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笔者曾经在有关修理杂志上看过一些提示修理人员对新元件的质量不能忽视,必须进行检测,然后才能装入电路中,但大多都是介绍有关二极管、三极管的参数检测问题。而本人发现的问题不属此类。在这儿浅谈一下,以供同行以及初学者们参考。本人在修理一台春风牌35 cm(14英寸)黑白机时,发现了一个新的元件质量问题。该病机属场频不稳,通过检测。发现场频电位器阻值严重发生变化,而其他元件均完好。通过分析确认就是场频电位器阻值
The author has seen some tips in the relevant repair magazines repair personnel on the quality of the new components can not be ignored, we must test, and then can be loaded into the circuit, but most of them are introduced on the diode, transistor parameters detection problems. I found the problem is not the case. Talking about here, for colleagues and beginners for reference. When I repaired a Chunghwa brand 35 cm (14 inch) black and white machine, I found a new component quality problem. The disease is a field frequency instability, through testing. Found that the resistance of the field frequency potentiometer serious changes, while the other components are intact. Through the analysis confirmed that the field frequency potentiometer resistance