Archive of the former Yahoo!Groups mailing list: Discussion about the Korg PolySix synthesizer

previous by date index next by date
previous in topic topic list next in topic

Subject: Re: [PolySix] Re: Help! Repairing a Polysix with burst battery (sound demo + photos!)

From: Chris Logue Smart <smarteeism@yahoo.co.uk>
Date: 2013-08-07

Mate, that sounds wicked! Proper Residents style! Obviously you probably don't want it to sound like that all the time......

Good luck on here. Someone usually can help. I know nothing - although its usually the voice assigner thats gone on these - my P6 is still "in the shop". My P61 is in the same state too, was thinking of replacing the batt myself but think ill just send it to an expert now reading about your troubles. Again, good luck

Chris

Sent from my iBrain

On Aug 7, 2013, at 10:02 AM, "traxus12" <ocguitar@gmail.com> wrote:

> Sorry, some of my formatting didn't make it through to the final post. I meant to include these.
>
> sound demo:
> https://soundcloud.com/ocguitar/korg-polysix-death-sounds
>
> Bank D and Program 4 constantly illuminated:
> http://imgur.com/TFEPUPB
>
> Thank you! Any advice would be appreciated.
> -Steve
>
> --- In PolySix@yahoogroups.com, "traxus12" <ocguitar@...> wrote:
> >
> > Hello! I picked up a Korg Polysix recently and I've been trying to bring
> > it back to life. Nothing I've done has changed anything yet so I'm at a
> > bit of an impasse and I'm hoping someone out there might be able to help
> > me narrow down what I should do next. I know how to use a soldering iron
> > but I'm a complete beginner at repairing circuit board traces.
> >
> > Let me give you the symptoms.
> >
> > 1. It sounds like it's gone absolutely mental with constant oscillation
> > and other insanity going on from the moment I power it up.
> > 2. The Bank D and Program 4 buttons are constantly illuminated after
> > powering up.
> >
> > After cleaning up most of the corrosion I could find around the battery,
> > it really didn't look as bad as I thought it might so I went ahead and
> > just installed a Lithium battery holder (using Old Crow's guide) and
> > tried powering up again. Nothing changed.
> >
> > After that, I went back in and removed the IC31 chip (74LS08) and tested
> > all the traces in the area with a multimeter. Every trace I tested gave
> > me a happy little beep, even the uglier looking ones that were near the
> > old battery, so I went ahead and soldered in a new socket and 74LS08
> > chip at IC31. Powered up. Nothing changed.
> >
> > Now, I'm not sure what to do. Did I miss a trace? Should I put jumper
> > wires on the ugly looking traces even if my multimeter says they're
> > conducting just fine? Should I replace the other ICs that were near the
> > battery like IC30 even if they look fine?
> >
> > I recorded a sound demo. For the first 40 seconds I don't touch a thing,
> > then I start to experiment:
> >
> >
> > Bank D and Program 4 constantly illuminated:
> >
> >
> > First sight:
> > <http://imgur.com/Wv173WQ>
> >
> > After initial cleanup:
> > <http://imgur.com/M8POlkz>
> >
> > Installed battery:
> > <http://imgur.com/Pj3kDFT>
> >
> > Replaced IC31:
> > <http://imgur.com/Nab9GYz>
> >
> >
> >
> >
> > [Non-text portions of this message have been removed]
> >
>
>


[Non-text portions of this message have been removed]