Korg Mono/Poly

Hi Alan

>  From your description it sounds like you filter chip SSM2044 may have 
> gone.  
first he should check whether there is a signal at pin 1 (input) of the 
SSM2044
Also it is worth checking the four ICs 2033 at pin 8, 3 and 12 whether 
there is a signal.


> mean it seems that the rubber contact has corroded or the PCB contact?  
> You night find the rubber strips on ebay. same type as in the polysix 
> and another few keyboards.  as for finding a complete keyboard PCB that 
> might be more tricky.
check also http://www.oldcrows.net/~oldcrow/synth/korg/polysix/keyclean.html

If the contacts don't work ever, then maybe also some of the diodes in 
the keyboard matrix might have died.

Florian