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故障现象:万用表各档量程均工作,但所测的值均不准确。如交流电压档,测市电电压值只有175V,而实际值220V左右。其它档也有类似情况。
Symptoms: All ranges of the multimeter work, but the measured values are inaccurate. Such as AC voltage file, measuring the market voltage is only 175V, and the actual value of 220V or so. There are similar situations in other files.