Installation guide

8 Upgrading Memory in Cisco 4000 Series Routers
Removing the Component Tray
Removing the Component Tray
To gain access to the router’s memory, you must first remove the component tray from the chassis.
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.
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.
The following warning applies to routers with DC power supplies:
Warning Before performing any of the following procedures, ensure that power is removed from
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.
Some Cisco 4000 series routers have a safety latch tab on the chassis (see Figure 2) and others do
not (see Figure 3).
Figure 2 Chassis with a Safety Latch
Rear of chassis
Handle
AUX
CONSOLE
INPUT 100-240VAC 50/60HZ 3.0-1.5 AMPS
Safety latch tab
Hand supporting
component tray
H1965
Chassis shell
Chassis release
screw