Cisco 3725 - Manual (Page 8)

8
Installing AC Power Supplies in Cisco 3725 Routers
78-13820-01
Replacing the Cisco 3725 Power Supply
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 3725 Power Supply
The power supply and cabling for the Cisco 3725 router is contained inside the chassis. To replace the
power supply, complete these procedures:
• Removing the Router Cover, page 8
• Removing the Cisco 3725 Power Supply, page 9
• Installing the Cisco 3725 Power Supply, page 15
• Replacing the Router Cover, page 16
Removing the Router Cover
To gain access to the Cisco 3725 power supply, you must first remove the chassis cover:
Step 1 Turn off power to the router.
Step 2 Remove all network interface cables from the rear panel.
Step 3 Remove the power cord.
Warning When installing the unit, always make the ground connection first and disconnect it last. To see
translations of the warnings that appear in this publication, refer to the Regulatory Compliance
and Safety Information document that accompanied this device.
Step 4 Place the router so the rear panel is closest to you. Remove the six screws located on top of the cover.
Set the screws aside in a safe place.
Step 5 Lift the front edge of the cover. (See number 1 in Figure 3 .)
Step 6 Slide the cover toward the right until the metal tabs on the rear edge separate from the chassis bottom.
(See number 2 in
Figure 3 .)