The unregulated does not concern me.
There is a small terminal strip between the power supply and the logic card rack. There are 6 very thin wires there, 3 are blue and 3 are purple(?).
Put your meter across the center two, one blue and one purple, This is the 5VDC. I prefer to check the voltage here as it tells me what is at the logic boards. Go out one in each direction, I believe that is 12VDC and the last 2 are the -12VDC.
Adjust accordingly.But the 70007 usually means a LSI-11 (DEC KD11L ) motherboard problem.