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在电视机维修中,电阻故障占有相当的比例。从维修实践中可发现,电阻器的损坏一般分为二种情况: 一、由外部原因造成。由于某种原因(多数是由于其他元器件的击穿损坏),致使电路中的电压、电流异常上升,造成在该电阻上产生的耗散功率大大超过了其额定功率而烧毁损坏。
In the TV repair, resistance failure occupies a considerable proportion. From the maintenance practice can be found, the damage is generally divided into two resistors: First, caused by external causes. For some reason, mostly due to breakdown of other components, the voltage and current in the circuit are abnormally increased, causing the dissipated power on the resistor to exceed its rated power and burn out.