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Installation Prerequisites
Installation Prerequisites
This section provides a list of parts and tools you need to remove and replace the AC-input power
supply in the Cisco 7200 series routers. This section also includes safety and ESD-prevention
guidelines to help you avoid injury to yourself and damage to the equipment.
List of Parts and Tools
You need the following tools and parts to remove and replace the subchassis and fan tray. If you need
additional equipment, contact a service representative for ordering information.
• A new AC-input power supply
• Number 2 Phillips screwdriver
• 3/16-inch flat-blade screwdriver
• Several cable ties (if the router is mounted in an equipment rack)
Safety Guidelines
Following are safety guidelines that you should follow when working with any equipment that
connects to electrical power or telephone wiring.
Electrical Equipment Guidelines
Follow these basic guidelines when working with any electrical equipment:
• Before beginning any procedures requiring access to the chassis interior, locate the emergency
power-off switch for the room in which you are working.
• Disconnect all power and external cables before moving a chassis.
• Do not work alone when potentially hazardous conditions exist.
• Never assume that power has been disconnected from a circuit; always check.
• Do not perform any action that creates a potential hazard to people or makes the equipment
unsafe.
• Carefully examine your work area for possible hazards such as moist floors, ungrounded power
extension cables, and missing safety grounds.
Telephone Wiring Guidelines
Use the following guidelines when working with any equipment that is connected to telephone
wiring or to other network cabling:
• Never install telephone wiring during a lightning storm.
• Never install telephone jacks in wet locations unless the jack is specifically designed for wet
locations.
• Never touch uninsulated telephone wires or terminals unless the telephone line has been
disconnected at the network interface.
• Use caution when installing or modifying telephone lines.
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