What kind of oscilloscope is used to repair household appliances?
Which parts of electrical appliances should be repaired with an oscilloscope?
An oscilloscope can accurately measure the working status of a circuit quantitatively and qualitatively, and it does have the effect of getting twice the result with half the effort. The appropriate one to use mainly depends on what machines or circuits you are repairing. For general home appliances, a bandwidth of 20M is sufficient, but It will be difficult to repair high-frequency circuits, such as the high and medium amplifier circuits of mobile phones. In this era, high-frequency instruments for spectrum testing are very convenient, and ordinary oscilloscopes are very inconvenient when used to measure low-frequency circuits and digital circuits. Even if the test cannot be performed, a digital oscilloscope is very convenient for children at this time, and a sampling oscilloscope is better. in addition. Ideal oscilloscopes are relatively expensive and generally unaffordable. However, ordinary oscilloscopes usually have more opportunities to be idle due to the things that multimeters can do. They are only used later when they encounter problems. If modern equipment is For board-level maintenance, it is better to have an oscilloscope, or simply get a spectrum analyzer, which can measure everything. The domestically produced Beijing Electronic Display Instrument Factory products are very good, of good quality, and durable. For imported products, you can choose Japanese ones from Kikusui. For actual maintenance, considering the portability, I bought the LCD display (the disadvantage is that it is easy to break due to poor overload performance). Since I don't know your scope of use and maintenance scope, I can only say this much. If you have any questions, you can continue to ask or discuss.
Home appliance repair requires an oscilloscope
I am a maintenance worker with more than ten years of maintenance experience. I personally think that there is no need for an oscilloscope. It can be said that there are dozens of maintenance departments in the county, but not many of them have this thing. First of all, white appliances in home appliance maintenance Technology (air conditioners, refrigerators, washing machines, small appliances) cannot use this at all. Only black electricity technology can be used to repair TVs. Its use in TV repairs is only limited to the maintenance of the signal channel part, and the scope of TV repair faults The proportions: switching power supply 20%, field part 30%, computer remote control part 20%, picture tube and its ancillary circuits 10%, signal channel part 10%, other faults 10%, it can be seen that the use of the oscilloscope is still relatively small Yes, it is true that this equipment has advantages that cannot be compared with other equipment for the maintenance of the signal channel part. However, the focus of the development of the home appliance maintenance industry is no longer on the maintenance of a certain component, but on the need for the rapid development of new home appliance products as a whole. Have a full understanding of the structure, function, and principles. For time-consuming and troublesome repairs, cost and man-hours must be considered comprehensively. Only in this way can we achieve a double harvest of technology and benefits to ensure that the home appliance repair industry is always full of vitality.
