Common faults and treatment methods of industrial LCD screen
Date:2019-07-09
Some problems often appear in the use of industrial LCD screen. This paper introduces the abnormal situation of industrial LCD screen and the solutions: generally, the working environment of industrial LCD screen is relatively bad, so the possibility of problems is relatively large, such as military industry, transportation, electric power, railway, aviation, etc, So once the industrial LCD screen problems, how to solve it?
There are several kinds of failures in industrial LCD screen: white screen, flower screen, black screen, dark screen, yellowing, white spot, bright line, bright band, dark line, dark band, outer film scratch, etc.
Among the above failures of industrial LCD screen, it is relatively easy to maintain the screen, such as mute, yellowing, white spot and scratch of outer film.
When the LCD screen is dark, the LCD lamp is actually aging. Just replace the aging lamp directly.
If the problem of yellowing and white spot of industrial LCD is backlight, it can be solved by replacing the corresponding backlight or light guide plate.
If the outer film of industrial LCD is scratched, it means that the polarizer on the surface of LCD glass is damaged, and it is also replaced manually.
Of course, the above problems can be solved by replacing the industrial LCD screen. There are also many precautions in the implementation. The lamp should be installed in place to avoid light leakage; When dealing with backlight, you should pay attention to dust prevention, otherwise you will see dust spots when the screen is lit; Replace the polarizing film to avoid tearing the film when the screen pressure, dust is taboo, once there is dust into the film, it will produce bubbles, it is basically scrapped a film, must come again.
There are also industrial LCD screen appears white screen, flower screen, black screen are basically due to circuit failure. First of all, we should eliminate the fracture of the screen wire, and then check whether 3.3V has been added to the screen, and then check whether there are high voltage and negative pressure outputs in the rear stage, and whether there are outputs in the main control chip. A considerable part of the splash screen is due to the line driver does not work, with a few lines can solve the problem. A small part of the splash screen is due to the damage of the first driver module of the row or column.
All industrial LCD screens are guaranteed for one year after-sales service. If the industrial LCD screen you use has the above faults and is still in the warranty period, you can contact the supplier who purchased the industrial LCD screen and ask them to return to the factory for repair. If it is beyond the warranty period, you can also repair it by paying.
