Replacing A Power Supply; Maintaining Hardware - 3Com 3C17500 Installation Manual

5
Replacing a Power
Supply
M
AINTAINING
This chapter covers the following topics:

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.
To replace a power supply, you need:
An antistatic wrist strap
■
A screwdriver
■
WARNING: When installing or replacing the power supply when the power is on,
do not touch any naked wire, terminal, or any other part of the product labeled
Dangerous Voltage. Always wear the antistatic wrist strap when replacing the
supply.
Use the following steps to replace a power supply:
1 Turn off power to the power supply you are replacing.
2 Pull up on the retention clip that holds the power cord connector and unplug the
power cord.
3 Loosen the captive screws on both sides of the power supply.
4 Support the power supply with one hand and gently pull the handle with the
other hand until it slides out of the slot.
5 If you are not going to install another power supply in this slot, install a blanking
plate on the chassis for dust-proofing and heat dissipation.
6 Remove the new power supply from the package and verify that the correct input
mode is selected.
7 Support the power supply, right side up, in one hand and hold the handle with
another hand. Align the supply with the guides in the chassis and slide the power
supply into the slot.
CAUTION: As you are inserting the power supply, if the pin terminal springs up,
the pin cannot be seated into the hole and the system will sound an alarm. If the
power supply has not been inserted properly, you should slide it out and insert it
again to avoid breaking or cracking the power terminals.
8 Fasten the captive screws.
H
ARDWARE