"As long as everyone gives more love, the world will become a beautiful world." As the song rang, I decided! Do a good thing today, I want to help those LED display business people, I am only willing to give up without asking for a return! How to distinguish the quality of the LED unit board is a concern of the LED display business, because the quality of the unit board directly affects the overall quality and performance of the LED display. Xiaobian will tell you some ways to distinguish LED unit boards.
How to distinguish the quality of LED unit board? Look at the material
The first LED unit board : Some LED unit board manufacturers use low-cost flame-retardant paper board or single-sided fiber board as the PCB board of LED lamp for low price competition. Because, the full glass fiber PCB board is too expensive. At first, there is no difference in the effect. If you are lucky, you can still hold it for half a year or eight months. Under normal circumstances, it will break due to moisture, UV damage, oxidation, etc., resulting in the scrapping of the entire LED unit board. High-quality LED unit boards must use double-sided full-glass PCB boards, although the cost is high, but the quality is guaranteed.
Second IC : Observe whether the brand of the IC device used is consistent. What type of IC is used, and how many ICs are used to affect the quality of the board. Some merchants, in order to save costs, deliberately reduce the number of ICs when producing cell boards, or mix with other brands of ICs. Different ICs, how can we ensure the stability of the board performance?
The third lamp bead and chip : Looking at the naked eye, it is impossible to distinguish the quality of the lamp bead. It can only rely on long-term testing, which is the aging test that experts say. The practice of small workshops is to power on before leaving the factory to check whether the LED display is working properly and will not pass the long-term aging test. Because they can't afford this time and labor costs.
How to distinguish the quality of LED unit board? Specific inspection method introduction
Fourth: Check the appearance quality of the selected materials
1PCB sheet and processing quality;
2IC device brand and consistency;
3 luminous dot matrix quality;
The fifth inspection circuit design circuit design specification, PCB wiring meets the requirements of LED display technology
Sixth inspection welding quality
Check whether the patch has components missing or mislabeled, and whether there is a short circuit between the component pins and burrs. Check whether the solder joints of the straight plug are smooth and round, whether the board surface is clean and tidy, and there is no solder joint welding. Check the flatness of the illuminated dot matrix and the consistency of the ink color.
Seventh power-on test (refer to the steps of the “Performance Test Reportâ€)
1 power supply test the consistency of the luminous lattice;
2 The power-on test is effective for protecting the line drive tube CEM4953;
3 power test signal transmission capability.
LED display merchants, open your eyes! Rejecting cheap low-grade goods, quality is king;
The basic principle of LED must also be mastered, and knowledge can illuminate the road ahead.
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