another method for filter rework
zero-kelvin at gmx.de
Wed Jan 23 18:13:08 UTC 2013
> i would like to try other way for same
I did it several times with a soldering iron. I have twisted a wire
around the iron to get a second, much sharper tip. I also sharpend the
end of the wire. With a soldering iron tuned like that i soldered the
components under a stereo lens basically like normal components. I know
this method is a bit extreme but i am not familiar with hot air ;-)
You also should use flux. I have liquid one that sucks itself under the
components. Its called FL 88 FLUXI. I am very happy with that.
A multimeter is not the right tool for testing for shorts. It sends a
current through the parts. As the parts are soldered into a circuit you
can not really distinguish between low impedance components and real
shorts and depending on the multimeter quality you might ruin parts. You
have no AVR here, its a very sensitive HF circuit, don't forget that. I
think you better inspect it visually using a stereo lens.
Don't worry if you ruin some phones, thats normal. I think i ruined two
phones before i could do it properly. You also should be familiar with
SMD hand-soldering otherwise you won't have a chance.
After the mod do not use the phone for transmitting anymore as you might
ruin the receiver then.
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