Discussion about the Korg PolySix synthesizer

Specifically IC34 pin 5 should not be connected to IC26 & IC24 pin 5.

On Tue, Jul 24, 2012 at 2:29 PM, Jed Jorgensen <jed.jorgensen@gmail.com>wrote:

> I don't believe IC34 should be directly connected to the others. Double
> check the schematics for that.
>
> J
>
>
> On Tue, Jul 24, 2012 at 2:26 PM, tonezone020 <swamp.gigs@googlemail.com>wrote:
>
>> **
>>
>>
>> Hi,
>>
>> I'd been following Old Crows instructions but didn't spot those two
>> diagrams Thanks for that, especially the see thru.
>>
>> Re IC24 IC26 and IC34 - all pins 5s are linked.
>>
>> The buttons are back except Bank D,Patch 4 and 8 - probably new tacts ?
>>
>> Patches no longer storing at the moment.
>>
>> Found dry joint on IC30 Pin 7...
>>
>> I'll follow the +5 thru and then test again.
>>
>> Best,
>>
>> Tone
>>
>>
>> --- In PolySix@yahoogroups.com, Jed Jorgensen <jed.jorgensen@...> wrote:
>> >
>> > 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@
>> ...>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@...>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@...>
>> > >> 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@...>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
>> > >> > > > > > >
>> > >> > > > > > >
>> > >> > > > > > >
>> > >> > > > > > >
>> > >> > > > > > >
>> > >> > > > > > > [Non-text portions of this message have been removed]
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>> > >> ------------------------------------
>> > >>
>> > >> Yahoo! Groups Links
>> > >>
>> > >>
>> > >>
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>>  
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>
>


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