电路故障分析,就是根据电路中出现的各种反常现象,如电灯不亮,电流表、电压表无读数,电压表的读数接近电源电压,测电灯亮与不亮等,分析出现这些反常现象的各种可能的原因(开路、短路),然后再根据题中所给的其他现象或测试结果进行综合分析,确定故障. Circuit failure analysis is based on various anomalies that occur in the circuit. For example, the lamp is off, the ammeter and voltmeter have no reading, the voltmeter reading is close to the power supply voltage, and the measurement lamp is on and off. Analysis of these anomalies occurs. The possible causes (open circuit, short circuit), and then comprehensive analysis based on other phenomena or test results given in the question to determine the failure.