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Installing the Control Unit
d. Push firmly until the processor snaps into place.
The processor should be securely attached to the carrier and locked in
place by the locking tab on the bottom-rear of the processor.
CAUTION:
To avoid damage, do not force the module. If the module
does not insert easily, press the bottom-rear locking tab,
remove the module, and inspect the module and carrier for
damage or obstruction.
If there is no damage and no obstruction, reinsert the module.
A damaged carrier or module must be replaced.
See Figure 2-14 for the botlom-rear locking tab. This tab is
used on ail modules.
Step 4a: Installing the Auxiliary Power Unit
The Control Unit Diagram on the back of System Form 1, System Planning,
indicates whether an auxiliary power unit is required for the carrier that you
are installing. (see Figure 2-15).
NOTE:
■ Use the 9024 auxiliary power unit for new installations.
You can continue to use a previously installed 335A auxiliary
power unit provided no new telephones or modules are added to
the carrier.
■ To replace an auxiliary power unit, skip to the next section,
“Step 4b: Replacing an Auxiliary Power Unit.”
2-48
Installing the Processor