Procedure 5-2: Clear
″
-48V power/fuse FA or FB failed
″
alarm
....................................................................................................................................................................................................................................
Overview
This procedure is used to clear a
-48V power/fuse failed
alarm
indicated by a lighted Critical or Major (
CR/MJ
), or Minor (
MN/ABN
)
LED on the SYSCTL faceplate and reported as critical, major, or
minor in the WaveStar
®
CIT Alarm List. The alarm list identifies
which power source is affected, either A or B.
Required equipment
In addition to the equipment listed in
, a
power meter is also required.
Before you begin
Prior to performing this procedure:
1.
Refer to
in this chapter.
2.
Refer to
“Electrostatic discharge” (1-13)
in
Procedure
Complete the following steps to identify and clear a
-48V
power/fuse failed
alarm.
............................................................................................................................................................
1
Are both of the power indicators lighted on the top of the
Metropolis
®
DMXplore shelf?
If...
Then...
Yes
Proceed to
No
Continue with
............................................................................................................................................................
2
Perform a thorough visual inspection of the access panel. Look for
signs of damage or a loose power connection.
Important! Each -48V power feeder supplies redundant power to
the shelf circuit packs. It is highly unlikely that a circuit pack
failure would cause a fuse to blow. The more probable cause of a
failure in a feeder/circuit breaker is a short in the feeder path or a
problem with a circuit pack connector.
Trouble clearing procedures
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365-372-333 R2.1
Issue 4, June 2005
Lucent Technologies
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