The control card is the core component of the full-color LED display. It is mainly responsible for receiving the picture display information from the computer serial port, putting it into the frame memory, and generating the serial display data and scanning control timing required by the LED display according to the partition drive mode. We can see the importance of the LED display control card from the word "core component".

Common problems in the use of the LED display control card are generally divided into: display problems, communication problems, functional requirements problems, and the three-step solution: press the test button (test the connection of the power supply and the cable), and click the switch in the software for serial communication. The machine (test port and communication line), disconnect the power supply, and then power on (initialize) after all the lamp beads are off.
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1. When the control card is normal, why is there no display on the display or abnormal brightness?

   Answer: After the control card is connected to the display driver, the default is 16 scans. If there is no display, please check whether the data polarity and OE polarity settings in the control software are correct; if the brightness is abnormal, one line is particularly bright, indicating that the OE setting is reversed , Please set OE correctly.

   2. Why can't the screen display normally after the information is loaded?

   Answer: Check whether the scan output selection in "LED display control card settings" is correct.

   3. After the transmission is successful, the display screen shows garbled, garbled, and regular movement (the characters cannot be seen)?

   Answer: The typical scanning method is wrong. For semi-outdoors and outdoors, 4 scans are common, 16 scans indoors, 8 scans for car screens, and the settings screen parameters are changed and saved and sent successfully.

   4. After the transmission is successful, a horizontal bright line appears on the display, the one that lights up every few lines?

   Answer: The direction of the cable is reversed. Press the test button (included on the control card). In this case, it is generally not switched. Just connect the end connected to the led display and the control card in reverse.