Removing And Replacing The Front Chassis Panels; Tools Required; Removing The Panels - Cisco 7000 Hardware Installation And Maintenance

Removing and Replacing the Front Chassis Panels

This section provides the procedures for removing and replacing the chassis top front panel
(MAS-7KTFP) and bottom front panel (MAS-7KBFP) in order to access the internal chassis
components and to replace the panels that have been damaged.
The air filter and replaceable internal components are accessible by removing the top and bottom
front panels of the chassis. The bottom front chassis panel is vented and works with the chassis
blower to draw cooling air into the chassis. If the bottom panel is not installed correctly, or if it is
cracked or broken, the flow of cooling air can be redirected and may cause overheating inside the
chassis. Replace panels if they are cracked or broken, or if damage prevents them from fitting on the
chassis properly.
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 screws. If you are cleaning the air filter, you do not have to shut down the system
if you can remove the filter, vacuum it, and replace it in less than five minutes. Always shut down
the system before removing the chassis top front panel. With the top front panel removed, 100A of
current is exposed on the front of the backplane and around the power supply wiring harnesses.
Warning
power cord. When the power is on, high current (100A) is exposed on the backplane and around the
power supply and wiring harnesses. Use extreme caution when working near the power supply.

Tools Required

You need a 3/16-inch flat-blade or number 1 Phillips screwdriver to remove the top front chassis
panel. Earlier chassis (the first several hundred shipped) use slotted screws, and later chassis use
Phillips screws to secure the top front panel to the chassis. No tools are required to remove the
bottom front chassis panel.

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 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
Step 4
Step 5
Before accessing the chassis interior, turn off all power supply switches and unplug the
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 5-27.)
On the top front panel, use a number 1 Phillips or a 3/16-inch flat-blade screwdriver to
loosen the two captive screws at the bottom edge of the panel frame. (See Figure 5-28.)
Place one hand against the top front center of the panel to brace it. (See Figure 5-28a.) The
top of the panel acts as a pivot point when you pull the bottom out and away from the
chassis.
With your other hand, grasp the front of the panel by inserting your fingers into the opening
on the underside of the front plastic panel. (See the right hand in Figure 5-28a.)
Removing and Replacing the Front Chassis Panels
Maintenance 5-233