Lucent DDM-2000 OC-3 User And Service Manual page 707

363-206-285
Issue 2, February 2000
26. Has the SYSCTL been replaced?
If YES, then proceed to Step 31.
If NO, then continue with Step 27.
27. Use the CIT and reset command to reset SYSCTL.
28. Is the MN alarm LED still lighted after about 1 minute?
If YES, then continue with Step 29.
If NO, then STOP. YOU HAVE COMPLETED THIS PROCEDURE.
29.
NOTE:
Replacing the SYSCTL involves updating the internal memory on the
circuit pack.
Replace the SYSCTL (DLP-501).
30. Is MN alarm LED still lighted?
If YES, then continue with Step 31.
If NO, then STOP. YOU HAVE COMPLETED THIS PROCEDURE.
31.
NOTE:
The problem appears to be in the backplane wiring of the DDM-2000.
One way to verify this is to swap the SYSCTL and any circuit pack with an
inconsistent diagnostic indication with the corresponding circuit packs in
another DDM-2000. If the problem moves with the circuit packs, it means
that one or more of the circuit packs is defective. If the problem stays with
the original DDM-2000 the entire assembly, but not the circuit packs,
should be replaced. The DDM-2000 has a printed backplane and cannot
be repaired in the field.
Check for broken or bent pins, shorted pins, etc. If you need technical
assistance, notify your supervisor, your local technical support organization, or
call Lucent Technologies RTAC, per local operating instructions.
32. STOP. YOU HAVE COMPLETED THIS PROCEDURE.
DDM-2000 OC-3 M
Trouble Clearing:
ULTIPLEXER
TAP-113
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