[CUBE] Power Consumption

[Eng Yew Lee]

I am not too techie, but I have noted that plugging
and unplugging my Cube from its power supply (while
still connected to the mains) can be a very sparky
event (literally sparks fly).  I did this when I had
to do a real hard reset due to a faulty PL 1GHz.

I don't know why this happens, perhaps it has to
switch over from its load gizmo to driving the Cube. 
Or it is caused the high power DC.

Morale of the story: Don't unplug your Cube from its
power supply when still connected to the main.  

Thanks for the insight!


--- Gnarlodious <gnarlodious at cybermesa.com> wrote:
> Entity Eng Yew Lee spoke thus:
> 
> > I should have some headroom
> > as long as I dont overload my USB and Firewire
> ports.
> It's all a matter of heat dissipation anyway. Good
> to keep in mind for when
> we hit 6gHz processors and 36 inch LCD's.
>  
> > I love my cube!  Its a nerds delight!
> More nerdy babbling about the PS:
> 
> One more oddity of the Cube's bizarre design. The
> external power supply
> apparently needed a gizmo on the output side to give
> it a polled 2 watt
> load. Under no-load conditions the pulse increases
> to infinitely wide and
> the magnetics saturate and burn out the supply.
> This is not an issue with other designs(including
> PC's) because the PS is
> always connected to a minimum load. If you unplug
> the load and run the PS
> you run the risk of burning it out.
> The Cube's PS had to be designed to be potentially
> unloaded(unplugged) so
> the upshot is that the discrepancy is not in the
> Cube itself but in the PS.
> 
> It looks like the 11-12 watt "no-load" load is what
> Apple decided is
> necessary to keep the pulse from overmodulating with
> the variance a result
> of periodic polling the Cube to decide if it is
> plugged in or not.
> 
> Hope that makes sense . . .
> 
> -- Rachel 
>
http://www.Gnarlodious.com/Entities/Computer/Cube/Cube.html
> 
> 
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