A customer sent an iPhone 6 to us to
repair, the fault described is that the iPhone 6 rear camera sometimes won't
turn on, and there is a vertical bar when take photos. According the repair
experience, first we measure the diode data of rear camera with Fluke 15B+ Digital Multimeter.
When we measure the diode data for the 34th
pin, we found it unstable. Sometimes more than 300, sometimes more than 500
(The normal resistance is about 500). Open WUXINJI Dongle to check iPhone PCB schematic diagram, we
know that this pin is 2.85 power supply pin.
This 2.85 power supply pin is converted
from U2301.
Base on the above conclusions, we suspect
that this could be caused by a 2.85V conversion tube virtual weld. Gently shake the conversion tube with Precision
Titanium Alloy Tweezers; The conversion tube has fallen off. We
can check it under the VGA Camera 7-45X TrinocularStereo Microscope
Now, replace a new conversion tube. And
then turn on iPhone to test, now, when you turn on the camera, it won't get
stuck. The iPhone rear camera can be turned on smoothly.
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