6
M
AINTAINING
H
ARDWARE
This chapter covers the following topics:
■
Replacing a Power Module
■
Replacing a Power Supply
■
Replacing I/O Modules
■
Replacing the Fan Assembly
The procedures in this chapter should be performed by trained service personnel
only.
Replacing a Power
Module
To replace a power module, you need:
■
An antistatic wrist strap
■
A screwdriver
WARNING:
Insure that the switch is powered off before removing or installing a
power module.
Removing the AC Power
Module
To remove the power module, do the following:
1
Power off the Switch 7750.
2
Remove the power cord from both the power module and the AC power socket.
3
Loosen the retaining screw that secures the power supply on the lower right front
of the power supply.
4
Remove the power supplies approximately 2 inches (5 cm) from the chassis to
disconnect the power supply AC connectors from the AC power module.
5
Loosen and remove the 4 screws at the corners of the power module.
6
Remove the power module from the chassis.
Installing the AC Power
Module
To install the new power module, do the following:
1
Slide the replacement power module into the power module slot in the bottom
rear of the chassis.
2
Insert and tighten the 4 screws at the corners of the power module.
3
Reconnect the power supplies to the power module.
4
Tighten the retaining screw on the lower right front of the power supply.
5
Connect 2 power cords to the power module.
