User's Manual

NDA-24300 CHAPTER 5
Page 337
Issue 1
FAULT REPAIR PROCEDURES
Check the line/trunk circuit cards mounted
in the unit to see if they are faulty.
Set the MB switch of the line/trunk circuit card
UP and extract it from its mounting slot.
Make a station-to-station call and see if a fault
occurs.
Perform this check on an individual basis.
If the fault has stopped occurring,
the circuit card extracted at that
time is faulty. Replace the circuit
card with a spare.
If the fault continues, check the
next circuit card.
ATTENTION
Contents
Static Sensitive
Handling
Precautions Required
A
END