Xu Hongwen, who has rare metals, made a private appointment with the school the next day, because it was a private use of the real room, Xu Hongwen also paid a fee to the management office of the real room, and Xu Hongwen was scheduled to be a week later after the appointment.

Xu Hongwen started to engage in LED after he was also busy, borrowing the school's channels to buy a variety of required real materials and electronic components, for a while Xu Hongwen, who was not in the real room, first made LED transformer power supply, as long as there was nothing special in the school, Xu Hongwen stayed in the store and was busy with his own.

In the past two days, Xu Hongwen officially reached a cooperation with the telecommunications business hall of the Post and Telecommunications Bureau, and the business hall received the "friends" of Brother Xiu and their private brought, plus the individual customers in his store, more than ten big brothers should be repaired in one day, and the huge profits of the big brother made the daily income of the store quadruple at once, although Xu Hongwen made a lot of money, but also new problems.

Some big brother maintenance does not need to replace any new parts, but there are a few big brothers on the parts are broken, and the parts that cannot be repaired can only be replaced, but Xu Hongwen is simply a clever woman who is difficult to cook, some small components of resistors and capacitors are good to say, but the chips on the motherboard are burned, and the display screen is broken, the shell is damaged, etc., all need to be replaced with new parts, but these are not sold in Haizhou at all!

After encountering this situation, Xu Hongwen, who couldn't see that he didn't make money, took advantage of the weekend to catch the first flight and flew to Kyoto, and took a deep breath of Kyoto air after getting off the plane at Kyoto Airport.

Xu Hongwen, who had just gotten off the plane, rushed to the hall and bought a ticket for the last return flight of the day, and after buying the ticket, Xu Hongwen went out of the airport hall, and Xu Hongwen in the hall saw dozens of taxis soliciting customers parked in the square outside, so he casually called a car and asked the master to drive directly to Zhongguancun.

Xu Hongwen, who got in the car, finally saw Kan Dashan, a taxi driver in the capital, and the current political dignitaries came at hand, and from time to time he could say one or two jokes that made you laugh, although Xu Hongwen who was sitting in the car felt that this master was too good to speak, but this person was still very enthusiastic, and pointed to the scenery outside the car from time to time to introduce Xu Hongwen.

Xu Hong, who paid to get off in Zhongguancun, waved away the taxi, and then turned around and entered Zhongguancun, which is known to everyone in later generations as an electronic distribution center, even if Zhongguancun is now a prosperous place, the country approved the establishment of a high-tech development pilot zone in 1988, surrounded by a number of national key universities such as Beijing University and Huada, as well as a variety of state-level real yàn rooms and research institutes are countless, here is the most concentrated place for high-end talents in China.

Walking into Zhongguancun, at this time, Zhongguancun did not have the kind of tall and tall in later generations, many of them were built in the seventies and eighties in the Soviet style buildings, but here there are the most complete electronic equipment in China, and all kinds of imported electronic components, there are formal channels to come in, and there are smuggled in!

Xu Hongwen, who walked into Zhongguancun Street, walked over and walked to a stall selling big brother, he saw that there was also a big brother in the store, and saw Xu Hongwen, who was walking in the store, and a person in his thirties greeted him in the store.

"Boss, do you want to come and see Big Brother?"

"Come in and have a look!" After walking into the store, Xu Hongwen glanced at it, there were more than 20 big brothers in the cabinet in the store, which were more spacious than the business hall in the Haizhou Post and Telecommunications Bureau, and the big brothers with more than 20 units were worth hundreds of thousands.

After glancing at it, Xu Hongwen didn't hide it, and said to the man with a smile: "Boss, I am also half of your peers!" ”

Zhang Hei, who was sitting in the store, saw someone entering the store, got up and went out, and when he saw that it was his colleague, his face was a little ugly and said, "Dude, are you here to tease us?" ”

Xu Hongwen, who didn't want others to misunderstand, explained: "Don't be nervous, I'm the big brother of Xiu in the East China Sea, and I have no competition with you at all!" ”

At this time, Zhang Hei's face looked better, and after smiling, he said, "Oh, you are from the East China Sea, what are you doing?" ”

There is a way that peers are enemies, but Xu Hongwen doesn't think so, money is inexhaustible for a person, and he is just a passerby in Zhongguancun, Xu Hongwen also believes that the other party will not treat him as a competitive opponent, Xu Hongwen, who originally wanted to inquire about a matter, took out a pack of Great China, sent one and said: "I came here this time, I want to buy some big brother accessories in Zhongguancun, I don't know that there are some in there!" ”

Xu Hongwen also handed out a cigarette to the master behind the repair table as he spoke, "Master, you smoke one too!" "Thank you!"

Zhang Hei, who heard this, did not doubt him, Zhang Hei, who had been doing business for almost ten years, still had a very good set of people, and Zhang Hei was making big brother accessories, but these big brother accessories were all goods, and they were not put on the table at all, Zhang Hei, who was used to business, would not push this business out at all, thinking that this person just said that he was a big brother Xiu, Zhang Hei, who did not answer, asked tentatively: "Brother, I just said that it was a big brother who repairs, I have a big brother here without a sound, and I haven't found out that there is a problem there, Can you help me take a look! ”

Xu Hongwen is not a fool, of course, he can hear that this is someone to find out if he has this ability, or they all say that this person can't trust him at all, and wants to touch his bottom! How could Xu Hongwen be stumped by a small problem, the problem of big brother's lack of sound is generally due to the speaker and earpiece, but he also knows that others will not talk about a small problem, if it is not a loudspeaker or earpiece is broken, then the problem is relatively tricky.

Xu Hongwen didn't think much about it, just asked calmly: "It seems that there is no problem with that big brother's loudspeaker and earpiece!" ”

Just this sentence, Liu Hei knew in his heart that this person was really his own companion, and only then did he really smile on his face, and Zhang Hei, who had always been cautious, still said: "Haha, fellow believer, I'll take out that big brother for you to see!" ”

Xu Hongwen, who took over the big brother, fiddled with it, there was indeed no sound, Xu Hongwen, who was asking for help, thought to himself, after helping him repair this big brother, he would ask someone to speak, thinking of this, Xu Hongwen said: "Can you borrow your repair table for use!" ”

"Okay, whatever you want!" Saying that, Liu Hei asked the people in the repair table to give way.

Seeing that people get out of the way, Xu Hongwen was not polite, after sitting down, he dismantled the big brother neatly under the gaze of these two people, after dismantling it, Xu Hongwen used the power supply to test the sound of the speaker and the earpiece, after connecting the power supply to the motherboard, when the ringtone was played after booting, he measured the voltage on the speaker, and it was displayed as zero!

This shows that there is no sound signal input at all, it is very likely that there is a problem with the sound chip, but it is not absolute, Xu Hongwen touched the sound chip with his fingers, and the surface of the chip is not abnormally heated, which shows that the possibility of the chip being bad is very small, Xu Hongwen measured the sound signal on the output input circuit of the sound chip again, and found that the problem was on a diode.

After Xu Hongwen, who found the reason, put down the tool, he saw that the two people were looking at him with curiosity, pointed to the burned diode and said with a smile: "The problem has been found, it is this diode that burned!" ”

Zhang Hei was also surprised, but he didn't expect that the problem that had been difficult for the two of them for a few days would be found out in a few minutes in the hands of this person, and Zhang Hei, who was a little unconvinced, said: "Is it really a problem here?" “

"Haha, do you have such a diode, or remove one from a waste motherboard!"

"Yes! Yes! As he spoke, Zhang Hei turned out a rotten motherboard and gave it to Xu Hongwen! Collect!! Ask for a recommendation!! Thank you