To change an intercom module in the assembly:
1. Turn the power OFF.
2. Remove the screws that hold the module to be replaced.
3. Remove the Input and Output modules at locations 3 and 4 from the bottom of the
assembly to gain access to the Main PC Board (see Removing and Replacing
Modules on page 15).
4. Check that the intercom switch settings are appropriate for the new module to be
inserted.
5. Connect the multi-conductor cable to the respective intercom module.
5. Set the module in place and fasten the mounting screws. Replace the Input and
Output modules.
6. Turn the power ON.
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