Kenwood TM-G707 Ham Radio Troubleshoot and Repair Switching Fault

In this video I go over the general features of the Kenwood TM-G707 transceiver, diagnose and repair a VHF TX and RX fault to components level. This is an electronics repair video. Please feel free to leave comments and suggestions as we’d love to hear from you.

[@jadwigagrabianska-xg7re]

Excellent repair,very helpful

[@Gw0wvl]

Nice work John 👍

[@aggiebill9063]

Enjoyed your video. Thanks. My 707 is stuck on powerup. How do I do a factory reset? I pressed the button on the rear of the front panel but nothing happened.

[@rscelectrical7091]

Great video John 👍

[@M0XFXUK]

Glad you enjoyed it, best reagrds

[@boxingday11]

Thanks John, very interesting.
You and Peter ,of TRX are extremely clever chap's.👍🏻

[@M0XFXUK]

I am glad that you found the video interesting, I also like Paters video's he does a really great job. Thank you for the comment.

[@g1fsh]

I do like these radios they have a lovely big clear display and they do work really well. Another great job John boy well done as always.

[@M0XFXUK]

Thanks Gary, Yeah they are really nice rigs I may just have get myself one of these.

[@romeo-sierra]

Great video. it's fun to watch these radio repairs!

[@M0XFXUK]

Thank you for your comment Romeo, I'm glad that you enjoy the repair videos.

[@GeorgeEI7KO]

Nice repair John. Keep up the great work mate.

[@M0XFXUK]

Thanks George

[@toolmanchris]

Another informative video John keep up the good work 👍

[@M0XFXUK]

Thanks Chris

[@clivebannister7016]

I have that radio and recently the audio output has dropped significantly! Any ideas please

[@raybyrne7278]

Nice fix John ( PS you do know murphy's rule about current measurement something else is going to blow to protect the fuse )

[@M0XFXUK]

Hi Ray, Yes that's it you hit the nail on the head. Yes and it's normally somthing expensive 🤣😂🤣

[@markgilbert9930]

Nice work.

[@M0XFXUK]

Thanks Mark, I happy that you enjoyed the video.

[@DJIGeordie]

Hi bud you would not know how to turn down the mic gain it says to go to menu and scroll to menu 27 but mine stops at 26

[@M0XFXUK]

Hi Mate, sorry for the late reply. To be honest I don't have the radio to hand but I will ask for you.

[@tommasolagana9979]

Can you tell me microphone compatibile used? Qyt model? Thank you!!

[@M0XFXUK]

Sorry for the late replay, I can't remember what model was of mic and I don't have the radio to hand. however; I have messaged to owner so hopefully you can get your answer. Just as a note, I do seem to remember the mic worked very well.

[@M0XFXUK]

(I asked the question) Answer: Its the QYT mic but same as the Kenwood KMC42 use on loads of radios but the DTMF only works on the A version not the E version radio.

[@w2msa]

I have a G707 with same exact problem and I can’t get anyone to work on it. What are the chances it might be the same bad component?
Thanks for the video.
de W2MSA

[@M0XFXUK]

Hi there, I am not sure if this is a common fault, however if the unit has the same issue I'd say it's most likely the same switching transistor. I would be happy to sort it out for you if you were in the UK. Hope this is of help.

[@w2msa]

I looked a little deeper and it turns out it’s pulling 5A as soon as it’s plugged into the power supply regardless if the radio is turned on, off or what band it’s on.
Thanks for the video and your response.
73, de W2MSA

[@M0XFXUK]

@@w2msa Hi Noel, as I recall the radio in the video only pulled high current on VHF and was OK on UHF. A simple thing you can do is work out where all the energy is going i.e. what is getting hot. IR cameras are very good for this.

[@w2msa]

Thanks for the advice. I’ll look into it a little deeper and see if I can identify what’s getting hot.