Vintage Synth Repair

There is no resistor on the input going to pin 12 of z2.  The
arrangement of the board is backward from the 4034 I have here.  I
have several of these from tim smith's old stuff and they are probably
mostly broken. First one oscillates when I put it in an omni synth
board (using tube socket pins ;-) SAves a lot of time!)  They only
have the number 5400601F on them that I see.  4 3086's, a dual FET in
can, a 301.  -Bob