Microphone busted after buzz-fix

[Rafael Campos]

On Mon, Jun 15, 2009 at 9:43 AM, Michele Renda<michele.renda at gmail.com> wrote:
> Tomas Riveros Schober ha scritto:
>> Hello List,
>>
>> I have 2 freerunners and both were A5's. I have a friend that is
>> experienced soldering and doing reworks and he performed the buzz-fix on
>> both freerunners. However, one of those seems to have the microphone not
>>   working anymore. The other Neo was fixed correctly (despite having
>> different resistors or whatever, the interference was reduced a lot).
>>
>>
> Hello, yesterday, in a Buzz fix party in Milan, it happen something very
> similar to this.
> One Freerunner was fixed, but the mic was busted.
We had some of those at fix-party in Barcelona (first Fix party). As
you are doing the fix in a hurry, you could short-circuit some of the
small R's. But we didn't bork any Freerunner. LAter, on the "lab", we
checked the phones and they get fixed, adn works perfectly.

Check the circuit diagram carefully and you see a short circuit (i'm sure).
>
> Luckily it was a test unit used for test by Eshopen.
>
> Another point is that the fix was tried with a traditional solder, not
> with a microscope soldier, so we think that this was the cause.
>
> I suggest who want to try the fix to take a lot of care, and to search
> for an specialist center. Thank again to Eshopen for its help to help us
> in fixing our Openmoko.
>
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Greetings

-- 
___________
Rafael Campos
o0 Methril 0o
http://openblog.methril.net/