<div dir="ltr">On Fri, Sep 12, 2008 at 7:20 PM, Joerg Reisenweber <span dir="ltr"><<a href="mailto:joerg@openmoko.org">joerg@openmoko.org</a>></span> wrote:<br><div class="gmail_quote"><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
Am Fr 12. September 2008 schrieb Andy Green:<br>
<div class="Ih2E3d">> Somebody in the thread at some point said:<br>
><br>
> | Even thought this is not not a recommended rework I started on it. I<br>
> | (wrongly) assumed by just removing the connector that it would fix the<br>
> | noise issue. It doesn't.<br>
><br>
> Wow, interesting.<br>
><br>
> Can you describe what you did to make the "noise" come? Is this the GSM<br>
> "buzz" type noise or something else?<br>
<br>
</div>Yes Angus, please be more verbose on your findings!<br>
Until now all our results mean we don't see any noise at all, as soon as<br>
there's not even 2mm of wire on pin4 of JK4401. :-/ (leave allone beads etc)<br>
<br>
So if you removed headset-receptacle JK4401 from PCB, didn't add any<br>
other "antenna" on pin 4, and still hear GSM-buzz-noise on far end(!), I'd<br>
really like to see/understand this setup!<br>
<br></blockquote><div><br>The sound I had after completely removing JK4401 was the identical GSM buzz that I had before removing the connector. I would say that it was possibly even worse than with the connector attached.<br>
<br>I didn't have the connector with me so to try and rectify my partial rework I added a short between 3 and 5 to match the closed connection in the headset plug. That fixed it. There is a very minor hiss that remains but the phone is usable for talking now.<br>
<br>I probed the connector a bit and the strip of metal up the side above pin 4 is connected to pin 4. Couldn't pin 4 be filed off. Then lean ( and solder ) the bead from the pad for pin 4 against the metal strip up the side of the connector ?<br>
<br>Angus<br><br></div></div></div>