Crumar Musical Instruments User Group.

Hi

So... Everything works fine apart from Envelopes;

the VCA envelope has problem with Decay - Decay does not work
the VCF envelope seems to be dead completely, none of the ADSR
controls work, neither does Depth knob. But the filter in itself works
and filters the sound nicely.

I opened up the synth and it looks neat - all bords ar in slots and
all ICs are in sockets. Could be easy to fix. But where should I look,
which IC should I replace?

thanks