Thanks again Dean,
Now armed with a new Fluke so I can trust DMM readings a bit more. I emailed Clay too about that some DMM's may give readings on his Sys 80 guide (MPS-U45's) that they are bad, but if the DMM has less than 2.000v on the diode test will continue to give bad readings. Not bad transistors, just DMM not enough grunt to give his readings! Hopefully may save someone else a headache down the track..
I've been going through the
http://www.geocities.com/kirbseepe/repairCPU.html guide as well.
From the start, my Z26 (pin 12) is definately not giving 5v at all. Somewhere to start at least!
