How can we repair the iPhone 6 without touch
We received an iPhone 6 and the fault was that the iPhone didn't touch at all, and the iPhone 6's touch function didn't work. The iPhone white touch IC that doesn't work is completely untouched. How to fix it? The following is a detailed repair step.
After removing the iPhone motherboard, we found that the iPhone black and white touch IC has been replaced by the original repair personnel. Measure the working state of the iPhone black and white touch IC and measure the 5.1V and 1.8V of the iPhone white touch IC.
The iPhone black touch IC +5.7V -5.7V and 1.8V power supply.
After measure them with digital multimeter, all the data tested is normal. Remove the iPhone black and white touch IC, and then measure the diode data for the solder pad, it is normal.
Based on previous repair experience, we know that the iPhone 6 Plus display socket synchronous signal inductance easy to empty weld and causes iPhone no touch at all. The data of iPhone 6 display socket synchronous signal measured is about 400, which is normal. According to this repair idea，we replace the new U2403 touch synchronous tube, and then turn on iPhone test it, but the problem still there.
Remove the touch synchronous tube, and then measure the 6 pin ground resistance, about 700, it is normal data. When measure the first pin, we found an anomaly, the resistance value of this pin is infinitely large，while the normal data should be about 400.
Check iPhone schematic diagram through the WUXINJI Dongle, we know that this pin is connected with a test point PP2405, the data of PP2405 tested is 400, which is normal, so we decided use QUICK 861DW hot air rework station to solder the jumper wire between PP24005 and the first pin on the synchronous tube .
After soldering and install the synchronous tube, turn on iPhone and get into IOS to test, now the iPhone touch failure has been repaired.
If you want to learn more about repairing mobile phones, please visit www.vipfixphone.com.
After removing the iPhone motherboard, we found that the iPhone black and white touch IC has been replaced by the original repair personnel. Measure the working state of the iPhone black and white touch IC and measure the 5.1V and 1.8V of the iPhone white touch IC.
The iPhone black touch IC +5.7V -5.7V and 1.8V power supply.
After measure them with digital multimeter, all the data tested is normal. Remove the iPhone black and white touch IC, and then measure the diode data for the solder pad, it is normal.
Based on previous repair experience, we know that the iPhone 6 Plus display socket synchronous signal inductance easy to empty weld and causes iPhone no touch at all. The data of iPhone 6 display socket synchronous signal measured is about 400, which is normal. According to this repair idea，we replace the new U2403 touch synchronous tube, and then turn on iPhone test it, but the problem still there.
Remove the touch synchronous tube, and then measure the 6 pin ground resistance, about 700, it is normal data. When measure the first pin, we found an anomaly, the resistance value of this pin is infinitely large，while the normal data should be about 400.
Check iPhone schematic diagram through the WUXINJI Dongle, we know that this pin is connected with a test point PP2405, the data of PP2405 tested is 400, which is normal, so we decided use QUICK 861DW hot air rework station to solder the jumper wire between PP24005 and the first pin on the synchronous tube .
After soldering and install the synchronous tube, turn on iPhone and get into IOS to test, now the iPhone touch failure has been repaired.
If you want to learn more about repairing mobile phones, please visit www.vipfixphone.com.
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