On Sun, May 8, 2022 at 1:02 PM Maciej W. Rozycki via cctalk
wrote:
> In the H7821 it's -9Vdc return pairing with -9Vdc supplied on the yellow
> wire (an isolated circuit). Pin numbers 14 & 13. Try measuring voltage
> across the suspicious connections as any reference to ground may not be
>
On Sun, 8 May 2022, Tony Duell wrote:
> > In the H7821 it's -9Vdc return pairing with -9Vdc supplied on the yellow
> > wire (an isolated circuit). Pin numbers 14 & 13. Try measuring voltage
> > across the suspicious connections as any reference to ground may not be
> > indicative.
> >
> >
Hi Peter,
> > Right, my notes indicate Nichicon PL parts might be problematic too, e.g.
> > one at 4700uF/10V on 5V output of the H7826 PSU.
> >
>
> What is H7826 used in? I don't think I have any of those.
DECstation 5000/1xx systems and TURBOchannel Extender boxes. Not sure if
anything
