[CUBE] Sonnet Encore processor upgrade

[Andra and Reid]

Every part?

Nice.

So is this a game of roulette?  Why do only a handful of processors 
cause the cascade failure?  Have you hear of this problem before with 
cube owners?


Reid


On Thursday, Jun 12, 2003, at 15:03 Asia/Tokyo, Tom Davidson wrote:

> Line voltage should have no effect on the internal power supplies in 
> the Cube.
> The External Brick takes the mains AC power and converts it to a 
> regulated
> 28V at 8.125Amps This is supplied to the Cube internal power supplies 
> via the
> 4 pin round connector plug on the bottom of the Cube.
>
> If your DC-DC board fried, it's probably as a result of the extra load 
> of the Sonnet
> CPU board on the 5V supply. The Cube's DCDC board runs close to it's 
> output
> current capability when the CPU is upgraded. If it overheats, the 
> FET's on the
> DCDC board will burn out. This can cause what is known as a cascade 
> failure
> as the 28V external supply is run to all the parts of the cube that 
> normally get 5V.
> If this happens, then nearly every electronic part inside the cube is 
> damaged.
>
>
>
>
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