Nortel Meridian 1 Replacement Manual page 200

Page 200 of 362
553-3001-520 Standard 16.00 April 2000
Replacing equipment
— With DC power, set the switch on the NT6D43 CE/PE Power
Supply to OFF (down). Set the circuit breaker for just this module to
OFF (down) in the rear of the pedestal. (All other modules in the
column retain power.)
3 Remove the NT8D22 System Monitor in the rear of the pedestal. (Do not
turn off the blower unit in the front of the pedestal.)
Note: Disconnect the RJ11 cables before you pull the system monitor
out of the pedestal.
If the system monitor is not removed, the system may shut down.
4 Remove all cards from the module:
a Tag and disconnect cables to all faceplate connectors.
b Tag cards so they can be returned to the same slot. Remove cards.
5 Disconnect cables, plugs, and wires from the rear of the module to the
backplane:
a Remove the I/O safety panel by turning the screws on each side. Set
the cover aside.
b Tag and disconnect all cables from the backplane to the interior of
the I/O assembly.
c Tag and disconnect all plugs, wires, and cables to the backplane.
6 Remove the two mounting screws that secure the rear of the card cage to
the module.
7 Remove the front cover plates on both sides of the card cage.
8 Remove the three mounting screws that secure the front of the card cage
to the bottom of the module. Pull the card cage out of the module.
Installing equipment
1 Slide the replacement card cage into position in the module. Install the
mounting screws at the front of the card cage.
2 Replace the front cover plates on both sides of the card cage.
CAUTION