Removing and Replacing the Front Chassis Panels
Removing and Replacing the Front Chassis Panels
To access the air filter, you must remove the bottom front chassis panel. To access the chassis interior
to replace the blower, you must remove the top and bottom front chassis panels. Carefully follow
the instructions for removing and replacing the top front panel because you can damage or destroy
the LED board or top front panel by forcing a misaligned panel onto or off of the chassis body.
Warning
AC units; disconnect the power at the circuit breaker on DC units. (For translations of this safety
warning, refer to the section "Power Supply Disconnection Warning" on page 16.)
Warning
disconnect the two power supply cords before servicing the unit. (For translations of this safety
warning, refer to the section "Electric Shock Warning" on page 17.)
Note
Warning
the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel board that
services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch handle of
the circuit breaker in the OFF position. (For translations of this safety warning, refer to the section
"DC Power Disconnection Warning" on page 17.)
Removing the Panels
You must remove the bottom front panel before you can remove the top front panel. The plastic
bottom front panel is attached to the chassis with ball studs. The top front panel is attached to the
chassis with two captive screws. The EMI shielding around the outer edge of the top front panel acts
as a spring and compresses when you push the panel into the chassis to keep the panel fitted tightly
into the chassis opening. To remove the front panels, perform the following steps:
Step 1
Step 2
Step 3
6 Cisco 7000 and Cisco 7507 Air Filter and Chassis Blower Replacement Instructions
— To loosen the captive screws on the blower, you need a long (9 inches or longer) Number 2
Phillips screwdriver or a long (9 inches or longer) 3-mm center-hex Allen wrench. (The first
few hundred systems shipped used Phillips screws; all subsequent chassis used Allen-head
screws.) A 3-mm Allen-head T-handle driver is shipped with all spare blowers.
Before beginning the replacement procedure, check the blower to determine which tools you will
need.
Before working on a chassis or working near power supplies, unplug the power cord on
This unit might have more than one power cord. To reduce the risk of electric shock,
The following warning is for units equipped with a DC-input power supply.
Before performing any of the following procedures, ensure that power is removed from
Grasp the bottom edge of the bottom chassis panel.
Pull the bottom of the panel out about one inch, then place your fingers behind the sides of
the panel and pull it off the chassis. (See Figure 3, on page 7.)
On the top front panel, use a screwdriver to loosen the two captive screws at the bottom
edge of the panel frame.
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