H7874 power supply

Robert Armstrong bob at jfcl.com
Sun Mar 29 13:14:34 CDT 2020

>Maciej W. Rozycki <macro at 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,

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