User's Manual

CHAPTER 5 NDA-24300
Page 372
Issue 1
FAULT REPAIR PROCEDURES
8.3 Circuit Breaker OFF Fault in PWR Supply
Check the backplane of the PIM. Make a visual check on the backplane for pin
contacting, melting or burning, etc.
Extract all the circuit cards from the PIM,
and make a visual check of the circuit
cards.
Set MB switch of the PWR supply UP.
Set the circuit breaker of the PWR supply
DOWN.
Extract all circuit cards out of their mounting
slots.
Make a visual check of the extracted circuit
cards. Check ICs, resistors, and capacitors to
see if any are burned.
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