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一、如何检修无电路图的通信设备 在日常维护和检修过程中,有时会遇到有一些没有电路图的设备或仪表需要检修。这对于查找故障带来一定的困难。下面介绍一些有关经验: 1.先根据设备的故障现象,初步判断出故障可能所在的单元电路。在印刷电路板上仔细找到与之对应的部位并准备测绘出参考电路图。这一步骤,对较易判断故障部位的情况可能显得麻烦些;但对那些较难判断故障部位的时候却显得很有必要了。 2.在绘图过程中,一般可以集成电路块、大小型变压器、晶体三极管或某些关键插接件等为主线开始绘制。需要指出:并非要把所有与故障部位有关的电路统统画出来,而是根据查找
First, how to overhaul communication equipment without circuit diagram In the routine maintenance and repair process, sometimes encountered some without the circuit diagram of the equipment or instrument needs overhaul. This brings some difficulties in finding faults. The following describes some of the relevant experience: 1. According to the phenomenon of equipment failure, the initial judge where the fault may be the unit circuit. Carefully find the corresponding parts on the printed circuit board and prepare to plot the reference circuit. This step, may be more troublesome to determine the fault location; but it is necessary for those who are more difficult to judge the fault location. 2 in the drawing process, the general can integrated circuit blocks, small and medium sized transformers, transistors or some of the key plug connectors as the main line began to draw. It needs to be pointed out: not all the circuits related to the fault location should be drawn up, but based on the search