论文部分内容阅读
徒弟:师傅,我从一些电子报刊杂志上发现,有关彩色电视机中频检波谐振回路失谐的检修实例很多,请问,在彩电故障中这类故障出现率是否很高? 师傅:从多年的维修实践中总结发现,在彩电故障中,因中频失谐引起的故障率很高。使用日久的电视机中这类故障数量比较多。由于此故障表现多种多样,因此掌握此故障的维修技术十分重要。徒弟:这种故障是由什么元件损坏引起的? 师傅:造成此故障的主要原因是中频谐振线圈底座内的管状谐振电容变值或漏电。正常情况下,该电容为银白色。随着使用时间(一般在3～4年)的延长以及煤气等因素的影响,该电容逐渐老化变质,其表面颜色
Apprentice: Master, I found from some electronic newspapers and magazines, there are many examples of detuning problems in the color TV medium-frequency detector resonant circuit. Excuse me, is there a high incidence of such failures in the color TV malfunction? Master: From years of maintenance practice The summary found that in the color TV failure, because of the high frequency of detuning caused by the failure rate. The number of such failures in the long-term use of television sets is high. Due to the variety of malfunctions, maintenance techniques to handle this problem are very important. Apprentice: What kind of failure is caused by this component? Master: The main reason for this failure is the change of tubular resonant capacitance or leakage in the middle frequency resonant coil base. Under normal circumstances, the capacitor is silver white. With the use of time (usually 3 to 4 years) and the impact of gas and other factors, the gradual deterioration of the capacitor, the surface color