The printed circuit board of the indoor unit is faulty. Detection method: Check the data from E2PROM. Although the printed circuit board assembly industry has shown good momentum recently, do not blindly follow the trend. In addition, E2PROM data often involves circuit board issues and replacement of machine components.
The global material industry supply chain involves almost all materials, including organic luminescent materials, flexible display materials, chemical reagents, and packaging materials.
Therefore, the key to determining market share lies in interconnect design. To maximize the added value of performance, it is necessary to improve the performance of connectors, such as the design of synchronous electronic devices, and optimize the structure to meet the performance requirements of nodes, followed by correct and reliable connections and welding.
In addition, the quality level of connectors usually refers to the square root of their total weight or insulation constant, and due to the insulation strength and minimum displacement of contacts or input/output, after several years of use, smaller metallized holes (such as non-metallic fillers or poly-ruma metal solder) should be used to produce reliable products. In the most critical field of electronics, the manufacturing processes and engineering used in communication and power products are all based on the manufacturing process of PCB materials that can be made, all of which are designed to enable the use of PCBs. Although it is a PCB circuit board, the production process of the PCB board is generally similar, but the PCB also requires everyone to do the production process. Below, the PCB circuit board manufacturer will introduce its basic process and different PCBs, mainly including PCB drilling, PCB circuit board, PCB through-hole, PCB circuit board surface treatment, etc. The overall production process of circuit boards focuses on Priflow, while single sided PCB boards do not have double-sided circuit boards. The production process of double-sided PCB boards requires experience as a production engineer, proficient skills in PCB procurement engineers, skilled skills in PCB sampling engineers, proficient PCB solder resistance and double-sided circuit board manufacturing processes, and skilled introduction to PCB circuit board production processes.
However, many people have not taken the internal processes of PCB circuit board factories seriously, so it is difficult to know whether their strength in these areas can meet our requirements, from where to where, so that we can have a real-time understanding of the entire situation and understand how it has direct value for a certain quality circuit board. So what exactly is weldability?
At the same time, there must be a foundation for communication and exchange between the quality requirements and appearance requirements of the entire product. This is also why there are some highlights in the production of circuit boards, in order to ensure good product quality and bring relatively fair competition results to customers.
So, in order to ensure quality, produce high-quality circuit boards, and do a good job in the manufacturing process, it is necessary to have a deep understanding of these factors in order to ensure the quality of circuit boards.
The flying needle test is a commonly used so-called caliper test by circuit board manufacturers at present. Its main purpose is to determine the required quantity based on electrical planning. The test data is pressed onto the Metad1 format of the circuit board (about a few uintbits), and the test rack sets the actual ID of the circuit board to "0"; Design the ID of the circuit board as a library weight, automatically measure the drawn circuit board graphics, determine the position between the test frame and the board, and manufacture the test fixture; Finally, compare the annotated information of the test with the test results and analyze the cause of the fault; Not subject to internal damage; Special software and hardware technologies must be adopted to ensure the reliability of PCB circuit boards; Only after fault replay can the fault location of the designed circuit board be determined;
Different tests on the test frame () will result in different faults. If the design is not correct, some faults may occur, and the test frame used is not connected to the circuit board correctly;
Due to poor soldering characteristics and the possibility of poor soldering, it is important to cultivate the habit of separating residents when setting test points;
● Confirm whether the instrument status is normal: When the transformer is not turned off, pay attention to manually confirming whether the switch is turned on;

● Confirm if the instrument has "output", please confirm "resistance", please confirm "output", please confirm "high resistance", please confirm "switch", please confirm "low resistance", please confirm "wire", please confirm "other wires", please confirm "test wire", please confirm "other conductor materials", please confirm.