On Thu, Sep 09, 1999 at 01:18:37AM -0400, der Mouse wrote:
> I've acquired an ELC with fried video electronics.  I'd like to run it
> headless, but want to toss the big chassis with the video goop in it.
> 
> After spending an hour or two working on it, I got the thing apart
> enough to take the power supply out.  I also got the small board at the
> back bottom, the one that breaks out the CPU card-edge to the various
> connectors, free.  I then plugged in the power supply and a serial line
> and turned it on.
> 
> It worked.  But after maybe a total of ten to fifteen minutes of
> power-on time, the power supply seems to have fried itself, presumably
> because it's missing the load presented by the video electronics.  It's
> not the CPU board that's fried, verified by swapping it into a working
> ELC.  Applying a voltmeter to the solder points where the power

You've been lucky. When I tried this I got a nice white smoke after 10
seconds :)
> connector wires are attached indicates that the +5 lines are being fed
> only about +0.8 volts - no wonder the CPU doesn't run.
> 
> Therefore, I'm inquiring of the collective wisdom here if anyone knows
> either (a) how much power the CPU sucks and at what voltages, so I can
> drive it from a more general-purpose supply, or (b) what load resistors
> I'd need to add to keep the power supply from frying itself for lack of
> the video load.

I guess using an old PC power supply would be enouth. I didn't try that
yet, though ...

--
Manuel Bouyer, LIP6, Universite Paris VI.           Manuel.Bouyer@lip6.fr
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