LED screen common fault solutions

2021/01/12

What is the reason for the failure of loading or communication?

The reasons for the failure of communication and loading are roughly the same, which may be caused by the following reasons. Please compare with the operation according to the listed reasons:

1. Ensure that the hardware of the control system is properly powered on.(+ 5 v)

2. Check and confirm that the serial line used to connect the controller is a straight line, and not a cross line.

3. Check and confirm that the serial connection line is intact and there is no loosening or falling off at both ends.

4, the LED screen control software and their choice of control card to choose the correct product model, the correct transmission mode, the correct serial port number, the correct serial transmission rate and the software provided by the dialing switch diagram to correctly set the control system hardware on the address element and serial transmission rate.

5. Check whether the jumper cap is loose or off;If the jumper cap is not loose, make sure the jumper cap is in the right direction.

6. If the loading still fails after the above check and correction, please use a multimeter to measure whether the serial port of the connected computer or the hardware of the control system is damaged to confirm whether it should be returned to the computer manufacturer or the hardware of the control system for testing.

LED screen common fault solutions

Two, the LED screen just on the power when a few seconds of bright line or screen picture changed flowers?

After the screen controller is properly connected to the computer, the HUB distribution board and the screen, it is necessary to provide +5V power supply to the controller to make it work normally (at this time, do not directly connect to the 220V voltage).

At the moment of power on, a bright line or "splash screen" will appear on the screen for a few seconds, which are normal test phenomena and remind the user that the screen is about to start working normally.Within 2 seconds, the phenomenon automatically eliminated, the screen into the normal working state.

Three,What is the meaning of automatic or manual brightness adjustment?

Brightness adjustment refers to the adjustment between the dimmest and brightest the screen can display, not the sensitivity adjustment.Automatic brightness adjustment is based on the different brightness should appear in different time period and the accomplished wide LED screen control system automatically adjust to a certain predetermined brightness.Manual brightness adjustment refers to the operation of the LED screen control system by the end user to make the LED screen reach a certain specified brightness.

Four, the unit board appears the whole screen is not bright, dark bright

1. Visually check whether the 26P cable between the power cable and the unit board and the indicator light of the power module are normal.

2. Use a multimeter to measure whether the unit board has normal voltage, and then measure whether the output voltage of the power module is normal. If not, it is judged that the power module is broken.

3. Measure the voltage voltage of the power module and adjust the fine tuning (the fine tuning of the power module near the indicator light) to make the voltage reach the standard.

Five, what is the reason why the LED screen appears all black?

In the process of using the control system, we will occasionally encounter the phenomenon that the LED screen is all black.The same phenomenon can be caused by a variety of different reasons, and even the process of darkening the screen can vary from operation to operation or from environment to environment.

For example, it may become black as soon as it is powered on, it may become black during loading, it may become black after sending, etc. :

1. Please ensure that all hardware, including the control system, is properly powered on.(+5V, do not reverse connection, wrong connection)

2. Check and reconfirm whether the serial port line used to connect the controller is loose or falling off.(If it gets black during loading, it is likely to be caused by this reason, that is, the communication line is loosened and interrupted during the communication process, so the screen becomes black. Do not think that the screen body does not move, and the line can not be loosened. Please start to check, which is very important to quickly solve the problem.)

3. Check and confirm whether the HUB distribution board connected to the LED screen and the main control business card printing is tightly connected and plugged in.