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Lucent Technologies Lineage
®
2000 ECS-12 Controller J85501D-2
4 - 18 Installation and Setup
Issue 3 August 1998
Replacement of
Multiplexing
Board
If the multiplexing board (BCC1), illustrated in Figure 4-7, must
be replaced, open the front cover, and pull out the drawer.
Unplug any field wiring connected to CP1, CP2, or CP3 by
lifting the terminal blocks off the board.
Lifting the front of the drawer, pull it out of the controller chassis
completely and unplug the two ribbon cables at the multiplexing
board BCC1 (P705 and P706) and the green ground lead.
Unplug the remaining ribbon cable connections to the board,
noting the location of each so that they can be reconnected later.
The multiplexing board is mounted to the chassis by five screws.
The controller chassis can be removed from the frame if
necessary for access to the board. Replace the board and
reconnect ribbon cables and ground wire as they were.
Figure 4-7: Rectifier Multiplexing Circuit Pack
J705
J706
J708
J707
J702
J701
J704
J703
BCC1 PWB
Connections to
Rectifier Shelves
Connections to Backplane
Connections to
LVD/Fuse Board