FM9925A-E ABB 控制器模块

在电路板中，不管是什么类型的电路板基本上都是由: 电源给应电路、输入接口电路、微处理器控制电路、输出接口电路、显示电路、保护电路和通信电路等7大部分电路组成。只要咱们掌握了这七大类的电路组成结构和控制原理，知道每类电路的结构组成特点和关键部件，能在电路板中判断出每部分电路是属于那一类电路熟悉每一类电路的故障规律和特点、就可以针对各种类型的电路板进行维修了。
电源供应电路: 电源供应电路部分电路是向整个电路板中各个单元电路提供能量的一部分电路，它工作在高电压、大电流的环境下是最容易出故障的一部分电路
电源供应电路的功用是: 将220VAC或380VAC交流电转换成电路板所需的各种不同等级、输出电压恒定的+5V 、12V、15V、18V、24V等级别的直流电

FM9925A-E

In the circuit board, no matter what type of circuit board is basically composed of: power supply circuit, input interface circuit, microprocessor control circuit, output interface circuit, display circuit, protection circuit and communication circuit, etc. As long as we master the circuit composition and control principle of these seven categories, know the structural composition characteristics and key components of each type of circuit, can determine in the circuit board that each part of the circuit belongs to that type of circuit familiar with the fault law and characteristics of each type of circuit, you can repair for various types of circuit boards.
Power supply circuit: The power supply circuit is a part of the circuit that provides energy to each unit circuit in the entire circuit board, and it works in the environment of high voltage and high current
The function of the power supply circuit is to convert 220VAC or 380VAC AC into a variety of different grades required by the circuit board, and the output voltage is constant +5V, 12V, 15V, 18V, 24V grade direct current

FM9925A-E