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有一部分彩电的遥控开/关机(ON/OFF)是通过CPU发出开/关信号指令去控制开关电源中开关管的停振或起振来实现关机和开机的,如果CPU的主电源控制端(POWER脚)误动作或其接口电路出了问题(如控制三极管出现击穿故障),开/关机指令不能正常传送,造成开关电源停振,机器出现“三无”,这时开关电
Some of the color TV remote ON / OFF (ON / OFF) is issued by the CPU on / off signal instruction to control the switching power supply switch in the shutdown or start-up to achieve shutdown and boot, if the CPU’s main power console POWER pin) or its interface circuit malfunction (such as the breakdown of the control transistor breakdown), on / off command can not be transmitted normally, resulting in switching power supply stop vibration, the machine appears “three noes”, then the switch power