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电容是各种电子线路中必不可少的元件。一旦漏电,其容抗就要降低,影响电路的工作特性。在彩电中小电容(0.5μF以下)轻度漏电后,因其形不显眼、貌不惊人,在检修中容易被忽视;特别是在没有示波器检测电路波形的情况下,仅凭万用表或电容表又较难准确地判断出故障元件;往往很难使检修工作事倍功半,甚至陷入困境。下面几个例子的检修过程,对检修此类故障提供了一些可供借鉴的经验。
Capacitance is an essential element in a variety of electronic circuits. Once the leakage, the capacitance will be reduced, affecting the operating characteristics of the circuit. In the small and medium-sized color TV (0.5μF or less) after a slight leakage, because of its shape is inconspicuous, the appearance is not alarming, easily overlooked in the overhaul; especially in the absence of oscilloscope detection circuit waveform, only by multimeter or capacitance meter Difficult to accurately determine the failure of components; often difficult to make maintenance work less effective, or even in trouble. The following several examples of the maintenance process, maintenance of such failures provides some lessons for reference.