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3
Disable the base radio associated with the power amplifier module being replaced, so that the system does not
attribute the loss of channel to a failure.
a. Connect to the device modules Ethernet service port using Configuration/Service Software (CSS). See
Connecting Through an Ethernet Port Link, page
b. Select Service → Test Measurement Screen from the menu.
c. Click Change to Service Mode.
Step result: The base radio is disabled.
4
It is not necessary to turn off the power supply for the power amplifier module you are replacing, as
the power amplifier modules are designed to be swapped out with the power on.
If you choose to turn off the power, set the rocker switch on the front of the associated power supply to the
Off (0) position.
5
Remove the fan assembly to gain access to the power amplifier module. See
page 9-10
for instructions on removing the fan assembly.
The power amplifier module is designed to be swapped out without shutting the power off. However,
you should minimize the amount of time that the fan is removed, so the circuitry that remains powered
on does not overheat and shut down.
It is recommended that you let the power amplifier module cool before performing the following
step, which exposes surfaces of the module that can be extremely hot.
6
Using a T20 bit, loosen the two captive screws on the front of the power amplifier module so that they
disengage from the chassis.
6871022P86-A - November 2012
9.6.1 How To Replace a Power Amplifier
4-11.
9.3 Replacing the Fan Assembly,
4.4.4
9-19
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Table of Contents
Troubleshooting
