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彩色电视机采用串联型或并联型开关电源,而并联型开关电源在彩色电视机中应用较多,它分为调频式和调宽式两种形式。其中调频式开关电源是利用反馈来控制开关脉冲的频率,使输出电压达到稳定。调频式开关电源的特点是工作频率与行频脉冲无关,即开关电源中开关管的工作状态不受行频脉冲的控制。属于这类的机型有北京8303、凯歌4C3702、东芝C1413Z、西湖47CD3、长城JTC—371、华白C47J—1、黄河
Color TV with series or parallel switching power supply, and the parallel switching power supply in the color TV applications more, it is divided into FM and FM widened two forms. One of the FM switching power supply is the use of feedback to control the switching pulse frequency, the output voltage to achieve stability. FM switching power supply is characterized by frequency and line frequency pulse has nothing to do, that is, the working status of the switching power supply switch frequency pulse control. Belong to this type of aircraft are Beijing 8303, Kay song 4C3702, Toshiba C1413Z, West Lake 47CD3, the Great Wall JTC-371, White C47J-1, the Yellow River