Lwrs10
Super Member
Been awful busy with work and other hobbies, mostly lurking here a bit now and then when I can find the time. Haven't touched any stereo gear for months and months short of listening.
The only time I had an issue with an M-70 popping the breaker as I recall was when one side of the amp was toasted (shorted outputs) and just pulling too much current. Looks like it was gone over but have you checked all the adjustments again? The X-power supply on them really is a bitch on the supply circuit for some reason.
I did align the power supply per the service manual.