Repair methods (was Cromemco 3101/Beehive B150 score)

[Tony Duell]

> > I would love to see anyone understand an SMPSU without understanding
> > analogue electronics...
> 
> That is, I think, why I have so much problem trying to fix them - my
> understanding
> of analog is inadequate.

The main problem I have with fixing SMPSUs is missing some seemingly 
minor fault (like a diode that breaks down under load only) which causes 
all the nice, expensive, new components that I've fitted to blow at 
switch-on. A series light bulb helps (if only to reduce the shock to _me_ 
when the thing tries to put a dead short across the mains), but won't 
always save the expensive chopper transsistor.

-tony