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北京牌8320型遥控彩电,机芯为三洋83PG(即83P机芯+东芝CTS—130A遥控系统),该机的开关电源与83P机芯有所不同,稳压部分由一个光耦合器来完成。光耦合器是由一只发光二极管和一只光敏三极管组成。控制发光二极管发光强弱的电压是通过Q_(353)、R_(352)、VR_(351)、R_(353)、R_(354)、D_(361)、R_(355)、R_(356)等元件对+B_1直接取样而得。这里的光敏三极管相当于一个受发光二极管发光强弱控制的“可变电阻”,这个“可变电
Beijing 8320 remote color TV, the movement of the Sanyo 83PG (that is, 83P movement + Toshiba CTS-130A remote control system), the machine’s switching power supply and 83P movement is different from the regulator part of an optocoupler to complete. Optocoupler is composed of a light-emitting diode and a phototransistor. The voltage for controlling the light emission intensity of the light emitting diode is determined by Q 353, R 352, VR 351, R 353, R 354, D 361, R 355, R 356, etc. The component is directly sampled from + B_1. The phototransistor here is equivalent to a “variable resistor” controlled by the light-emitting diode light-emitting intensity. This "variable power