论文部分内容阅读
一台摩托罗拉原装手机充电器,故障是充电器电源指示灯不亮,电池充不上电。打开充电器只见元器件排列很紧密,元器件采用两面安装。而且大部分电阻、电容为表面安装。电路采用高效开关电源,初、次极采用光电耦合器件隔离开,电路板用开槽方法来防止强电串到弱电部位发生触电事故。从外观看没有发现元器件烧坏等现象,用三用表测交流输入220V、整流输出及开关调整管漏极D
A Motorola original cell phone charger, the fault is the charger power light does not shine, the battery does not charge. Open the charger saw a very close arrangement of components, components used on both sides of the installation. And most of the resistance, capacitance for the surface mount. High-efficiency switching power supply circuit, the first and second most optocoupler isolated device, the circuit board slotted method to prevent the strong string to the weak part of the electric shock accident. No appearance of components found from the appearance of the phenomenon of burn out, with three-meter measuring AC input 220V, rectifier output and the drain switch to adjust the drain D