Lucent Technologies Lineage
®
2000 125A Ferroresonant Rectifier J85502C-1
Issue 8 July 1999
Spare Parts and Replacement Procedures 8 - 17
rectangular-shaped insulator bracket by four screws. The
insulator bracket is, in turn, mounted to a metal bracket (attached
to main transformer T1) by two screws at the extreme left of the
bracket. The metal bracket has a rounded tab with a threaded
hole that protrudes through an oval hole in the insulator bracket,
just to the right of its two mounting screws. This tab can be used
to mount the heat sink sideways (its left side will face to the rear
of the unit) in order to access the rectifier diode mounting nuts
and common (center-tapped) cable. Full access to the
components behind can be gained by disconnecting the common
cable and moving the heat sink out of the way (in front of T1).
To relocate the diode heat sink assembly, proceed as follows:
1. While supporting the heat sink, remove the two insulator
bracket mounting screws. Then, pull the bracket off of the
tab and rotate the heat sink 90
o
clockwise (from looking
down on the unit).
2. Using one of the two mounting screws just removed,
mount the insulator bracket and heat sink to the T1 metal
bracket by passing the screw through the oval-shaped tab
hole, from the right. Then, turn the screw into the threaded
hole in the tab of the T1 metal bracket. Tighten the screw
securely. The diode mounting nuts and common heat sink
nut can now be accessed. The diodes can be either tested or
removed. See “Rectifier Diode Test and/or Replacement”
in this section.
3. If the heat sink is to be moved completely out of the way,
disconnect the heat sink common lead from its connection
point on the bus bar assembly (note the position for
subsequent reconnection) and safely support it in front of
T1.
AC Inductor (L1)
1. Perform the steps in “Diode Heat Sink Assembly” in this
section to move the diode heat sink assembly completely
out of the way.
Note
Steps 1 and 2 of this procedure apply to both (24- and 48-volt)
versions of the rectifier.
