Nortel DMS-10 Series Installation, Operation And Maintenance Manual page 461

Replacing the Fan behind the Filler Panel
Use Procedure 6-7 to replace the fan behind the Filler panel on the front of the
lower processor chassis.
Procedure 6-7
Filler panel fan replacement
Step Description
CAUTION
Since all PCAs, disk drives, and other hardware in the BMC are static
sensitive, be cautious. Wear a wrist grounding strap when working with
the BMC. Jacks at the lower right of the Filler panel (B chassis) and the
lower right of the Switch and Status Panel (A chassis) are provided to
accept the banana plug connection on the end of a grounding strap.
WARNING
Since the BMC is powered up during this procedure, observe all safety
procedures for operations on live equipment
66
Request a polling session from HOC personnel. Explain that maintenance activity is
scheduled at the BMC and it should be polled as a precaution.
67
Remove the front panel on the A chassis. See Figure 6-5. Loosen the four captive
screws on the left and right of the front panel and carefully remove it. Put it in a safe place
to avoid damage.
68
At the Switch and Status Panel:
a. Determine whether the unit is in A processor mode. Proceed to step 4 if the unit is
already in A ONLY mode. Otherwise, set the A/B processor switch to A.
b. Make the P/O processor Mode Select Switch O. Make the A processor the ONLY
processor.
c. Turn the Mode Switch Key to the right and release.
69
Remove the Filler panel from the B chassis. The Filler panel is in the same position as the
Switch and Status panel on the A chassis. Remove the two slotted screws from the panel
to take it out of position. Hold this panel tightly since it comes loose. The ground jack
terminal wire connections are mounted on the back of the panel. Save the screws for later
use.
BMC II BISYNC Operation, Administration, and Maintenance Guide BMCB001 and up
Section 060-INDP-610 Maintenance Procedures Guide 6-23
Sheet 1 of 2