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Installing the Control Unit
.
Step 2b: Replacing the Feature Module
It may become necessary at some point to replace the feature module
because of upgrades or malfunctions.
CAUTION:
Make sure that you have a backup of the system programming
before replacing the feature module. (When the feature module is
replaced, system programming is lost.) See Chapter 7 for
information on the backup procedure.
Follow this procedure to replace the feature module in a fully installed system:
a. Turn off the system (see “Powering Down the System” later in this
chapter). Make sure the switch on the power supply is turned off.
b. Remove the processor from the carrier:
i.
Press upon the tab on the bottom-rear of the module.
ii. Pull the bottom of the module away from the carrier.
iii. Lift upward to disengage the module from the rod on the top of
the carrier.
c. Put the processor on a flat surface.
d. Grasp both metal rings on the outside of the feature module and pull
straight up.
CAUTION:
Grasping onfy one of the rings may cause damage to
components on the processor circuit board or feature module.
Installing the Processor
2-45