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Well after tearing the whole thing apart and testing it, I belive the issues might possibly be in the external transformer.

I followed the issues with the non working -40 voltage back though the power transistors, caps, and made it all the way back to the tranny and there is no voltages there, although there are other working voltages there.

This Otari PSU is rather interesting because the AC line enters the PSU box then returns to the external Tranny, then returns back to the PSU box. There must be 42 connection points on the external Tranny.

 I was hoping it would not be something like this, I can replace a cap, switch, bad solder joint, but something on this scale? Damn... Where do I even find one of these bad boys? I guess worse case scenario I can add a second PSU running the 40 volt rails and tap that into the outputs of the PSU. Anyone have any ideas?


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