Cisco 2525 Betriebsanweisung PDF herunterladen (Seite 116)

A-4 Cisco 2524 and Cisco 2525 Router User Guide

Opening the Chassis

Tools Required

You will need the following tools 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 Chassis Cover

You must open the router chassis to gain access to its interior components: the system card,

system-code single in-line memory modules (SIMMs), and DRAM SIMMs. When opening

the chassis, refer to Parts A and B in Figure A-2.

Warning Before opening the chassis, disconnect the telephone-network cables to avoid

contact with telephone-network voltages. (To see translated versions of this warning, refer

to the appendix “Translated Safety Warnings.”)

Take the following steps to remove the chassis cover:

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 router.

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 A-2, Part A.)

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Cisco 2525 Betriebsanweisung Seite 116