The iPhone 6 is ringing, and then you pick up, but no voice. Check the other iPhone 6 sound, there are no voice, no earpiece and even no speakers. What's going on? We need to find out the reason and then fix it!
First of all, we use the simplest elimination method
to diagnose where the fault comes from, removing the iPhone Audio Flex Cable to check the receiver;
removing the earphone to test the speaker. After testing, there is still no
voice. It can be judged that the chip is out of order.
The iPhone 6 U0900 big audio IC damage directly
caused the 3 voice failure, it's relatively simple to disassemble and assemble
large audio chip, layer welding spot is large while the iPhone audio chip is big and
thin, so it's necessary to avoid excessive force to crush the chip during
solder reballing process. Replace U0900 chip.
U1601 small audio water damaged phone comes out
of a lot of problems, leading to large current, and there will be an automatic
phone speaker. If the reset signal given by the iPhone CPU is abnormal,
we can scrape and weld a jumper wire from the bottom of the chassis A6 track.
If the sound off and on, you can remove a small
audio chip, when there is a temperature, measure the resistance value of the
U1601 A6 track by digital multimeter.
iPhone 6 will also have a headphone mode, which
automatically enters the headset mode without the plug in the headset.
The J1817 tail plug can be tested. If the block
is normal, it will be solved by replacing the tail plug flex cable.
If there is the absence of a single sound
instead of 3, we can replace the new parts, detect the circuit or test the
block value, then basically you can find the problem.
In the end, assemble the iPhone 6 by JM-P01 Phone Repair Toolkit, and turn on it, get into the IOS to test all sound, all is fine. The repairs end!
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