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Vintage Synth Repair

Index last updated: 2026-04-28 23:41 UTC

Message

Re: Sequential Circuit Pro One UPD8021 chip

2013-09-12 by Nicolas

Hi,

Thank you for replying.
I think I found the problem. There was some key contacts that were touching the casing and it was triggering the arpegiator for some reason.
I fixed that and now the Pro One is back to normal again.

Nicolas

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