Date   : Thu, 19 Jun 2003 20:03:00 +0100
From   : Mike Tomlinson <mike@...>
Subject: Re: BBC B PSU delay

In article <779b2a24c%mjfoot@...>, Michael Foot
<mjfoot@...> writes

>My Model B takes a couple of minutes to start up from a cold switch on, but 
>starts straight away everytime after that. Could someone remind me which
part of 
>the PSU needs replacing to cure this?

Capacitor C9.  It's very near the switching transistor heatsink, which
causes it to get hot and ultimately fail.  220uF if I recall correctly.
Make sure you use a good quality 105degC replacement.

Mike