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Tuesday 12 November, 2019 |

iPhone XS battery drains quickly- Hardware Repaired!

Battery drains fast is a common problem with iPhone, the iPhone XS is no exception. An iPhone XS battery drains quickly when it in standby mode, after eliminating the software issue, we need to check hardware aspect on the iPhone XS. Generally, the iPhone battery and iPhone motherboard problems are the main reasons that caused iPhone battery fast consumption.

First of all, we need to disassemble the iPhone XS. Use screwdrivers to remove the screws at the bottom of the iPhone screen, and then use other phone opening tools to open the iPhone XS screen.

We try to fix this problem by replacing the iPhone XS battery. Remove the iPhone screen, disconnect the iPhone battery, and then take out the iPhone battery.

Install a new iPhone XS battery, assemble the iPhone XS, and test it, but the problem is still the same, the iPhone XS battery still drains quickly. So it's not the problem of the iPhone XS battery, next we need to check iPhone XS motherboard.

Disassemble the iPhone XS again, remove the iPhone screen, disconnect the iPhone battery, and then take out the iPhone motherboard.

Measure the iPhone XS motherboard by DC power supply to check current, we found it leaks 300mA, and we found that this iPhone XS was repaired before, because there are traces of layering.

Put iPhone XS motherboard on the Mijing CH5 Separating station to separate the layer. After separating, we can see that the layers doens't match well.

Clean the tin on the middle layer, and then measure it, but the problem is still the same.

Observe the iPhone motherboard under a Black Trinocular Microscope, we found the problem, a capacitor blackened. Login to the ZXW online account, we know this is a filter capacitor of the iPhone main power supply PP_VDD_MAIN.

Use soldering iron to remove it directly, and then use DC power supply to measure the iPhone XS motherboard, now the current tested is normal.

Assemble the iPhone XS motherbaord layer, and then assemble the iPhone XS. Turn on the iPhone XS, all functions tested are normal, and then iPhone battery drains properly.

by Bellin

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