Cisco 7000 Series Replacement Instructions Manual page 12

12Cisco 7000 Air Filter and Chassis Blower Replacement Instructions
Purple (+24V)
Blower
Figure 8 Blower Power Connector
Step 4:
Disconnect the blower's power connector from the backplane by pinching
the sides of the connector inward and pulling the connector out and away
from the backplane. Lay the connector and wiring on top of the blower to
keep it out of the way while you remove the blower.
Step 5:
Using the long T-handle driver or Phillips screwdriver, loosen each of the
three captive screws by turning them counterclockwise two full turns. Use
the access hole in the lower lip of the chassis to guide the driver straight into
the hole to the for left screw.
Step 6:
When all three screws are loosened, unscrew them completely from the
backplane. These captive screws are fixed to the blower; do not attempt to
remove them completely.
Step 7:
Two air ducts on the blower extend into the two cutouts in the backplane (see
Figure 1). Grasp the blower with both hands and pull it outward (toward you
and away from the backplane) while gently rocking it slightly up and down,
and left to right, to free the blower ducts from the backplane.
Step 8:
If the blower does not budge, check the three screws and ensure that they are
free (they are fixed to the blower, but they should spin freely).
Step 9:
Pull the blower outward using steady pressure and wiggling it until it is free
from the backplane.
Step 10:
Lift the blower out of the chassis and place it aside.
Step 11:
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.
Backplane
Blower power connection
Black (ground)