N97 mini microphone - GSM-Forum

alfon13 · 03-15-2011, 23:21

Hellow, i have a nokia n97 mini that was wet by sea water. I have cleaned PCD and phone works fine except mic that dont work . when i try to record voice, my voice dont hear, only a bad noise like beach sound jejeje.
I think change mic but dont find it, only i find nokia 5800 mic . it´s the same?
could by the problem in other parts of pcb?
if i reheat mic, can I damage more?
please help!!

dragosgsm · 03-15-2011, 23:51

Reheating mic won't help,you must change it - 5800 one is the same, use hot air under the main board. Don't apply hot air direct on it because you can damage the microphone. Just changed 2pcs today and worked like a charm

alfon13 · 03-17-2011, 20:37

If I use air hot under the board don´t burn it?
when the mic are desoldered, how solder it? using hot under the board too? there is not anyway? I have fear to damage it!

thank you for help me!!

telecelula · 03-18-2011, 16:07

Today this new microphones is very different, the new mic have a five terminals,

Please check the pins below:

1. L",R conected to gnd?
2. CLK, check the clock signal with frequencimeter or osciloscope?
3. DATA (digital signal out to D2800).
4. VDD - check the voltage?
5. GND

After you check the signals, if you signal is ok change the mic.

BR

James

alfon13 · 03-21-2011, 23:26

thank you very very much, i´m going to check all that you say. It´s more dificult than i have think.
thanks!!

deepin · 05-04-2011, 13:10

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03-15-2011, 23:21	#1 (permalink)
alfon13 Junior Member Join Date: Feb 2010 Posts: 12 Member: 1241217 Status: Offline Thanks Meter: 1	N97 mini microphone Hellow, i have a nokia n97 mini that was wet by sea water. I have cleaned PCD and phone works fine except mic that dont work . when i try to record voice, my voice dont hear, only a bad noise like beach sound jejeje. I think change mic but dont find it, only i find nokia 5800 mic . it´s the same? could by the problem in other parts of pcb? if i reheat mic, can I damage more? please help!!

03-18-2011, 16:07	#4 (permalink)
telecelula Registered User Join Date: Mar 2006 Location: Brazil Age: 23 Posts: 27 Member: 252045 Status: Offline Thanks Meter: 7	Nokia new Microphones Today this new microphones is very different, the new mic have a five terminals, Please check the pins below: 1. L",R conected to gnd? 2. CLK, check the clock signal with frequencimeter or osciloscope? 3. DATA (digital signal out to D2800). 4. VDD - check the voltage? 5. GND After you check the signals, if you signal is ok change the mic. BR James

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03-15-2011, 23:51	#2 (permalink)
dragosgsm No Life Poster Join Date: May 2005 Location: Bacau Posts: 3,227 Member: 148032 Status: Offline Thanks Meter: 415	Reheating mic won't help,you must change it - 5800 one is the same, use hot air under the main board. Don't apply hot air direct on it because you can damage the microphone. Just changed 2pcs today and worked like a charm

03-17-2011, 20:37	#3 (permalink)
alfon13 Junior Member Join Date: Feb 2010 Posts: 12 Member: 1241217 Status: Offline Thanks Meter: 1	If I use air hot under the board don´t burn it? when the mic are desoldered, how solder it? using hot under the board too? there is not anyway? I have fear to damage it! thank you for help me!!

03-21-2011, 23:26	#5 (permalink)
alfon13 Junior Member Join Date: Feb 2010 Posts: 12 Member: 1241217 Status: Offline Thanks Meter: 1	thank you very very much, i´m going to check all that you say. It´s more dificult than i have think. thanks!!

05-04-2011, 13:10	#6 (permalink)
deepin Freak Poster Join Date: Mar 2008 Location: oman Age: 41 Posts: 122 Member: 728300 Status: Offline Thanks Meter: 18	MEGAUPLOAD - The leading online storage and file delivery service