Avaya VSU 7500, User Manual

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Troubleshooting 4-3
VSU-7500 User Guide
Alternate Power Supply Removal and Replacement
Referring to Figure 4-2, perform the following steps to replace the defective
power supply module:
1.
Unscrew the thumbscrew next to the hinged fan assembly on the back of the
unit and swing the fan assembly open to expose the power supply modules.
NOTE: The warning buzzer will continue to buzz as long as the fan assembly
door is opened.
2.
Locate the defective power supply module. The green LED indicator on the
defective power supply module will be OFF.
3.
Set the ON/OFF (I/O) switch of the defective power supply to OFF.
4.
Grasp the handle on the power supply and gently pull the defective module
out of its enclosure.
Figure 4-2 Alternate Power Supply Removal and Replacement
5.
Set the ON/OFF (I/O) switch on the new power supply module to OFF, then
slide the new power supply module into the enclosure and press firmly on the
front of the module to securely seat the module.
WARNING: Do not insert any object into the power supply slot, such as fingers,
tools, etc., as dangerous voltages exist on the connectors.
6.
Set the ON/OFF (I/O) switch of new power supply module to the ON
position, then close and secure the fan assembly door.