Accessing Internal Modules; Removing And Replacing The Chassis Cover; Removing The Cover; Replacing The Cover - Cisco 4451-X Hardware Installation Manual

Chapter 6 Installing and Upgrading Internal Modules and FRUs

Accessing Internal Modules

To access the internal modules on the router., you must first remove the chassis cover. See the
and Replacing the Chassis Cover, page 6-4
chassis cover on the Cisco ISR 4451-Xs.

Removing and Replacing the Chassis Cover

The Cisco ISR 4451-Xs have a removable cover.
Caution Do not run the router with the cover off. Doing so can cause the router to overheat very quickly.
Warning Before opening the unit, disconnect the telephone-network cables to avoid contact with
telephone-network voltages. Statement 1041
Note Use a number-2 Phillips screwdriver to perform the following tasks.

Removing the Cover

To remove the cover, perform the following steps.
Read the
Step 1
any module replacement.
Step 2 Confirm the router is turned off and disconnected from the power supply or power supplies. If a
redundant power is used, disconnect from the redundant power supply.
Step 3 Place the chassis on a flat surface.
Step 4 Remove the three cover screws at the back of the router cover. See
Step 5 Lift the cover from the back edge to a 45-degree angle.
Pull the cover toward you to disengage the slots along the front (bezel) edge of the chassis. See
Step 6
Figure

Replacing the Cover

To replace the cover, perform the following steps.
Read the
Step 1
replacement.
Confirm the router is turned off and disconnected from the power supply or power supplies. If a
Step 2
redundant power is used disconnect from the redundant power supply.
Place the chassis on a flat surface.
Step 3
OL-27644-01
"Safety Warnings" section on page 6-2
6-1.
Safety Warnings, page 6-2
Hardware Installation Guide for the Cisco 4451-X Integrated Services Router
for instructions on how to remove and later replace the
and disconnect the power supply before you perform
and disconnect the power supply before you perform any module
Accessing Internal Modules
Removing
Figure 6-1.
6-4