IBM PX and XT Power supplies

[Terry King]

IBM never released the schematics, even to internal IBM sites wanting them.

Early on, we learned that there was a optoisolator that often died.

There WERE aftermarket schematics available for about $40 in the mid-80's; 
I don't
think I have any?? A friend still at IBM may.. I'll ask when I see him.

The XT versions were a lot more reliable; I have 8 XT's that get turned on 
only once or twice a year, now, and I've never lost a power supply or 
system board.


Regards, Terry King  ...On The Mediterranean in Carthage, Tunisia
terry at terryking.us