iPhone 6 No Sound Repair: Microphone Earphone Speakers

Sound fault is the most common in cell phone repairs, there are many chips control the sound function, so you need to be careful to avoid more malfunction during repairs. This iPhone 6 has ringtone sound when receiving calls, but the speaker icon turns grey after connection. As shown in picture 12-5-1.
 

First, we use the simplest elimination method to diagnose where the fault comes from, removing the iPhone 6 charging 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 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, all sound tests OK. U0900 position is shown in picture 12-5-2.

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 components, detect the circuit, test the block value, and basically can find the problem.

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