Re: [Discuss-gnuradio] Help polarity inversion

[Eric Blossom]

On Wed, Mar 18, 2009 at 10:04:27AM -0400, Marco Bottino wrote:
> Hello,
> 
> I was doing some test with a 6Volts battery with the USRP in order to be
> able to use my USRP outdoors.
> (Sonnenschein A506/4.2 s http://www.sonnenschein.org/A500.htm)
> Everything was fine when I unintentionally inverted the polarity of the
> battery.
> At the moment, connecting the power converter to the usrp, the led
> doesn't blink anymore and the fan doesn't work too.
> I'm really not familiar with the electronic so I don't know what can be
> happened inverting the plus with the minus...
> Is there any hope to bring back to life my USRP? Can the fuse have saved
> the board?
> Any help will be very happreciated.
> 
> Thank you,
> Marco

The fuse might have saved it.  Try replacing it.  It's a 3 amp fuse, size 0603.

Eric