My friends in the 80s have a lot of life experience passed on by word of mouth. Among them, "television failure can be good when shooting" can be described as a hundred-use Braun. Whether it is a black TV screen, a blurred screen, no sound, bad signal, etc., it seems to be slapped. Can solve all the problems of the TV.
But in fact, this kind of experience has gone along with the end of the CRT TV industry. From the simplest LCD to quantum dots, OLED, laser TV, etc., tapping on the TV will only cause secondary damage to the TV. What is the principle? Let's talk about it in detail.
Different structure
Old-fashioned CRT TV adopts picture tube imaging technology, the body of the TV is very thick, its electronic components and welding technology are relatively traditional, and most of them are manually welded and used for a long time During the process, false welding and poor contact may occur. At this time, if you take a beat and shake, maybe the electrode contact will be better, and normal work will be restored temporarily.
At present, whether it is LCD or OLED TV, its backplane adopts advanced production technology, and the robot is refined and made, and the backplane is no longer composed of complex copper wires, picture tubes, etc. From the structural point of view On the contrary, it is simpler, but the product material is slightly delicate and will not break easily, but if it breaks, it can only get worse by tapping.
CRT’s biggest opponents: moisture, aging
The biggest culprit that causes damage to old-fashioned TV sets is actually moisture. The post-80s have an experience. Whether the TV is black, blurred, or without sound, it may be able to get an immediate effect by tapping, but if it is the color cast or redness of the TV, it will take a long time to tap it to alleviate it. In fact, due to the structure of the picture tube , the picture tube will gradually age under long-term use and the erosion of humid gas. In the latter case, when the TV is turned on for a period of time, as the TV heats up and the humid air is gradually dissipated, the color and image of the TV will improve to a certain extent. The main reason has nothing to do with the tapping.
The backplane light-emitting technology used in both LCD and quantum dot TVs relies on the backplane lamp beads to illuminate the front row of LCD panels. In the case of non-physical damage, the long-term use of the largest probability of damage is the backplane electronic components and The aging of the lamp beads leads to dark corners, shadows, etc., and most of the failure causes of the LCD screen are dead pixels and bright spots. In this case, tapping will only cause secondary damage to the aging parts.
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