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Subject: Re: Plugged in Car-charger - smoke out of my box - no charging
From: Fred Maxwell (rockbox_at_anti-spam.org)
Date: 2004-03-16


blaou wrote:

> I used the standard 9V Voltage. The Adapter is capable of 800mA, but the
> Archos only need 500mA - could this be a problem?

If the supplies were voltage-regulated, then it would not be likely to
be a problem. But they are not regulated. That means that the voltage
drops as load increases and the Archos power supply can provide 9V at
1/2 amp (500ma) of current.

I just took the 9v, 600ma adapter that came with my Archos Studio 10 and
plugged it in. With no load (nothing attached), the voltage is 14.5V!
Put 600ma of load on it and it will drop closer to the 9V rating. Now,
if it was rated at 800ma, then the same 600ma load would probably result
in a significantly higher voltage. That may be what cooked your player.

> Of course I unplugged the box.

Good. Just wanted to be sure.

> It's still booting up and playing - but I cannot charge it anymore....
> Finding an electronic engineer will be hard. And finding the broken part
> probably even worse.....

Just look for a competent electronics repair shop and see if they will
fix it. If not, see what Archos charges to fix an Archos unit that
doesn't charge.

Regards,
   Fred Maxwell

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