Hi again, Should IC31 and IC30 pins 7 be connected to each other ? Also, should pin 1 from both run to ground ? As you can tell, I'm a complete novice trying to make sure about reading the schematics ! I'm in the UK by the way. Where are you ? Regards, Tony --- In PolySix@yahoogroups.com, "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 Mörck <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 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 > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > > > > > > > > > > > [Non-text portions of this message have been removed] > > >
Message
Re: Polysix contact strip
2012-07-24 by tonezone020