VAX 4000 PSU (H7874) Schematics

[Bill Degnan]

There is a guy named at Joel from global-itcorp.com who has experience with
these, he may have an idea.  Tell him you spoke with Bill Degnan.
b

On Thu, Jun 7, 2018 at 3:49 PM, Aaron Jackson via cctalk <
cctalk at classiccmp.org> wrote:

> I am trying to repair a VAX 4000 power supply. Does anyone have the
> schematics? I can't find anything on BitSavers and I'm not completely
> convinced it was even designed by DEC.
>
> The VAX turns on and the status LED stays on F. The DC lamp does not
> illuminate on the PSU. 5V rail appears fine but there is nothing from
> the 12V rail. There were some *very* dodgy looking caps which I have
> replaced, and some *very* exploded MOSFETs, which I have also
> replaced.
>
> If anyone has schematics, or know where I might find them, it would be
> much appreciated.
>
> Thanks,
> Aaron.
>
>