Identify the quality of the LED display unit board
How the LED display unit board quality can be identified from the following aspects:
1. Check the appearance quality of the selected materials.
a, PCB sheet and processing quality.
b, IC device brand and consistency.
c, the quality of the luminous lattice.
2, check the circuit design circuit design specifications, PCB wiring in line with LED display technology requirements.
3, check the welding quality Check whether the patch has components missing, staggered, whether there is a phenomenon of component pin burr short circuit.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.
4, power-on test.
a. Power-on test the consistency of the luminous lattice.
b. Whether the power-on test is effective for the line drive tube CEM4953.
c. Power transmission test signal transmission capability.
Dalian Xinghai Technology Co., Ltd.