Vintage Synth Repair

Hi again! I finally had a chance to go through this. Firstly, the synth did need need a full calibration. I've got the calibration values ultra close (considering the trimmers a still original ones). Here are my responses to your reply:

>> Verifying if the ADSR:
I can confirm that it behaved as you described. I also tested the attack & gain in the AR and can confirm that they work as well.

>AR:
To clarify, what I'm saying is that if you set the AR gain is increased above 0 you will hear the signal regardless of whether you play a note or not. It also makes no difference whether you have the gain selector switch selected one way or the other (to AR or ADSR). As long as AR gain is up in any way, you'll hear the signal. (Perhaps I'm crazy and it's *supposed* to do this. I thought that that it was only supposed to pass a signal when a note is played.)

> Semitone change on release & CV Memory:
I actually gave all three boards a thorough cleaning so no dust or grit is present. After the calibration, the note still swings by a semi tone on release. I'm heading back to Board A now to troubleshoot it further.