1, strictly prohibit the plug-and-unplug serial port, lest because of improper operation and damage computer serial port and control card serial port.
2, the system is strictly prohibited to adjust the input voltage of the control card when working, so as to avoid improper adjustment, high voltage and damage the computer serial port and control card serial port. The normal operating voltage of the control card is 5 v. When adjusting the power supply voltage, the control card should be removed and measured with a multimeter to adjust slowly.
3, strictly forbid the control card Earthing end and the display frame short connection, otherwise the display frame once gathers the static electricity, very easily damage the computer serial port and the control card serial port, causes the communication to be unstable, the static electricity serious will burn out the control card and the display unit on the screen body. Therefore, in the outdoor screen or communication distance, it is recommended that the user must use the serial port isolator, in order to avoid the ground loop, surge, inductive lightning, hot Plug and other harsh environment on the computer serial port and control card serial port damage.
4, must guarantee the control card and the computer serial port correct connection, lest because the input signal is incorrect and damage the control card serial port and the computer serial port.
5. The control card should not be connected to the Unit board. As far as possible directly to the switching power supply, the unit plate in the process of voltage and instability. will cause the control card fast and slow, serious can not communicate or program to fly need to repair, especially the U disk control card, in the case of voltage instability may not read or read a disk error.
6. Indoor, 16 sweep unit board should not be connected to the entire screen debugging, many indoor monochrome or two-color, or even full-color, and no debug state directly connected to the control card on the electricity, there is a possibility of large area burned the unit plate behind the sweep drive 4953 chip. debugging please only one unit board debugging, debugging finished unplug power, and then the control card, avoid.
7. Control Card please keep working in a dry, relatively stable environment, too high temperature, and humidity, as well as dust more environment, the control card is extremely unfavorable.
