On 18 Nov., 21:39, bok...@zonnet.nl (Gerard Bok) wrote:
> On Mon, 17 Nov 2008 13:00:54 -0800 (PST), "borat.gunter"
>
>
>
> <borat.gun...@googlemail.com> wrote:
> >one friend just plug the 4 pin power connector in the wrong way to her
> >hard disc.
> >It seems that the part which is used to protect the over voltage has
> >been burn-off.
> >I am gonna change the part which is "physical" broken and back up her
> >data.
>
> >i wrote down the label on the component as
> >AE VU
> >GP804
> >it has only 2 pins.
>
> >I googled around, did not find the part datasheet.
> >has anyone idea or reference of the schematic which is used for the
> >hard dics pcb power protection?
>
> Tricky business :-)
> But on the bright side: If the part is indeed an overvoltage
> protection device (which I doubt) going into 'permanent
> protection mode' (i.e. short circuit) you could simply cut one of
> it's wires.
> As the drive is likely to be toasted anyway, this will either get
> the drive working for a while or will otherwise do no further
> harm.
>
> --
> Kind regards,
> Gerard Bok

I have asked my friend to take a picture. will follow up
But I am curious about the schematic part of such circuit. How does
the subcirciut work. No only in oder to fix it, more like the
principle.
I was thinking that the burn component were a fuse-like thing, which
would be sacrificed in order to protect the parts behind.

After discussing with my co-worker I think the hardware vendor would
pay more attention or effort on fuse-like component, since the
connector alone is really hard enough to connecte in the reverse way
which my friend did. I can't do that on my pc ;-(

Any schematic reference would be really helpful.
Thanks