From: dave06a at dunfield.com> To: cctalk at
classiccmp.org> Date: Thu, 28 Feb 2008 07:57:06 -0500> Subject: Re:
VAXstation/MicroVAX 2000 CPU/FPU overheating?> > > > A good idea, but I
don't think this is the case. According to the technical> > > > OK... Not
having seen the machine, all the rest of us can do is make > > guesses, most of
which are likely to be wrong :-)> > If my response came across as critical, I
apologize, this was not my intent.> I welcome any and all suggestions.> > >
> > > I'll have to do some measurements. I could try hard-wiring the fan to
full> > > power, however this thing *should* work as it is designed, and the fan
supply> > > > True. On the other hand, if making the fan run at maximum speed
all the > > time keeps the machine running, it's worth doing that mod (IMHO) to
save > > the problem of replacing the CPU or FPU chips.> > Agreed that it
wouldn't hurt to have the fan at full power, but the point I> was trying to make is
that this thing gets *SO* hot that I'm convinced theres> a fault, which should be
found, not masked.>
Hi
One other thing. Most bus terminators use a Thevenin style circuit.
If the ground or rail line goes open, the load on the drivers goes up
with little effect on termination ( for mixed data ).
This might cause increased power.
Dwight
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