User's Manual

NDA-24300 CHAPTER 5
Page 371
Issue 1
FAULT REPAIR PROCEDURES
8.2 Fuse Blown Fault
Check the backplane of the PIM. Make a visual check on the backplane for pin
contacting, melting or burn, etc.
Extract all the circuit cards from the PIM,
and insert them back into their slots
individually to see if the fuse blows.
Set the MB switch of the PWR supply UP.
Set the circuit breaker of the PWR supply
DOWN.
Extract all the circuit cards from their mounting
slots, except PWR supply.
Replace the fuse with spare.
Set the circuit breaker of the PWR supply UP
side.
Set the MB switch of the PWR supply DOWN.
Insert the circuit cards into their mounting slots
individually, with their MB switch to UP side.
Check to see if the fuse blows when the MB
switch has been set to DOWN.
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