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Asked
Mic not working after dock connector replacement
I was having issues with in-app sound, basically seemed like the phone always was in "dock-mode", so I wouldn't be able to play sound from apps through the speakers. I did restores/resets
So.. I bought a new dock connector, and replaced it. I switched over the rubber microphone piece when I did the install. The new connector seemed like a success at first, the phone charged, played sound, did everything just find, UNTIL I made my first phone call and the person on the other side could not hear me.
I thought maybe the rubber thing wasn't positioned well, so I took it off and made a call without it on. It worked just fine. I thought "Great, it was just the rubber thing out of line."
I reinstalled, making sure I was very careful about the placement of the rubber mic piece. Made a call-no mic.
I have since tried it on/off, wiggled, cleaned, etc. and I am getting NOTHING from the mic.
Am I missing something or was this dock connector just bad?
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Craig
615
Answered
Sounds like the mic boot or the boot holder is clogged with debris or the bottom mesh is clogged. The mic worked when sound could get in around the black plastic mic boot holder. I have fixed several with this problem usually construction workers who get alot on dust and debris flying around.
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Answered
I've got the same problem before and after replacing a dock connector for a coworker. He didn't stick around or share the pass-code for me to test so I didn't know about the mic problem until he returned complaining about it a short while later. He couldn't leave the phone with me and didn't have the time for me to take a look, but I found people reporting DOA (dead on arrival) mics online and figured that we'd get another replacement to try again.
Anyway, rather than just swapping them out a few times like I've seen some do, I'm going to do my best to make sure it's a bad part and not an installation issue.
First, there were some minor differences in the replacement part. I'm not talking about a lack of epoxy over SMT components or no Kapton tape over the screw or no rubber bits in various places; I'm saying that there were differences in the traces and such. One example: The original had a bit of that conductive grounding fabric stuck on a grounding plane on the flex cable where it folds around the side, bridging it to the the frame of the phone. The replacement didn't have a grounding plane on the flex cable to transfer it to. I'm guessing the design was revised at some point. Other possible issues: There was adhesive holding the original microphone in the rubber boot. The replacement seemingly had none. Now I wonder if I simply didn't notice that it did have some with a tiny bit of backing film that wasn't removed. Alternatively, some of the previous adhesive may have remained inside the boot and may have folded over the hole during removal/inserti
Strangely, though speakerphone uses the secondary/noise-canceling mic, voice recorder does not. Is this a change from iPhone 4 behavior?
Edit: Another possibility: The finger that contacts the back panel that is secured by one of the two screws that holds down the battery connector was broken off by whoever did a previous repair. I doubt it's relevant, but perhaps some circuit is not complete without at least one of those two ground connections.
Edited by: Julian Turner ( )
