Installation guide

3-4 Cisco 4000 Series Installation Guide
Accessing the Internal Components of the Router
Step 1 Turn OFF the system power.
Step 2 Put on your ESD-preventive wrist strap.
Step 3 Remove all network and power cables.
Step 4 Loosen the nonremovable chassis release screw on the rear panel of the chassis.
(See Figure 3-2.)
Figure 3-2 Component Tray Removal for Chassis Without a Safety Latch
Caution
Support the component tray from underneath, either on your work surface or
with your hands, to prevent it from falling. (To see translated versions of this warning, refer
to the appendix “Translated Safety Warnings.”)