Lucent Technologies Lineage
®
2000 125A Ferroresonant Rectifier J85502C-1
8 - 14 Spare Parts and Replacement Procedures
Issue 8 July 1999
Volts Adjust
Potentiometers:
Output Volts
(R4) and Equalize
Volts (R5)
1. Note that the potentiometer mounting bracket is attached
to the CBA1 bracket assembly with two screws located
above and below the +V and –V fuses. (The +V and –V
fuses can only be seen with the door open). Remove the
two screws to separate the potentiometer mounting bracket
from the CBA1 bracket.
2. Noting their positions for reassembly, unsolder the wires
from the potentiometer (R4 or R5) being replaced.
3. Remove nut to free the potentiometer.
CBA1 Bracket
Assembly
1. Disconnect the cable from the top of the – bus or from the
top of shunt R3 that is connected to the top of the circuit
breaker.
2. Remove the two screws that hold the CBA1 bracket to the
rectifier cabinet.
3. Rotate the CBA1 bracket to the right and remount to the
outside of the cabinet flange. This will provide access to
Figure 8-1: Typical J85502C-1 125-ampere Rectifier
with Door Open and Diode Heat Sink Removed
CM2 control
board (205A1)
CM6 ac/dc voltage
monitor board (434A
or B) mounted on
connector JA1
of CM2
Label showing
major components,
ac field wiring, and
torque values
K1 contactor
mounted on
back wall
Equalize volts
adjustment
potentiometer
CBA1 circuit
breaker
CM3 digital
meter board
(207A)
CM1 option
board
(ED-83158-30)
K2 relay
Auxillary
transformer
DC capacitors
C1-C8 are
mounted behind
bus bars
Diode heat sink
assembly, not shown,
mounts on insulator
bracket
AC capacitors
DC inductor
AC inductor
Thyristor/triac
Main
transformer
