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Lucent Technologies Lineage
®
2000 ECS-12 Controller J85501D-2
7 - 6 Troubleshooting
Issue 3 August 1998
Figure 7-2.3: 113B Control Unit Has Lost Power (continued)
B. 113B CONTROL UNIT HAS LOST POWER SHEET 3 OF 3
FROM STEP 27, SHEET 2
28. ARE ALL VOLTAGES
PRESENT?
31. ARE ALL VOLTAGES
PRESENT?
34. ARE ALL VOLTAGES
PRESENT?
37. ARE ALL VOLTAGES
PRESENT?
36. UNPLUG CABLE ASSEMBLIES FROM P504 & P506
ON LVD/FUSE BOARD AND CHECK FOR VOLTAGE
ON CONNECTORS J504 & J506 PER TABLE 6-D
39. CHECK FOR BROKEN WIRES OR LOOSE CONNECTIONS
FROM J504 & J506 TO BUS BARS AND REPAIR
OR REPLACE AS NEEDED.
40. RECONNECT ALL CABLES. CLOSE FRONT PANELS
OF CONTROLLER AND DC DISTRIBUTION.
33. CHECK FOR VOLTAGE ON BACK OF
LVD/FUSE BOARD P502 PER TABLE 6-C
32. DEFECTIVE BCC1.
REPLACE.
29. DEFECTIVE RIBBON
CABLE. REPLACE.
35. DEFECTIVE RIBBON
CABLE. REPLACE.
38. DEFECTIVE LVD/FUSE
BOARD. REPLACE.
YES
NO
NO
NO
NO
YES
YES
YES
30. UNPLUG RIBBON CABLE FROM P708 ON BCC1
AND CHECK FOR VOLTAGE ON RIBBON CABLE
CONNECTOR J708 PER TABLE 6-C