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Nokia Lumia 1520 ambience mic issue  

 

Balah Abdelilah
Free Subscriber France
(@rifphone)
Eminent Tech Registered
Joined:2 years  ago
Posts: 42
28/07/2016 01:31  

Hi,

A common issue on Lumia 1520, only appears during call, the interlocutor cannot hear the voice, only works when speaker activated. I think it's the same issue like on Iphone 4 (ambience noise ic U62).

I have tried all software solution, hard reset, update, downgrade etc ... No change.

I conclude hardware issue. I replace audio codec , the same.

Any ideas?

Thx 


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iTesla
iOracle Moldova
(@idea)
SUPPORT Admin
Joined:5 years  ago
Posts: 7211
28/07/2016 03:49  
Posted by: Balah Abdelilah

 

Hi,

A common issue on Lumia 1520, only appears during call, the interlocutor cannot hear the voice, only works when speaker activated. I think it's the same issue like on Iphone 4 (ambience noise ic U62).

I have tried all software solution, hard reset, update, downgrade etc ... No change.

I conclude hardware issue. I replace audio codec , the same.

Any ideas?

Thx 

   

Yes possible i will look for the schematic and let you know what i find.

Do not wait that i feed you with the tea spoon, the site is full of info have patience searching and reading because this is the great way to learn from others.


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iTesla
iOracle Moldova
(@idea)
SUPPORT Admin
Joined:5 years  ago
Posts: 7211
28/07/2016 19:05  

Did you try replacing mic,how much mic's are in this model?

If there are more mic's possible it is used different mic depending of what is switched during call.

On iPhone 4s when speaker is used during call then upper mic near HP jack is activated not bottom voice mic,from this we can understand that bottom mic is used when earspeaker is active.

Do not wait that i feed you with the tea spoon, the site is full of info have patience searching and reading because this is the great way to learn from others.


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Balah Abdelilah
Free Subscriber France
(@rifphone)
Eminent Tech Registered
Joined:2 years  ago
Posts: 42
29/07/2016 00:36  

There are 4 mics, 2 upper and 2 bottom. I have replaced those on bottom (located on a flex cable, easy to change) but no result. The 2 upper are soldered on motherboard. I don't think the issue is related to these mics themselves, because i have 2 motherboard with the same problem. I think the issue comes from an IC that used the upper mics to avoid noise during call (ambience noise IC), but i can't find it on motherboard. The dictaphone works because it uses the bootm mics. I noticed that the voice on video recording is also inhibited (maybe it used the upper mics ???). This issue is very similar as the common problem on iphone 4.

 


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iMartin
iOracle Moldova
(@imartin)
Active Tech Registered
Joined:3 years  ago
Posts: 11
29/07/2016 01:03  

heat welds microphone or change it


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iTesla
iOracle Moldova
(@idea)
SUPPORT Admin
Joined:5 years  ago
Posts: 7211
29/07/2016 02:24  

If you have schematic ic N2181 control all mic's 2 bottom use same lines and 2 upper use other lines but i can't detect in schematic for sure second mic that is located on board there is something strange in schematic it look like the other mic is attached to proximity sensor on board.

Anyway did you replaced that N2181 ic? If yes then remain to test some filters and possible replace those mic's on the board.

Test L1398,L2125 and R2152 filters are located near each mic but resistor is located near that Audio Codec N2181 test them and let me know then we look further.

Do not wait that i feed you with the tea spoon, the site is full of info have patience searching and reading because this is the great way to learn from others.


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iTesla
iOracle Moldova
(@idea)
SUPPORT Admin
Joined:5 years  ago
Posts: 7211
29/07/2016 02:26  
Posted by: iMartin

 

heat welds microphone or change it

   

He already replace those 2 mics,thanks for helping bro 😉

Do not wait that i feed you with the tea spoon, the site is full of info have patience searching and reading because this is the great way to learn from others.


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iMartin
iOracle Moldova
(@imartin)
Active Tech Registered
Joined:3 years  ago
Posts: 11
29/07/2016 11:43  

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Balah Abdelilah
Free Subscriber France
(@rifphone)
Eminent Tech Registered
Joined:2 years  ago
Posts: 42
30/07/2016 00:11  

Please can you share the shematics ?

Thx


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Balah Abdelilah
Free Subscriber France
(@rifphone)
Eminent Tech Registered
Joined:2 years  ago
Posts: 42
30/07/2016 01:02  

found schematics, i will check the filters ...

About N2181, i replaced as i noticed in my first post. It's the audio codec, with no result.

Thx


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