Check the appearance quality of the selected material
1PCB sheet and processing quality;
2IC device brand and consistency;
3 luminous dot matrix quality;
Check circuit design circuit design specifications, PCB wiring meets LED display technology requirements
Check 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.
Power-on test (refer to the “Performance Test Report†steps)
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;
Copper Clad Steel ,Copper Clad Steel Highly Conductive,Copper Clad Steel Strand,Anti-Oxidation Copper-Clad Stee
changzhou yuzisenhan electronic co.,ltd , https://www.ccs-yzsh.com