How to fix iPhone 6 electric torch cannot be opened and flashlight cannot be used

vipprogrammer is Professional iPhone mobile phone repair tools online shopping mall,we supply iPhone mobile phone all repair parts  with for your repair business.
So, vipprogrammer will still keep on working.
Trouble Phenomenon

According to the feedback from customer, flash light cannot be used. The iPhone has been fixed at other places. The maintenance personnel told the customer that no matter how many flash lights chip were replaced, they all would be burnt. After checking, there was a line that got into CPU short connected and CPU was broken. There is no way to fix it and the iPhone was returned back.

Repair Process

Turn it on and get into IOS to open torch, finding that the flashlight cannot be turn on. After removing motherboard, we find that there is no flashlight chip. Observing under microscope, we can see that some pins are missing on solder pad of flashlight chip. The location of solder pad is shown in picture 4-65. Then we call the customer and know that the previous maintenance personnel do not assemble the flashlight chip after tearing it down.

Picture 4-65

After counting under microscope, we know there are 8 pins missing. Previous maintenance personnel might worry about that high temperature would damage the CPU, so he violently pry up the chip.

Through schematic diagram, we know that the missing pins are earth wire, LED1 power supply and the pin used to auto-lift the voltage of flashlight chip, as shown in picture 4-66.

The flashlight chip is burnt because the pin used to auto-lift the voltage of flashlight chip is dropped.

Picture 4-66

Solder these pins under microscope and use BGA solder paste to solidify them. Assemble flashlight chip, as shown in picture 4-67.

Picture 4-67

Turn on iPhone and get into IOS to open flashlight. The LED can be opened normally. 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