"The main circuit boards and version 1 OS EProms."
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EVERYTHING SYNTH
via The Analog Lab which is running a course on synth repair (see this post).
Unbeknownst to Harlan, someone had done a very peculiar mod on this lovely little synth… THE POWER TRANSFORMER HAD BEEN REMOVED. So, this means that there was no step-down transformer to turn the 110V from the wall into a more comfortable +/- 15V and the ground wire (which was grounded to the chassis, mind you) was soldered right into the AC.