Nortel Contivity 5000 Installing page 89

Chapter 4 Installing option cards and field replaceable units 89
Each fan tray has a bundle of cables attached to it. The cables are terminated
by two 3-hole plugs. When you replace a fan tray, you must attach the fan
plugs to the correct connectors on the system board. (However, either plug can
go onto either of the connectors.)
Caution: Do not remove the fan tray cables from the system board until
you are certain that you know where to attach them again when you
replace the fan tray (see
6
After you note the location of the fan plugs, disconnect the plugs for the fan
tray that you are replacing from the system board.
7
Remove the cables from the plastic hooks that secure them to the chassis base
and to the fan tray itself.
8
Using a flat-tip screwdriver, unscrew the single captive screw in the center of
the fan tray (see
9
Insert two fingers into the holes on top of the fan tray and pull it straight up,
out of its enclosure.
The front fan tray is contained in a bay; the rear fan tray rests on a metal
support.
10 Insert two fingers into the holes in the replacement fan tray and lower it
straight down to install it
If you are replacing the front fan tray, the fans face the outside of the chassis;
for the rear fan tray, the fans face the inside of the chassis.
Note: There is only one type of fan tray for the Contivity 5000. You
install the same fan tray in the front or the rear of the chassis.
11 Insert the single captive screw into the hole in the bay (front fan tray) or the
support (rear fan tray) and use the flat-tip screwdriver to secure the screw
(Figure 43).
12 Secure the cables to the side of the fan tray and to the chassis base by inserting
the cable bundles into the small plastic hooks.
Figure 42 on page
Figure 42 on page 88).
(Figure 43).
88).
Installing the Contivity 5000