Discussion about the Korg PolySix synthesizer

if you trigger the lfo to frequency oscillation and adjust the lfo frequency to maximum, you will get also very heavy distorted sounds. and that sounds like the IC30/31 problem. but i discovered also other issues that effects the lfo. the cables from the board to the top the control board are very short. sometimes if i open my case they lost the contact and i get strange effects too
  ----- Original Message ----- 
  From: toorglick 
  To: PolySix@yahoogroups.com 
  Sent: Monday, July 19, 2004 5:58 PM
  Subject: [PolySix] Re: Son of a b****


  Yeah, it sounds more like the or *a* LFO gone haywire, but at a 
  frequency where it sounds more like distortion.  

  The only other conclusion I can come to is that I fried IC30 when 
  installing the new chip.  The electronics store I go to didn't have 
  any 14 pin IC sockets.  Maybe I'll stop by Radio Shack to see if they 
  do.  That and the initial I repairs I made weren't robust enough or 
  didn't catch everything breaking down.

  Fortunately I have five more 74LS08's left!

  One thing I noticed while checking traces and other connections on 
  the board is that not all of the connections read the same value, 
  though they all fall within certain value groups, as it were.  Would 
  anyone mind telling me what I should be seeing?

  Also, can anyone tell me what R17 is?  On the schem it's called "RKC 
  1/8 88 10k".  What does it do?  Can I get a new one readily?  

  The reason I ask is because I'm thinking about starting from scratch; 
  removing the jumps I made before; replacing ICs 30 & 31 and possibly 
  R17.  Since I've had my Polysix and have seen pictures of others' 
  KLM367s it looks as though mine was/is in pretty rough shape.  A lot 
  of the solder points above the battery area are dull, and some have 
  visibly corroded.  I've checked them all, include a lot of what-are-
  they-called? vias? (the areas where the path switches from the bottom 
  to the top and vice-versa) and all check out, but some look "bad."

  Anyway, that's my story.  I really prefer to be playing instead of 
  fixing, but nothing sounds like a *real* Polysix and thus I'm 
  addicted.  Any input is appreciated.


  --- In PolySix@yahoogroups.com, "BrainSlayer" <brainslayer@c...> 
  wrote:
  > sounds like a lfo problem
  >   ----- Original Message ----- 
  >   From: reidar@j... 
  >   To: PolySix@yahoogroups.com 
  >   Sent: Monday, July 19, 2004 1:47 AM
  >   Subject: Re: [PolySix] Son of a b****
  > 
  > 
  > 
  >   That sounds like what my P6 is doing too - like the mod wheel is 
  fully on.
  >   Everything is 'bubbling'.  I have found that the PWM width 
  control seems to
  >   have the best effect on it, but also, if I leave the P6 switched 
  on for an
  >   hour or so, it goes away.  I'm not an electronics-type, so I 
  really don't
  >   have a clue, but the fact that it goes away (usually) after a 
  long warm-up
  >   might mean something to some of you?
  > 
  >   Reidar
  > 




  PolySix "Digiest" Page: http://www.acc.umu.se/~amber/Poly6 


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