Hi All,
I have a fried Mesa Mark IV for a repair. It's the later edition I guess (with 74LS14 and 74LS138 in a switching circuit and +5 / +12V voltage regulators in a power supply).
Basically the power supply is a bit fried and can't read value of some resistors (I can measure them, but they have suspiciously low resistance). I have a schematic for Mark IV, but not complete (without power supply) and for the first Mark IV issue.
Can anyone share Mark IV second edition schematic if possible?
I will be much appreciated.

Greg, I'm sure if ask some specific questions over on the Boogie Board, you'll get the answers you need:
Boogie Board