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Lucent Technologies Lineage
®
2000 ECS-12 Controller J85501D-2
Issue 3 August 1998
Troubleshooting 7 - 5
Figure 7-2.2: 113B Control Unit Has Lost Power (continued)
B. 113B CONTROL UNIT HAS LOST POWER
SHEET 2 OF 3
FROM STEP 12, SHEET 1
14. CHECK FOR BLOWN FUSES ON LVD/FUSE BOARD
15. CHECK FOR VOLTAGE ON PLANT BUS BARS
16. CHECK SEATING OF CIRCUIT PACK
IN BACKPLANE CONNECTOR P101
17. CHECK SEATING OF RIBBON CABLE
IN BACKPLANE CONNECTOR P601
18. CHECK SEATING OF RIBBON CABLE
IN BCC1 CONNECTORS P706 & P708
19. CHECK SEATING OF RIBBON CABLE
IN LVD/FUSE BOARD CONNECTOR P502
20. CHECK SEATING OF POWER CABLE ASSEMBLIES
IN LVD/FUSE BOARD CONNECTORS P504 & P506
21. UNPLUG 113B AND CHECK FOR VOLTAGE
ON P101 PER TABLE 6-A
22. ARE ALL VOLTAGES
PRESENT?
25. ARE ALL VOLTAGES
PRESENT?
27. CHECK FOR VOLTAGE
ON BACK OF BCC1, P706
PER TABLE 6-B
GO TO STEP 28, SHEET 3
26. DEFECTIVE BACKPLANE.
REPLACE.
24. UNPLUG RIBBON CABLE FROM
P601-1 ON THE BACKPLANE
AND CHECK FOR VOLTAGE ON
RIBBON CABLE CONNECTOR
J601-1 PER TABLE 6-B
23. DEFECTIVE 113B
CONTROL UNIT.
REPLACE.
YES
YES
NO
NO