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B
F
IELD
-R
EPLACEABLE
U
NITS
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
1
Remove the power cord from the power supply.
2
Loosen the captive screws that secure the power
supply to the chassis.
3
Grasp the power supply handle and gently slide the
power supply out of the chassis.