User's Manual

NDA-24300 CHAPTER 5
Page 373
Issue 1
FAULT REPAIR PROCEDURES
8.4 Fault of Alarm Lamps on PWR Supply
Note:
Insert each PWR supply with its MB switch to UP side, and then set it back to DOWN side.
Press RESET button of the PWR supply.
Alarm lamp goes out. FAULT SUPERVISION
Alarm lamp illuminates again. Set the MB switch on the PWR supply UP.
Turn circuit breaker OFF.
Set MB switch on all the circuit cards, except
PWR supply.
Extract all circuit cards from their mounting
slots.
Turn circuit breaker ON.
Set the MB switch to DOWN side.
Check to see if the alarm lamp illuminates.
If the alarm lamp illuminates,
replace the PWR supply with a
spare.
If the alarm lamp does not
illuminate, insert the circuit cards
into their mounting slot
individually to see if the alarm
lamp illuminates.
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