
Lucent Technologies Lineage
®
2000 125A Ferroresonant Rectifier J85502C-1
Issue 8 July 1999
Spare Parts and Replacement Procedures 8 - 7
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 fuse 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
rectifier door.
6. Locate the CM2 control board.
7. Disconnect J2A from CM2 by unlatching first, then
pulling the cable connector.
8. If the CM6 AC Monitor card is not in place, disconnect the
J1A connector on the cable from the CM1 option board. If
CM6 is in place, remove it and the Y, R, and S leads for it
from points E2, E4, and E9, respectively, on CM2. The
ribbon cable may remain connected to CM6. (If BK and W
leads of CM6 are connected to E1 and E3 of CM2, remove
them also but then cut off and discard.)
9. Disconnect the J3A connector on the cable from the CM3
digital meter board.
10. Remove the CM2 control board from the six support
standoffs by using a small flat-bladed screwdriver to push
in the latches on each standoff.
11. Position the new CM2 control board over the six standoffs.
Verify that each latch snaps and locks in place.
12. Connect J3A to P3A on the new CM2 control board.
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.