Northern Telecom DMS-100 Series Maintenance Manual page 227

Procedure 7-4
Replacing the fan behind the rover interface panel
Step Description
5 Remove the Fan Assembly.
6 Remove the two fan mounting screws that
hold the fan assembly in place.
7 Slide the fan assembly forward out of the
chassis and disconnect the power cable.
8 Remove the fan from the mounting bracket.
9 Remove the protective wire mesh screen
from the fan.
10 Mount the screen on the replacement fan.
11 Mount the replacement fan in the position
vacated by the faulty fan on the mounting
bracket.
12 Position the mounting bracket in front of the
chassis; reconnect the power cable.
13 Slide the fan mounting bracket in until it is
fully seated.
14 Secure the fan assembly.
15 Mount the filler panel in the chassis.
16 Reinstall the front panels of the DPP.
Notes:
Note 1: When replacing the screws, align carefully before tightening to avoid stripping. Tighten the screws, alternating until
all are equally tight. Do not "cinch down" any one screw until all are properly aligned; no binding or force needed to turn.
(continued)
Notes
Look inside the space vacated by the Rover
panel and locate the two screws securing
the Fan Assembly.
Save the screws for later use.
Lay the mounting bracket in safe place.
Clean the screen at this time, if needed.
Use the screws from step 6.
Make sure there are no obstructions.
Replace the two screws removed in step 6.
Do not overtighten the screws.
Use the screws from step 4.
End
DPP Recovery and Routine Maintenance Guide BCS35 and up
Routine maintenance 7-13
1