Inspection, maintenance and training of a block diagram 1) understanding and familiarity display electrical system. 2) bearing in mind the connection relationship between the parts. Learn to judge when system problems, failure on which links. According to the case of failure to take appropriate measures to deal. 3) Learn master works and interface requirements, learn to judge whether the master failure can occur. Since the master design is quite complex, but a problem led, customer shall promptly notify the manufacturer or return it to the manufacturer, the factory for repair processing. Never attempt to dispose of, damage incurred, manufacturers shall not be liable. 4) Learn master works and interface requirements, learn to judge whether a failure can occur master box. Since the master cabinet design is quite complex, if there are problems, the customer should promptly notify the manufacturer or return it to the manufacturer, the factory for repair processing. Never attempt to dispose of. LED luminous characters display the common problems and solutions color decay very quickly: just install a good word luminous color emitted pure bright colors can be used less than a year to significantly dim down. Make the font becomes red is not red, not green, green is very ugly. Workaround: LED lamp is generally safe to use current 20 mA full color led display, led display installed more than this value, although the brightness will increase the number, but the color will be significantly accelerated decay. Therefore, when buying already assembled LED modules must test its output current. Less than 20 mA brightness is not enough, more than 22 mA of LED life, so that the color decay faster. led display, Wuhan led, in Eagle Technology led by Eagle Technology Co., Ltd. in Wuhan. Wuhan Eagle Technology Co., Ltd. (www.jishengled.com/)(www.jishengled.com) strong, credible, in Wuhan, Hubei diode industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the Eagles into the brilliant science and technology and you work for a better future!