[USRP-users] N200 seems totally dead

Juha Vierinen x at mit.edu
Wed Apr 17 07:12:25 EDT 2013


Have you tried another power supply with the usrp?

We just had one usrp n210 die on us. We traced it down to a failing power
supply (the usrp was a few years old). It couldn't supply the needed 3 amps
any more. When we opened up the supply, we found an expanded capacitor.

juha


On Wed, Apr 17, 2013 at 10:36 AM, Sivan Toledo <stoledo at tau.ac.il> wrote:

> Measuring the voltages at the outputs of the regulators showed that the
> 3.3V regulation is broken. The voltage at J104 is only 1V, not 3.3V. The
> 1.2V and 2.5V  outputs seem fine.
>
>
> On Wed, Apr 17, 2013 at 12:25 PM, Sivan Toledo <stoledo at tau.ac.il> wrote:
>
>> One of our N200 seems to have died suddenly. It was working fine and then
>> the UHD program we were running complained about being unable to send
>> control packets, we did not get any more samples, and our program exited.
>>
>> We tried to power cycle the N200 by removing the power adapter and
>> plugging it back in, but it did not turn on properly. None of the 6 LEDs
>> lights. The orange LED in the Ethernet connector lights when a cable is
>> plugged it, but that's it. The fan runs.
>>
>> We tried to power cycle it a few more times but always got the same
>> result. We tried to plug in power while S2 is pressed, but the LEDs are
>> still all off.
>>
>> The unit was not in the middle of any kind of firmware/image update, just
>> running normally against a UHD program.
>>
>> Any advice on what to do next would be appreciated.
>>
>> Thanks, Sivan
>>
>>
>>
>>
>>
>>
>
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