SOLUTION: iphone 6s Water Damaged Issue

Maybe every cell phone can experience the possibility of water damage, when you accidentally drop your iPhone 6, iPhone 6s or iPhone 6s Plus in water you can still save it. Whether it’s in the sink, toilet or pool, we’ll show you how you can recover from most iPhone 6s water damage problems. The iPhone 6s is not waterproof and even though the iPhone 6s can handle water better, it is not waterproof either unless you put a case on it.

Trouble Phenomenon:

The customer said that his iPhone cannot be turned on after dropping into water. He opened the front panel and cleaned it. There are some bumps on the upper cover of CPU.

Repair Process:

1. Tear down the iPhone and connect the motherboard with adjustable power. Let it standby but there is no current. We can be sure that the main power supply is not short circuit. Triggering it on, the current changes to 50mA and then it is power fail, but goes back to 50mA again automatically. It repeats the former process again and again.

2. If the output voltage from iPhone 6S power chip is short circuit, the chip will get into the protection mode. Therefore we measure the diode data to ground of CPU upper cover, finding no short circuit. Then we measure the diode data to ground of each power supply, as shown in picture 1-1. We find the diode data to ground of EEPROM P3V0_NAND is 0, which is short circuit.

3. The test point of P3V0_NAND in bitmap is shown in picture 1-2. The material object is shown in picture 1-3.

4. Observing under microscope, we find that one end of a capacitor is black and eroded, as shown in picture 1-4.

5. After tearing the capacitor, the diode data to ground of EEPROM P3V0_NAND turns normal. Trigger it on and enter IOS normally. 

6. Checking iPhone bitmap, we find the location of the capacitor is C1503, as shown in picture 1-5, which is the filter capacitor supplying power to EEPROM. The circuit diagram of C1503 is shown in picture 1-6.