Korg Poly800/EX800 Users

i have NO IDEA!!

i did at one stage have a fellow lister here that was offering to  
send me some parts to fix it, but then lost touch with them

i bought it from a guy off this list who used the parts to fix up  
another one he had, it was missing the tuning board as well, so i  
made up a replacement to fit.

best regards,

JB
On 31/05/2007, at 12:29 AM, David Mochen wrote:

>
> Question, if you don't mind: What brought that Poly 800 to such a  
> dilapidated condition? Was it smashed by Pete Townshend during a  
> Who concert? ;-)
>
> dB
>
>
> ----- Original Message -----
> From: Marcus Wilson
> To: korgpolyex@yahoogroups.com
> Sent: Wednesday, May 30, 2007 12:11 PM
> Subject: Re: [korgpolyex] Re: ITS ALIVE
>
> The poly has a stage in its circuits that generates the +/- 9V it
> uses in the analog stages, and also the +5V to power up the digital
> circuits
> The way that it creates these voltages in the day was fairly
> standard, however these days is easily replaced by a single IC.
> It is one part of that section of the circuit that fails, the hardest
> part was to find a present day equivalent part number for the part
> used in the circuit.
> The easiest way to check if your poly is also suffering the same fate
> is to check the +/- 9V at the joystick and the +5V at the IC's if you
> dont see these voltages with a +9V DC centre pole power supply
> attached, odds are yours suffers the same fate.
> I have had some other issues on my dead korgs, however none of them
> affected the board with total power loss just one stage or other in
> some other part. (ie headhpones didnt work but audio out L/R worked)
>
> One of my Korgs is still missing some parts to make it complete, and
> I would welcome some parts to complete it, if anyone wants to trade
> for this knowledge im keen.
>
> Im missing a joystick, 4th and 9th white key from the bottom, top 8
> white keys, top 3 black keys, and a contact pad strip.
>
> Best Regards,
>
> JB
> On 30/05/2007, at 10:56 PM, narfman96 wrote:
>
> > JB,
> > Without divulging all your hard earned secrets what is it that
> > fails in these synths?
> >
> > Thanks, Narfman
> >
> > --- In korgpolyex@yahoogroups.com, Marcus Wilson <JB@...> wrote:
> > >
> > > OK So i have had a few minutes and managed to debug this broken
> > poly.
> > >
> > > It now is 3 for 3, with the new broken poly back to life with the
> > > change out of 1 part.
> > >
> > > So dont despair! if you have a korg that is broken, and wont
> > powerup,
> > > there IS (i believe 99% sure) a cheap and easy fix to make it work
> > > again.
> > >
> > > best regards,
> > >
> > > JB
> > >
> >
> >
> >
>
>
>
>