Lucent Technologies Lineage
®
2000 50A Ferroresonant Rectifier J85502B-1
Issue 6 May 1999
Spare Parts and Replacement Procedures 8 - 7
17. Reconnect all cables that were disconnected in Step 8.
18. If the rectifier is to be restored to service, refer to
“Restoring a Rectifier to Service” in Section 7.
Replacing CM2
Control Board
Follow instructions in “Handling Circuit Modules” to minimize
electrostatic discharge when handling circuit modules.
1. Turn the rectifier POWER switch Off.
2. Turn the rectifier (CBA1) DC OUTPUT 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
rectifier door.
6. Locate the CM2 control board.
7. Disconnect the cable from P2A on CM2 by unlatching
first, then pulling the cable connector.
8. If CM5 is not in place, disconnect the ribbon cable from
P1A on CM2.
If CM5 is in place, remove it from CM2, leaving the
ribbon cable connected to CM5; also remove the Y, R, and
S leads of CM5 from points E2, E4, and E9, respectively,
on CM2. (If BK and W leads of CM5 are connected to E1
and E3 of CM2, remove BK and W leads from CM2, cut
off at CM5, and discard.)
Caution
Support the CM2 control board with your hands when
connecting and disconnecting the cables, or damage to the
board may result.
Do NOT disconnect cables by pulling the cable.
