Today we received message from client: "My iPhone dropped into water and cannot be turned on. It still can't work till now though I sent to repair shop." How to deal with the phenomenon, there are some detailed steps to fix it.
This iPhone 6S motherboard ’s large area is water damaged and water has been cleaned. There are bumps on the upper board of CPU. After measuring, we find that the power supply of upper board is not short circuit. Plug the adjustable power supply and the standby current is about 0.24A.
After measuring, we find that the diode data of PP_VCC_MAIN is small, only several tens. The capacitor near Wi-Fi chip darkens badly. The location of darkened capacitor in bitmap and its material object are shown in picture .
Remove it and now the diode data of PP_VCC_MAIN is more than 100mA. As the water-damaged area is large, after observing carefully, we find that a capacitor at audio IC darkens badly too. Its location in bitmap and its material object is shown in picture.
Remove it and now the diode data of PP_VCC_MAIN is more than 300mA. Plug power supply and the standby current becomes more that 30mA. Each power supply circuit is not short circuit. We can feel that the upper part of the circuits is hot when plugging power supply. Thus, put rosin at upper part of the circuits and wait it melt slowly, finding that the rosin at circuits of display screen power melts faster than other parts. The location of display power chip in bitmap is shown in picture.
Material object
Remove display screen power chip and connect power supply. The standby current recovers to normal
Replace display screen power and the IC recover. IPhone can be turned on and can display.
Hope it will help you, read more on www.vipfixphone.com
This iPhone 6S motherboard ’s large area is water damaged and water has been cleaned. There are bumps on the upper board of CPU. After measuring, we find that the power supply of upper board is not short circuit. Plug the adjustable power supply and the standby current is about 0.24A.
After measuring, we find that the diode data of PP_VCC_MAIN is small, only several tens. The capacitor near Wi-Fi chip darkens badly. The location of darkened capacitor in bitmap and its material object are shown in picture .
Remove it and now the diode data of PP_VCC_MAIN is more than 100mA. As the water-damaged area is large, after observing carefully, we find that a capacitor at audio IC darkens badly too. Its location in bitmap and its material object is shown in picture.
Remove it and now the diode data of PP_VCC_MAIN is more than 300mA. Plug power supply and the standby current becomes more that 30mA. Each power supply circuit is not short circuit. We can feel that the upper part of the circuits is hot when plugging power supply. Thus, put rosin at upper part of the circuits and wait it melt slowly, finding that the rosin at circuits of display screen power melts faster than other parts. The location of display power chip in bitmap is shown in picture.
Material object
Remove display screen power chip and connect power supply. The standby current recovers to normal
Replace display screen power and the IC recover. IPhone can be turned on and can display.
Hope it will help you, read more on www.vipfixphone.com
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