diyphonetool的部落格

After experiencing so many phone fault, we have already recorded too many case in our notebook. 

During we accumulated, we found the audio fault happens frequently in recent, so we found these case to share the repair experience with you guys.

For the audio part which was controlled directly by driver IC, we still will choose wuxinji diagram comparing with the number which we will get after we testing. Following the 4 case for audio fault.

1. No voice when calling

When you are talking to someone on your iPhone 7 or iPhone 7 Plus, you don't hear any voice. In this case, first you need to test the iPhone recording function to check whether it works normally. 

If the recording function is normal, but the call is abnormal, then the problem is basically in the iPhone baseband part. In order to repair it, put your iPhone on the WL Aluminum Alloy Pad, and then you need to disassemble the iPhone by phone opening tools, remove the iPhone motherboard. Take off the iPhone baseband CPU, and then re-install it. 

If the recording function is abnormal, then the problem is basically in the audio decoding part. In order to repair it, you can re-install audio decoding or replace the new one.

2. The other party could not hear my voice during the call

When you receive or make the phone calls on your iPhone 7 or iPhone 7 Plus, you can hear the voice from the other person, but the other person can't hear your voice, whether in normal call mode or hands-free call mode, the problem is the same. 

In this case, you need to replace the iPhone Tail plug Flex Cable, reinstall or replace the iPhone audio decoding.

3. No voice when recording

When you use iPhone recording function, there is no voice, and then you need to replace the iPhone Switch Power Flex Cable.

4. No voice on receiver

If there is no voice when you use receiver, then you can replace the new receiver or receiver flex cable, re-install or welding audio decoding by QUICK 861DW hot air rework station. 

It confirms what we have said, not all of the same fault was caused by the same fault sources. It needs your checking patiently. Hope what we shared can be useful for your understanding about phone repair.