Cheng Shuai lowered his head to weld the diode, and made a casual expression, "Who are you? I haven't seen you before." Pen & Fun & Pavilion www.biquge.info"

Wu Huan breathed a sigh of relief, thinking that he had met an old acquaintance that Hao Jun didn't want to contact the exchange partner, but fortunately he didn't know him.

Cheng Shuai began to be depressed in his heart, what's wrong with Hao Jun today? I thought he was here to joke and tease the boring man, but now it doesn't look like he is pretending, it can't be a "retreat" practice that has gone crazy, right?

Cheng Shuai raised his head and looked at Wu Huan, wanting to confirm whether he was really abnormal.

Wu Huan saw Cheng Shuai's gaze coming over, so he piled up a smile, "Handsome guy, my name is Hao Jun, I work as a security inspector at Changyang Railway Station, I like to study electronic gadgets since I was a child, I haven't been in contact with these things for a long time, I want to see if there is any business of repairing and transforming electrical appliances here to be proficient." I really don't want to be paid, nothing else, don't get me wrong. ”

Cheng Shuai sighed slightly in his heart, do you still use you kid to introduce yourself? You have been to my house for dinner no less than a hundred times, and I don't know what you are doing? Listening to this tone, it is similar to my mother, since my mother has Alzheimer's disease, she has seen some old neighbors and introduced herself seriously, you won't really have any problems in your brain, right?

Cheng Shuai was not sure how to deal with this unexpected situation, and decided to observe for a while.

Cheng Shuai pointed to the electrical appliances waiting to be repaired around, "There is a lot of work now, and the two people who came to help have gone out to repair the air conditioner." The fault of each electrical appliance here is written on the post-it note, you come in directly, the maintenance table over there is just empty, which one to repair first and then which one you can look at and do. ”

As soon as Wu Huan heard that he had work to do, he immediately came to his senses, walked in from the counter door, and looked at the post-it notes one by one, and Hao Jun's relevant memories came to mind.

Wu Fan was shocked, what a Hao Jun! Sure enough, it wasn't blown randomly! Just while looking at the failure, he already had all kinds of possibilities that might arise from the failure in his mind!

Eight of them can determine the cause of the failure, two need to be turned on and measured before the conclusion can be made, and only one cause is too complex and can take a lot of time.

Wu Fan is here to practice, of course, you have to start with the seemingly simple start to verify.

He had just opened the shell of an electric oven, and a middle-aged man walked in with a power amplifier in his arms, "Handsome guy, help me see what's wrong with this thing, they were singing and singing last night, and the sound suddenly became loud and small, and when it was big, it could deaf the ears." I didn't dare to touch the volume knob yet, and when I touched it, there was a rattling sound in the speaker. ”

Cheng Shuai glanced at it, "Put it on the counter, I'll screw these screws and go over." ”

"I see you have a lot of work here, or I'll put it here first, and I'll see it when you have time, anyway, I only use it at night." ”

"I'll tune it for you first, you take it back and try it first, if it doesn't work, you have to disassemble the machine and repair it." ”

As soon as the middle-aged man heard that it was desirable to wait immediately, he quickly put the amplifier on the counter.

Cheng Shuai finished the work at hand, found a needle from the drawer, smoked a little alcohol, walked over and pulled out the volume knob, revealing the metal rod of the volume potentiometer inside.

He placed the amplifier diagonally on the counter, pinched the metal rod with his left hand and turned it gently, and slowly poured alcohol along the metal rod with his right hand.

The middle-aged man couldn't help but ask: "The amplifier can also give injections?"

Cheng Shuai smiled and explained: "Alcohol is used to lavage its stomach. You use it almost every night, and the volume is adjusted quite frequently, the carbon film in the volume potentiometer will wear out, and then some tiny slag will fall, which is easy to cause a short circuit in the potentiometer, and when the volume is adjusted or the signal changes significantly, there will be noise or the volume is fluctuating. Alcohol washes these tiny dregs away, and in most cases returns to normal. ”

While talking, the alcohol injection was finished, Cheng Shuai continued to gently rotate the metal rod, feeling that there was no sense of obstruction, so he straightened the amplifier and pushed it in front of the middle-aged man, "When you walk back to your store, the alcohol will volatilize clean, you can just pick it up and try it, if it doesn't work, you can only disassemble the machine." ”

The middle-aged man happily took over the amplifier, "Ah, handsome guy, I'm really sorry, seeing that you won't be charged again, how can I thank you?"

"Okay, it's not a big deal, to be honest, I'm really busy today, and I still have to keep busy, so I won't talk to you. ”

The middle-aged man nodded again and again, and went out with the amplifier.

Wu Fan seemed to understand, "Handsome guy, no wonder I don't want to be paid, you have to let me take care of the food, it turns out that you are here to do public welfare, and Bai Xiu doesn't want money." ”

"What do you want? I don't want money, I can't go with my mother to ask for food?"

Wu Fan immediately made up the picture of the chubby handsome Cheng Shuai in rags holding an old lady begging along the street, doing good deeds to the point that he really couldn't bear to witness.

Wu Fan thinks that probably because the middle-aged man is an acquaintance, he doesn't charge, right?

Wu Huan has determined the reason why the electric oven trips when it is plugged in, which is caused by a short circuit caused by moisture at the wiring of the quartz tube, and the putty dust accumulated at the wiring and heat dissipation holes is cleared, and the plug-in experiment is completely normal after using a hair dryer to dry it thoroughly.

Cheng Shuai told him that the original post-it note indicated the reason for the repair, and wrote that it would cost 15 yuan.

Wu Huan nodded subconsciously, and sure enough, he only charged no fees for acquaintances.

As soon as the store door opened, a little fat man came in, holding his mobile phone and asking Cheng Shuai and Wu Huan: "The sound of the earpiece of the mobile phone suddenly became smaller, how long will it take to repair?"

Cheng Shuai replied: "Then we have to see what is wrong." ”

"How much does it cost at most?"

Cheng Shuai saw that Wu Fan had already screwed the screws of the electric oven, so he asked him to go over and see what was going on with the phone.

Wu Huan had a handset in his hand, and Hao Jun's memory told him that the magnetic particles adsorbed on the surface of the earpiece had reached the number of obstructions to the call.

But Wu Huan was not sure about the bottom line of Cheng Shuai's profits, and Hao Jun's memory told him that some electronic maintenance departments would exaggerate the failure and overcharge.

Before Wu Fan could determine how to communicate this situation with Cheng Shuai, Cheng Shuai asked him first: "Is the surface of the earpiece too blocked?" ”

Wu Huan felt that Cheng Shuai had no intention of making black money, and immediately replied yes.

Cheng Shuai said to the little fat man: "Usually the dust in your pocket will also be adsorbed on the earpiece, but it will not suddenly become quieter. I noticed that you have some shiny powder on your body, did you go to the powder metallurgy plant in Xishan? It is estimated that there is too much dust in the machining process of the powder metallurgy plant, which is adsorbed on your mobile phone earpiece, take a look at it. ”

The little fat man nodded in agreement, and watched with straight eyes as Wu Huan pulled the tip of a needle into the groove of the earpiece, and it was stained with a bunch of magnetic powder.

Wu Huan wiped off the magnetic powder with a paper towel, scratched it again, and then stained it with a bunch of magnetic powder, and then wiped it off with a paper towel.

By the fourth time, there would be very little magnetic powder.

Wu Fan handed the mobile phone to the little fat man and asked him to call any friend or call hotline to compare the effect.

After the little fat man tried it, he was sure that the sound was back to normal.

The little fat man saw that Cheng Shuai was the boss, so he asked with a smiling face: "Boss, I just pulled it with a needle a few times, and I can't collect a few yuan, right?"

Cheng Shuai looked up at him, "Just pull with a needle a few times? It's worthless to pull with a needle, but what is valuable is that you have to know how to pull with a needle, and you have to master the strength of the stroke, and you accidentally stab the earpiece to break it, you know? I think that a precision motor of Ford Company had a failure and could not be solved, so I invited scientist Steinmentz, who quickly drew a line on the motor with chalk, and asked them to remove 16 coils at the position where the line was drawn, and the motor was really running normally. Stanmentz charges 10,000 yuan, and the people in Ford exclaim that they charge 10,000 yuan for drawing a line! Stanmentz said that a drawing line is only worth 1 yuan, and he knows where to draw a line for 9,999! Also, don't call me boss, call me a handsome guy!"

The little fat man hurriedly changed his words, "Handsome guy, I know, how much should I give you?" However, don't tell me 9999! I'll be in a hurry with you!"