当黑白电视机出现有伴音而无光栅时,主要原因是显像管、显像管电路及其亮度控制系统和行扫描系统出了故障,下面介绍快速检查行输出电路的方法,供初学者参考。一、先测行输出管的基极电压,如果基极有0.1～ When the black-and-white TV with a sound without grating, the main reason is the picture tube, picture tube circuit and its brightness control system and the line scan system has failed, the following describes the fast check the line output circuit for beginners. First, the first test line output tube base voltage, if the base has 0.1 ~