I own one of these, very beat up condition and it didnt power up last week. Turns out it was a 10uF/35V cap inside the synth
chassis shorted. Installed in 1985, 38 yrs with 37v on it , its failed. I replaced with an electrolytic and now powers up but
theres no signal output and have the uncal error with status 004 which is "amplitude unleveled" ?
Is there suppose to be a battery in these to keep memory?