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Help programming TK-480 with a KMC-41

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Jul 20, 2020
I'm looking for a little direction on solving two long standing problems.

I have a a TK-480 which has the C key programed to turn off and on "key lock". I've used a different TK-480 which automatically turned on key lock to the main channel when the radio is turned on. I've tried speaking with the company in charge of setting up the radios. Everyone agrees it is a programmable feature but no one seems able to turn it on.
Could someone tell me the name of this feature and how it can be enabled?

The second problem is with several KMC-41 mic. I'm trying to use the aux output to a ear piece. The output will work for a week to several months then stop working. The mic speaker is muted so it appears to know a cable is plugged in but nothing is coming out if the aux speaker. This has happened on several mics and they all fail within a month. Can these mics be fixed? How do I stop them from breaking if I buy a new mic?
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