"Brother Jiang Ning, let me try, although I dare not say that it is 100% successful, but I think I still have some certainty. Pen Fun Pavilion wWw. ｂiquge。 ｉｎfo”

Hearing Jiang Ning say that he wanted to fly out of the CPU, Cao Jianwei saw that no one stood up, so he simply stepped forward and recommended himself.

For Cao Jianwei's actions, everyone suddenly felt that it was very suitable, if Cao Jianwei was not good among the people present, then there was really no one who could do this job.

"Oh, then it's troublesome Brother Cao!"

Jiang Ning nodded at Cao Jianwei.

"Brother Jiang Ning, I'll blow the CPU down first, and I'm going to fly the pin to that pin, you can tell me in a while." ”

Cao Jianwei instructed, then took the circuit board, came to the soldering station next to it, picked up the air gun and tweezers, and began to take the CPU.

As one of the most complex components on the circuit board, the removal of the CPU is also an extremely difficult action, which requires the solderer to use an air gun to completely melt the CPU and then lift it vertically with tweezers.

Although this process is very easy to say, however, it is difficult to do, not to mention the rest, the CPU area is huge, so it is not easy to heat up, especially to make it evenly heated, the heating is not in place, the solder is not fully melted, and the CPU cannot be taken at all.

If the heating is too much, there is a high risk of irreparable damage to the solder joints or other parts of the circuit board, so it is important to master this heat.

Obviously, Cao Jianwei can be said to be an outstanding figure in this regard, I saw him holding a wind gun in his left hand, carrying out light and flexible rotary heating on the CPU, and holding tweezers in the other hand, when the heating reached a certain level, he gently touched the CPU twice with the tip of the tweezers.

One hand continues to heat the CPU, and the tweezers in the other hand opens, gripping the CPU firmly, and then gently lifting it upwards.

Swish!

A huge CPU chip was lifted up in response.

Syllable!

Cao Jianwei's left hand flexibly turned off the air gun, and then put it back in place, and the tweezers in his right hand clamped the CPU chip that had just been blown off, put it in front of the fan, and cooled down.

After a while, Cao Jianwei carefully put the cooled CPU chip aside.

"Brother Jiang Ning, let's talk about it, which pin is flying in the line?"

Originally, for a complex chip like CPU, when talking about the operation of a certain pin, you should watch the PCB diagram on the computer to operate, otherwise there are hundreds of pins densely, how to know which is right which?

However, just now Zhang Min asked Jiang Ning to look at the PCB diagram's suggestion, but Jiang Ning gave it a no, he said that he didn't need to look at the PCB diagram to determine the pin, which couldn't help but make everyone sweat hard, because, how do you look at it, how is it an unprofessional move?

Tang Haotian and Li Jian on the side sneered even more, they secretly said, Jiang Ning, you just pretend, in the end, you can't get it, it's exposed, it's good for you!

Just now, Cao Jianwei also heard Jiang Ning say that he didn't need to look at the PCB diagram, so at this time, he directly asked Jiang Ning which pin to operate the flying wire.

"Oh, I'll see, um, yes, it's the eleventh row, the ninth position, and a wire is drawn from this pin, grounded!"

Jiang Ning casually glanced at the dense solder joints, and then said.

Although this CPU is simply complicated, but, as a mid-stage Jindan powerhouse with spiritual sense, remembering this little thing is as easy as eating and drinking, before, Jiang Ning detected that there was a problem with the pin when it was powered on, and he had already memorized its location, and now it was very easy to point it out.

"Brother Jiang Ning, this pin is grounded, right?"

In order not to have a problem, Cao Jianwei then clicked on the welding point with the tip of the tweezers, and after reconfirming with Jiang Ning, he began to 'fly the wire' on it.

In places with dense solder joints such as CPU pins, the "wire" used is a hair-like ultra-thin wire called "enameled wire", which has a layer of non-conductive paint on the outside for insulation, and when used, it is brushed with solder at both ends to play a role in conduction.

Cao Jianwei first brushed a little tin on one end of the enameled wire, and then used an 'electric soldering iron' to solder it on the solder point that Jiang Ning said earlier, and then used a multimeter to measure the closest 'ground' foot to this solder joint on many solder joints.

The so-called "ground" pin, in fact, is the "negative pole" of the circuit circuit, if someone has seen the circuit board, they will find that often, on the circuit board, there is a large piece of "bare - exposed copper" exists, in fact, these are the so-called "ground" feet.

Because the flying wire is carried out inside the CPU, for the dense soldering points inside, naturally, the shorter the distance of the flying wire, the better, so Cao Jianwei chose the 'ground' foot, fortunately, in the CPU, there are many such feet, and there is no need to worry about not being able to find it.

After determining the 'ground' foot, Cao Jianwei measured it, then cut the enameled wire with small scissors, and then brushed this end with solder and carefully soldered it to the 'ground' foot.

Now, Cao Jianwei has completed the pin grounding action that Jiang Ning said just now, and the most difficult step remains, that is, to re-solder the CPU chip.

Originally, the action of soldering the CPU alone was very difficult, but now, under the CPU, there is an extra 'enameled wire', which naturally makes this action even more difficult, which is the most test of the welder's skills!

If the soldering is 'light', then there will be a 'broken circuit', and if the soldering is 'heavy', it will cause tinning, so that the circuit will be 'short circuit', and this balance is extremely difficult to grasp.

Cao Jianwei first used a small steel mesh to 'hold the solder ball' of the CPU that was blown down before, and after getting it, he carefully clamped the CPU holding the solder ball with tweezers, close to many solder points, and then used an air gun to heat the CPU and the circuit board at the same time.

Waiting until the solder balls on the CPU and the soldering points on the circuit board have melted, Cao Jianwei carefully put the CPU horizontally, and then continued to heat it with the air gun, carefully touching the surface of the CPU with tweezers, and probing the soldering situation, about a minute later, Cao Jianwei finally turned off the air gun, put down the tweezers, and cooled down the CPU with a fan.

During the whole process of Cao Jianwei's soldering CPU, everyone was worried about disturbing him, so no one dared to speak, and now that he was done, Xiao Tiansheng asked out loud: "Jianwei, is the welding done?"

"Well, it should be almost!"

Cao Jianwei nodded, and then said.