Wednesday, October 24, 2018

iPhone 7 Plus Audio / Sound problem

iPhone 7 and 7 Plus having audio or sound problem isn't rare.

When Audio IC is not working properly.
Symptoms:
  • Unable to record voice
  • Other party can't hear you while calling
  • Very slow boot up Apple Logo
  • Phone is lagging and slow
  • No Sound
  • You might still have ringtone
One of it or some of those.. Or  you have all the symptoms above, it can be consider LAST stage of audio "cancer".

In iPhone repair community, we called it iPhone 7 Audio IC Disease. 

iPhone 7 Sound Problem
Go to VOICE MEMO and click record
iOS 12 would show this message - Recording Failed. No Audio Device Found.



We made a video and how to repair this issue. 





Why it happened?
Answer: Drop it too hard, or bend.. One of the solder pad below the Audio chipset is broken. Not your fault. It's their design problem and they didn't expect it. Don't worry, it can be fixed permanently.



"Advise: DO NOT send to normal shop repair this issue. The audio ic is located behind Baseband and CPU. You don't want the they ended up to tell you now got another problem or became a brick which totally unable to POWER ON. 
Of so many cases that i repaired their failed attempted job. They "accidentally" overheated the components around. They either caused the iPhone became No Service (Baseband shorted) or unable to power on (CPU shorted).

Ended up at higher cost repair and time wasted."
This photo is an iPhone 7 Plus. The smaller iPhone 7 also has same flaw.



Let's take off the IC and look closer with microscope



iphone 7 c12
99% of audio disease is because of this pad broken. Even it's not missing, we MUST still need to build new track for it. I saw a lot technician didn't rebuild this track and the customer keep coming back with same problem.

Technical term of this method is called "jumper".
Jumper it to the Resistor R1103


C12 - I2S_AP_TO_CODEC_MCLK
This is very important line that would cause totally malfunction of audio codec.
It controls microphone, and sound codec. You might still have ringtone working but no sound when calling.


iPhone 7 Plus audio ic repair
So this is the fix that must be apply before we put Audio IC back


iPhone 7 audio sound ic repair
We still can see the green PCB glue on that area after repaired.
If this iPhone suffer seriously fall damage again, it would still working fine.
The screen should be broken first before this problem reoccur.

Don't worry. This same issue
we have permanent fix method. We'll cover you this problem for 1 year if it happen again. 



Done!
It can be done in 2 to 4 hours between. Make appointment with us.