Lucent Technologies Lineage
®
2000 400A, 60Hz Ferroresonant Rectifier J85503C-3
Issue 10 July 2000
Spare Parts and Replacement Procedures 8 - 7
CM2 Control
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 JT2, JT3, J3A, J4, J5, J6, and J7 connecting cables
from CM2.
8. Remove CM2 from the six support standoffs by using a small
flat-bladed screwdriver to push in the latches on each standoff.
9. Position the new CM2 board over the six standoffs. Verify that
each latch snaps and locks in place.
10. Reconnect JT2, JT3, J3A, J4, J5, J6, and J7 connecting cables to
CM2.
11. If the rectifier is to be restored to service, refer to Section 7,
“Restore Rectifier to Service.”
