The three of them walked out of the library, and when they locked the door, Du Qiu and Su Wenxiu's brother got to know each other and knew that his name was Su Wenhai, so they almost said: "There is a road in the book mountain, there is no end to the sea of literature, Brother Hai has a good name, it is much better than my dry autumn character." Pen Fun Pavilion wWw. ｂiquge。 ｉｎfo”

"What's the use of sounding good, I didn't get into high school for two years in my third year of junior high school, so I should actually change my name to Wenzha. Su Wenhai was very cool and not pretentious, and said with a smile after laughing at himself: "If you like it, I'll sell you the name, just one dollar." ”

"Brother Hai's kindness has been understood, I lack fire in my five elements, and there must be fire in my name, not water. ”

Su Wenhai was obsessed with Du Qiu's thinkpad, and after Su Wenxiu locked the door, he walked towards the elevator and said, "Dude, if your laptop computer can't be repaired, can you sell it to me cheaper?"

"Brother Hai is engaged in the computer industry?"

"As far as my half-baked junior high school education can do computers, I am a repairer of household appliances, and now the price of computers is falling rapidly, and every household will definitely have it like a TV in the future, so I want to study it first. ”

This guy is very business-minded......

The moment he walked out of the library door, a cold wind blew, and his body was cold, Du Qiu couldn't help but shiver, he rubbed his bare arm, looked around at the familiar and unfamiliar campus in the night, and then took a deep breath and asked tentatively: "Brother Hai, can I go to you to borrow it for a night?"

"Why don't you go back to the dorm?"

"It's more than 12 o'clock now, and the dormitory building has long been locked, and I had a conflict with the doorkeeper a few days ago, and I can't pull my face and beg him to open the door. Du Qiu forcibly showed off his acting skills, shrunk his neck, and said with an embarrassed smile: "I have never been wronged since I was a child, I have a better face, and I am used to pretending to be the boss who usually shouts five or six, but I am so embarrassed tonight, I can't let those classmates know what to say." ”

In 1995, China was still in the initial stage of economic take-off, residents' income and quality of life were relatively low, far from being compared with 2016, although Du Qiu's T-shirt and shorts were not high-end goods, but the materials were exquisite, cut decently, and looked fashionable, coupled with the expensive laptops in the backpack, it naturally made the Su brothers and sisters think that he was a rich child with a superior family, and it was not strange that rich people love face, so they did not suspect when they heard this, Su Wenhai and Su Wenxiu glanced at each other, and saw that she did not object, so they said: "Our house is relatively small, there are no extra beds, if you don't dislike it, squeeze in with me tonight. ”

"Thank you, Brother Hai, and thank you, Mr. Su. ”

"What kind of teacher is Su, just a yellow-haired girl, she only celebrated her 20th birthday in July this year, she is definitely not as old as you, you can just call her by her name." ”

"Brother, what are you talking about......

The Su family brothers and sisters live in the faculty dormitory building provided by the school, the area is not large, one bedroom and one living room, there is no kitchen, but there is an independent bathroom, about 60 square meters, whether it is the building itself or the decoration style is some years, it looks very old, there is a desk in the living room modified workbench, which is full of messy parts, next to the TV, washing machine, video recorder and other different kinds of old electrical appliances, making the whole house look messy and crowded.

Su Wenxiu didn't say much, but he was very considerate, as soon as he entered the house, he poured a cup of hot water for Du Qiu, and then found a set of thermal underwear and came out, saying: "This is what my brother just bought a few days ago, and he hasn't worn it yet, he is not as tall as you, he may not fit well, you can make do with it first." ”

"Thank you, Mr. Su, thank you so much. ”

It's really not very fit, Du Qiu is relatively tall, with bare feet of more than 1.8 meters, Su Wenhai is only in his early 1.7 meters, his clothes are two yards off, and he is tight on his body, but now some of them are good to wear, and he can't ask too much, when he was dressing, Su Wenxiu avoided suspicion and went back to the back room to rest, and Su Wenhai pulled away the half-new sofa in the living room, spread it out into a bed, and then hugged a quilt and came out, saying: "If you are sleepy, sleep first, I still have a little work to do." ”

"What does Brother Hai want to repair?"

"VCD player. Su Wenhai pointed to the black box on the workbench and said, "It's the first time I've repaired this thing, it's not the same as the video recorder, and I didn't do it all night." ”

VCD came out in 1993, swept the country in 1996, and was eliminated after 2000, Du Qiu was born in 1990, and his childhood coincided with the rapid development of VCD machines in those years.

"I don't read the disc after loading it. ”

Du Qiu was extremely excited at this time, his brain cells were boiling like boiling hot water, and he didn't feel sleepy at all, so he stood next to the workbench and watched, and saw Su Wenhai poking east and west on the circuit board, seemingly clueless, and asked, "Isn't there a maintenance manual?"

"This is a second-hand item that I bought back, except for the machine, there is nothing, let alone a maintenance manual, not even an instruction manual. Su Wenhai said while measuring the level with a multimeter: "VCD machine is a high-tech product that has just come out, and it is rare on the market. ”

VCD is a high-tech product......

Du Qiu has never repaired VCD, but he has tinkered with DVD, the main difference between VCD and DVD is that the decoding ability is different, and the circuit structure is similar, he observed for a moment and then pointed: "Brother Hai, if you don't read the disc, either there is a problem with the laser head, or there is a problem with the servo control circuit in the movement, so you don't need to check the decoder." ”

"Do you know this?" Su Wenhai was a little surprised when he heard this, looked up at him, and said: "I have checked the laser head, it is normal, which part of the servo control circuit are you talking about?"

Du Qiu pointed to a position and said, "You measure the RF pin level of this single-chip microcomputer...... If the level is high, the RF output is abnormal...... You test the RF amplifier again and see if there is any signal output...... Is there a signal? It should be a problem with the focus detection circuit......"

One said, one did, and soon found a coupling capacitor damaged by leakage on the circuit board, and after replacing it, connect it to the TV, and try it with a karaoke disc, sure enough, Su Wenhai was very excited, regardless of the dead of night, holding a screwdriver as a microphone, and singing with Andy Lau on TV: "Don't you dare not want to, thank you for your love, I have to exist......"

After singing for a while, Su Wenxiu walked out of the room with an old hand-knitted sweater and a pair of blue sweatpants, glared at Su Wenhai, and said, "Brother, you don't look at what time it is, don't sleep yet!"

Su Wenhai doted on his sister very much, and obeyed her, immediately stepped forward and turned off the TV, and said with a smile: "Go to sleep immediately." ”

Su Wenxiu snorted lightly, put the clothes on the sofa bed, and said to Du Qiu: "My brother is a night owl and sleeps late at night, you wear these two clothes first, be careful of catching a cold." ”

What a blessing......

As soon as I crossed, I met such an enthusiastic, caring and careful girl......

After Su Wenhai waited for his sister to return to the house, he moved the VCD machine back to the workbench and asked with great interest: "Dude, how did you know that it was broken there?"

Du Qiu thought that he couldn't sleep anyway, so he would just do something small to repay the friend who took him in overnight, so after putting on his clothes, he opened his backpack, took out a pen and notepad from it, drew a schematic sketch according to the circuit board, and explained: "The DVD player is generally composed of four parts, namely the disc drive, the movement circuit, System control and decoder, of which the disc drive part is relatively simple, Haige can understand at a glance, I won't say more; the decoder is packaged, broken can only be replaced, can not be repaired; as for the system control part, it is mainly a single-chip microcomputer......"

"I've often heard people talk about the microcontroller, but I never understand, what is it?"

"The full name of single-chip microcomputer, also known as microcontroller, is a microcomputer that integrates the central processing unit, memory, timer, counter and various input and output interfaces on a circuit chip. Du Qiu explained the basic concept, and saw that Su Wenhai looked confused, as if he understood or not, and then said: "Understanding single-chip microcomputer requires a certain amount of computer knowledge, we will talk about it later, now let's talk about the movement circuit first, most of the circuit failures of the VCD machine come from here." ”

"Okay, listen to you. ”

"The movement circuit cannot be produced in China, so it can only be bought from foreign companies such as Sony or Philips, which contains three sub-functions, one is photoelectric signal processing, one is digital signal processing, and one is servo control circuit......"

After graduating from Du Qiu's bachelor's degree, he went out for two years, and he was too tired to work, so he ran back to the school to study for graduate school, which is regarded as an art investment teacher, and the level is much higher than that of ordinary graduate students, so he often replaces the tutor to give lessons to the younger students who have retaken the course, and has accumulated a lot of teaching experience。

"Brother, didn't you two sleep all night last night?"

Du Qiu looked back and saw Su Wenxiu wearing a peach-colored knitted sweater, standing at the door of the bedroom prettyly, like a flower bone in early spring, filled with the unique youthful atmosphere of a girl, although it was not stunning, but it was also pleasing to the eye, very moving, he got up and said hello, and asked, "Teacher Su, what time is it?"

"It's almost 7 o'clock. ”

"It's almost time for me to go. ”

"Today is New Year's Day, the whole school is on holiday, why are you in such a hurry to leave, have breakfast together. Su Wenhai grabbed Du Qiu and said to Su Wenxiu: "Little sister, you cook porridge in a pot, and then go buy a few steamed buns and come back, this guy taught me a lot last night, I have to thank him." ”

Du Qiu tossed all night, he was already hungry, and now he was penniless, and he naturally wouldn't let go of a free breakfast, so he stayed down the river and helped Su Wenhai clean up the circuit boards scattered on the table.

When Su Wenxiu came back from buying steamed buns, he brought a new toothbrush and a new towel, which made Du Qiu very grateful, because he had a slight cleanliness habit and didn't sleep last night, half because he was really not sleepy, and half because he was not used to squeezing a bed with a strange man.

"Brother Hai, can you lend me a few coins? I'll take the bus directly to send the computer to be repaired, and by the way, hide at a relative's house for a day, and then go back to the dormitory tomorrow to scare those bad friends." ”

"Dude, you're really interesting, you don't forget to save face when you're frozen like this. Su Wenhai laughed, took out a handful of banknotes of different denominations from his pocket, counted 20 yuan to him very boldly, and said: "Laptops are valuable things, you'd better take a taxi, there are many people in the bus, and there are many thieves, so it is easy to be stolen." ”

"Thank you, I'll wash this clothes tomorrow and return it to you. ”

"It's okay to play whenever you want, I still have a lot of things to ask you. ”