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Installing Power Supplies in Cisco 3631 Routers
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Replacing the Cisco 3631 Power Supply
Accessing the Power Supply
To access power supplies on the Cisco 3631 router, remove the router cover as described in the “Removing
the Router Cover” section on page 8.
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 translations of the warnings that
appear in this publication, refer to the Regulatory Compliance and Safety Information document
that accompanied this device.
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 power supply even 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 translations of the warnings that
appear in this publication, refer to the Regulatory Compliance and Safety Information document
that accompanied this device.
Warning
Do not work on the system or connect or disconnect cables during periods of lightning activity. To
see translations of the warnings that appear in this publication, refer to the Regulatory
Compliance and Safety Information document that accompanied this device.
Warning
Before opening the chassis, disconnect the telephone-network cables to avoid contact with
telephone-network voltages. To see translations of the warnings that appear in this publication,
refer to the Regulatory Compliance and Safety Information document that accompanied this
device.
Warning
Network hazardous voltages are present in the BRI cable. If you detach the BRI cable, detach the
end away from the router first to avoid possible electric shock. Network hazardous voltages also
are present on the system card in the area of the BRI port (RJ-45 connector), regardless of when
power is turned off. To see translations of the warnings that appear in this publication, refer to the
Regulatory Compliance and Safety Information document that accompanied this device.
Replacing the Cisco 3631 Power Supply
The power supply and cabling for the Cisco 3631 router is contained inside the chassis. To replace the
power supply, complete these procedures:
• Removing the Router Cover, page 8
• Removing the Cisco 3631 Power Supply, page 9
• Installing the Cisco 3631 Power Supply, page 14
• Replacing the Router Cover, page 14