An iPhone 6 Plus has touch disease, its touch function doesn't work. Because there are many important data on it, so it can't be flash. What can we do now? Get real fix here!
According our experience, there are two possible reasons. One is iPhone screen has some problems. The other is iPhone motherboard has some problems.
1. Replace the new iPhone LCD screen and test it, the problem still exist. Now, we can confirm that it is not the problem of screen, so we need to check the iPhone motherboard.
2. Disassemble iPhone by JM-9102 Disassemble Tools, and then remove the iPhone motherboard. Use multimeter to measure the touch voltage, the PP5V7_SAGE_AVDDH touch 5.7V shows normal data, the PP5V7_SAGE_AVDDH touch the -5.7V voltage has no value.
3. The other points are found to be normal,
power off to test whole circuit, we find circuit line is broken.
4. Soldering the broken line with jumper, conncet the 2 points in iPhone diagram
with jumper wire as shown in picture 11-5-2. Connect screen to measure the Touch Screen Control IC U2402 (sub touch chip
boost work).
Finally, assemble the iPhone , power on it and test it, now the touch function is back, the touch disease has been cured!



Comments
Post a Comment