source:other news release time:2023-03-11 Hits: Popular:led screen wholesaler
With its unique creativity and high -definition visual experience, the full -color LED display has become a favorite device for users. Nearly year -round, the full -color LED display sometimes fails due to improper use. Tell you a few common fault detection methods.
If you want to do good jobs, you must first benefit your instrument, so you must safely perform maintenance work on the LED display, prepare common tools such as multimeter, screwdriver, etc., and perform maintenance in the order of severe to slightly. It should be processed first.
Short -circuit detection method: Using a multimeter to adjust to a short -circuit detection file. When it is detected as a short -circuit failure, it is treated with priority to avoid damage to other devices. At the same time, pay attention to processing when the device is powered off.
Voltage detection method: Using a multimeter to adjust to the voltage gear, test whether the voltage of the fault circuit board is consistent with the voltage of the normal circuit board.
Voltage Detection Method: Use a multimeter to adjust to the diode voltage drop detection file. When there is a current on the pin, there will be a voltage drop. According to the voltage value reduction, it will be determined whether it fail It is not recommended to use this method in the detection device of high resistance, because it is not detected.
Resistance test method: Use the universal meter to the resistance gear to test whether the resistance of the fault circuit board is consistent with the resistance of the normal circuit board.
In the process of controlling the system, we occasionally encounter the phenomenon of full screens with large LED screens. The same phenomenon may be caused by various reasons, and even the process of turning the screen is different from different operations or different environments. For example, it may be black at the moment of powering, or it may turn black during the loading process, or it may be black after the sending, etc.:
1. Please make sure that all the hardware including the control system is all right. (5V, do not connect, get wrong)
2. Check and repeatedly confirm whether the serial lines used to connect the controller are loose or falling off. (If it turns black during the loading process, it is likely to be caused by this reason, that is, during the communication process, the screen is interrupted because the communication line is loosened. Therefore, the screen becomes black. Please check it. This is 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 and inverse.
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