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Información y guías de reparación del iPhone 8 que salió a la venta el 22 de septiembre de 2017. Modelo: A1863, A1905

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Lightning connector and flat replaced but now a noise on the mic

Hi all. A store replaced my lightning connector+flat from my iPhone cause the original stopped to charge. After this all recorded sounds on whatsapp, voice memos, facebook and phone calls using the regular cell phone and whatsapp audio are generating a noise on the background of the audio. Using the headphone/mic from Apple nothing is recorded. Recording videos using the front and rear camera, the noise is not recording. Only on what I described.

You can hear the noise on a voice memo on a YouTube video that I did. The first audio is the original recorded. The second on the video I just amplified for better hearing.
https://www.youtube.com/watch?v=yTMM3haK...

Any idea of the problem? Thanks.

Update (10/13/2022)

@strongbow I tried to clean the grills, but I think the correct possibility is the "1". Cause I can try to use the iphone near from my face, on the normal position, without touch the sensor with the screen on and the sound is horrible. The answering machine here when I call to test turn off due the sound so low.

The audio message created on the whatsapp before the replacement has a good waveform but after the replacement is horrible. Here is the screenshot.

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Contesta esta pregunta Yo también tengo este problema

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Take it back, not sure what you mean by flat but if it was all working before it's up to them to fix their mistakes.

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flat I mean because the lightning connector has the connector, flat membrane/cable....

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That's all one part

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Have to agree with @strongbow, the replacement lightning connector they put on appears to have one or more bad microphone(s) on it. You've got three microphones in your iPhone 8; two lower ones on the charging flex and an upper one on the flash/button assembly.

The lower ones are used for phone calls and apparently whatsapp, facebook (do you mean facetime?) and voice memos, while videos you record use the upper microphone. So yeah one of the mics on the replacement flex is bad. You'll need to take it back and have them replace it.

Edit: 10/13/2022

Well, we haven't had much luck in making progress after you got the first bad lighting connector replaced. If this was my phone, I would think its time I opened it up and checked the repair shop's work, specifically looking at the two microphones on the lightning connector, as marked in the photo below.

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I'd suggest following the lightning connector assembly replacement guide up to Step 32, then skip the logic board removal part and jump to Step 52 and 52 to take out the speaker.

iPhone 8 Lightning Connector Assembly Replacement - iFixit Repair Guide

At this point both microphones are accessible and you can check them for being in the proper position and possibly peel them back to make sure the vents are clear and the grills aren't clogged; you should be able to see a bright light through them.

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@dadibrokeit @strongbow the lightning was replaced for a new one and now I have this:

Voice memos, Whatsapp/Messenger/Instagram audio voice messages are working. The problem now is only during the phone calls. If using the cell to call to someone, not using whatsapp call I mean the cell phone, my voice is very very low and fails sometimes. I did a test doing a call to my phone home and used the answering machine and the voice recorded sucks.
So I did a test. During the phone call if I turn the speaker on, my voice goes perfect. The voice recorded on the answering was clear. I did a phone call to and everyone listened me.
So, what is the problem now? Maybe a random bug the Apple create for 3rd party replacements connectors? Thanks

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I don't have an answer, but I seem to recall that the upper microphone is used for noise cancellation, so I have to wonder if there's something going on with that.

Possibly a bad upper microphone as well? Does it record correctly when making videos? Or maybe something to do with the proximity sensor; I would imagine the noise cancellation would change in some fashion when it detects your face next to the phone indicating you're holding it up to your ear.

Anybody got more information on this? @strongbow?

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@dadibrokeit I have tried talk far away from my ear with the screen on. Same problem. Tried to put on 90 degrees to talk directly to the mic, bad sound too. Tried to put my finger on the sensor to recognize my face but the sound is so slow and unstable that the answering machine stop the call. Video using rear and front cameras has good audio.

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@dadibrokeit as I can see, using the phone on the ear, the mic is not capturing well. When you use voice memos, you talk more directly to the mic, so the sound has a good hearing. I tried a phone call and whatsapp call and sound captured on the mic was horrible. But dunno about how noise reduction can influence on that.

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@spawnerbr @dadibrokeit Two suggestions.

1, the shop hasn't lined the microphone up properly inside the phone.

2, the grills on the bottom of the phone are full of dirt. Use a old toothbrush and gently clean them until they are clear.

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@strongbow @dadibrokeit I tried to clean the grills, but I think the correct possibility is the "1". Cause I can use the iphone near from my face, on the normal position, without touch the sensor, with the screen on, and the sound is horrible too. The answering machine here when I call to test turns off due the sound so low.

The audio message created on the whatsapp before the replacement has a good waveform but after the replacement is horrible, 1/3 of previously wave size.

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