How to solve the iphone 6 power consumption fast fever serious

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Trouble Phenomenon

IPhone 6 has high electricity consumption and high temperature when charged and used.  It displays horizontal direction of pictures while viewing pictures occasionally.

Repair Process

Connect iPhone to DC power and enter system after power on. Then test it under the state of screen off. The working current keeps about 250mA, as shown in picture 2-45. That working current keeps about 250mA is abnormal.


Continue to test every function and find the compass cannot be used, as shown in picture 2-46.



Remove the motherboard and measure the power supply diode data of compass chip, finding PP3V0_IMU is short circuit, as shown in picture 2-47.

Picture 2-47

Analyze when contrast the situation with circuit diagram and find there are several filter capacitors on the circuit of PP3V0_IMU voltage. As to this kind of problem, first we exclude the capacitors, so remove these capacitors one by one. After removing capacitor C1902 (picture 2-48), the voltage of PP3V0_IMU becomes normal. The circuit diagram of C1902 is shown in picture 2-49.
 
Picture 2-48

Picture 2-49

Find a same capacitor on fitting material pad to replace the old one and turn on to test. The working current under the state of screen off becomes normal, as shown in picture 2-50.


Test compass function in the system again and everything becomes normal, as shown in picture 2-51. Trouble is removed.

Picture 2-51

Chapter 3  Display Screen and Touch Problems
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