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 Forum index » DIY Hardware and Software » The Repair Shop
Roland MC-09 Knobs stuck?
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Heady9



Joined: Apr 24, 2014
Posts: 2
Location: Murfreesboro, TN

PostPosted: Thu Apr 24, 2014 3:17 pm    Post subject: Roland MC-09 Knobs stuck? Reply with quote  Mark this post and the followings unread

So, here's an interesting problem, one that I imagine would come up in other places that use similar hardware.

I'm trying to remove the knobs for my roommates MC-09 so that I can replace a slider, but unfortunately, the knobs seem to be fused to the pot shafts. Both the knobs and shafts are plastic, and the pots themselves are mounted to the circuit board, which means most uses of force are out of the question.

I'd thought about using a solvent or lubricant to loosen things up, but I'm worried about discoloring the plastic/damaging the electronics further. I did try a little Ratshack contact cleaner, but that didn't do much. all attempts to pry things loose have just ended up in damage to the faceplate (Light as I try to be)

TL/DR: Plastic knobs fused to Plastic Pot shafts, wat do?

Any suggestions/advice?
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Blue Hell
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Joined: Apr 03, 2004
Posts: 20626
Location: The Netherlands, Enschede
Audio files: 150
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PostPosted: Thu Apr 24, 2014 4:58 pm    Post subject: Reply with quote  Mark this post and the followings unread

welcome Heady9

Some knobs have a lid/cap that you can pop off to reveal a screw, could that be the case here?

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Heady9



Joined: Apr 24, 2014
Posts: 2
Location: Murfreesboro, TN

PostPosted: Fri Apr 25, 2014 12:30 am    Post subject: Reply with quote  Mark this post and the followings unread

Thanks for the welcome ^^

No Caps as far as I can see. One piece molded plastic. I can tell that the pot shafts are plastic because one snapped before I even got it, and another was replaced by a different knob. The remaining ones are just stuck fast.

Synth in question: http://www.vintagesynth.com/roland/mc09.php
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