eHam
eHam Forums => Elmers => Topic started by: W1JPP on February 25, 2023, 03:35:14 AM
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I have an older kenwood Tm-g707a dual band transceiver. I’m the original owner. It’s been a great radio.
The dtmf mic keypad has slowly developed an issue. Over time the keys have become less responsive. In order to input a number I really have to press down on a number or press it multiple times.
It will usually eventually take the number.
Just wondering if there is an easy fix (Ie take apart and spray deoxit on contacts) or if these things just wear out over time.
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Try cleaning first.
If it doesn't respond to cleaning,
https://www.digikey.com/en/products/detail/chemtronics/CW2605/306998
The TLDR; https://www.eevblog.com/forum/repair/best-method-to-restore-conductive-keypads
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This seems to be a common problem with those rubber "conductive" pads - they lose their conductivity over time.
I've heard that removing the pad and cleaning the contact areas of both the rubber pad and the circuit board with a bit of alcohol will help.
For more ideas just search "conductive rubber pad cleaning" online...my preference is duckduckgo, but google works too.
Good luck!
-acm
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I have cut a piece of the real aluminum duct tape to the shape of the button and put on the back with the metallic side out and it works fine bizniz.
Just have to make sure there is enough room for the thickness so it won't touch anything unless it's pressed.
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just to close out this thread with my solution....
this am I took apart my mic, put some deoxit on the board contacts that the rubber keypad hits, took out the rubber keypad and wiped it down with deoxit (the side that hits the contacts) - reassembled and it works as good as new...