Cisco 7000 Replacement Instructions Manual page 13

Step 10
Step 11
Caution
prevents an overtemperature condition that can result in severe equipment damage.
Installing a New Blower
Install the new chassis blower as follows:
Step 1
Warning
cord. Use extreme caution when working near the backplane; high voltage is present when the
system is operating.
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
Step 9
Step 10
Lift the blower out of the chassis and place it aside.
Do not replace the front chassis panels until you install a new blower. If the system is
inadvertently turned on without the blower installed, the internal chassis components may
overheat, which can result in severe equipment damage.
Operate the system only if the blower is installed and functioning properly. The blower
Ensure that the power supplies are still turned OFF.
Before accessing the chassis interior, turn the system power OFF and unplug the power
Note the orientation of the two air ducts on the back of the new blower and the two cutouts
in the backplane. The two ducts fit snugly into the backplane cutouts.
Hold the blower with the two air ducts facing away from you, and the three captive screws
along the bottom of the side facing you (in the orientation shown in .) Lay the connector
and wiring on top of the blower to keep it out of the way while you install the blower.
Place the blower into the front chassis cavity so it rests on the floor of the chassis, then lift
the blower up slightly and align the air ducts with the backplane cutouts.
Push the air ducts into the cutouts. If necessary, wiggle the blower slightly as you are
pushing it inward (the ducts fit snugly into the cutouts) until the edges of the blower meet
the backplane.
Use the T-handle driver or screwdriver to turn each of the captive screws clockwise about
two full turns to ensure that they are aligned in the backplane holes. You should not feel
much resistance. If a screw is hard to turn, do not force it. Wiggle the blower around, ensure
that the screw is straight, and try tightening the screw again. If after several attempts the
screw does not tighten easily, refer to the following section "Checking the Installation" for
further instructions.
Tighten each of the three captive screws by turning them clockwise. Use the same
alignment hole in the chassis to guide the driver to the far left screw.
Locate the blower power connector port (see Figure 7), which is under the white power bar
on the backplane. Both the port and the connector are keyed so the notched or flat edge of
the connector is at the bottom.
Hold the blower power connector with the flat edge down and the red or purple (+24V) wire
to the left, and plug the connector into the backplane connector. When the connector is fully
inserted, two plastic tabs snap outward to secure the connector in place.
Replace the top and bottom front chassis panels (refer to the section "Removing and
Replacing the Front Chassis Panels" on page 6) and proceed to the next section to verify
the installation.
Cisco 7000 and Cisco 7507 Air Filter and Chassis Blower Replacement Instructions
Replacing the Chassis Blower
13