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Subject: Re: [korgpolyex] Re: where to find parts to replace Q1 and Q18? bringing dead polys back to life!

From: Marcus Wilson <JB@...>
Date: 2007-11-11

Hi Mike,

I've been tossing up whether to reveal this, as I have needed to find some more parts to fix one of my korgs, I have 2.5 now, (the .5 works but is missing keys and a joystick among other things)

now that its in the egroup archive, anyone taking the time to read through the archive will find the answers they seek.

I imaging the supply of "dead" korgs will dry up once everyone tries this on their machine before flogging it for parts

anyway, for the good of the community, lets hope it does help to bring more back to life, so that there are more potential buyers for the upgrade kits!

best regards,

Marcus Wilson

On 11/11/2007, at 11:29 AM, korgpolyex800 wrote:

Marcus,

we should probably document your "secret" somewhere on this site.

Mike.

--- In korgpolyex@yahoogroups.com, "Jon" <shonokij@...> wrote:
>
> Thank you!
>
> I'll let you know if I get it to work.
>
> //Jon
>
> --- In korgpolyex@yahoogroups.com, Marcus Wilson <JB@> wrote:
> >
> > Q1 and Q3 can be replaced by:
> > BD140
> >
> > http://www.dse.com.au/cgi-bin/dse.storefront/
> > 4735dc390a33bb062740c0a87f9c06b4/Product/View/Z1444
> > .85c ea
> >
> > Q18 can be replaced by:
> > BD139
> >
> > http://www.dse.com.au/cgi-bin/dse.storefront/
> > 4735dc390a33bb062740c0a87f9c06b4/Product/View/Z1443
> > .85c ea
> >
> > just be sure to ensure they are in the right way around!
> >
> > I have had 3 polys with no powerup, and dirty looking transistors.
> >
> > By replacing these 3 transistors I have been able to resurrect 3
> > polys so far!
> >
> > this secret is now out, and good luck to all who wish to try to
> > repair a dead poly using this replacement method.
> >
> > Once these are replaced you should be able to see 11 P on the
display
> > of the poly, and re-load your patches.
> >
> > Best Regards,
> >
> > Marcus Wilson
> >
> >
> >
> > On 10/11/2007, at 10:35 PM, korgpolyex800 wrote:
> >
> > > Jon,
> > >
> > > I did a google search on "NTE185 replacement" and "NTE254
replacement"
> > > and got plenty of hits where you can get those transistors.
> > >
> > > Let us know how you progress.
> > >
> > > Mike.
> > >
> > > --- In korgpolyex@yahoogroups.com, "Jon" <shonokij@> wrote:
> > > >
> > > > Hi!
> > > >
> > > > New to the group and proud owner of a broken Poly 800 MKII!
> > > >
> > > > The guy who owned it before me tried to restore it, with poor
> > > results (I think his plan was to
> > > > cover it with solder and pray it works afterwards.. it didn't!).
> > > >
> > > > I've cleaned his mess up. But I'm missing Q1 and Q18 looks kinda
> > > abused.
> > > >
> > > > Since Q1 - B744 is no longer in production. It's replaced by
NTE185
> > > - hard to get for me and
> > > > expensive. And it's the same with Q18 - B794 replaced by NTE254.
> > > >
> > > > So I was wondering if you guys have any suggestions for other
parts
> > > i could exchange Q18
> > > > and Q1 with?
> > > >
> > > > Thanks!
> > > >
> > > > //Jon
> > > >
> > >
> > >
> > >
> >
>