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I have a Logitech Z533 speaker system with a 'scratchy' volume control on left channel. Upon examination of the volume control board in the volume puck that sits on your desk, it is a 6 pin pot with single shaft. From research I did, this is called a 6 pin dual gang rotary pot.

It is similar to this Text

Can I just connect (via a soldered wire) the middle pin output of Left and Right channels together to eliminate the 'scratchy' noise when adjusting the volume? I think that would be easier than replacing it.

I tried to blow out the pot with compressed air but that had no effect.

Thanks for helping with my first question!

Stellablue
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  • Connect the middle pins to what? To each other? Are you hoping that it will still work as a volume control after this modification? You just need contact cleaner spray - not compressed air. – Transistor Sep 22 '20 at 19:52
  • Yes, connect the 2 middle pins together. Since there is only one shaft, make the outputs same by connecting them. That would eliminate the intermittent connection caused by the wiper contact no? – Stellablue Sep 22 '20 at 20:06
  • No. If you do that you'll destroy the stereo image and get the same audio on both stereo channels. If one is scratchy then you'll hear it from both speakers. – Transistor Sep 22 '20 at 20:25
  • Ok, thank you Transistor! I will order some contact cleaner and try it. – Stellablue Sep 22 '20 at 20:36
  • If a coupling capacitor is leaky and puts DC on the control then it will make a scratchy noise. Then the capacitor needs to be replaced. – Audioguru Sep 23 '20 at 00:33

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