VAX 11/750 power supply fault

[Tony Duell]

> People have been talked through some tricky procedures on this
> list ... For that matter this is maybe the 3rd VAX-11/750 with
> the "REG FAIL" fault and I don't recall ever hearing of one
> getting fixed. Someone has to be the first :-)

Unforutnately (?) I've always kept well clear of the 11/750. I really 
wouldn't want to maitain that CPU....

But I can be eaily persuaded to look at the PSU schematics sometime and 
see if I spot anything obvious. Or at least tlak you through the design 
(which might be somewhat unconventional if other DEC supplies are 
anything to go by [1])

[1] This might not be a problem for you. If oyu don't have any experience 
of SMPSUs, any one is as good/bad as another to get started with. The 
problems generally come if you have fixed ideas ofg how supplies should 
work and then you get something strange thrown at you.

-tony