363-206-305 Detailed Level Procedure:
DLP-511
Issue 3, June 2000 Page 1 of 2
DDM-2000 F
IBER
R
EACH
W
IDEBAND
S
HELF
Remove –48 V DC User Panel Fuse
1. Obtain multimeter capable of measuring DC voltage in the 40 to 60 volt range.
2.
!
WARNING:
–48 V DC is present in the fuse holders and the
–48V A
,
–RTN A
,
–48V B
, and
–RTN B
power connectors on the backplane shelf. It may
also be present on the
–48V BB
,
–RTN BB
connector.
!
CAUTION:
If system is in service, service interruption will occur if both fuses are
removed or both power feeders are disconnected. Do not remove any
User Panel fuse that does not indicate blown without first verifying that
–48 V is present on the other incoming power feeder.
Does fuse indicator indicate blown fuse?
If YES, continue with Step 3.
If NO, proceed to Step 7.
3. Replace –48 V blown fuse.
4. Did fuse blow again?
If YES, continue with Step 5.
If NO, proceed to Step 7.
5. Trouble in User Panel or backplane connector: If you need assistance, notify
your supervisor, your local technical support organization, or call Lucent
Technologies RTAC, per local operating instructions. If User Panel needs to be
replaced, see DLP-502.
6. STOP. YOU HAVE COMPLETED THIS PROCEDURE.
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