WTF APM?

Could someone PLEASE explain this one to me!

I plug the APM in, boot goes as normal, but green led stays on. Nothing will work except CLI.

I then touch the 6 pin connector (the one going from the red board to the blue) (AVR-ISP) see attached picture.

Then everything works fine.

 

Why on earth is this???

Iv attached a picture of the pins i touch to get it to work.

 

Heres a link to a video of the whole process: http://www.youtube.com/watch?v=sgMyoabBIgA

 

 

P.S. I dont have to touch all the pins, if i just touch the top left one (as seen in attached picture),

then it works...

 

If i only have to touch one pin would it not suggest a grounding problem?

 

Help me guys!!! :))))))

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DeveloperPermalink Reply by jasonshort on July 6, 2011 at 2:06pm

That top left pin is ground. Methinks you have a bad solder joint causing noise on the board. Please retouch your solder joints on those pins.

Jason

Permalink Reply by Gareth Rens on July 7, 2011 at 5:58am

Hi Jason, thanks for the reply.

The first thing i did after discovering the problem, was re-solder all 12 joints & check continuity.

It made no difference.

 

I dont think its a grounding problem either, if i bridge ground to the pin from either the USB connector or even the telemetry connecter, nothing happens. Only when i touch the pin with my finger does it work...

 

*confused*


3D RoboticsPermalink Reply by Chris Anderson on July 7, 2011 at 6:32am
I suggest you contact the customer support from the store you bought it from.
Permalink Reply by Gareth Rens on July 7, 2011 at 8:52am

What do you think the problem is? Faulty cap or ic?

 

 


3D RoboticsPermalink Reply by Chris Anderson on July 7, 2011 at 9:06am
Not sure; I'm not a hardware expert. But the customer support folks should be able to help.
Permalink Reply by Gareth Rens on July 7, 2011 at 9:30am
help in what way? replacement?

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