Re: [chromapolaris] Digest Number 779
2017-06-26 by John Leimseider
I have many of the type 2 slide pots for the polaris. They need a little modding to fit the earlier panel boards but they last forever. They were used on the later panel boards, I assume because of the high rate of failure of the first type.
John Leimseider
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6 MessagesDigest #7791aRe: Changing to 240v by synthparts2aFaulty Envelope Depth by conorstrachan2bRe: Faulty Envelope Depth by "Paul D. DeRocco" pderocco02cRe: Faulty Envelope Depth by conorstrachan2dRe: Faulty Envelope Depth by wjmwpg2eRe: Faulty Envelope Depth by "Paul D. DeRocco" pderocco0MessagesSat Jun 24, 2017 9:22 pm (PDT) . Posted by: synthpartsSun Jun 25, 2017 2:42 pm (PDT) . Posted by: conorstrachanI seem to have an issue with the envelope depth slider. It is not responsive. The only one on the keyboard that is. However it is working through the editor in midi quest so it works so this seems like a mechanical problem or something on the panel board(it hasn't new panels). Does this sound like it needs a new potentiometer?
Thanks
ConorSun Jun 25, 2017 3:46 pm (PDT) . Posted by: "Paul D. DeRocco" pderocco0> From: conorstrachan@yahoo.com
>
> I seem to have an issue with the envelope depth slider. It is
> not responsive. The only one on the keyboard that is. However
> it is working through the editor in midi quest so it works so
> this seems like a mechanical problem or something on the
> panel board(it hasn't new panels). Does this sound like it
> needs a new potentiometer?
Most likely the wiper or elements are dirty, or the wiper contacts are bent. If you remove the slider from the board, you can pry back the tabs that hold it together, then clean the inside with alcohol and a Q-tip. If it appears the wiper contacts are bent, you you should be able to bend them back with sharp tweezers if you're very careful. If the contacts are broken, then you're SOL and will have to find a new slider. I've repaired quite a few sliders this way.
--
Ciao, Paul D. DeRocco
Paul mailto:pderocco@ix.netcom.com
Sun Jun 25, 2017 4:04 pm (PDT) . Posted by: conorstrachanThanks Paul
It got the board off and it appears that the slider does not have very much resistance compared to the rest. I guess as it's unresponsive it must be disconnected on its contact that's why it feels loose on the track. Would bending the pins sort this out? Might have to be looking at finding a new slider