It's just that it will take some time for the two to start a business together, for example, Su Dingyu himself must go through some procedures first and obtain the appointment of the relevant departments before he can be in charge of the factory that is about to close down. To do this, he had to go home and report his plans to his father, who would agree before he came forward to greet the authorities.

And Jiang Xinwei's transfer also takes time, just like Hao Fuguo wants to transfer him, Su Dingyu also needs to go through a lot of procedures to transfer him, and even because it is a cross-departmental and cross-industry transfer, there are still a few more procedures.

In addition, Su Dingyu had to immediately ask the relevant departments to greet the personnel department of the Municipal Telecommunications Bureau, asking them not to handle Jiang Xinwei's transfer, and his transfer was handled by Shengli Electronics No. 2 Factory.

After eating for a while, Su Dingyu couldn't help but ask curiously: "Jiang Gong, can you tell me a little bit about how you repaired the telephone all at once?" I remember you said that those drawings are correct, so the problem must be in the assembly, right?...... , don't worry, don't worry about technical confidentiality, I'm not engaged in technology, I don't understand what you said, and it's impossible to sue Deng Xintian. ”

Jiang Xinxu smiled and asked, "Hehe, you kid doesn't have the technology and goes undercover in their development department?...... It's useless for you to sue them, because the fault of each phone is different, and it involves deep-seated technical problems, which are not at all what they can solve. If the fault is unified, and the reason can be explained clearly in a few words, how can Deng Xintian and Gong Jianliang be anxious?"

Su Dingyu also smiled embarrassedly: "I just want to understand the production process and arrange work in the future." Besides, I also went to high school and studied physics, so I guess I know a little bit. A lot of people in the company aren't as skilled as me. …… , Seriously, I'm very confused, if Deng Xintian and Gong Jianliang's skills are not good, they can't compare with you, I believe it, but they tried their best to find a few technical masters in the south, but they still didn't solve the problem, why?"

Jiang Xinxu said: "The first possibility is that the so-called masters they invite may not be masters, their level is low, and it is difficult to say what real masters can be invited to the south." The second possibility is that the person who came was just looking for the reason by comparing the drawings and the products you made, rather than studying the German telephone thoroughly. Even their root causes have not been thoroughly studied, and some of the parameters that must be mastered have not been mastered, how can the problem be solved in a short period of time, at most, it is just a matter of repairing several telephones.

The third possibility is that people are not interested in fixing your phones at all, but only want to sell you some drawings, or just want to make some money from you many times. ”

Su Dingyu nodded and said, "You're right, every time they come to look at our design drawings, they always point to some mistakes, but after changing them, they don't solve the problem." They also helped us repair a few faulty telephones, or encouraged Mr. Hao to buy their own drawings. …… However, Jiang Gong, I still wonder how can I not produce qualified telephones with the correct drawings?"

Jiang Xinwei said as a matter of course: "Having drawings does not mean that you have a qiē, it does not mean that you have mastered the core technology." Have you ever assembled a bicycle? The bicycle is simple enough, right? I believe that if you assemble it, you will be given a drawing, and you can assemble the car, but when you ride it, it will either sound here or there, or the two wheels will not be on the same plane, or the chain will be too tight or too loose, or even the crankset and chain guard will be scraped and croaked, which is obviously not qualified.

But experienced masters are different, and the assembled things sound crisply where they should sound, and there is no sound at all where they shouldn't. The chain is also not loose or tight, and it is very easy and flexible to ride. So why do you say?"

Su Dingyu said disapprovingly: "That's just that the master assembled a lot and pretended to be experienced." If I install a car for a few years, or dozens of cars, I will also become a master. However, the workers of the post and telecommunications equipment company assembled more than a few dozen telephones, and some installed nearly 100 telephones, but the result was still not good. I don't think it's necessarily a matter of experience. ”

Jiang Xinxu said: "I didn't say that it was just a matter of experience, but that having drawings was not a matter of qiē. …… When the blocks are stacked at a certain height, there will inevitably be some tilting, isn't it? So what do we do, do we put more weight on the other side of its tilt, deliberately deviate a little, and let their inclined center of gravity come over?

Now your company has mapped the drawings of the Germans, which is equivalent to taking pictures of the blocks that others have built with a camera, and then you start to build the blocks according to this photo, where you tilt it, where you should right, where you need to right, where you need to right...... right. Although the photo is correct, if you build it exactly the way someone else's way, the blocks may be so high, but how hard and troublesome it is, and how unreliable it is, isn't it? If you grasp the principle and know that the foundation of building blocks is to keep the center of gravity in a straight line, not only is it much less difficult, but the effect is much better. ”

Although Su Dingyu was very disgusted with Jiang Xinwei using these examples to illustrate the problem, he still understood what Jiang Xinwei meant, and said: "Yes, if surveying and mapping can master other people's technology, and surveying and mapping can make good products, then our country would have become the most developed modern country a long time ago." ”

Jiang Xinwei smiled and said, "You guy is very backward in thinking." Didn't you say that we have too many copycats?"

Su Dingyu heard the word "cottage" for the first time, but he still understood the meaning, he didn't bother to ask if the other party meant imitation, but continued to ask about the telephone: "Can you tell me how the two telephones were repaired today." You don't know, I saw you cut two resistors so lightly and solved the fault, and I was stunned at the time, are you still human?"

Jiang Xinwei put down his chopsticks and said, "It's not worth mentioning when you say it." On the first telephone, I cut out the voltage divider resistor, because the quality of the resistor was unqualified, and the actual resistance value was too different from the nominal resistance value, and the thickness of the copper sheet laid on the PCB was uneven, and the corroded circuit was too narrow when corroding and processing the circuit board, and the resistance value of the guide circuit was high.

Although the assembler assembles it completely according to the drawings, the actual resistance value of several factors is far greater than the design value and the required value, so that the voltage value assigned at the chip pin is higher than its allowable value, making the chip work unstable.

After measuring it with a multimeter, I thought it would be better to get rid of this resistor, and I could use the corroded circuit as a resistor.

As for the reason why the second telephone squeals because the circuit is self-excited, the resistor is supposed to be to ground the pins of the chip, so that its voltage is kept at zero. However, because of the poor quality of the PCB, the corroded copper sheet has a large resistance, forming a potential difference, and the output pin of this resistor brings the high-frequency signal leaked from the chip to the oscillating circuit next to it.

In fact, the pins of this chip are not sensitive to voltage, and it doesn't matter if it's zero or not, so I cut it out. The output of the high-frequency signal is cut off, and the screaming sound naturally disappears. ”

Although Su Dingyu is not a technician, he studied physics in high school and went undercover in the factory for a period of time, so this simple truth can naturally be understood. After listening to Jiang Xinwei's explanation, he said with admiration: "You are so good! You actually thought of the problem on the PCB, and found the source of the screaming sound at once." ”

……

After coming out of the hotel after eating, Su Dingyu first sent the motorcycle back to where he lived, and then rented a tricycle together to go to the long-distance bus station, and the two went their separate ways: Jiang Xinwei went back to his home in Shiqiao Town, and Su Dingyu went back to his parents' house.

Today's trip to the post and telecommunications equipment company can only be regarded as an interview, after returning home, Jiang Xinwei did not explain too much when facing his family, and the family also did not believe that God would suddenly drop the pie, so even the little sister with a lot of mouth did not ask too much, just asked him if he really gave up his love for Xiao Yuanyuan, and whether he really liked the girl surnamed Leng. kept asking if the girl surnamed Leng was his college classmate.

For the gossipy little sister, Jiang Xinwei was speechless.

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