一、电源部分：电源由变压、整流、滤波、稳压等部分组成，它给整机提供不随电网电压变化的稳定电压，多数电源部分的工作电流较大，由于大电流至使一些元件在正常工作时就要发热，如整流桥、稳压块等，当负载过重（即电流过大）、电网电压过高和温度过高（如散热不良）时，都? First, the power supply part: The power supply is composed of transformer, rectification, filtering, voltage regulation, etc. It provides the whole machine with a stable voltage that does not change with the grid voltage. The operating current of most power supply parts is large, due to the large current to make some components in the When it is working normally, it will generate heat, such as rectifier bridge, voltage regulator block, etc. When the load is too heavy (ie, the current is too large), the grid voltage is too high, and the temperature is too high (such as poor heat dissipation), all?