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家电的电路比较复杂,特别是彩电、录像机、影碟机等,对复杂电路分析和检修往往不知从何处下手。笔者探索将电工学中的节点分析法用于家电的维修中,通过对节点上电压、信号的测量、分析,能较快的判断故障范围,提高检修速度。一、节点的类型和故障规律笔者探索节点分析法在家电检修中的运用,主要是对信号流程电路、各种控制电压传输电路中的节点进行故障分析,帮助确定故障范围;既与电工学中的节点电压法有关联,也有很多不同。下面的名称和说明都是笔者为了阐述和运用该方法所加的,图1、2中所标出的箭头方向是信号的流程方向和控制电压的走向,不是电流方向。
Home appliances circuit is more complicated, especially color TV, video recorders, DVD players, etc., often do not know where to start the complex circuit analysis and maintenance. The author explores the use of node analysis in electrotechnics for the maintenance of home appliances. By measuring and analyzing the voltage and signal at nodes, the author can quickly determine the fault range and improve the speed of overhauling. First, the node types and fault law I explore the node analysis method used in the appliance repair, mainly on the signal flow circuit, a variety of control voltage transmission node of the node failure analysis to help determine the scope of failure; both with electrotechnical There are many differences between the node voltage method. The following names and descriptions are the author in order to elaborate and apply the method, the direction of the arrow marked in Figure 1,2 is the signal flow direction and the control voltage direction, not the current direction.