跳至主要内容

How to Fix iPhone 6 Charging Problem


This iPhone 6 device has been repaired before, the main fault is the charging problem, although the screen shows a charge icon, but the power does not really enter the mobile phone, and the phone reboots sometimes. After receiving this fault cell phone, we found that the main board charging chip, battery and accessories were replaced before.



1. Measure the voltage of (C1408, C1700) USB were given to U1401 charge tube and U1700 (U2), the both 5V value are normal.

2. Remove the U2 and charge tube respectively, measure the bottom voltage to see whether the iPhone 6 motherboard has broken cables, the result shows that the two chips are all normal.

3. Replace the two new chips and charge to have a test, the fault is same as before.

4. Connect the iPhone 6 with computer, It displays no data for the battery life on Ace assistant, this often happens on iPhone 6 and iPhone 6P, basically it's caused by the problem of CPU to the charge tube battery detection circuit, also the solutions are different.

5. By checking 2.2K resistance(remove R0302 and R0303 from junk motherboard) on WUXINJI schematic diagram, then connect the two resistors together. One end receives the main power supply, and the other end is grounded, and solder a jumper wire to charge tube G1 pin in the middele of the two resistors.

6. Personally, I think this method is troublesome, there is another simple way to use: add a 10K resistance (R0307 or R0310) on C1700(next to U2), which can be directly welded to one end of the C1700 PP3.0V, the other end can be welded to the charge tube G1 pin, then use green oil and UV light to solid.

7. Install the iPhone 6 device to test, charging function is normal now.

More professional cell phone repair tutorials, please visit www.vipfixphone.com

标签：

评论

发表评论

此博客中的热门博文

iPhone 6 Display Failure after Replacing LCD

The iPhone 6 display is black after replacing LCD. After checking, the diode data of display socket is normal and all power supply for iPhone display IC  output is normal. Testing by  DC power supply , we find the iPhone current is abnormal. When press the iPhone power button, the boot current is obviously large. The current reached 100mA when press the power button. After remove the display tube, the current still the same, which means there is a short circuit. Measure the voltage output of each circuit of power supply with Fluke 15B+ Digital Multimeter , then surprised to find that there are really short circuit places. LD010 is short circuit; we suspect that the filter capacitance on the circuit has been penetrated. After remove the iPhone power control IC , we found it is ground short circuit. Open the WUXINJI Dongle  to check the iPhone schematic circuit, we found that this circuit is the display card image transmission MIPI data bus power supply. CPU brea...
发表评论
阅读全文

Iphone 6S Enters DFU Mode Cannot Start Fault Repair

The customer said that he did not know what the reason was. The mobile phone has been restarted indefinitely and can enter the DFU mode. However, when the flashing machine fails to enter the recovery mode from the DFU mode, and then the mobile phone is connected to the computer for 5-10 minutes, it automatically enters the recovery mode. After we received the 6S that could not be started, we disassembled the power with iphone engraving tool and turned on the power to 100mA. First of all, check if you can connect and read the DFU mode after connecting to the computer. Wireless DFU can not exit, we can only brush the machine to view the error. Refresh Aisi and iTunes respectively. If you stuck on the progress bar for a long time, it is very likely that the error is -1. If the progress bar does not enter, you can roughly determine the probability of a CPU failure. Now we need to see if there is a problem with the hard drive. First, use DC power supply for iphone repair, the hard disk o...
发表评论
阅读全文

Tutorial: iPhone 6S Plus Backlight Repair

Since the size of iPhone6s plus screen display  is large, it's necessary to use two sets of background lights to supply power, one is provided by U4020, the other is provided by U4050. 2  sets of circuit 1) PP_LCM_BL_ANODE,     PP_LCM_CAT1, PP_LCM_BL_CAT2 2) PP_LCM_BL34_ANODE,  PP_LCM_BL_CAT3, PP_LCM_BL_CAT4 For PP_LCM_BL_ANODE and PP_LCM_BL34_ANODE, if one of the circuit has no voltage value, it will cause the iPhone 6s Plus screen to be half bright and half dark. For PP_LCM_CAT1, PP_LCM_BL_CAT2, PP_LCM_BL_CAT3 and PP_LCM_BL_CAT4, if one of  these four circuits gets abnormal signal, it will cause the 1/4 screen to be dark. Solution: Use jumper wire  to short connect PP_LCM_CAT1 and PP_LCM_BL_CAT2 or you can also connect PP_LCM_CAT3 and PP_LCM_BL_CAT4. The control signals of these two sets of backlights, one group of inductors FL4211 FL4212 FL4213 are sent to the display interface. The other group is sent to the display interface...
1 条评论
阅读全文