论文部分内容阅读
彩电遥控部分发生故障通常是按如下两种方法进行检修:一是用同类正常遥控器作遥控实验,如控制正常则说明问题出在遥控信号发射部分,如仍不能遥控则属于CPU及其外围电路故障;二是按面板矩阵开关,如果控制和调整电路功能正常,则是遥控接收头有故障,否则就是CPU和矩阵电路有问题。然而却事与愿违,故障即不在遥控器,也不在CPU及外围电路,而在主开关电源电路。以下是对这类故障的检修过程和剖析。
TV remote control part of the failure is usually based on the following two methods of inspection and maintenance: First, with similar normal remote control for remote control experiments, such as control is normal, indicating that the problem lies in the remote control signal transmission part, if still can not remote control belongs to the CPU and its peripheral circuits Fault; second is by the panel matrix switch, if the control and adjustment of the circuit function is normal, the remote control receiver is faulty, otherwise there is a problem with the CPU and matrix circuit. However, contrary to expectations, failure is not in the remote control, nor in the CPU and peripheral circuits, while in the main switch power circuit. The following is the troubleshooting process and analysis of such failures.