3Com 9400 manual Audience, Safety Precautions, Power Supply Assembly Removal and Replacement

B FIELD-REPLACEABLE UNITS

This appendix contains information on how to remove and replace the CoreBuilder® 9400 Field-Replaceable Units (FRUs). The FRUs include:

■Power supply assembly

■Fan tray assembly

Only trained technical personnel should remove and install the power supply.

Audience

This appendix is intended for trained technical personnel only. Do not attempt to remove or replace a CoreBuilder 9400 power supply if you have not had the proper training from 3Com. For training information, call 1-800-NET-3COM or see the numbers for your country in Appendix D.

WARNING: Hazardous energy exists within the CoreBuilder 9400 system. Use extreme caution when you remove or replace the FRUs. Always be careful to avoid electric shock or equipment damage. See “Safety Precautions” next.

Safety Precautions

Be sure that you follow all safety precautions when you replace components in a CoreBuilder 9400 system. Hazardous energy exists inside the system chassis. To avoid electric shocks, burns, or equipment damage, read and following these warnings:

WARNING: Always unplug the power cord before you open any electronics chassis box or enclosure.

When the system is on, do not touch any connections within the chassis. Do not insert metal objects into the system.

Power Supply Assembly Removal and Replacement

The CoreBuilder 9400 system operates using a single power supply assembly. You can add a second power supply to the system for redundancy. If either power supply fails, the Fault LED lights yellow.

Removing and Replacing the Power Supply

1Remove the power cord from the power supply.

2Loosen the captive screws that secure the power supply to the chassis.

3Grasp the power supply handle and gently slide the power supply out of the chassis.