一、宏基 ACER-78G 彩显的主电源的原理图(如图1所示)1.交流抗干扰与整流滤波电路交流抗干扰电路的作用是:消除和防止来自电网的各种干扰,同时又防止开关电源产生的高频电磁干扰向电网扩散,以避免污染交流电网。插上电源插头以后,交流输入电压(220V)首先进入互感滤波器 L602、C605、C604、C602、C603是高频滤波电容。L602中流过交流电流时,因为它的磁芯中产生的磁通方向相反,因此电感量较小,而对交流输入回 First, Acer ACER-78G color display of the main power of the schematic (as shown in Figure 1) 1. AC anti-interference and rectifier filter circuit AC anti-jamming circuit role is to eliminate and prevent all kinds of interference from the power grid, at the same time Prevent high-frequency electromagnetic interference generated by switching power supply to the grid proliferation, in order to avoid pollution of the AC grid. Plug in the power plug after the AC input voltage (220V) first into the mutual inductance filter L602, C605, C604, C602, C603 is a high-frequency filter capacitor. L602 in the flow of AC current, because of its core magnetic flux generated in the opposite direction, so the inductance is small, and the AC input back