Installation guide

3-2 Cisco 4000 Series Installation Guide
Accessing the Internal Components of the Router
Warning Do not touch the power supply when the power cord is connected. For systems
with a power switch, line voltages are present within the power supply even when the power
switch is off and the power cord is connected. For systems without a power switch, line
voltages are present within the power supply when the power cord is connected. (To see
translated versions of this warning, refer to the appendix “Translated Safety Warnings.”)
Warning Before working on a chassis or working near power supplies, unplug the power
cord on AC units; disconnect the power at the circuit breaker on DC units. (To see translated
versions of this warning, refer to the appendix “Translated Safety Warnings.”)
Removing the Component Tray
Some Cisco 4000 series routers have a safety latch tab on the chassis that affects removing
the component tray. (See Figure 3-1 and Figure 3-2.)
If you have a chassis with a safety latch tab, follow the procedure in the next section
“Removing the Component Tray from a Chassis with a Safety Latch.”
If you have a chassis without a safety latch tab, follow the procedure in the section
“Removing the Component Tray from a Chassis without a Safety Latch.”
Removing the Component Tray from a Chassis with a Safety Latch
Take the following steps to remove the component tray from a chassis with a safety latch:
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 3-1.)
Step 5 Pull on the handle located on the upper right corner of the chassis to slide the
component tray out of the chassis shell until the safety latch catches. (See
Figure 3-1.)