
1. Appearance 1.1. Surface 1.1.1. Check whether there is any stain on the surface of the power adapter. 1.1.2. Whether

The nominal voltage of the power adapter usually refers to the open-circuit output voltage, that is, the voltage value th

The main function of the optocoupler in the circuit is to realize photoelectric conversion, realize isolation, and avoid

In fact, no-load power consumption of a single charger is not large. The People's Republic of China Communication Ind