> > > > ... Which also may well not be RML original. The 380Z has a regulated PSU, > > S100 has separate regulators on each board and an unregulated PSU. > > Indeed, although I do recall a heatsink mounted externally on the back of > the chassis (where the fan would be on the later hardware) with the early > machines - I just don't know details of the internal PSU.
I was going to say that that heatsink didn't look original, but fortunately I kept my mouth shut and didn't insert my foot :-) I've only seen the later black 380Z's with built-in 5.25" drives, first at school and now the one I own. On those the PSU is entirely internal, it's a little chassis that fits round the mains transformer and carries a PCB of recctifiers, regulators, etc. For some odd reason the schematic of that is not in the manual, I guess I should draw it out sometime. It's not complicated. Thinking about it, I do wonder what that heatsink/regulator is doing in an S100 system. Most likely it is the original RML supply and somebody has connected to the unregulated inputs to its regulators -tony
