Nortel DMS-100 Series Maintenance Manual page 23

The power converter card is at the far left of the LCA shelf (slots 01–03).
The control complex cards occupy slots 04 and 05. The five line drawers fill
the remainder of the shelf.
Power converter card
The power converter card (NT6X53) is in slots 01–03 of the LCA. This
card contains circuits that convert a –48V office battery to regulated +5V
and +15V outputs for shelf circuits.
The power converter contains relay circuits that control the application of
the following from the ringing generator to the LCM line circuits:
ringing
automatic number identification (ANI)
coin voltages
One power converter can supply power to both shelves of the LCM if the
mate converter fails.
Line concentrating array (LCA) shelf layout
LCA
Power
converter
Slot
0 0 0 0
:
1 2 3 4
DMS-100 Family OPAC Maintenance Manual XPM12 and up
Odd Odd
LSG LSG
Even Even
LSG LSG
0
5
Maintenance overview 1-7
Odd Odd
LSG LSG
Even Even
LSG LSG
Line
drawers
Odd
LSG
Even
LSG