Kawai Synthesizers

Hello to the group!

I'm new here, in the list. Recently I bought a SX-240 with some problem.
This especially likes to me, because I can jump inside the synth and learn
about how it works while I'm fixing it.

Anyway I think there's more problems inside than I ought to find. I get the
felling that some of the DCOs/Filters/AMP stages are wrong or not properly
adjusted. Before to deal with these problems with the 'try and error method'
I want to ask for some help.

If someone knows where can I find schematics or block diagrams or service
manual I will be happy to know it too.

Thanks!

Joan M.
NLA