Re: Lisa 2/10 power supply keeps blowing fuses, help?

Seeing as it blows fuses when it's not connected to anything, I think the fault lies inside the PSU itself.

-Jason

On 4/9/07, Ray Arachelian <ray_at_email.domain.hidden> wrote:
>
>
> I would try to disconnect the widget drive power and data, disconnect
> the floppy data cables, remove the memory and CPU boards, leaving just
> the I/O board.
>
> Since it's a 2/10 you don't have the leaky NiCad battery problem, so
> that's a good thing.
>
> It probably isn't a capacitor issue, but I'd look very carefully at each
> capacitor to see if it looks bulged out or somehow off.
>
> It may be one of the bridge diodes, but if it's blowing the fuse, it's
> likely a load issue, and that's why you'd want to unplug the
> widget/floppy/cpu and I/O board.
>
>
>
> nulldev1ce wrote:
> > My Lisa 2/10 blinked off unexpectedly the other day, and upon pulling
> > and disassembling the 1.8A power supply, I found that the 3A 250V buss
> > fuse was blown. I replaced it with one of the same spec (as far as I
> > know; does it need a slow-blow?) and put everything back together...it
> > blew again immediately as soon as I plugged in the power cable. So I
> > replaced the fuse again, and this time, with the PSU still outside of
> > the Lisa, I plugged in power and it blew again. I tried one more, same
> > thing, then stopped serial-killing fuses...
> >
>
>
> >
>

--~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "LisaList" group. To post to this group, send email to lisalist_at_email.domain.hidden To unsubscribe from this group, send email to lisalist-unsubscribe_at_email.domain.hidden For more options, visit this group at http://groups.google.com/group/lisalist?hl=en -~----------~----~----~----~------~----~------~--~---