IPhone5S Charge heating battery is not durable


In our daily life, often encounter mobile phone charging fever, and battery power is very fast, so that we go out to bring a lot of inconvenience, as I share some of the maintenance experience in this area。

Steps：

Plug the charger to charge for half an hour, finding that the iPhone is very hot and the temperature is nearly 70℃. Turn if off at once and tear it down to test.

First, replace the Tail Plug Flex Cable, but the problem is still the same. Tear down the motherboard and measure each relevant circuit. Measure the diode data to ground of each pin, such as charging tube Q2, USB Control chip U2 and USB interface J7. We find that diode data to ground of pin 26th of USB interface J7 is abnormal which is larger than the normal one 20. The location of pin 26th of USB interface J7 in bitmap is shown in picture 5-36.

Picture 5-36

After analyzing the circuit diagram, we know that pin 26th is connected to USB management chip U2. So replace U2 chip and turn on to test. But the problem is still the same. Then we continue to check the rest circuits. Remove Q2 and short connect the D pole and S pole on solder pad, as shown in picture 5-37. The location of Q2 is shown in picture 5-38.

Picture 5-37

Picture 5-38

Recharge it and test. IPhone is no longer hot and trouble is removed.

Comments

Post a Comment

Popular posts from this blog

Slove iPhone X Won't Turn On

Image
Customer delivered a iPhone X and described the fault is not to boot after the phone drop accidentally. It reports error 56 when restore the iPhone X. How to repair this fault? Because iPhone X is the two board connected through the middle column, it is easy to drop the point. It may be that the solder points from NFC chip to the CPU part have fell off. Take apart the iPhone X by iPhone Screwdriver Repair Tools , take the upper board off the main board, when separate the main board we see a row of points have fell off. Picture 19-3-1 Look at the location map on WUXINJI dongle , it is surrounded by a ground wire, in fact, there are 6 useful points dropped. The ground wire does not need to be filled, the 6 useful points are added by professional phone welding tools. These are the signal wires of the NFC chip, so the iPhone X would report error 56. Picture 19-3-2 Then the tin of the middle column is repaired by iPhone X BGA reballing stencil , and the AP part is welded bac
Read more

Setup and install the zxw tool Dongle Wizard

Image
So, you recently purchased ZXW Tools from our vipprog online store have no clue how to set it up?  Well, here is a quick guide detailing the installation process. Step 1 Unbox the ZXW tools dongle and plug it into your Windows PC.  ZXW tools does not support Mac at this time, so you’ll need a Windows compatible box. Step 2 Download the ZXW Tools software [direct link].  The ZXW tools website is in Chinese, but lucky for you, we’ve made it easy for you to download the latest version of their software directly from our website.  The zip file contains all of the files necessary to run ZXW Tools (trace) and Blackfish (schematics).  There is no installation process.  You just need to copy the files over to a directory on your desktop. Step 3 After you’ve copied all of the files over to a folder on  your desktop, then just run the ZXW tools executable.as shown in the picture. When your first run the software, the program will ask you if you want to activate the dong
Read more

IPhone 6P Front Camera and Distance Sensor Fault

Image
Received a iPhone 6 Plus, the customer said that the front camera can not be used, and the distance sensor has problem too. The two failures are concentrated on the front camera flex cable, which is likely to be caused by the damage of the wiring. First, we have to eliminate the possibility of the external parts fault, then consider the motherboard problem. Remove the screen assembly and replace it with a good one, we still can't turn on the front camera and use the distance sensor. Disassemble to measure the ground resistance of the front camera seat of J1111 by Fluke digital multimeter , it is found that several pins are infinitely large, and the related inductors are loose when touch with the pen. It seems that the small components are pseudo welded. 19-1- 1 Remove the motherboard and observe it under the Trinocular Stereo Microscope , we can see that the touch was repaired before. 19-1-2 The back of the sub touch chip U2402 is the front camera seat J1111, an
Read more