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Troubleshoot: iPhone 7 camera failure (shaking)

Here is an iPhone 7 with camera failure, it will shake when take photos. As we know, the iPhone camera issue is very common,  and it could be caused by many reasons. Now we are going to troubleshoot this failure.

Firstly, we tried some software solutions:

- Restart iPhone 7
- Update IOS system
- Restore iPhone 7

But none of them works. Now we need to test the iPhone camera. Put a magnet to the area of the iPhone rear camera ring, the iPhone rear camera stop shaking, when we remove the magnet, it shakes again. Therefore, we suspect it's the problem the iPhone camera circuit.

Disassemble the iPhone 7. Use qianli 3D screwdriver and screen sucker open the iPhone 7 screen, remove the iPhone 7 display assembly, disconnect the iPhone battery, and the take out the iPhone motherboard.

Measuring the iPhone rear camera connector J4501 with digital multimeter, when measure the Pin 16, the diode data is 0, while the normal data should be around 600, so it's abnormal, the circuits related to Pin 16 is short-circuited.

Check iPhone 7 bitmap to find the circuits related to Pin 16, there are several filter capacitors on this circuit.

Put iPhone motherboard under a Trinocular Stereo Microscope, it looks good, no water damage marks or deformed. Now use hot air gun to smoke the rosin to components on this circuit, and then connect the iPhone motherboard to a DC power supply.




Use DC power supply lead probe needle pen to the motherboard, after testing, the rosin on C2519 melts quickly, the C2519 is the faulty part.

Because C2519 is a filter capacitor, we can remove it directly, use QUICK 861DW hot air gun and tweezers to remove C2519. Clean the iPhone motherboard, and then use Fluke 17B+ digital multimeter to measure the iPhone motherboard again, now the data measured is normal.

So now we can assemble the iPhone 7, turn on the camera to take pictures, and the iPhone rear camera works perfectly, no more shaking.

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