Skyhook1985

Yes, I apparently counted all my toes twice, it is 35 years old not 45. I bought it in 1987(ish). I think I also had that jacket and tie. Also yes, it does have a sustain switch, I will open it again and physically test the switch with a meter to confirm how or if it is operating. For some reason I remember ruling out the switch the last time I had it open. It actually plays for 5 to 10 minutes or so before it starts acting up. That is one of the reasons I was thinking a component on the circuit board warming up beyond tolerance and then crapping out or possibly a capacitor. Though I have the original manual I do not have a schematic. I have had it record into a sequencer program and when it acted up it does record and hold a sustain code. The only way to stop it is to turn the AZ-1 off. When you turn it back on it takes less time for it to act up then the previous time unless you had it off for a while. That again led me to believe heat and/or capacitor as a catalyst. I truly appreciate your feedback and I'm going to open her up and operate on her this week and see what happens. If in the mean time you can think of anything else, please let me know.

I bought my AZ-1 +/- 35 years ago. Everything still works except for one thing; soon after I start playing, it starts to sustain on it's own. This issue started about 10 years ago, so the AZ-1 has been safely kept in a Bass Guitar case. I am in a musical group where it would be cool to bring this out on stage again. I have tried many sound sources, midi cables, batteries and power cords. I have taken it apart and cleaned all the plastic switch covers to make sure it wasn't something mechanical. I am pretty confident this is an electronic circuit component problem or a S/W and/or F/W issue. But I am leaning more towards a component that is heating up, malfunctioning, and then causing the sustain circuit to fail. I hope I can repair it. It's a fun instrument to keep in my magical bag of tricks on the stage. Thank you in advance.