Wholesale iPhone 8 Motherboard China
Refurbished iPhone8plus, refurbished iphone8, the motherboard is broken, how should the repairing engineer to do the repair work? The main board is a whole board, it can't be all bad. It has hundreds of chips, capacitors, resistors, and small electric parts. The main board is composed of...
Refurbished iPhone8plus, refurbished iphone8, the motherboard is broken, how should the repairing engineer to do the repair work?
The main board is a whole board, it can't be all bad. It has hundreds of chips, capacitors, resistors, and small electric parts. The main board is composed of inner and inner surface lines of the board.
1, these components make up the entire motherboard, as long as they are broken, one of them may cause the boot,
2. It is generally the case that one of them bumps or falls into water, causing one of them to be soldered or short-circuited.
3. Once the power button is pressed, these chips and small power supplies each have their own functions.
4. For example, when the power button is pressed, the power supply system response will be triggered. From the battery to the power supply chip, the power chip to the board layer line and then to the cpu chip, the cpu chip will control the input or output of all functions (it is equal to the human body). The brain) includes receiving screen jog, sliding requirements, and then assigning to the chip on the motherboard responsible for various functions, letting the chip start the part work, and then feeding back the screen or sound output (for example: when pressing the music software on the screen, click Select a song and the music software will play the song).
5, so once one of the whole power supply system chip soldering (usually caused by the motherboard is broken) or short circuit (usually caused by the motherboard after water), such as power chip or power chip solder joint or short circuit, will cause the power supply system can not Powering the cpu, the CPU can't play the role of the brain, and the command will work, then the phone will not be able to run.
6, the chip short circuit in this case can only replace the short-circuited chip first, and then power-on test, and then continue to gradually check the next chip and the next layer of the layer line, generally replace a chip is generally 200 yuan.
7. If the board layer is short-circuited or broken, the line inside the board layer cannot be repaired manually, and the surface layer of the board layer can be repaired by manual flying line.
8, so repair the motherboard is a process of step-by-step detection, troubleshooting and repair.
Of course, all of these technologies require chip-level technology, and it is not an ordinary repair shop that the master can repair. We iusedphone wholesale professional, qualified iphone motherboards to seek long-term cooperation.