If you are not a professional repair man, we advise you had better not do the repair work by yourself.
Today the repaired iPhone really is an accident which can be avoided, the customer said he want to try to repair it by himself, he disassemble it with his own tool. Obviously, the result is not good, maybe there happens some fault during he dealt.
The directly words is that you need to spend a high cost than before the little fault. If you sent it to us from the beginning, or another said, you can purchase some phone repair tool to support your work. You know the charge fault always along with the motherboard, we have to disassemble it and check it from inside to outside. Okay, let us start our today's fix work.
Firstly we need to boot it without battery with the charging cable, but it still no any charge status. Connecting it to computer, we found the computer can't recognize the iPhone, based on our ever repair experience, we can basically confirm that the fault was caused by iPhone USB control IC.
Disassemble the iPhone USB control IC from iPhone motherboard, and then measure the diode data of iPhone solder joints on solder pad with Fluke 15B+ Digital Multimeter, finding that the diode data of iPhone USB IC C3 pin is infinitely large. This signal point is connected to iPhone main audio IC by through resistor R3104.
There are three reasons can cause this case, one is resistor R3104 is damaged; the second one is the iPhone motherboard dropped pins and disconnection; the third one is iPhone big audio IC is damaged.
Picture 15-2-1
Remove the iPhone main audio IC and check it under the 7-45X Trinocular Stereo Zoom Microscope, there's a pins dropped and disconnect. Fix the jump wire of the pin, and replace the iPhone big audio IC. Now measure the diode data of USB IC C3 pin again, the data is 480, and it’s normal data.
So we need to re-install it and insert the charger again, test it again ,we get the current value is 1.13A, according to the wuxinji diagram shows,we can know the charge function is recover normal.
For the sound fault, during we testing, we found there exist some dropping pin, so we decide to change an new iPhone audio IC.
So like what we have talked, from the beginning, it is just a little fault, but if you don't deal it carefully, maybe it will cause a big problem. Though we have repaired, it is under the professional tools situation, it will need a high cost for this repair.
But the result is goods, the phone can be used again and all of the function shows normally. Hope what we shared can help you avoid this fault.
Today the repaired iPhone really is an accident which can be avoided, the customer said he want to try to repair it by himself, he disassemble it with his own tool. Obviously, the result is not good, maybe there happens some fault during he dealt.
The directly words is that you need to spend a high cost than before the little fault. If you sent it to us from the beginning, or another said, you can purchase some phone repair tool to support your work. You know the charge fault always along with the motherboard, we have to disassemble it and check it from inside to outside. Okay, let us start our today's fix work.
Firstly we need to boot it without battery with the charging cable, but it still no any charge status. Connecting it to computer, we found the computer can't recognize the iPhone, based on our ever repair experience, we can basically confirm that the fault was caused by iPhone USB control IC.
Disassemble the iPhone USB control IC from iPhone motherboard, and then measure the diode data of iPhone solder joints on solder pad with Fluke 15B+ Digital Multimeter, finding that the diode data of iPhone USB IC C3 pin is infinitely large. This signal point is connected to iPhone main audio IC by through resistor R3104.
There are three reasons can cause this case, one is resistor R3104 is damaged; the second one is the iPhone motherboard dropped pins and disconnection; the third one is iPhone big audio IC is damaged.
Picture 15-2-1
Remove the iPhone main audio IC and check it under the 7-45X Trinocular Stereo Zoom Microscope, there's a pins dropped and disconnect. Fix the jump wire of the pin, and replace the iPhone big audio IC. Now measure the diode data of USB IC C3 pin again, the data is 480, and it’s normal data.
So we need to re-install it and insert the charger again, test it again ,we get the current value is 1.13A, according to the wuxinji diagram shows,we can know the charge function is recover normal.
For the sound fault, during we testing, we found there exist some dropping pin, so we decide to change an new iPhone audio IC.
So like what we have talked, from the beginning, it is just a little fault, but if you don't deal it carefully, maybe it will cause a big problem. Though we have repaired, it is under the professional tools situation, it will need a high cost for this repair.
But the result is goods, the phone can be used again and all of the function shows normally. Hope what we shared can help you avoid this fault.
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