Stuck Buttons on Kenwood TM-721A

We had a couple days over 90 degrees. I tried using my Kenwood TM-721A today, and the buttons got stuck. I figured the reason was heat related. I took the front panel off and here’s what I saw.

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Sure enough, the orangey foam which holds the buttons has begun to disintegrate, and that has left a sticky mess on the buttons. I removed the rest of the foam and then cleaned the remaining mess with rubbing alcohol using cotton swabs. Here’s the end result.

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After putting it back together again, now it’s as good as new – at least for 1988! The only thing I can’t do is remove the front panel ever again, because then I’ll have a bunch of buttons flying everywhere. But that’s not a big deal.

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2 thoughts on “Stuck Buttons on Kenwood TM-721A

  1. Elliott Olson

    Why can’t you take the front panel off if you keep it face-down? The buttons aren’t spring-loaded.

  2. Brian KJ6VZV Post author

    Yes, you’re right if I keep it face down. Just one more thing I’d have to remember if I do take the front panel off again…

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