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LED display common troubleshooting methods
What is the reason why it is not loaded or communication is not available?
The reason for the lack of communication is not the same as the reason for being unable to load, it may be due to the following reasons, please check according to the listed items and operations:
1. Ensure that the control system hardware is properly powered on. (+5V)
2. Check that the serial cable used to connect to the controller is a straight through cable instead of a crossover cable.
3. Check and confirm that the serial port cable is intact and the two ends are not loose or fall off.
4. Select the correct product model, the correct transmission method, the correct serial port number, the correct serial transmission rate, and set the control correctly according to the DIP switch diagram provided in the soft body, in comparison with the LED screen control software and its own selected control card. Bits and serial transmission rates on the system hardware.
5. Check if the jumper cap is loose or fall off; if the jumper cap is not loose, make sure the jumper cap is in the correct direction.
6. If after the above check and correction still occurs, please use a multimeter to measure whether the serial port of the connected computer or control system hardware is damaged to confirm whether the computer manufacturer should be returned or hard to control the system. Body delivery also tested.
Second, when the LED screen just appeared on the power line for a few seconds or the cause of the screen changes?
After connecting the screen controller to the computer and HUB distribution board and screen, it is necessary to provide the controller with +5V power for normal operation (in this case, do not directly connect with the 220V voltage). At the moment of power-on, a few seconds of bright lines or “huaping†will appear on the screen. The bright line or “huaping†is a normal test phenomenon, reminding the user that the screen is about to start normal work. Within 2 seconds, this phenomenon is automatically eliminated and the screen enters a normal operating state.
Third, automatic or manual brightness adjustment is what it means?
Brightness adjustment refers to the adjustment made between the darkest and brightest display on the screen, rather than light adjustment. The automatic brightness adjustment is automatically adjusted to a predetermined brightness by the wide LED screen control system according to different brightnesses that should appear in different time periods. Manual brightness adjustment refers to the end user's operation of the LED screen control system, so that the LED screen reaches a certain brightness.
Fourth, the unit board appears the whole screen is not bright, dark
1. Visually inspect the power supply cable, the 26P cable between the unit boards, and the power module indicator.
2, using a multimeter to measure the normal voltage of the cell board, and then measure the power module voltage output is normal, if not, then determine the power module is bad.
3, measuring the power module voltage is low, adjust the fine-tuning (fine-tuning of the power module close to the lights) so that the voltage reaches the standard.
5. What are the reasons for the black screen on the LED screen?
In the process of using the control system, we occasionally experience the phenomenon of black screen on the LED screen. The same phenomenon may be caused by various reasons. Even the darkening of the screen may be different for different operations or different environments. For example, it may be black at the moment of power-up, or it may turn black during the loading process, or it may turn black after it is sent.
1. Make sure that all hardware including the control system is properly powered on. (+5V, do not connect, connect wrong)
2. Check and re-check whether the serial cable used to connect the controller is loose or missing. (If it becomes dark during the loading process, it may be caused by this reason. That is, it is interrupted during the communication process due to the looseness of the communication line. Therefore, the screen becomes black, and you should not assume that the screen body does not move, and the line cannot be loosened. Please check it by hand, which is very important for you to solve the problem quickly.)
3. Check and confirm whether the LED screen and the HUB distribution board connected to the main control card are tightly connected or not.