The data cable interface has poor oxidative corrosion contact
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There are 8 pins on each side of the Lightning data cable, of which the fourth and eighth pins on each side (plug outward) are 5V and GND respectively, and these two pins are the key to charging.
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Data cable charging interface
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If the gold fingers of the 5V and GND pins are covered by foreign bodies or oxidized or corroded, it will cause poor contact during charging when the data line is connected.
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At this time, you can focus on the two pins of 5V and GND, if there is an oxide on the pin, you can use an eraser to clean up, and then try to charge.
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Interface oxidation contact is poor
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2. Abnormal charging port
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In the process of long-term use, the charging port will enter a lot of dust and dirt, which will block the charging port over time, resulting in the data line can not be fully inserted, which can be dealt with with professional cleaning tools.
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Abnormal charging port
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Water will also cause the charging port corrosion short circuit, then we have to go to a professional maintenance shop to let the master replace the tail plug and tail plug line.
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Charging port corrosion short circuit
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Third, the problem of the data line itself
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1. The Lightning interface IC of the data cable does not work properly, and the data cable is damaged. Replace it directly.
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2. There is a problem of virtual welding between the Lightning interface of the data cable and the PCB board under the gold finger, and the data cable is damaged and replaced.
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3. The data cable used is a copycat, so the probability of this problem is very high. For MFI-certified Lightning data cable, Apple will provide MFI-certified chip, which can ensure that the data cable can still be used normally after the device system upgrade.
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The non-MFI certified data cable may not be recognized after the iPhone and iPad system upgrade, and some even charging functions will not be supported. In addition, the chip provided by Apple can ensure the stable output when charging, and it is also a protection for the device itself, so it is still recommended to use the replacement of the original data cable to charge.
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Non-original data cable
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Fourth, caused by high temperature
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Caused by high ambient temperature and heat, this time you can wait for the temperature to decrease before charging. You are advised to close applications running in the background during charging to avoid temperature rise when the phone power consumption is high.
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Five, USB management chip
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One side can be charged, indicating that the USB IC has detected the data cable inserted. However, one side cannot be charged, indicating that there is a problem with USB data transmission. You can directly replace the USB management chip, or detect the working conditions of the USB management chip and whether the connected components are normal to find the root of the problem.
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Under normal circumstances, the USB management chip motherboard A3 pin is broken, and the USB management chip can be reinstalled at the fly line repair point.
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Six, tail plug connecting seat
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Check whether the resistance value of the multimeter tail socket is normal. You can directly replace the tail socket.
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The tail pin 19 is easy to break, and ACC1 and ACC2 are particularly prone to problems. DP2P and DP2N are USB chip and Apple certified communication on the charging line, the same principle DP1P and DP1N disconnection will also appear the same fault.
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The above is for you to introduce the Apple charging cable has a solution that does not charge, according to the maintenance principle of easy after difficult, first exclude the external hardware to the motherboard, it is easy to find the fault