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用示波器测试彩电故障部位的波形,不仅要看它是否有波形,还必须详细地观察其波形的振幅、持续时间、相位关系和形状等。为了正确地识别故障波形,找出故障波形与故障之间的联系,就得熟悉彩电各种正常信号波形的特点。彩电的电原理图中标出了一些重要测试点的电压波形,但还有不少点的波形并没有给出,为了检修故障方便,也有必要知道这些点在正常情况下的波形。对主要检测点的波形不但要会测,而笪
Use oscilloscope to test the waveform of fault location of color TV, not only to see if it has waveform, but also to observe the amplitude, duration, phase relationship and shape of its waveform in detail. In order to correctly identify the fault waveform, find the connection between the fault waveform and fault, you have to be familiar with the characteristics of various normal color TV signal waveform. TV schematic shows some of the important test voltage waveform, but there are many points of the waveform is not given, in order to facilitate troubleshooting, it is also necessary to know the waveform of these points under normal circumstances. The main test point of the waveform will not only be measured, and 笪