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有些电视机使用一段时间或经过维修后,光栅上出现1至数道垂直黑白带或黑白线,其状如图1、2。这种干扰黑带或黑线,有的呈渐进性加重;有的发展到一定程度便不再发展;有的时有时无,无规律可寻。某些质量低劣的电视机,出厂时就有上述症状,只是轻些,不易为一般人察觉。上述症状,称为电视机行频辐射故障。电视机行频辐射故障的典型症状现象,较为直观,在光栅上出现的干扰黑带或黑线,有的是1～12频道均有,但其轻重程度在每个频道上却有所不同;有的仅在几个或某个频道上出现,其它频道则正常。图1垂直黑带干扰症状,俗称“肋骨条”状干扰,在黑白电视机上较多见,彩色电视机上较少见;图2垂直黑线于扰在彩色电视机上较多见,尤其是在3～5频道的L波段发生率较高,而在黑白机上少见。
Some TV use for a period of time or after repair, appear on the grating 1 to several vertical black and white band or black and white lines, its shape as shown in Figure 1,2. Such interference with the black belt or black line, and some progressively aggravating; some development to a certain extent will no longer develop; sometimes sometimes no law can be found. Some poor quality TV, the factory had the above symptoms, only slightly, not easy for the general public to detect. The above symptoms, known as the TV radio frequency radiation failure. The typical symptom of the television line frequency radiation failure is more intuitive, there are interference black bands or black lines on the grating, and some of them have channels 1 to 12, but their light and heavy degree are different on each channel; some Appear only in a few or a certain channels, other channels are normal. Figure 1 Vertical black belt interference symptoms, commonly known as “ribs” -like interference, more common in black and white TV sets, color TV sets are rare; Figure 2 vertical black line in the disturbance of color television sets are more common, especially In the 3 to 5 channel L band higher incidence, but rare in black and white machine.