What should I do if the iPhone 7 Plus camera fails?
If our iPhone camera doesn't work. That feeling is definitely very bad.Our customers are in this situation.
He sent an iPhone 7 Plus to us, the fault described is that the iPhone no camera, after replace the new iPhone rear camera, the fault still there. This iPhone was repaired before, the previous phone repair shop repaired the iPhone WIFI module IC and U3301 iPhone audio IC. According to previous repair experience, we know there are 2 camera power supply transfer tube on the WIFI IC are easy to virtual weld, after remove it, and reinstall it, the failure still there.
Use the digital multimeter to measure the grounding resistance of the iPhone rear camera J3001 and J4501, and the data is normal. It is also normal to test the power of the camera socket.
Measure the I2C bus on J3001 and J450. When measuring the J3001 2 pin, it is found to be only 0.4V, but under normal conditions, the normal voltage of the I2C bus should be around 1.8V. Open the WUXINJI Dongle to check the iPhone schematic. This I2C bus is pulled up by the R4604 resistor through the safety resistors R3301 to M2600.
Combine iPhone bitmap to find R4604 resistor.
One side of the resistance value measured of R4604 is normal, the other side is 0.4V, which is obviously wrong，we suspect the pull up resistor is damaged. With the help of the QUICK 861DW hot air rework station and tweezers, we replace the pull up resistor, and the measure it again, now the both sides voltage of resistor are back to normal.
Enter the systems and test it, the failure has been repaired!
If you have any question about repairing iPhone，please contact us on www.vipfixphone.com.
He sent an iPhone 7 Plus to us, the fault described is that the iPhone no camera, after replace the new iPhone rear camera, the fault still there. This iPhone was repaired before, the previous phone repair shop repaired the iPhone WIFI module IC and U3301 iPhone audio IC. According to previous repair experience, we know there are 2 camera power supply transfer tube on the WIFI IC are easy to virtual weld, after remove it, and reinstall it, the failure still there.
Use the digital multimeter to measure the grounding resistance of the iPhone rear camera J3001 and J4501, and the data is normal. It is also normal to test the power of the camera socket.
Measure the I2C bus on J3001 and J450. When measuring the J3001 2 pin, it is found to be only 0.4V, but under normal conditions, the normal voltage of the I2C bus should be around 1.8V. Open the WUXINJI Dongle to check the iPhone schematic. This I2C bus is pulled up by the R4604 resistor through the safety resistors R3301 to M2600.
Combine iPhone bitmap to find R4604 resistor.
One side of the resistance value measured of R4604 is normal, the other side is 0.4V, which is obviously wrong，we suspect the pull up resistor is damaged. With the help of the QUICK 861DW hot air rework station and tweezers, we replace the pull up resistor, and the measure it again, now the both sides voltage of resistor are back to normal.
Enter the systems and test it, the failure has been repaired!
If you have any question about repairing iPhone，please contact us on www.vipfixphone.com.
评论
发表评论