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二、故障分析弄懂电源工作原理及各方面的电路工作性能是检查故障的必要前提,然后结合故障原因,大致判断故障部位,用仪器、仪表测试确认,修复故障。实例如下: 例1 故障现象:指示灯不亮.无电压输出。分析与检修:从上述现象看,该类故障发生在开关电源的前级。首先检查F001是否完好,如F001熔断,仔细检查ZNR001、D001、C006、IC001是否击穿,F001
Second, failure analysis Understand the working principle of the power supply and all aspects of the circuit performance is the necessary precondition to check the fault, and then combined with the fault reason, roughly determine the fault location, with the instrument, the instrument test to confirm and repair the fault. Examples are as follows: Example 1 Symptom: The indicator is not lit. No voltage output. Analysis and Maintenance: From the above phenomenon, this type of failure occurs in the switching power supply before the stage. First check F001 is intact, such as F001 fuse, carefully check ZNR001, D001, C006, IC001 is breakdown, F001