Preventing Electrostatic Discharge Damage; Removing And Replacing The Power Supply - Cisco 7606-S Installation Manual
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Preventing Electrostatic Discharge Damage
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. Port adapters and processor modules
consist of printed circuit boards that are fixed in metal carriers. Electromagnetic interference (EMI)
shielding and connectors are integral components of the carrier. Although the metal carrier helps to
protect the board from ESD, use a preventive antistatic strap during handling.
Following are guidelines for preventing ESD damage:
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For safety, periodically check the resistance value of the antistatic strap. The measurement should be
Caution
between 1 and 10 megohm (Mohm).
Removing and Replacing the Power Supply
This section describes how to remove and install power supplies for the Cisco 7600 series routers.
In systems with redundant power supplies, you can replace the faulty supply while the system is
Note
operating.
Required Tools
A flat-blade or number 2 Phillips-head screwdriver is required to perform these procedures.
Additionally, a wire cutter or scissors is necessary for cutting cable tie-wraps.
Cisco 7600 Series Router Installation Guide
5-2
Always use an ESD wrist or ankle strap and ensure that it makes good skin contact.
Connect the equipment end of the strap to an unfinished chassis surface.
When installing a component, use any available ejector levers or captive installation screws to
properly seat the bus connectors in the backplane or midplane. These devices prevent accidental
removal, provide proper grounding for the system, and help to ensure that bus connectors are
properly seated.
When removing a component, use any available ejector levers or captive installation screws to
release the bus connectors from the backplane or midplane.
Handle carriers by available handles or edges only; avoid touching the printed circuit boards or
connectors.
Place a removed component board-side-up on an antistatic surface or in a static shielding container.
If you plan to return the component to the factory, immediately place it in a static shielding
container.
Avoid contact between the printed circuit boards and clothing. The wrist strap only protects
components from ESD voltages on the body; ESD voltages on clothing can still cause damage.
Never attempt to remove the printed circuit board from the metal carrier.
Chapter 5
Removal and Replacement Procedures
OL-4503-24
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