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[Paparazzi-devel] Re: Blown power supply?

From: Paul Cox
Subject: [Paparazzi-devel] Re: Blown power supply?
Date: Sun, 22 Mar 2009 19:45:30 -0700

First figure out how a short could have happened and find the source, otherwise replacing isn't going to fix things for long. But definitely switch out the module. I blew mine up when I hooked up my ESC without first pulling the power pin from the connector. Smoke billowed out. Replacing the power module got me back fully operational. Was not easy to replace the module but can be done with patience and brute force :-)

Date: Sun, 22 Mar 2009 13:16:32 +0100
From: Jesper Kempe <address@hidden>
Subject: [Paparazzi-devel] Blown power supply?
To: address@hidden
Content-Type: text/plain; charset="iso-8859-1"

Hi All

Yesterday I finally managed to fix my airplane after my last incident and
began to reinstall the Tiny.
When everything was connected and I had wrapped the board in some foam I
thought I should test everything before the final installation. I had
everything tested OK outside of the plane the day before. But this time when
I connected the battery a very bad sound was heard from the Tiny. It sounded
like a very bad short cut!
I immediately disconnected the battery and tried to see if anything was
burnt but I cannot find anything that looks broken. I tried one more time to
connect the battery but this time nothing happens. The thing is dead! :-(

After I while I decide to try to locate the fault. I think it looks now like
the power supply, the PTH08080WAH module, is broken. When there is power
connected to it it does not give me +5V on the output pin. I should be able
to just measure on the output pin against ground, right?

The question for you guys now is if it possible to change that module?
Of course it is possible but I mean more if you think it possible that the
rest of Tiny has survived and that the module is the only thing broken? Is
it worth a try?


Still on the ground...

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