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因开关电源故障而引发彩电自动关机的原因主要有下列两种:(1)由于开关电源的稳压电路或反馈网络的故障引起开关振荡管工作状态发生变化,使开关管导通/截止时间比例下降,开关振荡电路输出的能量减少,使开关电源带负载能力下降,从而导致开关电源输出电压下降甚至为零值,引发自动关机。在这一类
Because of switching power supply failure caused by the color TV automatically shut down mainly due to the following two: (1) due to the switching power supply regulator circuit or feedback network caused by switching oscillation tube work status changes, the switch on / off ratio Drop, switch the oscillation circuit output energy decreases, the switching power supply with a load capacity decline, resulting in the switching power supply output voltage drop or even zero, triggering an automatic shutdown. In this category