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2 Installing Cisco AC and DC Power Supplies in Cisco 2500 Series Routers
Required Tools and Equipment
Warning Read the installation instructions before you connect the system to its power source. (To
see translated versions of this warning, refer to the Regulatory Compliance and Safety Information
document that accompanied the router.)
Required Tools and Equipment
You will need the following items:
• One screw
• Cisco 2500 series router
• AC or DC power supply
• Medium-size flat-blade screwdriver
• ESD-preventive wrist strap
• Antistatic bag
Removing the Cover
You must remove the chassis cover to access the internal power supply. When opening the chassis,
refer to Parts A and B in Figure 1.
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 Regulatory
Compliance and Safety Information document that accompanied the router.)
Warning Before working on equipment that is connected to power lines, remove jewelry (including
rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and
can cause serious burns or weld the metal object to the terminals. (To see translated versions of this
warning, refer to the Regulatory Compliance and Safety Information document that accompanied the
router.)
Warning Before working on a chassis or working near power supplies, unplug the power cord on
AC units; disconnect the power at the circuit breaker on DC units. (To see translated versions of this
warning, refer to the Regulatory Compliance and Safety Information document that accompanied the
router.)
Warning Do not work on the system or connect or disconnect cables during periods of lightning
activity. (To see translated versions of this warning, refer to the Regulatory Compliance and Safety
Information document that accompanied the router.)
Take the following steps to remove the chassis cover:
Step 1 Power OFF the router.
Step 2 Attach your ESD-preventive wrist strap.
Step 3 Disconnect all cables from the rear panel of the router.