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Cisco AS5350 Universal Gateway Chassis Installation Guide
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Appendix
Replacing the Boot ROM
Replacing the Boot ROM To upgrade the boot ROM software to a new software image, you must replace the existing boot ROM.
Required Tools and Equipment
You will need the following tool s an d equipment:
•ROM extraction tool
•One boot ROM
•ESD-preventive wrist strap
Boot ROM Replacement
Caution A PLCC-type boot ROM d oe s not have pins that plug i nto the socket; instea d , t he contacts are on the
sides of the boot ROM and along the inner sides of the socket. Therefore, you cannot use a small
flat-blade screwdriver to remove a PLCC-type boot ROM. Forcing a small screwdriver or other tool
between the boot ROM a nd the sides of the socket to pry out the boot ROM will damage the component,
the socket, or both.
To replace the boot ROM, follow these steps:
Step 1 Turn the power switch on th e un ive rs a l g ateway off and disconnec t site power.
Warning
Before opening the chassis, disconnect the telephone-network cables to avoid contact with
telephone-network voltages. To see translations of the warnings that appear in this publication, refer
to the Regulatory Compliance and Safety Information document that accompanied this device.
Step 2 Remove all interface cables from th e r ea r panel of the universal gateway.
Step 3 Attach an ESD-preventive wrist strap .
Step 4 Remove the chassis cover. (See the instructions in the sect ion “Removing the Chassis Cover” section on
page A1.)
Step 5 Remove the carrier card to access t he s yst em board. (See the Cisco AS5350 Universal Gateway Card
Installation Guide for instructions on removing the carrier card. This document is available on
Cisco.com and the document ation CD-ROM that comes with your universal gateway. See the “Obtainin g
Documentation” section on pagexiii.)