VAX 11/750 power supply fault

[J Blaser]

Quoting Dave McGuire <mcguire at neurotica.com>:

> On Nov 30, 2007, at 10:30 PM, J Blaser wrote:
> > cheekiness, does anyone have schematics and/or Engineering Drawings 
> > for this 11/
> > 750.  Maybe I could actually try to sort it out if I had some more 
> > information,
> > at least until I electrocute myself!  :o
> 
>    I'm fairly certain that I have 11/750 prints here, but I will have to
> find them.  Let me know if you don't find them elsewhere quickly enough
> and I'll start digging.

Thanks, Dave, for the offer (and to all others giving helpful advice in this 
thread).  I *did* find the schematics last night on vt100.net/manx, so I just 
need to spend some time now looking them over, and seeing what I can do.

I do have some very basic tools, and a 'scope, and I guess my plan is to try to 
look for some bad passives first, unpowered, then take whatever next steps seem 
reasonable.  These PSs are pretty tightly packed, in a 3-D kind of way, and I'm 
not sure I'm up to poking around inside with it powered.  I might touch 
something I shouldn't with a probe, and make things worse! ;)  We will see...

As things progress I'll give a report, but don't hold your breath for quick 
news.  I've got a lot to learn first.

Thanks.

- Jared