Nortel DMS-100 Series Maintenance Manual page 571

Star Remote System routine maintenance procedures
Summary of fan replacement
At the SRMO site
1 Continue only if you were directed to this procedure from a step in a
maintenance procedure. Using this procedure independently may cause
equipment damage or service interruption.
2 Open the SRMO cabinet front door. Open the telephony subsystem (TSS)
front cover by loosening the two screws on the left side of the cover.
3 Power down the fans by removing the fan fuse on the dc panel.
4 Use a slot screwdriver to loosen the three 1/4-turn locking screws. Remove
the protective cover from the fans and heater.
5 Use a pair of small wire cutters to cut the cable ties that fasten the fan wiring
in the cable harness.
6 Below the dc panel, disconnect the connector for the fan being replaced.
7 Use a Phillips screwdriver to remove the two screws that hold the fan with
faults.
8 Install the new fan, taking note of the airflow and position indicators for correct
position. Route the wires into the wiring harness.
9 Below the dc panel, connect the connector for the new fan.
10 Fasten the fan wiring to the cable harness with new cable ties.
11 Install the two screws and use a Phillips screwdriver to tighten the two screws
that hold the fan.
12 Install the protective cover for the fans and heater. Use a slot screwdriver to
lock the three 1/4-turn locking screws.
13 Replace the fan fuse that was removed in step 2 in the dc panel
14 You have correctly completed this procedure. Return to the main procedure
that sent you to this procedure and continue as indicated.
DMS-100 Family NA100 Star Remote System XPM15 and up
13-13
Fan replacement
SRMO
(end)