Just what information from a schematic are you after? That might help us to direct you to what you need.
The only buttons missing are the Chord, Hold & Poly buttons. Since a EX800 doesnt have a keyboard, Korg ommitted those buttons.
Since those buttons were not included, there will be three diodes missing as well for each of those buttons.
The joystick is also obviously not on a EX800.
But the main board inside a EX800 is the exact same as the one inside a Poly800. If I had an EX800 and insisted on having the three extra buttons and joystick, I could install them without too much difficulty since the mainboard inside a EX800 has support for them already in place.
Why on earth would Korg go out of there way to create a new mainboard for a EX800 when a Poly800 board will work?
I suspect one thing that is different between a Poly800 main board and EX800 main board is the code on the ROM/Firmware chip to give the EX800 some sysex capabilities that the Poly 800 M1 doesnt have.
But that's a software difference, not a hardware difference.
As far as I know, there isnt anywhere online that has a pdf EX800 service manual/schematic. You might find an actual paper copy/manual on ebay.. but you'll probably have to pay around $20 for it.
-Blaine
--- In korgpolyex@yahoogroups.com, "phm050358" <phm050358@...> wrote:
>
> I do not think the schematics are exactly the same.
> For example, on board buttons and display, the number of diodes are not the same, the number of buttons is not the same.
> So I think there may be other important differences.
> That is why I am looking for the service manual of the EX-800.
> --- In korgpolyex@yahoogroups.com, Michael Hawkins <korgpolyex800@> wrote:
> >
> > Use the Poly-800 (PS-800) schematic. It's almost exactly the same as the EX-800.
> >
> >
> >
> > ________________________________
> > From: phm050358 <phm050358@>
> > To: korgpolyex@yahoogroups.com
> > Sent: Saturday, October 6, 2012 3:43 AM
> > Subject: [korgpolyex] EX-800 Schematic and service manual
> >
> >
> > Â
> > Hi,
> > I can not find the EX-800 service manual and schematics.
> > Thank you for your help.
> > Philippe.
> >
>