6
MAINTAINING HARDWARE
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 To remove the power module, do the following:
Module
1Power off the Switch 7750.
2Remove the power cord from both the power module and the AC power socket.
3Loosen the retaining screw that secures the power supply on the lower right front of the power supply.
4Remove the power supplies approximately 2 inches (5 cm) from the chassis to disconnect the power supply AC connectors from the AC power module.
5Loosen and remove the 4 screws at the corners of the power module.
6Remove the power module from the chassis.
Installing the AC Power To install the new power module, do the following:
Module
1Slide the replacement power module into the power module slot in the bottom rear of the chassis.
2Insert and tighten the 4 screws at the corners of the power module.
3Reconnect the power supplies to the power module.
4Tighten the retaining screw on the lower right front of the power supply.
5Connect 2 power cords to the power module.
