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松下F95型录像机电源电路图,如图1所示。松下(乐声)HD—100、SD—50型录像机电源也都采用这种电路,仅个别处略有差别,进行分析和维修时可以此为参考。由于这类电源采用了高集成度开关电源专用厚膜电路及光电耦合器、精密可调稳压器等,使得电路简洁、稳定特性及各项指标都较理想。本文在分析其工作原理的基础上简单介绍其检修方法。
Panasonic F95-type VCR power circuit diagram, shown in Figure 1. Panasonic (Music) HD-100, SD-50-type VCR power supply also uses this circuit, only slightly different elsewhere, for analysis and maintenance can be as a reference. Because of this type of power using a high degree of integration of switching power supply thick film circuits and optocouplers, precision adjustable voltage regulator, making the circuit concise, stable characteristics and various indicators are more ideal. Based on the analysis of its working principle, this article briefly introduces its maintenance methods.