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Re: [Paparazzi-devel] Re: Blown power supply?

From: David Buzz Carlson
Subject: Re: [Paparazzi-devel] Re: Blown power supply?
Date: Tue, 14 Apr 2009 11:29:29 +0300
User-agent: Thunderbird (X11/20090318)

Seems the best way is to grind off the legs with a dremel and then remove them with a normal soldering iron.


Jan Nowack wrote:
Hi Jesper, hi all,
unfortunately we also have a blown power supply. And this happend on
our first flight :(.
Do you have any tips how to change, especially remove the
PTH08080WAH-Module from the tiny board? Do you have used any "special
equipment" for this?



2009/3/22 Jesper Kempe <address@hidden>:
Hi again

For information I can say that it looks like it was the power supply that
was broken. I managed to remove it  from the Tiny board and when I hook up
+5V to the output pin of the power supply module (pin 3 on the PTH08080WAH)
the Tiny comes to life and the led starts to blink. I even got a GPS fix
inside my workshop.

Now I only need to get a new module and hope that it was a bad module that
broke and that it has nothing to do with my autopilot.


2009/3/22 Jesper Kempe <address@hidden>
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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