Re: [Paparazzi-devel] Tiny V2.11 not powering up

[Prashanth Thankachan]

Dear Prateek

Where are you measuring this 4 volt?

It is possible that the TI SMPS  PTH08080WAH on board may have failed
and is not providing power to the tiny, check the output of this SMPS,
it should be a 5volt out. In case there is no output you could inject
5V into the board at the SMPS output and see if the board Led lights
up.

Also check the output of Lm3940, if its giving 3.3 v out

Check the input wiring and the connectors for any breaks etc from the
power source

hope this helps
Prashanth



On Fri, Aug 12, 2011 at 3:52 PM, Gareth Roberts
<address@hidden> wrote:
> Hi Prateek,
>
> What is the no-load voltage of your power supply?
>
> Cheers,
> Gareth
>
> On Fri, 12 Aug 2011 11:15:18 +0100, Prateek B S <address@hidden>
> wrote:
>
>> Hi,
>>
>> *"When the Tiny V2.11 powers up, a LED glows. This LED used to glow
>>  when we connected a standard 9V battery. However the LED no longer
>>>
>>> glows. On checking with the multimeter, I found that the board is
>>> getting a voltage in the range of 4.8V to 5.2 V. Is this sufficient to
>>> power up the LED? Or is it a problem with the board or should I change
>>> the battery(use one with higher voltage rating)  and try again? We are
>>> a Paparazzi newbie team. Any help would be greatly appreciated"*
>>
>> We were advised to switch to an alternate power source with higher current
>> rating. We used a 12V adapter with 1A current rating. However, the LED is
>> still not glowing and the board is getting a voltage of around 4V. Is
>> there
>> any way to troubleshoot this board?
>
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>



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Prashanth T, PhD
St John's Research Institute
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