Discussion about the Korg PolySix synthesizer

oops -- meant to post this too:
http://www.oldcrows.net/~oldcrow/synth/korg/polysix/crowlm367/klm367a_img.gif


On Tue, Jul 24, 2012 at 1:43 PM, Jed Jorgensen <jed.jorgensen@gmail.com>wrote:

> Crow's schematic can be a big help:
>
> http://www.oldcrows.net/~oldcrow/synth/korg/polysix/crowlm367/klm367a_eagle_schem.gif
>
> I also track things using his 'see-through' board layout (from which the
> clones were derived). It is the same as the original (except the battery).
>
> j
>
>
> On Tue, Jul 24, 2012 at 1:35 PM, Peter M�rck <peterm@sunsetselection.com>wrote:
>
>> **
>>
>>
>> Damnit!
>> The 14042 below IC26 in the schematics is marked IC34, but I see now
>> there's
>> another IC34 down in the lower right.
>> Ok, add another typo and give it credit for some more confusion...
>>
>>
>> ----- Original Message -----
>> From: "Jed Jorgensen" <jed.jorgensen@gmail.com>
>> To: <PolySix@yahoogroups.com>
>> Sent: Tuesday, July 24, 2012 9:55 PM
>> Subject: Re: [PolySix] Re: Polysix contact strip
>>
>> Is that a typo (34 vs 24)?
>>
>> IC26 pin 5 should go to IC24 pin 5.
>>
>> jed
>>
>> On Tue, Jul 24, 2012 at 12:21 PM, tonezone020
>> <swamp.gigs@googlemail.com>wrote:
>>
>> > **
>>
>> >
>> >
>> > Hi Peter,
>> >
>> > I bridged IC26 pin 5 --> IC34 pin 5 and there's continuity to IC22 pin
>> 11
>> > , however doing so knocked out the Bank A thru to Write switches and
>> when
>> > the I change patch switches, the sound played doesn't.
>> >
>> > Any pointers to where to look ?
>> >
>> > Thanks
>> >
>> > Tone
>> >
>> >
>> > --- In PolySix@yahoogroups.com, Peter M�rck <peterm@...> wrote:
>> > >
>> > > 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 M�rck
>> > > > > 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
>> > > > > M�rck <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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