Discussion about the Korg PolySix synthesizer

Hi,

Regarding IC26 pin 5 --> IC34 pin 5:

Yes, they should be connected to eachother.
But more importantly, do any of them have contact with pin 11 of the 8048 (IC22) ?
IC26 and IC34 are latches, controlled by pin 11 of the 8048.
The fact that IC26 and IC34 have pins 5 connected to eachother doesn't necessarily mean any of them will work, unless they in turn are connected to the 8048 pin 11.
So connection between IC22 pin 11 <--> IC26 pin 5 <--> IC34 pin 5 is what you need.

BR,
Peter



  ----- Original Message ----- 
  From: tonezone020 
  To: PolySix@yahoogroups.com 
  Sent: Tuesday, July 24, 2012 11:59 AM
  Subject: [PolySix] Re: Polysix contact strip


    
  Erm,

  Correction - that should be IC24 p2, 1, 11, 10 that is connected to IC32 p2, 1, 17, 16

  Cheers,

  Tony

  --- In PolySix@yahoogroups.com, "tonezone020" <swamp.gigs@...> wrote:
  >
  > Hi Don and Peter,
  > 
  > Your messages have been very helpful consequently I've discovered anomalies elsewhere...
  > 
  > IC26 p5 doesn't connect to IC34 p5 - should I bridge this ?
  > 
  > IC26 to IC32 connections are all fine.
  > 
  > Also I think there's a mistake in the schematics. Rather than IC34 connecting to IC32 it seems to be IC26 p2, 1, 11, 10 that is connected to IC32 p2, 1, 17, 16
  > 
  > Regards,
  > 
  > Tony
  > 
  > 
  > --- In PolySix@yahoogroups.com, "backshall1" <backshall1@> wrote:
  > >
  > > Yes, there is an error in the schematics. Pin 5 is +5v, not pin 4. Pin 4
  > > really does go to pin 12 on the 8048. I just checked a clone board and an
  > > old original KLM-367. They are the same.
  > > 
  > > Don B.
  > > 
  > > 
  > > 
  > > _____ 
  > > 
  > > From: PolySix@yahoogroups.com [mailto:PolySix@yahoogroups.com] On Behalf Of
  > > Peter Mörck
  > > Sent: Monday, July 23, 2012 8:25 PM
  > > To: PolySix@yahoogroups.com
  > > Subject: Re: [PolySix] Re: Polysix contact strip
  > > 
  > > 
  > > 
  > > 
  > > 
  > > You must be looking at the board layout drawing.
  > > The schematics are different and have no "layers". They just show how it's
  > > connected without actual physical constraints.
  > > 
  > > Anyway, I just looked and pins 1,4,10,13,14 of IC31 are tied to +5V :)
  > > 
  > > By the way,
  > > I assume there's an error in the schematics indicating pin 4 tied to pin12
  > > of the 8048, as it's also tied to +5V.
  > > Either that's pin 5 instead, or vice versa.
  > > 
  > > IC31 is just a quad AND gate acting as a buffer. Each of the AND gates has
  > > one of its inputs tied to +5V so whatever appeard on the other input will
  > > also appear on the output of that gate.
  > > 
  > > The traces under IC31 are usually attacked by the battery acid though and it
  > > is good if you do continuity testing around that area.
  > > 
  > > BR,
  > > Peter
  > > 
  > > ----- Original Message ----- 
  > > From: tonezone020 
  > > To: PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> 
  > > Sent: Tuesday, July 24, 2012 1:45 AM
  > > Subject: [PolySix] Re: Polysix contact strip
  > > 
  > > Hi,
  > > 
  > > Looking at the schematics it's hard to tell - it doesn't seem like there is
  > > one for the underside of the board ...
  > > 
  > > Regards,
  > > 
  > > Tony
  > > 
  > > --- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> , Peter
  > > Mörck <peterm@> wrote:
  > > >
  > > > Just compare with the schematics?
  > > > 
  > > > BR,
  > > > Peter
  > > > 
  > > > ----- Original Message ----- 
  > > > From: tonezone020 
  > > > To: PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> 
  > > > Sent: Tuesday, July 24, 2012 12:52 AM
  > > > Subject: [PolySix] Re: Polysix contact strip
  > > > 
  > > > 
  > > > 
  > > > Hi,
  > > > 
  > > > Thanks for your message. 
  > > > 
  > > > I managed to sort the strips out - they had stretched, but with a bit of
  > > coaxing the keys are now working.
  > > > 
  > > > Been slowly trying to fix the battery leak problem with a tiny bit of
  > > success and Old Crow's advice from his site. 
  > > > 
  > > > I discovered pin numbers 13 and 14 on IC31 are connected. Do you know if
  > > this should be so? There seems to be a copper trace on the underneath
  > > circuitry. It also appears to be the same for IC30...
  > > > 
  > > > Thanks,
  > > > 
  > > > Tony
  > > > 
  > > > --- In PolySix@yahoogroups.com <mailto:PolySix%40yahoogroups.com> ,
  > > bastebraak <bastebraak@> wrote:
  > > > >
  > > > > 
  > > > > 
  > > > > Is the old one damaged or just not working well. I fixed the contacts on
  > > my polysix with a paste i ordered online.
  > > > > 
  > > > > 
  > > > > Verzonden vanaf Samsung Mobiletonezone020 <swamp.gigs@> schreef:
  > > > > Hi All,
  > > > > 
  > > > > Does anyone know where I can get a couple of 6 bubble contact strips or
  > > alternatives for my synth, preferably in the Uk ?
  > > > > 
  > > > > Many thanks in advance,
  > > > > 
  > > > > Tony
  > > > > 
  > > > > 
  > > > > 
  > > > > ------------------------------------
  > > > > 
  > > > > Yahoo! Groups Links
  > > > > 
  > > > > 
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  >



  

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