[hard] Need advices
Hi everyone, I just tried to #1024fix buzzfix an A6. When testing, the mic seemed to be cut, so I removed the cap, but the mic still won't work (I can't hear anything on the other phone). Does anybody have already seen something like that ? What Could be wrong ? Do you think removing #1024fix should change something ? Thanks to every answer. AstHrO ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [hard] Need advices
On Wed, Oct 28, 2009 at 11:25 AM, Thomas HOCEDEZ thomas.hoce...@free.fr wrote: Hi everyone, I just tried to #1024fix buzzfix an A6. When testing, the mic seemed to be cut, so I removed the cap, but the mic still won't work (I can't hear anything on the other phone). Does anybody have already seen something like that ? What Could be wrong ? Do you think removing #1024fix should change something ? I've heard of shorts due to the soldering job (it is a pretty small region) causing problems liek that. I've never experienced it, but there was a post on the list a while back about it. I don't believe #1024 could cause the mic issue, as it is in the modem power supply circuit (As I understand it) Best of luck, and double check your buzzfix for shorts. Toaster ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [hard] Need advices
Am 28.10.2009 um 12:25 schrieb Thomas HOCEDEZ: Hi everyone, I just tried to #1024fix buzzfix an A6. When testing, the mic seemed to be cut, so I removed the cap, but the mic still won't work (I can't hear anything on the other phone). Does anybody have already seen something like that ? What Could be wrong ? Do you think removing #1024fix should change something ? During our professional buzz-rework initiative we had approx. 3 devices where the mic was dead after rework. Just removing all components and resoldering (new) ones did help in all cases. So I don't know exactly what the reason was (maybe no contact of a solder point or a short circuit across the capacitor), but it was possible to fix. Propability that it has something to do with the #1024 is very very low (in that case you should not even be able to use the GSM modem). Nikolaus Thanks to every answer. AstHrO ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community Mobile Office Solutions by Golden Delicious Computers GmbHCo. KG Buchenstr. 3 D-82041 Oberhaching +49-89-54290367 http://www.handheld-linux.com AG München, HRA 89571 VAT DE253626266 Komplementär: Golden Delicious Computers Verwaltungs GmbH Oberhaching, AG München, HRB 16602 Geschäftsführer: Dr. Nikolaus Schaller Digital Tools for Independent People ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
Re: [hard] Need advices
Dr. H. Nikolaus Schaller a écrit : During our professional buzz-rework initiative we had approx. 3 devices where the mic was dead after rework. Just removing all components and resoldering (new) ones did help in all cases. So I don't know exactly what the reason was (maybe no contact of a solder point or a short circuit across the capacitor), but it was possible to fix. I answer myself : this midday I was worrying about this semi-bricked FR, so I came back to home to do some extra checks. I put my efforts on the small resistor that has to be changed (the vertical one on the bottom left): - I Tried to measure it directly onboard : 0 ohm - seems to be dead. - I shorten it, then tested with a recorder app. I could hear my voice ! So It can be a way to check this one. The shorten resistor cause the recorded sound to be really loud, so I'll put a small resistor (2k) inplace. Hope this can help other people : some other cases have been reported by Bearstech (France). Thank you all for your quicks answers ! My friend will get back its FR fully fixed! P.S. : I didn't remove the 1024Fix while performing those actions. AstHrO ___ Openmoko community mailing list community@lists.openmoko.org http://lists.openmoko.org/mailman/listinfo/community
