Discussion about the Korg PolySix synthesizer

I found a faulty trace that ran from underneath the battery, right
above the C40 legend, to just next to IC34, right of where 'KLM-367A1'
is printed. it seemed fine going from the first point to the 7th pin
on CN03, but couldnt get as far as the 2nd point. Anyway, I repaired
this and now Resonance doesn't work properly, if the knob is moved
upwards the sound goes completely. Very strange.

Note the readings I was getting for pin 7 were probably not accurate
in my last post, they are over a wider range. They don't seem to have
changed now, but as I say Resonance isn't working properly.

To Richard Kilpatrick: I read your thread and it sounds like it's a
battery leakage. The blue 3.6v is almost certainly the NiCad Varta
battery my model also had, but mine had leaked long before I bought
it, and so I was sold it for just £30. I would be sure to get an
accurate diagnosis before you sell it on ebay however, I may be wrong.
But it does sound like there's a few too many things going wrong there.

Rich



--- In PolySix@yahoogroups.com, Richard Kilpatrick <richard@...> wrote:
>
> 
> On 31 Jul 2006, at 22:12, rignellio wrote:
> 
> > Hi Roman,
> >
> > I read through the the Sputniik/Aero thread and he looks like he's a
> > bit further on than me!
> >
> > I found one really short trace which was broken and fixed that, I
> > don't know if there is a map of where the traces go because it's
> > difficult when they are under IC's etc. Anyway I've been thorough and
> > I can't see any problems with them. However I am prepared to be proved
> > wrong.
> >
> > I didn't give a complete analysis of everything that's wrong with my
> > machine:
> >
> > - The octave is only switchable between 16' and 8', 4' sounds the same
> > as 16'
> >
> > - PW functions exactly the same as PWM
> >
> > - The Sub Osc will take the Polysix out of Manual mode when switching
> > to -1, but you can just press Manual again. -2 does the same but
> > Manual won't work with the switch in that position.
> >
> > - The VCA Attenuator isn't working at all
> >
> > I tested the pins on CN03 and I get these results:
> >
> > pin 1 varies between -5v and +4v depending on where the Effects
> > Speed/Intensity knob is
> > pins 2,3,4 are all reading 0.1v constantly
> > pins 5,6 are constant around -4-5v
> > pin 7 changes from around -5v to +5v depending on where the Resonance
> > knob is.
> 
> Whoa! Exactly what mine is doing. Freaky.
> 
> Richard
> 
> -- 
> Tasty Other - Because Far Too Much in Life Makes Sense
> Music for download - coming soon (RIP MP3.com)
> G.A.S. http://www.dmc12.demon.co.uk/music/
> Platform: PowerMac G5 2.0GHz Dual, 20" LCD, Logic, Hammerfall.
>