Vintage Synth Repair

Hi everybody!
I have an old Crumar DP-80 Piano keyboard to repair.
I can't get any sound out of it.
Does anybody know where I can find schematics, service manual or any 
information than can help me to repair it?
Thanks in advance

Francesco

--- In vintagesynthrepair@yahoogroups.com, "elenapestrezova"
<prologic@...> wrote:
>
> Hi everybody!
> I have an old Crumar DP-80 Piano keyboard to repair.
> I can't get any sound out of it.
> Does anybody know where I can find schematics, service manual or any 
> information than can help me to repair it?
> Thanks in advance
> 
> Francesco
>cut and paste this link

http://members.aol.com/DBmElect/crumar.html

also www.synthzone.com

Scott