We are going to fix an faulty iPhone 6 today, customer reflects the fingerprint of his iPhone 6 fingerprint got unresponsive, after recovery, the phone reports error 53 and unable to reboot again.
Disassemble the iPhone 6 device and use DC power supply to test, when power on the iPhone 6 (click the power button moment), the current value reaches 200-250MA.
The current value of normal iPhone should be around 50-60 Ma.
It is obvious that there is a leakage of electricity. Leakage and fingerprint failure, it can be preliminarly judged that the fingerprint part has electric leakage phenomenon, resulting in fingerprint failure.
And for the error 53. First, measure the 2 power supply of fingerprint. 3.0V voltage is measured low. The value is very close to short circuit!
So it can be judged the problem is 3.0V short-circuit, which caused by low power 3.0V on fingerprint so that it would get unresponsive, for error 53, now we know the circuit is short, of course the rosin is required ( Apply rosin to smoke the relevant parts into white, then add the voltage on the short-circuit part, voltage was gradually increased (do not exceed the nominal value of 3.0V) until the right part gets heated and turns into different color because large current, then replace a new one to solve the problem)
After the components get into white, add the voltage in the right hand side of the second pin(the negative pole of Fluke 15B+ Digital Multimeter connects ground first, use positive pole to clip a sharp meter pen, and touch the short-circuit part by the pen, adust the voltage from 0.8V gradually increased until the short part gets heating and changes color), you can observe more carefully by phone repair Trinocular Stereo microscope or magnifying glass.
Open the WUXINJI dongle to check the location map is C2132, then check the capacitor C2134 principle diagram, we can see the part changes color is the bypass capacitor of capacitance PP3V0_MESA fingerprint power supply, the capacitor short-circuit is resulting in abnormal PP3V0_MESA, so this caused fingerprint and boot failure, error 53, after removing the several capacitors, the troubles are finally solved!
More professional cell phone repair information read on www.vipfixphone.com
Disassemble the iPhone 6 device and use DC power supply to test, when power on the iPhone 6 (click the power button moment), the current value reaches 200-250MA.
The current value of normal iPhone should be around 50-60 Ma.
It is obvious that there is a leakage of electricity. Leakage and fingerprint failure, it can be preliminarly judged that the fingerprint part has electric leakage phenomenon, resulting in fingerprint failure.
And for the error 53. First, measure the 2 power supply of fingerprint. 3.0V voltage is measured low. The value is very close to short circuit!
So it can be judged the problem is 3.0V short-circuit, which caused by low power 3.0V on fingerprint so that it would get unresponsive, for error 53, now we know the circuit is short, of course the rosin is required ( Apply rosin to smoke the relevant parts into white, then add the voltage on the short-circuit part, voltage was gradually increased (do not exceed the nominal value of 3.0V) until the right part gets heated and turns into different color because large current, then replace a new one to solve the problem)
After the components get into white, add the voltage in the right hand side of the second pin(the negative pole of Fluke 15B+ Digital Multimeter connects ground first, use positive pole to clip a sharp meter pen, and touch the short-circuit part by the pen, adust the voltage from 0.8V gradually increased until the short part gets heating and changes color), you can observe more carefully by phone repair Trinocular Stereo microscope or magnifying glass.
Open the WUXINJI dongle to check the location map is C2132, then check the capacitor C2134 principle diagram, we can see the part changes color is the bypass capacitor of capacitance PP3V0_MESA fingerprint power supply, the capacitor short-circuit is resulting in abnormal PP3V0_MESA, so this caused fingerprint and boot failure, error 53, after removing the several capacitors, the troubles are finally solved!
More professional cell phone repair information read on www.vipfixphone.com
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