Korg Poly800/EX800 Users

Hi Malte,

sorry for the delay in getting back to you. I have an original EX-800 service manual and that section is much clearer. So if you still need help, let me know and I will have a look at it and let you know the details. I think your thinking is correct in that you need R159 or otherwise master tune cannot work.

Mike.

--- In korgpolyex@yahoogroups.com, Malte Rogacki <gacki@...> wrote:
>
> Hello,
> 
> I'm still trying to fix my dead Poly 800's; and I've made some progress.
> I'm still trying to figure out the various revisions and related boards.
> 
> #1 (working): "old" revision (without battery solder pads), KLM601
> #2 (partly working): new revision (with solder pads) but no battery
> pre-installed, no KLM601 or 601a
> #3 (non working): new revision with battery installed, KLM601a
> 
> #2 works actually pretty well; however Master tune would not work and the
> joystick would make some problems (bending only upwards, bend range only
> zero or full). Close inspection reveals that R159 is not installed here;
> however the PCB looked as if no KLM601/601a was ever installed before.
> Strange.
> 
> Since this part in the schematics is very hard to decipher here are my
> questions:
> 
> 1. Am I assuming correctly that for KLM-601 to work R159 has to be present?
> Or is a wire jumper needed instead? I don't see how the Master tune would
> otherwise be connected at all...
> 2. Does the absence of R159 indicate that originally a KLM-601a was to be
> placed here?
> 3. Could KLM-601 be just omitted at all and instead R159 be used?
> 
> Thanks,
> 
> Malte
>