Cisco Systems 2500 User Manual

Doc. No.

78-4144-01

Installing Cisco AC and DC Power Supplies in
Cisco 2500 Series Routers

Product Numbers: PWR-2500-AC=, PWR-2500-DC=

This document describes how to replace the AC or DC power supply in Cisco 2500 series routers.
The AC and DC power supplies are spare parts items. The replacement of the po wer supply requires
removing the existing power supply and installing the replacement power supply. This procedure
does not apply to the Cisco 2517, 2518, or 2519 versions of the Cisco 2500 series routers.

This document includes the following sections:

• Required Tools and Equipment, page 2

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• Removing the Cover, page 2

• Removing AC and DC Power Supplies, page 3

• Installing AC and DC Power Supplies, page 5

• Replacing the Cover, page 6

• Obtaining Service and Support, page 11

• Cisco Connection Online, page 11

Warning This waning symbol means danger. You are in a situation that could cause bodily injury.

Before you work on any equipment, you must be aware of the hazards involved with the electrical
circuitry and familiar with standard practices for preventing accidents. (To see translated versions of
this warning, refer to the Regulatory Compliance and Safety Information document that
accompanied the router.)

Warning Only trained and qualified personnel should be allowed to install or replace this

equipment. (To see translated versions of this warning, refer to the Regulatory Compliance and
Safety Information document that accompanied the router.)

1

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. (T o see translated v ersions of this warning, refer to theRegulatory
Compliance and Safety Information document that accompanied the router.)

Warning Before working on equipment that is connected to po wer 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 theRegulatory Compliance and Safety Informationdocument 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 break er on DC units. (To see translated versions of this
warning, refer to theRegulatory Compliance and Safety Informationdocument 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.

2 Installing Cisco AC and DC Power Supplies in Cisco 2500 Series Routers

Removing AC and DC Power Supplies

Warning Do not touch the power supply when the power cord is connected. For systems with a

power switch, line voltages are present within the po wer supply ev en when the power switch is OFF
and the power cord is connected. For systems without a power switch, line voltages are present
within the power supply when the power cord is connected. (To see translated versions of this
warning, refer to theRegulatory Compliance and Safety Information document that accompanied the
router.)

Step 4 Turn the unit upside do wn so that the top of the chassis is resting on a flat surface, and the

front of the chassis is facing toward you. (See Figure 1, Part A.)

Step 5 Remove the single screw located on the bottom of the chassis (on the side closest to you).

Note that the chassis is comprised of two sections: top and bottom.

Step 6 If required, insert a medium-size flat-blade screwdriver into the slots shown in Figure 1,

Part A, and rotate the blade so that the top and bottom sections separate slightly.

Step 7 Holding the chassis with both hands, position it as shown in Figure 1, Part B.
Step 8 Pull the top section away from the bottom section. (See Figure 1, Part B.) The fit is very

snug, so it may be necessary to pry the chassis sections apart at one end and then the other
until they separate.

Figure 1 Chassis Cover Removal

A

Slot

B

Flat-blade screwdriver

Screw Slot

Removing AC and DC Power Supplies

This section describes how to remove an AC or DC power supply. Although an AC power supply is
shown in the illustrations that follow , the procedure is the same for removing both A C and DC power
supplies.

Top section

Bottom section

Left end

toward you

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H3557

FrontRear

Take the following steps to remove a power supply:

Step 1 Remove the screw located between the power switch and power connector.

(See Figure 2.) This screw secures the power supply to the chassis.

Installing Cisco AC and DC Power Supplies in Cisco 2500 Series Routers 3

Removing AC and DC Power Supplies

Figure 2 Removing the Screw

1

0

Screw

Input: 100-240VAC
Freq: 50/60 Hz
Current: 1.2-0.6A
Watts: 40W

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Step 2

Disconnect the power connector from the system board. (See Figure 3.) Grasp the sides
of the power connector and pull upward while rocking the connector side to side.

Caution Do not pull on the connector wires.

Figure 3 Disconnecting the Power Connector

Fan

AC power supply

Power connector

Fan connector

Step 3

Push the loosened power supply backward and lift it out of the chassis. (See Figure 4.)

4 Installing Cisco AC and DC Power Supplies in Cisco 2500 Series Routers

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