Installation guide

Upgrading Memory in Cisco 4000 Series Routers 9
Removing the Component Tray
Figure 3 Chassis without a Safety Latch
Follow these steps to remove the component tray from a chassis:
Step 1 Turn OFF the power.
Step 2 Attach your ESD-preventive wrist strap.
Step 3 Remove all network and power cables.
Warning Before opening the chassis, disconnect the telephone-network cables to avoid contact
with telephone-network voltages.
Warning Do not work on the system or connect or disconnect cables during periods of lightning
activity.
Step 4 If you have a DC-powered router, follow these steps to remove the power cables:
• Use a screwdriver to loosen the captive installation screws on the terminal block cover.
• Lift and remove the terminal block cover.
• Use a screwdriver to remove the three power leads from the terminal block in the
following order: negative, positive, then ground.
Step 5 Using a Number 2 Phillips screwdriver, loosen the nonremovable chassis release screw
on the rear panel of the chassis.
Caution When you remove the component tray from the chassis, support it from underneath, either
on your work surface or with your hands.
AUX
CONSOLE
INPUT 100-240VAC 50/60HZ 3.0-1.5 AMPS
H2899
Rear of chassis
Handle
Support the component
tray with your hand
Chassis shell
Chassis release
screw