User guide

B-2 Cisco 2500 Series Access Server User Guide

Opening the Chassis

This section describes the procedure for opening the chassis by removing the chassis cover.

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 Do not work on the system or connect or disconnect cables during periods of

lightning activity. (To see translated versions of this warning, refer to the appendix

“Translated Safety Warnings.”)

Tools Required

The following are the tools you will need to open the chassis:

• Medium-size ﬂat-blade screwdriver (1/4 inch [0.625 cm])

• Size M 3.5 (metric) hex-head nut driver (optional)

Removing the Cover

You must open the access server chassis to gain access to its interior components: the

system card, system code single inline memory modules (SIMMs), and dynamic random

access memory (DRAM) SIMMs. Following are the steps required to remove the chassis

cover. When opening the chassis, use Parts A and B in Figure B-1 as guides.

Step 1 Turn OFF the power but, to channel electrostatic discharge (ESD) voltages to

ground, do not unplug the power cable.

Step 2 Remove all interface cables from the rear panel of the access server.

Step 3 Turn the unit upside down so that the top of the chassis is resting on a ﬂat surface,

and the front of the chassis is toward you. (See Figure B-1, Part A.)