Power Supply Assemblies Removal And Replacement; Removing And Replacing The Power Supply - 3Com CoreBuilder 3500 Getting Started Manual

74 A B: F -R
PPENDIX IELD EPLACEABLE
CAUTION: If the resistance is too great, the module
connectors and backplane connectors may not be
aligned. Forcing the module forward can damage the
board and backplane connectors. If necessary, remove
and reinsert the module, ensuring that the connectors
are properly aligned. Do not seat the module by
tightening the captive screws.
Tighten the captive screws to secure the module in
6
the chassis.
Reconnect all cables to the module.
7
Figure 26 Removing and Replacing a Module
PCMCI
R
ERROR
R N S
PWR RUN SYS INS PS1 PS2 FAN
Injector/Ejector 100BASE-TX
handle
C
OMPONENTS
ETHERNET
MODEM TERMINAL
10BT
INS
TEMP CONFIG
100 BASE - TX
3C35210 1X 2X 3X 4X 5X 6X
L E T L E T L E T L E T L E T L E T
PWR
INS
ERR
Captive
module screw
Power Supply Assemblies Removal and
Replacement
The CoreBuilder 3500 system operates using a single
power supply assembly. You can add a second power
supply to the system for fault-tolerant redundancy. If
either power supply fails, the associated power supply
LED (PS1 or PS2) on the system's front panel lights
yellow.

Removing and Replacing the Power Supply

Read and follow all "Safety Precautions" earlier in this
1
appendix.
Lift the power supply latch to disconnect the power
2
cord and remove it from the system.
Loosen the captive screws that secure the power
3
supply to the chassis.
Grasp the power supply handle and gently slide the
4
power supply out of the chassis.
Gently slide the new power supply into the chassis.
5
To seat the power supply, ensure that the power
6
supply connectors and backplane connectors are
aligned. Then push the power supply inward until the
connectors engage. You feel a slight resistance as the
connectors engage.
CAUTION: If the resistance is too great, the power
supply connectors and backplane connectors may not
be aligned. Forcing the power supply inward can
damage the power supply or backplane connectors. If
necessary, remove and reinsert the power supply,
ensuring that the connectors are properly aligned.