Lucent DDM-2000 OC-3 User And Service Manual page 712

363-206-285
Issue 2, February 2000
29. Is FAN ALARM LED lighted on fan assembly?
If YES, then continue with Step 30.
If NO, then proceed to Step 37.
!
30.
WARNING:
To avoid possible damage, do not overextend fan assembly power cable.
Remove fan assembly from bay.
31. Examine fan assembly for anything that will prevent fan from operating
properly.
32. Remove any blockages and reinstall fan assembly and fuses.
33. Is fan assembly FAN ALARM LED off?
If YES, then STOP. YOU HAVE COMPLETED THIS PROCEDURE.\f1
If NO, then continue with Step 34.
34. Remove FAN H and FAN L fuses on corresponding BFU.
35. Replace fan assembly with new fan assembly and install fuses.
36. Is fan assembly FAN ALARM LED off?
If YES, then STOP. YOU HAVE COMPLETED THIS PROCEDURE.
If NO, then continue with Step 37.
37. Replace one of the 336 RECTIFIERs.
38. Does alarm clear?
If YES, then STOP. YOU HAVE COMPLETED THIS PROCEDURE.
If NO, then continue with Step 39.
39. Reinstall original 336A RECTIFIER.
40. Replace second 336A RECTIFIER.
DDM-2000 OC-3 M
Trouble Clearing:
ULTIPLEXER
TAP-114
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