Yamaha DX7 Unwanted Explosion Distortion?????

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Yamaha DX7 Unwanted Explosion Distortion?????

Post by dxcultmaster » Sun Sep 20, 2020 1:12 am

In summary, I can't hold more than 3 keys down at a time. If I hold 4 or more keys down on any of the voice presets, the note that plays sounds like an explosion that's supper distorted. When I first got it, this problem only existed for some of the voice presets, and I only got distortion with 5 or more keys, but it has since worsened. I haven't done anything to try and fix it yet, just gathering information so far.

Any idea what could be causing this?

Here's a link to a video:


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Re: Yamaha DX7 Unwanted Explosion Distortion?????

Post by madtheory » Wed Sep 23, 2020 9:11 am

Seeing as it got gradually worse over time, check capacitors in the audio or summing path. I don't know for sure. You will have to check in the service manual.

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