We should treat every sick phone carefully, especially it takes the important data. As the scene we saw, iPhone 6P touch can't response after we pressed it while the customers said there has some important data. So we have to check it carefully, let us take some effective measures to fix it:
1. The failure is that the touch can not be used, we still follow the rule: easy operation first, first replace the iPhone screen, the touch is still no working.
3. Remove the motherboard and connect to measure touch voltage, PP5V7_SAGE_AVDDH touch +5.7V is normal, PP5V7_SAGE_AVDDH touch the -5.7V voltage has no value. As shown in 11-5-1.
4. The other points are found to be normal, power off to test whole circuit, we find circuit line is broken. Picture 11-5-2
5. Soldering the broken line with jumper, connect the 2 points in iPhone diagram with jumper wire as shown in picture 11-5-3, actual picture as shown in picture 11-5-4.
6. Connect screen to measure the iPhone screen control IC U2402 (sub touch chip boost work).As shown in picture 11-5-5.
7. Install to test, the iPhone 6 Plus touch can work in a normal way now, repair ends here!
No comments:
Post a Comment