Archive of the former Yahoo!Groups mailing list: Korg Poly800/EX800 Users

previous by date index next by date
previous in topic topic list  

Subject: Re: [korgpolyex] Is it possible to attatch a keyboard to an EX800 mainboard for a custom synth

From: Michael Hawkins <korgpolyex800@...>
Date: 2008-11-26

This link points to the zip file that contains the Poly-800 schematics. The important page is the keyboard layout which is P800_5.gif.

That will give you the EX-800 side of the equation.

From: april exe <april.exe@...>
To: korgpolyex@yahoogroups.com
Sent: Wednesday, November 26, 2008 10:30:07 AM
Subject: RE: [korgpolyex] Is it possible to attatch a keyboard to an EX800 mainboard for a custom synth

Thanks for the reply. I have the service manual for the classic , pro x etc and I dont think much has changed basically. There is after touch but a seperate line. The initial ribbon cables, two, left and right side aparantly, they go first to what should be the scanning circuit then to the mainboard. Is there a connector I could get for the EX 800 and work backwards ? is there any circuitry in the Poly 800 keyboard or do the contacts (the keys) simply go on/off to the connector on the EX board ? If it all came about Id go as far as making custom contacts. mimic the Poly 800 keyboard and pretty much do away with all else aside from the keys and mounting ?
 
Its just a R&D pipedream at the moment should I send the internals of the TR to another rig.
 
Nice little TR rom mod I came up with here........ .. http://april. exe.tripod. com/id25. html there will eventually be more than one of the HI synth series hanging around getting punished and this TR will likely be the first extra shell/keys-
 


 

 




To: korgpolyex@yahoogro ups.com
From: korgpolyex800@ yahoo.com
Date: Wed, 26 Nov 2008 06:04:47 -0800
Subject: Re: [korgpolyex] Is it possible to attatch a keyboard to an EX800 mainboard for a custom synth

Without even knowing what the inside of a TR61, I can say with 99.9999 percent certainty that there is zero chance of this being able to be done by simply find a new connector for the EX-800.

That being said, to begin with, do you have a Korg TR61 service manual?

If you do, have a look at the schematic of the keyboard and see if it uses a x/y matrix scheme or not.

Or, does it have touch sensitivity? Which would imply additional electronics to consider.

But ultimately, with the right amount of knowledge and hacking, this could be done.

Mike.



From: icr2fan <april.exe@hotmail. com>
To: korgpolyex@yahoogro ups.com
Sent: Tuesday, November 25, 2008 2:47:46 PM
Subject: [korgpolyex] Is it possible to attatch a keyboard to an EX800 mainboard for a custom synth

Hi, Is it possible to mount the insides of my EX800 into a broken synth
and use the 61k keyboard?

Ive looked at Poly800 pics and see that I have the same mainboard

The conectors for a TR61 keyboard are different than the cable pic I
see in Poly800 pics.

My TR61 experiments have been going great. There will be a second
broken one here soon so (going to piggyback the extra set of PCM ROM ;)

I will have second case so it would be fun to mount the EX800 in there
and use the keyboard.

my TR61 experiments. .........

http://april. exe.tripod. com/id25. html

The same can be done with the sample RAM.





Windows Live Hotmail now works up to 70% faster. Sign up today.