Preventing Electrostatic Discharge Damage - Cisco 7500 Series Replacing Manual

Chassis interface board

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Installation Prerequisites

Warning

with telephone-network voltages. (For a translation of this safety warning, refer to the section

"Translated Safety Warnings" on page 32.)

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) damage, which can occur when electronic cards or components are

improperly handled, results in complete or intermittent failures. Following are guidelines for

preventing ESD damage:

•

Caution

should be between 1 and 10 megohms.

List of Parts and Tools

Following are the tools and equipment that you will need to complete the CI replacement:

•

4 Replacing the Chassis Interface (CI) Board in the Cisco 7500 Series Chassis

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

Always use an ESD-preventive wrist or ankle strap and ensure that it makes good skin contact.

Connect the equipment end of the strap to a captive installation screw on an installed power

supply.

Handle the CI by the edges only; avoid touching the board or connector.

Place a removed CI board-side-up on an antistatic surface or in a static shielding bag. If the

component will be returned to the factory, immediately place it in a static shielding bag.

Avoid contact between the CI and clothing. The wrist strap only protects the board from ESD

voltages on the body; ESD voltages on clothing can still cause damage.

For safety, periodically check the resistance value of the antistatic strap. The measurement

ESD-preventive equipment (a disposable wrist strap is included with all spares and upgrade kits)

Antistatic mat, foam pad, or bag for the removed CI (immediately place a removed board into an

antistatic bag if you will return it to the factory)

3/16-inch, ﬂat-blade screwdriver; Number 1 and Number 2 Phillips screwdrivers

CI board for your Cisco 7500 series chassis (MAS-7500CI=)

Table of Contents

Mas-7500ci series