Am Dienstag, 14. April 2009 14:20:26 schrieb Helge Hafting: > Paul Fertser wrote: > > Helge Hafting <helge.haft...@hist.no> writes: > >> Paul wrote: > >>> Almost sounds as if you do not push the headset connector in far > >>> enough. > >> > >> I think there is something wrong with the FR headset socket. > >> I have tried several headsets as well as several converter plugs for > >> those headsets that have the bigger plugs. > >> > >> If I push the plug all the way in, I get sound in one channel only. Pull > >> it a litle out, and I get nice stereo. Pull it some more out, and I get > >> a very weak stereo. (Possibly missing the ground connection, so the two > >> channels connect in series?) Pull further out, and weird things happens, > >> sound in left only or right only, or perhaps the main speaker wakes > >> up. > > > > Looks like you're trying to use incompatible 3-ring > > adapter/headphones. Obviously that won't work. > > > > The right pinout of FR's receptable is: > > tip: MIC > > RIGHT > > LEFT > > GND > > > > If you fully push a regular 3-ring jack in the socket, you'll have MIC > > input connected to your left headphone, RIGHT output to the right > > headphone and you'll short LEFT to GND by the base of your > > jack. Obviously if you pull it a little, you'll have your left > > headphone connected to the RIGHT output, your right headphone to the > > LEFT, and a proper ground connection. > > > > Use only properly wired 4-ring jack! > > Thanks. > Do such converters exist at all though? I have been to quite a few phone > shops, showing them the 3.5mm 3-ring headset connector, as well as the > 2.5mm 4-ring earplug. (The latter works, but the headset has better bass > and is more pleasant to wear.) > > No phone shop seems to have such a connector. Of course, these people > doesn't actually seem to know that 2.5mm and 3.5mm plugs are > standardized sizes, they keep asking what brand of phone it is. :-( > > Helge Hafting
There's at least one adapter known working (I own one of them), it's an MP35A from some Hong Kong distributor, have a look at:http://wiki.openmoko.org/wiki/Headset -- Marcel _______________________________________________ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community