【摘要】 针对PVW 2 0 0 0系列录像机中开机静音电路的特点 ,对其基本原理进行了详细的分析 ,给出了电源检测元件M5 195 7BL的内部电路、各主要元件的参数以及不同状态下电路中各关键点的参考电压 ,指出了系统内不同单元开机静音电路的差异及电路故障的排除方法。更多还原

【Abstract】 Aiming at the features of the mute circuit of PVW2000 series video-recorder with power on, illustrates their general principles, offers the inner circuit to the power on pulse generator M51957BL, the parameters for the main parts and the reference voltage for every key points in different conditions. Also points out the mute circuit differences between different parts in the system and provides the method of solving the problems.更多还原