Korg Poly800/EX800 Users

yes, there are trimmers. You can download the schematics from the files
section.
However, if you have not touched them then there should not be any need
to adjust them.
Did you check that the AtomaHawk board was not contacting the caps that
are underneath? That is a definite possibility.
You also should double triple check the wiring of the AtomaHawk to the
main board. Those wires are easy to connect wrong, swapped or even a
single strand shorting a connection.
/MikeOn Thu, 2019-04-25 at 13:49 -0700, pizzicato2007@yahoo.com [korgpolyex]
wrote:
> New query- what parts of the board are controlling cutoff and
> resonance? maybe that is part of the problem? Are there trimmers I
> may need to reset before reinstalling? Apologies in advance for
> reviving this dead thread once again. 
> 
>