Nortel Meridian 1 Hardware Replacement Manual page 189

Figure 29
NT8D53CA Power Distribution Unit AC
Main circuit
breaker
3 Loosen the three mounting screws that secure the field wiring access
plate. Lift the plate over the screws and set it aside.
4 Tag and disconnect wiring to the LRTN, GND, L2, and L1 connections
on the right side of the field wiring terminal (see Figure 30 on
page 190). Push all the wires down into the empty area under the
pedestal
CAUTION
Damage to Equipment
Label wires carefully. They must be reconnected
correctly or the system may be damaged.
.
5 Tag and disconnect cables to the NT8D22 System Monitor. Loosen the
two retaining screws on the system monitor. Remove the card.
6 Disconnect cables to the module above the pedestal (module 0):
a. Remove the rear cover on the module.
b. Remove the I/O safety panel over the backplane in the module.
Replacing equipment
System monitor
Mounting screw
Power distribution
Mounting screws
unit—AC
Page 189 of 250
553-3013
Hardware Replacement