How can a multimeter detect damage to electronic products or household appliances?
This question is very complex, or in other words, it overwhelms me. For electronic product maintenance, home appliance repair, or computer brain maintenance, everyone has their own methods and cannot be generalized. Overall, a multimeter is just a tool with many functions (that is, it can measure many parameters). By proficiently measuring the parameters of various circuits or components, and combining them, the fault can be determined. For example, by measuring the voltage of a certain section of the circuit to determine whether it is working properly; Determine whether a component is functioning properly by measuring its resistance; Determine whether a component is open, short circuited, or deteriorated by measuring its capacitance.... Wait a minute. So a multimeter is just a tool. After DIY fans buy it, they should also participate in various forums or extracurricular classes to strengthen their own literacy and improve their ability to use the tool. Finally, for example, a multimeter is like a sword, and its power lies in its owner. With a few tenths of martial arts skills (electronic knowledge), it can achieve several tenths of its effectiveness.
What kind of multimeter should I purchase to learn electronic maintenance?
In general, friends who are just starting out should buy a popular multimeter (named after its ability to measure voltage, current, and resistance simultaneously). The most commonly used function is resistance, followed by DC voltage. The additional functions of a multimeter, such as diode, buzzer, transistor, and capacitor measurement, are also commonly used. Therefore, it is recommended to consider purchasing an instrument with this function. Of course, some skilled maintenance personnel may have their unique maintenance methods, which is another matter. The most cost-effective multimeter that meets these functions is the DT9205A or M890D, which is a standard model. Some manufacturers call it DT9205, DT9205N, DT9205L, DT9205B, DT9205M, but in fact, the functions are similar. It can be said that changing the soup does not change the medicine. Buyers only need to recognize the functions and do not need to pay attention to the differences in models.
