Director Zeng saw that until now, Jiang Ning was still pretending to be there and pointing out the country, so he was angry, and said secretly: "Hmph, boy, I will expose you later, and verify that you are all nonsense, and at that time, look at what kind of expression you have!"

With such thoughts, Director Zeng sat next to the soldering table, took the circuit board that Jiang Ning had just marked, and then picked up the air gun and tweezers, and replaced the components. Pen @ fun @ pavilion wWw. ｂｉｑUｇE。 ｉｎｆｏ

The components on the circuit board of the mobile phone are soldered with 'tin', the melting point of tin is not too high, only more than 230 degrees, if you want to melt it, you generally use more than 300 degrees of 'electric soldering iron' or 'air gun'.

In soldering wires, mobile phone displays, or local heating things such as cameras, 'electric soldering irons' are used, and soldering resistors, capacitors, inductors, and other chip components are used to use large-area heating equipment 'air guns'.

The air gun is a tool that conducts the heat of the internal heating element to the parts that need to be disassembled and assembled through a blower device.

When disassembling components, in addition to heating equipment, another tool is used, that is, 'tweezers', one hand is held with an air gun, melts the solder, and the other hand uses tweezers to pick or solder the components onto the circuit board.

Welding components are also a technology, it has certain requirements for whether the heating is uniform, whether the tweezers are stable, whether the technique is accurate, etc., and ordinary people really can't do this job.

In particular, complex components such as CPU chips with hundreds of pins can only be soldered by people with high professional skills.

Generally speaking, large companies will be equipped with some professional welding personnel, of course, most of the hardware engineers, because it involves the problem of debugging circuit boards, so they also have some mastery of welding technology, soldering some simple components can still do.

The welding skills of this Zeng supervisor are really good, and the five components have been replaced by him in the blink of an eye, and his skills are so fast and sophisticated in welding that Jiang Ning can't help but nod secretly in his heart.

"Little brother Jiang Ning, why don't you try it now?"

After replacing the components, Director Zeng put the circuit board under a special fan and blew it for a while, and after the temperature cooled down, he said to Jiang Ning without smiling.

He personally took action, and the welding was completed so quickly, in order to be at this moment, he wanted to expose Jiang Ning, a nonsense, who didn't know how to pretend to understand, and was greedy for money and brainless kid!

"Oh, of course it's no problem, Director Zeng, I'll give it a try. Jiang Ning said very calmly.

"No, I'll do it!"

Director Zeng had already wanted to drive Jiang Ning, a troublemaker, out, so he simply took the board and got started.

The banter on the faces of the many hardware engineers around them became even stronger at this time, because they were about to witness the moment of Jiang Ning's slap in the face, these engineers had been busy for two days in a row, and they were physically and mentally exhausted.

At this time, Hu Dahai almost didn't want to stay here anymore, and he really couldn't bear to see that his iron buddy was about to make a fool of himself in public.

In addition to Jiang Ning, among the people present, Feng Kun, the big boss of the company, still has a little hope, one is because he doesn't have a deep understanding of the hardware, and the other is that if he doesn't find out the problem today, then he will not only face millions of compensation from the customer, but also the project may be completely dead because of this, and the loss at that time will be a painful number for him.

Under the playful gaze of many hardware engineers, under the anxious gaze of the big boss Feng Kun, and under the indifferent gaze of Jiang Ning, Director Zeng, who had a hint of sarcasm on the corner of his mouth, put the circuit board that had replaced the components into the fixture.

Click!

With a crisp sound, Director Zeng pressed the power switch, and suddenly, the fluorescent screen supported by this circuit board lit up, and after the boot program was completed and the mobile phone signal was searched, Director Zeng directly clicked the dial button.

Unsurprisingly, the call went through.

"It's 20 degrees, there is no problem with the phone, you can call, and now, I'll turn down the temperature for a test!"

As Director Zeng spoke, his hand began to rotate on the temperature adjustment button, 20°C, 19°C, 18°C, 17°C, 16°C, when the temperature reached 15°C, Director Zeng paused, because the circuit boards that had problems before began to have problems when they were below 15°C, and he has now adjusted to this threshold.

Everyone around naturally knew this, and they understood that the next moment, the answer would be revealed, and at the same time, Jiang Ning, a guy who was talking nonsense, was about to be exposed.

The disdainful smile on the corner of Director Zeng's mouth was even better, and with a movement of his fingers, the temperature was adjusted to 14°C by him!

Then, the supervisor pressed the dial button again.

Swish!

However, the call was still connected, without the slightest problem!

At this moment, many hardware engineers and Director Zeng who were going to see the joke couldn't help but be slightly stunned, but then Director Zeng said: "Heh, this board has caught up with a small probability event, I'll turn down the temperature a little bit and try it!"

After Director Zeng said this, many hardware engineers were suddenly surprised, and some people said: "Yes, when I was experimenting before, but when I ran into a board, when it was adjusted to 13°C, I could make a call, and this one should be similar to that one." ”

Others couldn't help nodding, although this is a batch of circuit boards, but obviously, to be 100% the same, it is impossible, there are naturally some slightly individual boards, of course, this 'individual', the parameter difference will not be too big.

For example, the general board basically can't make calls at 14°C, but there are a few that can still make calls at 13°C or even at 12°C, but when it reaches 10°C or even lower, it will definitely not be able to make calls.

In everyone's opinion, this board should be the same, it is the kind that can be slightly resistant to low temperatures with a small probability.

However, Hu Dahai, who was standing next to him, his eyelids jumped, because this board had been tested by him before, and he remembered very well that when the temperature reached 14 °C, he couldn't call immediately, but now, ......