目前,使用北京广播器材厂生产的彩色电视发射机数量较多,该机电控部份采用HTL集成电路、晶体管、可控硅等组成的逻辑控制,使用方便、安全、可靠性也较高。但是,由于元器件损坏,特别是HTL电路的早期失效,也会产生逻辑控制失控故障。故障现象:①本控不开机,灯丝电压就自行接通。②本控不开机,风机和灯丝电压控制自行合上。③本控开机,合上高压开关,但高压不经五分钟 At present, the use of Beijing Broadcasting Equipment Factory production of color TV transmitters a large number of aircraft control part of the HTL integrated circuits, transistors, SCR and other components of the logic control, easy to use, safe, high reliability. However, due to component damage, especially the early failure of the HTL circuit, a logic-controlled runaway fault can also occur. Symptoms: ① The control does not boot, the filament voltage on their own. ② This control does not turn on the fan and the filament voltage control on their own. ③ The control boot, close the high-voltage switch, but high pressure without five minutes