"Forest worker, it's quite punctual!"

Guo Yonghe greeted him with a smile and said to Lin Wenhai: "It only took you fifty-nine minutes to come out in the equipment maintenance department, you must have repaired the printed circuit board?" ”

"Bah, schadenfreude bullshit!"

Lin Wenhai spat at Guo Yonghe fiercely, "If you have the ability, you can go in and show me the repair!" I don't believe it at all, even I can't fix things, you bullshit little technician can fix it! ”

"Huh!"

Guo Yonghe shrugged his shoulders with a smile, "There are more things you don't believe!" Since you're not convinced, just stare at your dog's eyes and wait outside to see how I fix the printed circuit board! ”

Saying that, Guo Yonghe turned his head and said to Li Weijin behind him: "Director Li, let's go first to see what the situation is?" ”

"Good!"

Li Weijin nodded.

Things have come to this point, and he definitely has no reason to back down.

Anyway, it turns out that Zhang Jianjian's nephew has not been able to repair the printed circuit board of the industrial computer, so even if Guo Yonghe, who he invited, can't repair the printed circuit board like Zhang Jianjian's nephew in the end, there is nothing to be ashamed of!

"Section Chief Hu, you and Dongqiang will wait outside for a while, and I'll accompany Expert Guo to go in and see what's going on."

He gave Hu Changzheng an explanation.

Although Hu Changzheng wanted to watch Guo Yonghe's repair of the printed circuit board on the spot, he also knew that it was really inappropriate for the father and son to follow up in this situation, so he pulled Hu Dongqiang to wait in the corridor outside.

"Expert Guo, let's go in!"

Li Weijin took a long breath, calmed down his excitement, and led Guo Yonghe into the equipment maintenance department this time.

In the equipment maintenance department, Zhang Jianjianzheng, Section Chief Tang of the equipment maintenance department, and several engineers sat at the workbench, looking at the large printed circuit plug-in board placed on it, helpless.

"Director Zhang,"

Li Weijin walked in front of Zhang Jianshe and asked, "Since Lin Gong can't repair the printed circuit board, why don't you let me invite Guo Expert to give it a try?" ”

"Director Li,"

Zhang Jianshe sighed and said, "The maintenance and repair of equipment is originally within your scope of responsibility. If you want Expert Guo to try it, can I still stop you? ”

As he spoke, he pointed at Guo Yonghe and said to Section Chief Tang: "Old Tang, this is the Guo expert who Director Li specially invited to help our factory repair the printed circuit board, you can introduce the situation to him in detail, and see if there is any way for the Guo expert invited by our Director Li to come over." ”

Section Chief Tang looked at Guo Yonghe's excessively young face, and his heart was full of doubts.

You know, Zhang Jianjian's nephew is an engineer from Beijing Computer Factory No. 1, and even he is helpless against this large printed circuit plug-in board.

However, since Zhang Jianshe confessed, and Expert Guo was specially invited by his top boss Li Weijin, Section Chief Tang had to cheer up at this time and introduce the failure of the printed circuit board even if he didn't believe it in his heart.

"Director Li, Expert Guo, in fact, the cause of the failure of this printed circuit plug-in board has been investigated."

Section Chief Tang said: "It is caused by the disconnection of the magnetic circuit under a PLCC. In order to fix this fault, our factory is currently facing two problems: first, how to safely disassemble this PLCC; Second, due to the lack of special micro precision welding equipment and special solid soldering paste required for welding fine magnetic circuits, the technology can safely disassemble the PLCC, and the repair of the open circuit magnetic circuit cannot be completed! ”

After finishing speaking, he stared intently at Guo Yonghe, ready to see what kind of reaction the young Guo expert would make.

"Huh,"

Guo Yonghe laughed after hearing this, and said, "It turns out that you were stumped by such a simple question? I thought it was a big problem, but I didn't expect it to be such a simple problem! ”

"What? You say it's a simple question? ”

Section Chief Tang's eyes widened in surprise.

"It can't be said to be simple, score people, look at whom!"

Guo Yonghe shrugged his shoulders and said, "For example, this question is not simple for me, but very simple. ”

"What? Very simple? What a shame! ”

Zhang Jianshe couldn't hold back anymore, pointed to the PLCC marked on the printed circuit plug-in board, and said to Guo Yonghe: "Expert Guo, then you can talk about it first, how to remove the PLCC on the fine magnetic circuit of the broken circuit!" ”

The so-called PLCC, the full name of Plastic Leaded Chip Ca

ie

, is a plastic chip carrier with leads, and is an integrated component with an integrated chip.

The printed circuit board of the industrial computer belongs to the large printed circuit plug-in board, and the PLCCs on it are very dense, the distance between them is very small, and they are densely and soft-brazed on the circuit board.

Before the mid-80s, foreign countries usually adopted the forced air flow convection heating method to melt the soft brazing joint of the PLCC, and then disassemble the PLCC.

This operation is extremely cumbersome, and it tests personal skill and patience, and few people can do it except for some master-level professional restorers abroad.

Until the end of the 80s, Wilo of the Federal Republic of Germany developed a special disassembly and installation brazing equipment for PLCC, which can use the temperature control device in the equipment to heat the soft brazing point to 210 degrees Celsius, so as to achieve non-damage disassembly of PLCC.

However, this kind of special equipment produced by Wilo is not only expensive, but also has a small output, and has not been introduced in China at all. In this case, how can Lin Wenhai and these engineers from the equipment maintenance department safely disassemble the PLCC?

Zhang Jianshe had heard Section Chief Tang give a detailed explanation just now, so it was very simple to listen to Guo Yonghe at this time, and he couldn't help but question Guo Yonghe.

"Hehe, Director Zhang is really a good plan!"

Guo Yonghe sneered, "I didn't even talk about the maintenance fee, I just wanted to get the maintenance plan out of my mouth." Do you think I'm young and think I'm easy to deceive? ”

"You, you, you!"

Zhang Jianshe was choked by Guo Yonghe and couldn't speak.

Conscience of heaven and earth!

He didn't have the idea of Guo Yonghe's maintenance plan at all, but just questioned that Guo Yonghe couldn't disassemble the PLCC safely!

"Okay, Expert Guo, don't get me wrong, our Director Zhang definitely doesn't mean this!"

Li Weijin couldn't watch Zhang Jianshe get angry, so he hurriedly stood up and played a round, "Regarding the maintenance cost, how much do you think is appropriate?" ”