Guangzhou trust automatic equipment ltd
The application of circuit boards has become increasingly extensive, with small electricity, up to the size of industrial equipment, the core control parts of which consist mostly of circuit boards. In this context, the prospects for the repair of circuit boards are also good, and, after all, the number of circuit boards is increasing, so is the need for maintenance。
Whether or not the circuit boards have been damaged, this can be seen mainly in the following terms:
1. See if the circuit board has been broken, leading to a distortion of the plate corner, or if the chip on the plate has been distorted or broken。
2. Observe the chip plugin and see if it has been forced to break because of lack of tools。
3. Observe the chip on the circuit board, if it is with a plug, first to see if the chip is wrong, which is primarily to prevent the operator from plugging the chip in the wrong position or direction while repairing the circuit board itself. If errors are not corrected in a timely manner, there is a risk that the chip may be burned when the circuit board is powered, causing unnecessary loss。
4 if the circuit board contains a short-link terminal, see if the short-link terminal is wrong。
The maintenance of circuit boards requires solid theoretical merit, careful work and careful observation by the maintenance staff, sometimes at this point the cause of the problem can be judged。
Circuit board maintenance observation method:
I. To observe whether any of the pieces on the circuit board were burned. For example, there are cases of blackening and defuncting of electrical resistors, capacitors, diodes. Under normal circumstances, even if the resistance is burned, its resistance value will not change, its performance will not change and will not affect normal use, which will require the use of a universal meter. But if the capacitor, the diode, were burned, their performance would change and they would not be able to function as intended on the circuit, which would affect the proper functioning of the circuit, at which point new components would have to be replaced。
Observation of integrated circuits on circuit boards, such as 74 series, cpu, co-processor, ad, etc., with or without drum packs, cracks, paste, blackouts. If this occurs, it is generally certain that the chip has been burned and must be replaced。
Observe whether the line on the circuit board is skinned or burned off. There's nothing out of the weld。
Observation of insurance on circuit boards (including tubes and heat-sensitive electrical resistance) to see if fuses have been melted. Sometimes, because the fuse is too thin to see, it can be judged by means of a tool-life watch。
The circuit board maintenance steps should be operated on the basis of the following processes, the main practical tool being the master table。
1. Short-circuit testing of power sources and locations to see why。
2. Test whether the diode is normal。
3. Check if there are short circuits or even circuit breaks。
4. Inspection of the relevant integrated circuits on circuit boards and related device indicators such as resistance。
The knowledge required to maintain circuit boards:
I. Features and characteristics of metaware:
The circuit boards are ultimately composed of various electrons, and the failure of the circuit boards is usually caused by damage to them. So we need to master circuit board maintenance, first of all to understand the functions, functions and characteristics of the various electrons that make up circuit boards。
Ii. Circuit analysis:
The circuit boards are a circuit system consisting of various electromechanical devices, and, when they are maintained, they are able to determine more quickly where the faults may be and increase the efficiency of their maintenance。
Iii. Tools and instruments:
In the course of repairing circuit boards, it is necessary to use a variety of tools, such as screwdrivers, hot wind, universal watches, oscillators, digital bridges, bga welders, etc., which can only be truly maintained if the methods used are properly understood。
Iv. Maintenance experience:
In the course of repairing circuit boards, we can build up a lot of maintenance experience that will also help us to improve the efficiency of circuit board maintenance。
In keeping with the principle of “customer first, good faith first”, guangzhou automatic equipment ltd. Has always followed the corporate purpose of “based on selfless love, with due diligence at its core and good faith at its service”。
Welcome to guangzhou trust automatic equipment ltd.'s website, which is located in guangzhou city, a country with a long history of traffic, economic development, geographical location and foreign trade. The address is ms. Yoon。
The telephone number is 13249782440, which mainly operates maintenance of industrial control automation equipment, maintenance of circuit boards, maintenance of machines, maintenance of touch screens, maintenance of server drives, maintenance of frequency transformers, maintenance of power modules, maintenance of instrument meters, maintenance of controllers and maintenance of sensors。
The funds registered by the unit are under rmb 1 million。
