I've been restoring a Polysix, and now that battery and other issues are out of the way, I'm moving on to the fun stuff like tuning adjustment and throwing in the ModyPoly. One thing that has become an obvious problem right out the gate is Decay settings on anything under 5 (With all other parameters in any position).
All I get is almost inaudible clicking at 1, to pitter-patter clicking at 4. By 5 it acts as if I would expect a Decay knob to sound. This happens no matter what I set other parameters to. All I can use is the plugin as a control, and it seems my decay knob is 2-3 steps behind the plugins decay all around the dial. Decay set to anything under 5 is completely unusable in sound design.
What I've checked so far-
- I am getting -5 +5 volts at the CN05 pin 7 connector when turning the decay knob.
- I've checked the Service Manual and I'm getting the correct voltage just about everywhere else I've checked, minus one spot-
- When following the manual for adjusting attack time, CN05-12 is not giving me +0.9V no matter how I adjust the attack knob. 0.001V mostly. Waiting on my oscilloscope to complete the attack time test before I call this a problem. Listing in case it's helpful.
My ears aren't sensitive enough to tell if attack/release is also off on the shorter times, but like the decay knob, anything over 5 seems to be working just fine anyways. Or, this could all be normal, and I just look stupid... but I doubt it is.
Edit- I made a short video highlighting the problem-