Skip to main content

Solution--iPhone 7 Plus PCB short circuit and no service

Here to get a best solution to fix iPhone 7 Plus PCB board short circuit and no service issues. The iPhone 7 Plus was accidentally got some water,  then some problems comes out. After checking, it shows large current. The details as follows.

First of all, observe the iPhone motherboard under the VGA Camera 7-45X Trinocular Stereo Microscope,  it is slightly water damaged, large current when connecting on DC power supply,  3.8V short circuited. Because it is slightly water damaged, firstly check the specific damaged area, and find that the capacitance is corroded, which is the capacitance on the 3.8V circuit.


Pick up the fault and solve it, then clean it in the water inlet, gently fix the trouble and test the whole function after screen installation, now all other functions are normal, but there is no service on the iPhone 7 Plus.

Observe the radio frequency section under the Trinocular Stereo Microscope , we find the reception of the front end is corroded.

The fifth trace supply power for RF 1.8V, there is a serious corrosion and the layer is burned, scraping the bottom circuit to solder jumper wire.

It should be noted that this line is the same as a three branch road. If we want to connect the two sides to the bottom and scrape the bottom, if we are not familiar with the circuit, we suggest to scrape up the circuit and check it, then scrape the trouble layer, it's better to carefully do the operation with specialized CPU Remove Graver  so as to avoid unnecessary troubles.


Finally, assemble the iPhone and test it again, now the iPhone is working,  it has service. Continue to check other functions, all is fine. The repairs end!


Labels:

Comments

Post a Comment

Popular posts from this blog

User Manual: JC V1 Programmer to fix iPhone light sensor/vibrator

As we know, the light sensor and vibrator is very important for iPhone screen. If you want to replace the iPhone screen, you also need to transfer the original screen data to the new iPhone screen(iPhone 8 to iPhone Xs Max),so you can make sure the new iPhone screen will work fine. Here is a  JC V1 programmer  to fix iPhone light sensor and vibrator problem (for iPhone 7- iPhone Xs Max), it also can repair iPhone baseband eeprom IC or iPhone logic eeprom IC problem. The JC V1 Programmer comes with 24-inch HD display screen, three-color LED indicator light, two small connecting seats (for connecting function panel) , two buttons and one function panel (including light sensor/touch connector, baseband function connector, vibration connector) It support 2 languages (Chinese/English) and three lines of code (read/write/burn/save), the function panel can be changed, the software can automatically update What’s the functions? - Repair iPhone Light sensor/ true ...
1 comment
Read more

Essential tools for a phone repair technician Everyday Use

Must-Have tools for a phone repair technician include precision screwdrivers, spudgers, tweezers, suction cups, and heat guns or hair dryers. Additionally, anti-static mats and wrist straps are crucial for protecting sensitive electronics. Other helpful tools include a multimeter, soldering iron, magnifying lamp or microscope, and various cleaning supplies.  Whether you're a DIY enthusiast or a professional technician, having the right tools is crucial for successful phone repair. Here's a breakdown of common phone repair tools, categorized for clarity: I. Essential Opening and Disassembly Tools: Precision Screwdrivers : These are the most fundamental tools. Phones use tiny screws of various types (Phillips, Pentalobe, Torx, Flathead), so a comprehensive set with magnetic tips is highly recommended to avoid stripping screws and losing tiny parts. Spudgers ( Pry Tools ): Made of plastic or nylon, these non-conductive tools are invaluable for safely prying open phone casings...
Post a Comment
Read more

How to restore & unlock the apple watch series 1, 2, 3, 4, 5, and 6?

  Can you always remember your password? What should you do when there is a red exclamation error on your Apple watch after update you iWatch？6 IN 1   AWRT iBus   Tools, a professional Apple Watch recovery tool, enables you to unlock, repair and remove the exclamation error easily.   Why choose the AWRT iBus tool? Perhaps you would tell me Apple support team can solve the trouble. While they may help, you may not be patient enough because you want your watch fixed immediately. Moreover, you don't have to wait for too long for them to help you solve the issues. 1. This incredible device has an inbuilt original restore adapter for the apple watch of the series S1, S2, S3, S4, S5, and S6 42 mm and 38 mm /$199. There are also S1-just 38MM /$39.99, Adapter for S1-42mm 38mm /$139.99, or Adapter for S2 S3 - 42mm 38mm /$169.99 version for choosing. The tool requires professional Apple Watch Firmware  IPSW File  for iWatch S1-S6. 2. Moreover, the iBus tool has a lot...
Post a Comment
Read more