GTA02 GPS rework for SD card interference issue

[Joachim Steiger]

Michele Renda wrote:
> Thank you Tony. You did a very great work and you putted me to love more
> this phone.
> 
> Only one question: which type of capacitor I have to put? I see it is
> not a electrolitic one :)

little too small for that (electrolytic) ;)

0402 is the package format. i guess all caps in that size are ceramic ones.

i used a cap from a dead gta01 board which had a job near a rtc crystal
in his earlier life.

since the only new job is eating the rf which doesn't belong there, it
seems uncritical which type it is as long as the value is somewhat in range.

>> Here is the fix:
> 
>> http://www.openmoko.org/wiki/Image:Gta02_gps_10pf_rework_sop.pdf
> 
>> This fix could give almost same performance with SD card out of case.
> 
>> But this work still not suggest do by yourself, also, this fix need 
>> proper size capacitor (10 pf with 0402 package), and some solder technique.


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Joachim Steiger
Openmoko Central Services