[USRP-users] N200 seems totally dead

Sivan Toledo stoledo at tau.ac.il
Wed Apr 17 07:15:06 EDT 2013


No, it's not the external power supply. I have another N200 and both power
supply work fine with the other N200, but the dead unit does not work with
any of them.


On Wed, Apr 17, 2013 at 2:12 PM, Juha Vierinen <x at mit.edu> wrote:

> 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
>>>
>>>
>>>
>>>
>>>
>>>
>>
>> _______________________________________________
>> USRP-users mailing list
>> USRP-users at lists.ettus.com
>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com
>>
>>
>
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