121 messages in org.openmoko.lists.hardwareRe: GSM-noise "buzz" issue| From | Sent On | Attachments |
|---|---|---|
| Joerg Reisenweber | Aug 5, 2008 8:23 pm | |
| Joerg Reisenweber | Aug 5, 2008 8:26 pm | |
| Joerg Reisenweber | Aug 11, 2008 5:06 am | |
| Ole Kliemann | Aug 11, 2008 9:39 am | |
| Joerg Reisenweber | Aug 12, 2008 3:54 am | |
| Candy Chou | Aug 12, 2008 4:06 am | |
| Andy Green | Aug 12, 2008 4:35 am | |
| Candy Chou | Aug 12, 2008 4:55 am | |
| steve | Aug 12, 2008 9:27 am | |
| Joerg Reisenweber | Aug 26, 2008 5:22 am | |
| Torsten Sievers | Sep 11, 2008 4:35 am | |
| Angus Ainslie | Sep 11, 2008 6:03 pm | |
| Angus Ainslie | Sep 11, 2008 6:12 pm | |
| Andy Green | Sep 12, 2008 12:27 am | |
| Joerg Reisenweber | Sep 12, 2008 6:19 pm | |
| Joerg Reisenweber | Sep 12, 2008 7:32 pm | |
| Angus Ainslie | Sep 15, 2008 8:15 pm | |
| Andy Green | Sep 16, 2008 6:23 am | |
| Angus Ainslie | Sep 16, 2008 7:24 am | |
| Joerg Reisenweber | Sep 16, 2008 2:28 pm | |
| Andy Green | Sep 17, 2008 1:41 am | |
| Joerg Reisenweber | Sep 17, 2008 8:27 am | |
| Andy Green | Sep 17, 2008 8:55 am | |
| Joerg Reisenweber | Sep 17, 2008 10:11 am | |
| Angus Ainslie | Sep 17, 2008 12:00 pm | |
| Andrew Bruno | Sep 17, 2008 1:04 pm | |
| Werner Almesberger | Sep 17, 2008 3:04 pm | |
| Joerg Reisenweber | Sep 17, 2008 5:39 pm | |
| Werner Almesberger | Sep 17, 2008 9:27 pm | |
| Torsten Sievers | Sep 17, 2008 11:00 pm | |
| Uwe Klein | Sep 18, 2008 12:54 am | |
| Andy Green | Sep 18, 2008 1:51 am | |
| Joerg Reisenweber | Sep 19, 2008 10:14 am | |
| Werner Almesberger | Sep 19, 2008 10:58 am | |
| Joerg Reisenweber | Sep 19, 2008 11:17 am | |
| Joerg Reisenweber | Sep 19, 2008 11:35 am | |
| Werner Almesberger | Sep 19, 2008 12:41 pm | |
| Florian Zeitz | Sep 19, 2008 1:23 pm | |
| Werner Almesberger | Sep 19, 2008 1:56 pm | |
| Esben Stien | Sep 19, 2008 2:22 pm | |
| Joerg Reisenweber | Sep 20, 2008 8:33 am | |
| Andy Green | Sep 20, 2008 8:35 am | |
| Joerg Reisenweber | Sep 20, 2008 9:00 am | |
| Andy Green | Sep 20, 2008 9:07 am | |
| Werner Almesberger | Sep 20, 2008 1:13 pm | |
| Werner Almesberger | Sep 20, 2008 1:19 pm | |
| Werner Almesberger | Sep 20, 2008 1:31 pm | |
| Joerg Reisenweber | Sep 20, 2008 2:15 pm | |
| Werner Almesberger | Sep 20, 2008 2:45 pm | |
| Joerg Reisenweber | Sep 20, 2008 3:10 pm | |
| Werner Almesberger | Sep 20, 2008 5:54 pm | |
| Andy Green | Sep 21, 2008 1:13 am | |
| Uwe Klein | Sep 21, 2008 1:47 am | |
| Andy Green | Sep 21, 2008 2:10 am | |
| Uwe Klein | Sep 21, 2008 2:27 am | |
| Andy Green | Sep 21, 2008 2:41 am | |
| Werner Almesberger | Sep 21, 2008 6:29 am | |
| Uwe Klein | Sep 21, 2008 6:36 am | |
| Werner Almesberger | Sep 21, 2008 7:18 am | |
| Werner Almesberger | Sep 21, 2008 7:22 am | |
| Joerg Reisenweber | Sep 21, 2008 3:18 pm | |
| Joerg Reisenweber | Sep 21, 2008 3:55 pm | |
| Joerg Reisenweber | Sep 21, 2008 4:33 pm | |
| Joerg Reisenweber | Sep 21, 2008 4:42 pm | |
| Werner Almesberger | Sep 21, 2008 4:51 pm | |
| Joerg Reisenweber | Sep 21, 2008 6:08 pm | |
| Torsten Sievers | Sep 21, 2008 11:32 pm | |
| 54 later messages | ||
| Subject: | Re: GSM-noise "buzz" issue | |
|---|---|---|
| From: | Angus Ainslie (angu...@gmail.com) | |
| Date: | Sep 15, 2008 8:15:12 pm | |
| List: | org.openmoko.lists.hardware | |
On Fri, Sep 12, 2008 at 7:20 PM, Joerg Reisenweber <joe...@openmoko.org>wrote:
Am Fr 12. September 2008 schrieb Andy Green:
Somebody in the thread at some point said:
| Even thought this is not not a recommended rework I started on it. I | (wrongly) assumed by just removing the connector that it would fix the | noise issue. It doesn't.
Wow, interesting.
Can you describe what you did to make the "noise" come? Is this the GSM "buzz" type noise or something else?
Yes Angus, please be more verbose on your findings! Until now all our results mean we don't see any noise at all, as soon as there's not even 2mm of wire on pin4 of JK4401. :-/ (leave allone beads etc)
So if you removed headset-receptacle JK4401 from PCB, didn't add any other "antenna" on pin 4, and still hear GSM-buzz-noise on far end(!), I'd really like to see/understand this setup!
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.
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.
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 ?
Angus
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