On Saturday, September 11, 2021 at 21:31, Chris Zach via cctech wrote: > Ok, thanks!
You're welcome. > I just tried mine again, it's a dud so I am going to have to figure it > out. First step was to see if the rectifier had any voltage so I > disconnected the + side and checked it with a voltmeter. With 120v > plugged in I saw 200v DC which is probably not too far off. That seems > to go to the inverter card, which I don't know what it's doing with > that. There's a reasonably complete theory of operation of the "B" power supply (which is what you have) in section IXB of the HP 1000 M/E/F-Series Computers Engineering and Reference Documentation. There were several revisions of the "B" supply, but they all used the same motherboard (as far as I know), so the various plug-in card functions would be pretty much equivalent across versions. > Is there a block schematic of what does what on this PS? Page IXB-6 of the above manual has one. There's also a troubleshooting flowchart on page IXC-3. Section IXC is specifically for your supply version and has the appropriate schematics, but the theory from the earlier "B" supply should be broadly applicable. -- Dave