again and
check that no alarm occurs.
Check that the brightness and contrast of the CRT
are normal.
Check that keys on the control panel can be
operated and the buzzer sounds.
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