When using the control card, in order to avoid unnecessary losses, we remind the user must note the following:
1, is strictly prohibited to plug the serial port, so as to avoid improper operation and damage the computer serial port and control card serial port.
2, is strictly prohibited in the system when working to adjust the control card input voltage, so as to avoid improper adjustment, the voltage is too high and damage the computer serial port and control card serial port. Control card normal operating voltage of 5V. Adjust the power supply voltage, you should remove the control card, with a multimeter to measure the slow adjustment.
3, is strictly prohibited control card grounding side and the display frame shorted, otherwise the display frame once gathered static, easy to damage the computer serial port and control card serial port, resulting in unstable communications, static electricity will burn out the control card and screen On the display unit. Therefore, in the outdoor screen or communication distance, it is recommended that users must use the serial isolator to avoid the ground loop, surge, lightning, hot swap and other harsh environments on the computer serial port and control card serial port damage.
4, must ensure that the control card and the computer serial port of the correct connection, so as not to damage the input signal is not correct and control the serial port and computer serial port.
5. Do not connect the control card to the unit board. To try to lead directly to the switching power supply, the unit board in the process of voltage and its instability. Will cause the control card when the slow, serious can not communicate or run the program to run back to repair, especially the U disk control card, in the case of voltage instability may not read the disk or read the disk error.
6. indoor, 16 sweep unit board should not take the whole screen debugging, a lot of indoor monochrome or two-color, or even full color, and then no debug state directly connected to the control card power, there may be a large area burned behind the unit board sweep drive 4953 chip The Debugging only one unit board debugging, debugging unplug the power, then control card, avoid.
7. Control card Please keep the work in a dry, relatively stable environment, too high temperature, and humidity, there are many dusty environment, the control card is extremely unfavorable.