The iPhone 6 Plus touch is not operating, becuase it does not reaction to the touch, how to repair it?
First, we strive to repair it via changing iPhone touch screen. Use telephone open equipment to disassemble the iPhone, take away the iPhone show meeting, after which set up the brand new iPhone show meeting. After substitute, energy on iPhone and take a look at the iPhone touch screen, it is nonetheless not operating.
Now, we want to take a look at iPhone motherboard. The backside of the UMT board is straightforward to disconnect, first we want to deal with the iPhone touch error. There are 2 tactics to take away the IC: one is take away it via tweezers; the opposite one is pry it from the aspect the IC.
Remove the iPhone touch IC and the re-install it, the iPhone 6 Plus auto restarts when the white Apple seems. Measure the iPhone via DC energy provide, the boot present jumps from 300mA.
Take off the iPhone touch IC once more to measure the resistance of the ground of the board via virtual multimeter, the resistance worth measured is customary.
We did not meet this drawback prior to, what is the actual drawback? Because the boot present is bigger than customary worth, so we’re going to measure the boot present after taking out the U2 IC, however the issue nonetheless there. Measure the resistance worth of the ground pin of the iPhone U2 IC, we discovered the F4 pin PP3.0V is brief circuit.
After take a look at iPhone schematic diagram by way of WUXINJI Dongle, we all know that this circuit has large energy, fingerprint energy provide and U5411_RF.
Supply energy to the iPhone to boot it once more, we discovered the U5411_RF is overheating, take away the 2 elements that subsequent to the U2, the iPhone is became on, we showed that this iPhone drawback is led to via broken U5411.
The iPhone boot present jumps from 300mA, the iPhone presentations white Apple and would possibly not input the iOS machine. Installing the iPhone touch IC, the brand new faults comes out after checking out, the iPhone has no provider and no IMEI after booting.
For this drop-damaged UMT motherboard baseband failure, take away the iPhone baseband CPU, and use QUICK 861DW sizzling air remodel station to solder the jumper twine to V1 and U1.
After soldering thejumper twine, solidified it via portray inexperienced UV oil, after which reballing the tin at the iPhone baseband CPU.
Now, set up the iPhone, press the iPhone energy button, after coming into the IOS, touch the iPhone touch screen, now it reponses easily.