I have some notes I made about trying a PC PSU, I don't think it really worked, there are signals to indicate power OK and perhaps others. But perhaps a more concerted effort might yield something that could work.
Regards Rob > -----Original Message----- > From: cctech <cctech-boun...@classiccmp.org> On Behalf Of Robert > Armstrong via cctech > Sent: 29 March 2020 19:15 > To: 'Maciej W. Rozycki' <ma...@linux-mips.org>; 'General Discussion: On- > Topic Posts' <cct...@classiccmp.org> > Cc: r...@jarratt.me.uk > Subject: RE: H7874 power supply > > >Maciej W. Rozycki <ma...@linux-mips.org> wrote: > >numerous Chemi-Con SXF parts scattered across all boards, some leaking > > Yeah, mine is full of "Nippon Chemi-Con" electrolytic too. > > What about just gutting the PS chassis and sticking in an ATX power supply? > I > don't know how the maximum current per output breaks down, but as I > understand it the H7874 is only a 600W supply. That's not a problem for an > ATX supply, and it would have all the required output voltages. You'd have to > run the cabinet fans at a fixed speed and you'd lose the power control bus > feature, but that's not a show stopper. > > Actually my unit is in an R400x chassis full of RF drives, so I believe I > only need > +12 and +5. I don't think the 3.3v and -12 are used in that case. I wonder > how > much current I really need for the drives? I should look that up and I might > be > able to find a surplus dual output supply that would do the job. > > Thanks again, > Bob
