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現在のバージョン作成者: Julian Turner ,

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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/insertion.
Strangely, though speakerphone uses the secondary/noise-canceling mic, voice recorder does not. Is this a change from iPhone 4 behavior?
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+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.

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オリジナル投稿者: Julian Turner ,

テキスト:

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/insertion.

Strangely, though speakerphone uses the secondary/noise-canceling mic, voice recorder does not. Is this a change from iPhone 4 behavior?

ステータス:

open