The price of a new tape walkman in Japan is at least about 1,000 yuan in China, and Duan Yun said that it will be dismantled, which seems a bit too extravagant.

But this is the case with technical research, which requires a lot of investment, and Zhao Xuewu has disassembled more than a dozen new domestic tape recorders before the institute, and if they want to learn other people's technology, they have to pay tuition.

The Walkman that Duan Yun bought was a new Walkman cassette player from Sony at the end of last year, and the first batch of this new product was just a single player, and the next few batches of products added recording functions, and the size became smaller and smaller.

And the Sony Walkman in Duan Yun's hand is just a single player, with a black aluminum alloy shell, and a very good texture, it is definitely a product full of science and technology in this era.

Gently disassemble the shell with a screwdriver, the mechanical part and the circuit part are perfectly combined, although it looks complicated, but there is no sense of clutter, the structure is quite compact, almost perfect use of every inch of space.

In fact, when Duan Yun was young before, he also participated in a domestic Walkman, which he bought in the late 90s and spent a whole month of his breakfast money.

However, the impression that the domestic walkman brought to Duan Yun was not good, it was very power-intensive, two batteries could only listen for three hours at most, and the noise was relatively loud, and the sound quality effect was very average.

A few years later, there was a little problem with this Walkman, Duan Yun wanted to try to see if he could repair it, but after opening the plastic case, he found that the circuit board and structure inside were very rough, the parts were basically soldered by hand, and the solder joints of the solder were a little mottled, like a lump of pasted on it.

The internal circuit board welding of this Japanese Walkman is very beautiful, the soldering point is bright and uniform, obviously it should be machine welded, and the entire circuit board is very integrated, and a lot of integrated chips are used on it, including power amplifier chips, electronic control chips, infrared sensors and status switches, as well as electromagnet control movements, these chips and parts are currently unable to be produced in China.

In fact, this model of Sony's Walkman belongs to the 3rd generation of products, and it is a global leader in terms of design functions and product performance.

If Duan Yun wants to switch from making tape recorders to producing walkmans in the future, he needs to solve many technical problems, and the methods adopted are roughly as follows:

The first is the use of new micro-miniature components and new integrated circuits, which can greatly reduce the area of the circuit board.

The second is to improve the structure, reduce the mechanical parts as much as possible, and make each part multi-functional, such as using the cassette spindle as the button, locking the tape cartridge between the reel shafts, and directly driving the motor.

Then there is the use of new assembly processes, such as the so-called RHC (radio, high-density circuit) process for Japanese products to assemble the Walkman, using thick film circuits, multilayer ceramic capacitor networks, three-dimensional assembly on printed circuit boards.

Finally, it is the use of low-voltage power supply, due to the reduction of the transmission mechanism, so the low-voltage drive system can be used, generally with a three-volt power supply, and some only need a small battery, that is, a 1.5-volt power supply.

And these process technologies have not been realized in China until the mid-90s, with the current level of domestic electronics industry development technology, Duan Yun wants to make the same high level of Walkman as Japan's Sony company, there is almost no possibility.

In fact, the earliest domestic production of the Walkman are a simplified version of the single player, because it is impossible to produce highly integrated circuit chips, and must reduce the cost price, so the domestic manufacturers in the early 90s produced the domestic Walkman only has the function of the single player, the circuit board uses ordinary electronic components, because there is no integrated circuit board as lightweight, so the whole machine appears very thick and heavy, in order to reduce the weight, and have to use a plastic shell, so that the quality is very poor, and it does not fall.

If Duan Yun wants to produce a domestic Walkman, he can only use a large number of large electronic components to simulate the functions of Japanese integrated circuits, which is also helpless.

If there are too many parts on the circuit board, it will be very difficult for workers to manually weld these parts, which is not only inefficient, but also very difficult to ensure the pass rate of the circuit board.

In addition, there are many technical details that need to be broken through in the mechanical transmission part of the Walkman and the core head, and Duan Yun still has a long way to go if he wants to complete the development and production of the domestic Walkman.

It took Duan Yun an afternoon to disassemble and analyze the Walkman, and then operated the computer and used CAD software to draw the circuit diagram of the Walkman, including the drawings of the mechanical transmission of the tape compartment.

After returning to his home in Shenzhen for dinner in the evening, Duan Yun came to his study and began to continue his research on the Walkman.

His wife, Cheng Qingyan, was in another house dealing with the factory's affairs.

Now the couple has a division of labor, Duan Yun mainly focuses on product technology research and development and public relations with contacts, while Cheng Qingyan is responsible for the daily management of the electronics factory and machinery factory.

Like Duan Yun, Cheng Qingyan has been very busy in the past two days, she works in the factory in Shenzhen during the day, dealing with some daily chores in the factory, and after returning home at night, she began to study the establishment of the Tianyin Electronics Manufacturers Association.

The enterprise chamber of commerce is a very common sales model in later generations, but in this era, it is not easy for Cheng Qingyan to implement the enterprise chamber of commerce system.

First of all, the product type of his electronics factory is relatively single, Tianyin subwoofer has only three types of high, medium and low grade so far, although it is a brand-name product, but due to the increasing number of similar products on the market, various manufacturers are desperately reducing prices, so the competitiveness of Tianyin audio products is gradually weakening.

Later generations have the ability to set up a chamber of commerce composed of distributors around the industry are all rich in product categories, well-known brand effect, and excellent product quality, and Tianyin Electronics Factory only three models of chassis, so few types of goods can not attract franchisees to join, and after the establishment of this chamber of commerce, the products provided to the distributors must be cheap and attractive enough, so that the dealers are profitable, is the key to the establishment of the Chamber of Commerce.

Moreover, the current domestic sales channels mainly rely on state-run shopping malls and stores, and it is impossible for these state-owned shopping malls and stores to sell only the products of Duan Yun's company, so there are not many people who really have the financial resources and strength to become Tianyin electronic distributors, which means that Cheng Qingyan's plan to establish a chamber of commerce is difficult to achieve in the short term......