Lucent Technologies Lineage
®
2000 400A, 60Hz Ferroresonant Rectifier J85503C-3
Issue 10 July 2000
Spare Parts and Replacement Procedures 8 - 9
CM4 Interface
Board
Minimize electrostatic discharge when handling circuit modules.
Observe all warnings in Section 4.
1. Turn the rectifier Power switch Off.
2. Turn the rectifier CB1 circuit breaker off (down).
3. At the ac service panel supplying power to the rectifier, remove
the input fuses assigned to the rectifier, or turn the circuit breaker
Off.
4. At the plant controller, remove the fuse REG fuse associated with
the rectifier.
5. At the rectifier, loosen the locking screws and open the door.
6. Disconnect control cable connector J5A from the CM4 board by
unlatching first, then pulling the connector.
7. Disconnect the connecting cables from CM4.
8. Remove CM4 from the support standoffs by using a small
flat-bladed screwdriver to push in the latches on each standoff.
9. Position the new CM4 board over the standoffs. Verify that each
latch snaps and locks in place.
10. Reconnect connecting cables to CM4.
11. If the rectifier is to be restored to service, refer to Section 7,
“Restore Rectifier to Service.”
CM5 or CM6
Snubber Board
1. Remove the quick-disconnect connectors from the board.
2. Push in on the plastic locking tabs to free the board.
3. Remove any screws holding the board in place.
4. Reinstall in reverse order.