Date   : Wed, 29 Dec 2004 15:16:13 +0000
From   : Jules Richardson <julesrichardsonuk@...>
Subject: Re: MDFS has died

On Sun, 2004-12-26 at 23:55 +0000, Jonathan Graham Harston wrote:
> > Message-ID: <1103375948.24483.9.camel@...>
>  
> Jules Richardson <julesrichardsonuk@...> wrote:
> > On Fri, 2004-12-17 at 23:32 +0000, Jonathan Graham Harston wrote:
> > > Grrr... I'm a hardware user, not a hardware repairer...
> > 
> > Disconnect the PSU and check the boards for shorts - chances are it's
> > the PSU that's gone up the spout though. Check the bridge / chopper
> > transistors / filter caps for shorts as those are probably the most
> > likely culprits.
>  
> As soon as I took off the lid it was obvious what was wrong.
> R3 completely burnt out! 

Resistors don't often burn out of their own accord (although it's
typical to find some that are pretty discoloured in old PSUs due to them
being run at close to tolerance for years). Chances are something else
has failed and caused it to let go like that.

> Swapping the PSUs worked.

At least you know it's just the PSU. Worth trying to fix it, at least to
bring another MDFS back into the world!


All quiet on the Acorn front here at present, although I think I've got
some webspace with decent bandwidth and disk space sorted out so
hopefully I can put some good quality pics online at last :) 

cheers

Jules