Some Methods of Outdoor Full Color LED Display Installation and Wiring

　　Tools/raw materials: multimeter

　　Method/Step 1:

　　Check the power supply voltage: find out the positive and negative DC connection to the switching power supply, connect the 220V power cord to the switching power supply (connect it to the AC or NL terminal after confirming that the connection is correct), and then plug it in.

　　At this time, we will find that the power light will be on, and then use the DC gear of the multimeter to measure the voltage between V+and V - to ensure that the voltage is between 4.8V-5.1V. There is a knob beside which you can adjust the voltage with a cross screwdriver. In order to reduce screen heating and prolong its life, the voltage can be adjusted to 4.5V-4.8 in the case of low brightness requirements. After confirming that there is no problem with the voltage, disconnect the power supply and continue to assemble other parts.

　　Method/Step 2:

　　Turn off the power first

　　Connect V+to the red line and V - to the black line, respectively, to the control card and LED unit board, and the black line to the GND of the control card and power supply. The red wire connects the+5V of the control card and the VCC of the unit board. 1 power cord per unit board. When finished, check that the connection is correct.

　　Method/Step 3:

　　Connecting the control and unit board

　　Connect with the finished flat cable. Pay attention to the direction, and do not reverse the connection. Please note that the unit board has two 16PIN interfaces, one for input and one for output. The one near 74HC245/244 is input. Connect the control card to the input. The output is connected to the input of the next unit board.

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