Lucent Technologies Lineage
®
2000 400A, 60Hz Ferroresonant Rectifier J85503C-3
8 - 6 Spare Parts and Replacement Procedures
Issue 10 July 2000
Replacing
Circuit Packs
This section gives step-by-step instructions for replacing circuit
modules CM1 through CM4 and CM7.
Warning: Minimize electrostatic discharge when handling circuit
modules. Do not connect or disconnect circuit modules with voltages
present or equipment damage may occur. AC voltages may be
present when the rectifier Power switch is off.
Caution: Support the circuit packs with your hands when
connecting and disconnecting the cables, or damage to the boards
may result. Do NOT disconnect cables by pulling the cable.
CM1 Fuse Board
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 REG fuse associated with the
rectifier.
5. At the rectifier, loosen the locking screws and open the door.
6. Measure the voltage on each of the C7 through C12 capacitors.
Discharge to below 20 volts before proceeding.
7. Disconnect control cable connector J5A from the CM4 board by
unlatching first, then pulling the connector.
8. Remove all cables from CM1 by unlatching first, then pulling the
cable connector.
9. Remove CM1 from its four support standoffs by using a small
flat-bladed screwdriver to push in the latches on each standoff.
10. Position the new CM1 over the four support standoffs. Verify that
each latch snaps and locks in place.
11. Reconnect all cables that were disconnected in Step 7.
12. If the rectifier is to be restored to service, refer to Section 7,
“Restore Rectifier to Service.”