Gao Jin photoelectric led unit board wholesale Main, led unit board will share the following problems with your divided into four main points: 1, the entire board is not shining: mainly because of the power unit board missed or intraplate line connection error, resulting in circuit the positive and negative difference. 2, the board is not shining, transportation function properly: this is due to damage caused by the built-in circuit board led module can be 74HC138 4 feet and 5 feet caused by short circuit. 3, every three non-shiny: In 4953 the board is damaged. 4, interlaced shiny: to be able to analyze a circuit problem. ①: Check the cell plate Built 74HC245 and 74HC138 whether Weld. ②: use a multimeter to measure whether the 74HC138 1 pin voltage is about 2.5V, there will replace 74HC138 ③: measuring electricity transmission status lilies with ICA signals. Second, the internal LED lights led modular connecting lead off, resulting in the death produced no current through the LED lights, this situation will affect the normal operation of other LED lights, due to low voltage LED lights (red, yellow, Orange LED Operating voltage 1.8V-2.2V, blue, green and white LED operating voltage 2.8-3.2V), are generally required to join led module factory with series and parallel, to adapt to different operating voltage, LED lamp series more influence The larger, as long as there is an LED light inside connections open, it will cause the series circuit of a whole string of LED lights are not bright, visible this situation more serious than the first case to be. LED lights are dead affect product quality, reliability of the key 3528 led module, how to reduce and eliminate dead lights, improve product quality and reliability, is the package, the key issues to be addressed enterprise applications. led module, high Jinliang photovoltaic (certified), led module provided by the Jinan High Jinliang Optoelectronics Technology Co., Ltd .. Jinan High Jinliang Optoelectronics Technology Co., Ltd. (www.zhkyled.com) is an industry leader in Jinan, Shandong, liquid crystal device, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In high Jinliang photoelectric leadership with the staff warmly welcome all inquiries negotiations to create high Jinliang photoelectric a better future.