iPhone 6S rear camera cannot be used after water damaged

What Should you do, When your IPhone 6 has Water Damged Multi-Fault issue, You can look at the solution I wrote in the following article, try these ways，you may see it rise from the dead! 

We got an iPhone 6S from customer, the problem is the rear camera cannot be used after water damaged for a sometime. We replace the new camera, but the problem still the same, so we remove the motherboard and start to repair. Observing it under a microscope, and we found that power supply pipe of rear camera was been burnt down, as shown in picture 9-1-1, take out it directly. This chip is converted to 2.85V by main power supply chip VCC_MAIN, and then to rear camera, it supply power to front and rear camera on iPhone 6, but it only supply power to rear camera on iPhone 6S.

After take out the chip, we found the pin of main power supply was been burnt down. Because this chip is too small and hard to replace, direct short connect is also undesirable and unstable, night photography is not clear, so we want to borrow 3V voltage to here. We heard there is a 3V test point on the motherboard which near the middle plate iPhone screws. But there are four test points, and we're not sure which one. As shown in picture 9-1-2 

We shave one and then turn it on, measure it with multimeter, we found this one is the 3V test point. As shown in picture 9-1-3

Solder a jump wire on it, as shown in picture 9-1-4.  

After test, it can take pictures. Apply green UV oil and assemble iPhone. Picture 9-1-5

What's surprising is that the customer sends the phone back on the next day, and he said all was fine at the beginning, but the phone was in serious heat at night, and then it cannot turn on. Why is that?

Measure it with multimeter, it shows large currents directly,  the resistance value of iPhone battery interface is normal, which means the main power supply  short circuit, most of this is caused by the breakdown of the capacitor. So we're still going to follow the routine burning process to repair. Apply rosin on the position of main power supply, and then start to burn. Many peers use 2A power multimeter to do it, but direct burning doesn't work. You can use battery which in mobile power supplies to do it, as shown in picture 9-1-6.

One side connect machine, one side connect the position which is short circuit, but until the tin wires were melted, there was still no change on the back of the iPhone motherboard.  Look at the front of motherboard, we found a little black which in the place of fix the camera problem. Check it more carefully, we found this point was burnt out; the PCB board also was burnt. There was a lot of black dust when we shave with scraper blade, that's why the phone is so hot. Seriously clean the circuit, but the resistance is still low. We need to keep cleaning it up, so we continue cleaning it under the microscope, until the short circuit problem disappears. picture 9-1-7

Apply the green UV oil on this point, after baking it with the UV glue ultraviolet light, we install the camera 3V on it. We're worried that the motherboard is still hydrated, so we bake it at 130 degrees on the heating platform. At the end, assemble the iPhone and send back to customer.

Summary:

When you are going to fixing cellphone which suffers from water damage, there are likely to be squealed. You have to vaccinate your customer in advance to inform them of the danger. Otherwise, you may face the risk of compensating your customer's cell phone.

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