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故障现象:一台松下TC—29GF10R彩电,工作二年,突然出现开机“三无”,待机指示灯亮。分析与检修:松下TC—29GF10R彩电采用M17机芯,电路先进,保护电路齐全,对于+B电压过压、过流等都能起到良好的保护作用。对于“三无”故障应首先断明是电源的问题,还是负载的问题,或是保护电路本身故障。开盖后,开机瞬间测+B电压,有约+20V且跳变。关机后再开机瞬间
Symptom: A Panasonic TC-29GF10R color TV, two years of work, suddenly appeared boot “three noes”, the standby indicator light. Analysis and Maintenance: Panasonic TC-29GF10R color TV using M17 movement, advanced circuits, complete protection circuit, for the + B voltage over-voltage, over-current, etc. can play a good protective effect. For the “three no” fault should first identify the power supply problem, or the load problem, or the protection circuit itself fault. Open the lid, boot instantaneous measured + B voltage, about +20 V and jump. Power off and then boot instantly