With the rapid development of LED industry, LED display control card market demand is increasing, and wireless LED control card can well meet the customer unified management, the needs of the market sent by the cluster. For example, the residential area advertised LED screens, car screens, government projects, mobile, Telecom, and bank front screens. They could be installed in batches, be easy to manage, and achieve a state that required no maintenance, is the best choice for users. So users in the use of control cards, in order to avoid unnecessary losses, should pay attention to the following points:

    Control card please keep working in a dry, relatively stable environment, too high temperature, and humidity, as well as dusty environment, the control card is extremely unfavorable. Second, in the absence of power failure, it is strictly prohibited to plug the serial port, in order to avoid damage due to improper operation of computer serial port and control card serial port. 3. It is forbidden to adjust the input voltage of the control card when the system is live, so as not to damage the computer serial port and the control card serial port because of improper adjustment and high voltage. The normal operating voltage of the control card is 5v. When adjusting the power supply voltage, you should remove the control card and use the multimeter to measure the slow adjustment. 4. It is strictly forbidden for the grounding end of the control card to be connected with the frame of the display screen, otherwise, once static electricity accumulates on the frame of the display screen, it will easily damage the serial port of the computer and the control card, and cause the communication instability, serious static electricity will burn out the control card and screen on the display unit. Therefore, when the outdoor screen or communication distance is far, it is recommended that the user must use the serial port isolator, in order to avoid the ground circuit, surge, induction lightning, hot swapping and other harsh environment on the computer serial port and control card serial port damage.

Fifth, must guarantee the control card and the computer serial port the correct connection, in order to avoid because of the input signal is not correct damage control card serial port and computer serial port. Do not connect the control card to the unit board. To try to direct to the switching power supply, the unit board in the course of the operation of the voltage and its instability. Will cause the control card when fast and slow, serious can not communicate or program running need to repair, especially the U disk control card, in the case of voltage instability may not be able to read the disk or read the disk error. Seven, indoor, 16 sweep unit board must not be connected to adjust the screen, many indoor monochrome or dual-color, or even full-color, and then do not adjust the state directly control card power, it is possible to burn a large area of the unit board behind the line Sweep Drive 4953 chip. Debugging please only connect a unit board debugging, debugging finished unplug the power, and then connected to the control card. LED display control card is the core device, master the above control card use of common sense is very necessary.

文章來源：LED大屏網(wǎng)