彩电收看中自动关机故障(突然无光、无声)比较复杂。根据修理实践来看大体可分为两类:一类是自动关机后,不能再自动开启,必须关闭电源后。才能重新人为开机。另一类是自动关机后,又能自动开启(有的经振动)。对于第一类故障,一般是由于机器存在过压、过流、X射线过量引起保护电路动作所致,或有关元件性能变劣造成。而第二类故障多数是因为电路中存在接触不良(如电源电路、行电路有关大功率的三极管、集成块、电阻等引脚出现虚焊、电路板铜箔出现裂纹,接 TV watching automatic shutdown failure (suddenly no light, silent) is more complicated. According to the repair practice can be roughly divided into two categories: one is automatically shut down, you can no longer automatically open, you must turn off the power. In order to re-artificial boot. The other is automatically shut down, but also automatically open (some by vibration). For the first type of fault, usually due to the existence of the machine over-voltage, over-current, X-ray caused by excessive protection circuit action, or the deterioration of the components caused. The majority of the second type of fault is due to poor contact in the circuit (such as power circuits, high-power circuit on the circuit triode, manifold, resistors and other pins appear Weld, the circuit board copper cracks, then