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Author Topic: intermittent sound from left channel on mixer  (Read 1303 times)

tom delduca

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intermittent sound from left channel on mixer
« on: June 26, 2017, 05:16:53 pm »

Hi all, I am using a Yamaha GF16/12 mixer and I am getting intermittent static/crackle/cutouts from the left channel of my mixer (control room out -- headphone and monitors when AFL to stereo bus ) -- ONLY when tapping hard/pressing on certain areas of the front panel face.

The mixer arrived to me with crackly mute/HPF/pad etc switches, as well as intermittent sound from the aux sends. I opened it up and cleaned switches with deoxit, which resolved the problem, and cleaned/ reseated the ribbon connectors from the main board to aux outs, which solved that problem.

Now, however, I have noticed that if I tap on certain areas on the face of the mixer, the left channel will cut out or become static-y. The right channel appears fine no matter what. Usually if I leave it alone, it operates fine, but I would like to fix it if possible.

Is this a sign of a ribbon cable that is loose? Or some other problem with board, such as a cold solder joint somewhere? Any suggestions as to what to look for when I open it up again would be appreciated. How would I go about diagnosing this issue?

Any help would be appreciated, I would like to fix it if I can. I have the service manual/schematics if that helps.
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Mac Kerr

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Re: intermittent sound from left channel on mixer
« Reply #1 on: June 26, 2017, 05:23:54 pm »

Any help would be appreciated, I would like to fix it if I can. I have the service manual/schematics if that helps.

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Re: intermittent sound from left channel on mixer
« Reply #1 on: June 26, 2017, 05:23:54 pm »


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