Discussion about the Korg PolySix synthesizer

I've been trying to help my friend repair his P6 which
was the victim of nicad leaks once again. 

I've carefully replaced and verified all of the traces
but I'm still having an interesting problem.

The ENV and VCF controls behave normally.

However, there is no response from:
OCT 
WAVEFORM
PW/PWM
SUB OCT
LFO MOD
FX MODE 
SPEED/INTENSITY 

I am thinking that the problem lies in the output part
of the DeMux and was curious what the relevant CMOS
chips were for the signals that aren't showing up.

cheers! [w]