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徒弟:何谓“软”故障?有何特征?如何检修? 师傅:所谓的“软”故障是指相对于“硬”故障而言的,“硬”故障往往指的是因某些元件彻底损坏而引起的“死”故障。故障特征是每次开机后出现的故障现象不随时间或地点而变,几乎固定不变。如开机呈“三无”,水平或垂直一条亮线,黑白图像正常、但无彩色,自动搜索不停台、不存台,有图无声,有声无图等带有共性的、有章可循的规律性故障。一般情况下,更换已损件后故障即能排除。“软”故障往往指的是因某些元件性能不良,或元件虚焊,或接插件、开关、电位器接触不良等诸多原因而引起的时好时坏,时有时无故障。故障特征是每次开机后故障现象并不固定不变,而随着时间的延移而无规律地发生变化,让人捉摸不定、又难于捕捉。如收看中无规律地自动关机,不定期跑台、彩色时有时无,图声时有时无、遥控功能时好时坏等故障。
Apprentice: What is a “soft” fault? What characteristics? How to repair? Master: The so-called “soft” fault is relative to the “hard” fault, the “hard” fault often refers to the complete destruction of certain components and Caused by “dead” failure. Fault feature is that after each boot failure phenomenon does not change with time or place, almost fixed. Such as the boot was “three no”, a horizontal or vertical bright line, black and white image is normal, but no color, automatic search does not stop the stage, no stage, a picture without sound, no picture with sound and other common, Regularity fault. Under normal circumstances, replacement of damaged parts that can be ruled out. Often refers to the “soft” fault due to poor performance of some components, or components Weld, or connectors, switches, potentiometers and other causes of poor contact bad times, sometimes trouble-free. Fault feature is that after each boot failure phenomenon is not fixed, but with the passage of time and irregular changes, people unpredictable and difficult to capture. Such as watching the law automatically shut down irregularly, irregularly run the stage, the color sometimes no, when sometimes without sounding, remote control function, good and bad time and other failures.