Sorry to dig up an old thread, but I’m also repairing an original micro synth.
Is it possible to simply bypass the voltage regulation circuitry and simply feed the unit with 12v? Seems like a quick cheap fix. I’ve done that with an old Polychorus, but from what I remember that pedals transformer rocked it down to 12v already. I’m not real concerned with keeping the unit “original” as it is pretty well used. The convenience of using a power supply outweighs the “keep it original” voice in my head.
Thanks!