4
Maintaining Your Equipment
Replacing an AC Power Supply
Replacing a DC Power Supply
Replacing a Fan Module
Replacing Optional Ports
Replacing a Clock Module
Replacing a T1/E1 Module
Removing an E4G-200 Router from an Equipment Rack
Removing an E4G-400 Router from an Equipment Rack
Use the procedures in this section to complete the following maintenance tasks for an E4G router.
Caution
Wear hearing protection if you plan to work near multiple routers for an extended time. When
all fans are operating, the noise level for an E4G-400 router can exceed 7.2 B(A) declared
sound power or 69 decibels sound power.
Replacing an AC Power Supply
The E4G-400 routers have two bays for hot-swappable power supplies.
In a router with a redundant power configuration, you can replace one AC power supply without
powering down the router.
Before you start, have the following items on hand:
•
Thermal protective gloves.
•
An AC power cord, if you will not be re-using the cord from the removed power supply.
An AC power cord is not included with the AC power supply. You must obtain a power supply cord
that meets requirements. See
Selecting Power Supply Cords
on page 82 for more information.
When replacing a power supply unit, be sure to observe all of the safety recommendations in
Installing
Power Supply Units and Connecting Power
on page 81.
To replace the AC power supply in an E4G-400 router, follow these steps:
1 Disconnect the AC power cord from the wall outlet and from the power supply.
2 Note the orientation of the installed power supply and the location of the latching tab at the right of
the unit.
E4G Routers Hardware Installation Guide
64
