How to solder the CPU of a mobile phone, explain in detail

After you remove the CPU, replant the CPU with a tin board, then clean the pad of the CPU on the motherboard, then apply flux and blow it flat with a heat gun, then put the CPU on it to align the positioning hole, modulate the heat gun demeanor to 330 degrees Celsius, and the demeanor to 0 degrees Celsius, start blowing from the top of the CPU to the middle of the CPU, and then blow from the CPU around the CPU after seeing the CPU slowly sinking, pay attention to not moving the CPU can not be blown obliquely, only blowing directly above, When you see the flux flowing out from under the CPU, it's basically good, and the success rate is high when you are familiar with it!

Mobile phone CPUs are different from ordinary components in that they have no pins, only neatly arranged solder joints.

First of all, the solder joints are tinned, and a special tin tool and heat gun are applied.

The tin tool is actually a thin piece of iron, on which are blocks of the same size as the mobile phone's CPU.

The squares are full of small holes, which can correspond to the solder joints of the mobile phone CPU, and the mobile phone CPU solder joints are also varied, but there is always a small square on the tin tool.

You might as well take it to a repair station.

Yes, it must be machine welding, and the CPU is not a resistor, capacitor, or something like that, how can you solder it by hand.

Solder the phone CPU with a machine. Hand welding can't be done.

Try the place to repair the phone.

The mobile phone CPU soldering operation is as follows:

1. Mobile phone CPU is different from general components, it has no pins, only neatly arranged solder joints;

2. Tin the solder joint, special tin tool and heat gun;

3. The tin tool is actually a thin piece of iron, on which is a square of the same size as the mobile phone CPU;

4. The squares are full of small holes, which can correspond to the solder joints of the mobile phone CPU, and the mobile phone CPU solder joints are also diverse, but there is always a small square suitable for the tin worker.

The CPU is generally BGA packaged, which is disassembled with a heat gun or professional equipment, and it is difficult to solder, so steel stencil and solder paste are used!

Hehe, it's an electric cautery, but it's not an electric cautery gun in a family workshop. （= .=) The size of the mobile phone CPU is very small, and the soldering legs are even smaller, and the motherboard is automatically soldered by the machine when it is manufactured.

If the landlord is curious, you can use a heat gun to blow it for a while to remove the CPU, but installing it is a technical job, and professionals say that they are under pressure.

If you're not a professional, you don't have to dismantle it!