跳至主要内容

How to Fix the iPhone 5S Charge Failure


The iPhone 5S has a charging fault, such as the iPhone that can be charged when it is turning on, but it can't be charged when it turns off, or it doesn't support the accessory, or it can't be recharged at all. How to repair the charge failure on iPhone 5S? Let's have a look in the article!

Check iPhone 5S circuit diagram on WUXINJI Dongle, we know that after plug the iPhone lightning cable, the charge voltage PP5V0_USB_PROT first passes through Q2, then to U2, and then to the iPhone power supply IC--U7, we can measure the voltage of 5V to U2 by Fluke 15B+ Digital Multimeter at point C272, and the 5V voltage can be measured at point C304.

If 5V cannot be measured at C304 and C32 points, this means that Q2 is damaged. In this case, we need a short connection to Q2, as shown in picture 1-1 below.


If one has 5V and the other not, which means there is a disconnection. In this case, we will use QUICK 861DW hot air rework station to solder a jump wire from C304 to C272.

Note:

1. If the C304 or C272 doesn't have the voltage, it will cause iPhone can be charge only when it is turned off or is the hint that the accessory is not supported

2. The iPhone 5S USB control IC--U2 is easy to damage, and then cause iPhone cannot be charged, cannot connect to computer and won't boot issues, so we need to replace the iPhoneUSB charge IC--U2.

3. The damaged iPhone battery and iPhone tail plug flex cable also can cause iPhone charge failures, such as won't charge,  "this accessory is not supported", or the percentage of charge icon is getting less when the iPhone in charging, so we need to replace the new iPhone batter or iPhone tail plug flex cable.

If you you think the article is useful and need more cell phone repair information, please check on www.vipfixphone.com

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

Solution: Why iPhone X Voltage Keeps Jumping

After getting the iPhone X motherboard to test, we observe the current value repeatedly jumps between 0mA and 50mA on DC power supply , and it is different from the normal booting current. Next, test whether the power supply of every circuit is normal. PP_VDD_MAIN is measured 4.2V; PP_VDD_BOOST measured is 4.2V. PP1V8-ALWAYS is 1.8V, all the values are normal. But when testing PP1V1_S2, PP0V8_SOC_FIXED_S1, PP1V8_S2 and other circuit voltage that output by power chip U2700 voltage are jumping constantly. According to previous experience, voltage jump is usually caused by a power supply circuit of U2700 output. Measured with digital multimeter , there is no short circuit was found for the dipole value of all power supply to ground. We repaired iPhone 7P before and know that if crystal oscillator is false welding can also cause voltage jumping, And if iPhone CPU  power supply is abnormal also can cause voltage jumping. Check the crystal oscillator we find no problem, then check th...
发表评论
阅读全文

Solution: iPhone 6 Signal Has No Service

We are going to fix an iPhone 6 device today, the iPhone 6 signal keeps searching state after booting, there is no baseband in local setting, and no series number shows up when dialing *#06# serial number. We find the iPhone 6 LCD (has been replaced once, this kind of situation is preliminary determined for baseband CPU false welding, it is relatively common situation on iPhone 6 and iPhone 6P. Anyway we need to test first! From the simple start, measuring the single iPhone 6 motherboard  baseband power supply, first measure the main power supply 4.2V (C3221_RF). Then testing basebnd output voltage of power supply on C3262, C3252, C3259, C3256, if there is a voltage without first measuring resistance, if resistance is normal, then replace normal baseband power test; if four of them are simultaneously without resistance, then you need to reinstall the baseband CPU. There is a small glass tube base strip above the baseband power supply, it must be noticed when the main ...
发表评论
阅读全文