How to use a multimeter to detect damaged electronics or appliances?
This question is very complex, or rather it confuses me. When it comes to electronic product maintenance, home appliance repair, or computer brain maintenance, everyone has their own methods and cannot generalize. In general, 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, it can determine the location of faults. For example, by measuring the voltage of a certain section of the circuit to determine whether it is working properly; Determine if a component is functioning properly by measuring its resistance; By measuring the capacitance of a component, determine whether it is open, short, or deteriorated.... wait. So a multimeter is just a tool. After DIY fans buy it back, they should still bubble up various forums or participate in extracurricular classes to strengthen their own literacy and improve their tool usage ability. Finally, to give an analogy, a multimeter is like a precious sword, and its power lies in its owner. With a certain percentage of martial arts (electronic knowledge), it can exert a certain percentage of its effectiveness.
I am a novice and I want to learn electronic maintenance. What kind of multimeter do I want to purchase?
In general, friends who are just starting out can buy a popular multimeter (a 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 function, transistor, and capacitor measurement, are also commonly used. Therefore, it is recommended to consider purchasing an instrument with this function. Of course, there are some skilled maintenance personnel who may have their own unique maintenance methods, which is another matter. The most cost-effective multimeter that meets these functions is the DT9205A or M890D, which are standard models. Some manufacturers call them DT9205, DT9205N, DT9205L, DT9205B, and DT9205M, but their functions are similar. It can be said that they change the soup without changing the medicine. Buyers only need to identify the functions and do not need to pay attention to the differences in models.
