Step by Step to fix iPhone 7 Plus Charge and Sound Failures

Here we got an iPhone 7 Plus that has charge and sound failures, the iPhone camera also won't work. What's trouble? Why this iPhone 7P has so many problems? The fact is this iPhone 7 Plus was damaged by dropping. Now, we are going to fix it step by step.

Step 1

First, we are going to fix iPhone 7P charge problem.

After plugging the iPhone lightning cable, the iPhone has no response, it's not charging. Connect iPhone to the computer, the computer also can't identified the device. Now, we confirmed that iPhone 7P charge problem is caused by iPhone USB charge IC.

Step 2

Remove the iPhone USB charge IC from the iPhone motherboard, use digital multimeter to measure the grounding resistance value of the solder point on the solder pad, we found the resistance value of the C3 is infinitely large, and this signal point is connected to the main audio IC via resistor R3104.

There are 3 kinds of possibilities for this case: first one is the resistor R3104 is damaged; second is the iPhone motherboard is pins dropped or disconnection; third is the iPhone audio IC is damaged.

Step 4

Put iPhone motherboard the Stereo Zoom Microscope, remove the iPhone main audio IC, the pins is dropped, and circuit line is disconnected. Soldering jumper wire in this point, and replace the iPhone big audio IC. Now measure the resistance value of the USB IC C3 pin, the data is 480, which is normal value.Now the charging current is 1.13A, the charge function is normal.

Because of the iPhone audio IC pins dropped and disconnection, after soldering the pins and replace the iPhone main audio IC, the iPhone audio function is back to normal, now we need to fix iPhone camera problem.

Step 5

Observe the iPhone camera, we found that was badly deformed. So we replaced the new iPhone camera, and then assemble the iPhone.

Press the iPhone power button, the iPhone 7P is turning on smoothly, after entering the IOS, the charge function tested is normal, the sound plays are normal, the iPhone camera works properly. The repairs end!