Common Detection Methods For LED Unit Boards
The important part of the LED electronic display is the LED unit board. If there is a problem with the unit board, it will directly affect the overall quality of the LED display! Therefore, how to distinguish the quality of the LED unit board is the problem that the LED display merchant cares about, and some common methods to detect LED unit boards are compiled below.
One, Material
1. LED unit board material
In order to compete at low prices, some LED unit board manufacturers use cheap flame retardant paper boards or single -sided fiber boards as PCB line boards for LED lights. Because the whole glass fiber PCB board is expensive. At the beginning, the difference is not visible. Generally, in general, it will break due to moisture, ultraviolet destruction, oxidation, etc., causing the entire LED unit board to be scrapped. High -quality LED unit boards must use double -sided all -off glass fiber PCB board. Although the cost is high, the quality is guaranteed.
2. IC device
Observe whether the brand of IC devices use is consistent. What model of IC and how many ICs are used, which is enough to affect the quality of the LED unit board. Some LED display manufacturers, in order to save costs, will deliberately reduce the number of ICs during the production unit board, or mixed with other brands of ICs.
3. Light beads and chips:
The naked eye cannot distinguish the quality of lamp beads. It can only be based on long -term tests, which is the aging test that experts say. The approach of general LED display manufacturers is to power on before the factory, check whether the LED display can operate normally, will not be tested for a long time. Because there are time and labor costs.
Second, welding quality
Check whether there are component leakage stickers, wrong stickers, and whether there are component tube feet and burrs short circuit. Check whether the direct plug -in welding joints are smooth and round, whether the surface of the board is clean and neat, and the welding is not welded without virtual welding. Check the consistency of the flatness of the light and the color of the ink.
Third, power -on test
Power -powered test (refer to the "Performance Test Report" steps):
① The consistency of the lighting point of power test;
② Whether the power -on test is effectively protected by CEM4953;
③ Power -powered test signal transmission capacity.
