Reasonable and standardized wiring of LED large screens can reduce the failure rate and safety of the product, and avoid safety accidents. Many people may know the wiring layout of general wires. Here, Tuosheng Optoelectronics LED display will tell you that LED large Screen installation wiring method. What should I pay attention to when wiring large LED screens?

  Many LED large screen failures are caused by improper installation and wiring, so you need to strictly follow the installation steps during the installation of the LED large screen. The following Topsun Optoelectronics manufacturer will explain the wiring method when installing the large LED screen.

  1. Check the power supply voltage, find out the DC positive and negative connections to the switching power supply, connect the 220V power cord to the switching power supply, (after confirming the connection is correct, connect it to the AC or NL terminal) and plug it in. You will find that a light on the power supply will turn on, and then use a multimeter to measure the voltage between V+ and V- in the DC range to ensure that the voltage is between 4.8V and 5.1V. There is a knob next to it, and you can adjust the voltage with a Phillips screwdriver. In order to reduce the heat generation of the screen and prolong its life, the voltage can be adjusted to between 4.5V-4.8 when the brightness requirement is not high. After confirming that there is no problem with the voltage, disconnect the power supply and continue to assemble other parts.

  2. Turn off the power first. Connect V+ to the red wire, V- to the black wire, respectively connect to the control card and the LED unit board, and connect the black wire to the GND of the control card and the 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. After completion, please check whether the connection is correct.

  3. Connect the control and unit boards, and connect them with the prepared cables. Pay attention to the direction and cannot be reversed. Please note that there are two 16PIN interfaces on the unit board, one is input, one is output, and the one near the 74HC245/244 is input. Connect the control card to the input. The output is connected to the input of the next cell board.

  4. Connect the RS232 data cable, connect one end of the finished data cable to the computer's DB9 serial port, and the other end to the control card, connect the DB9 pin 5 (brown) to the GND of the control card, and connect the DB9 pin 3 (brown and white) Connect to the RS232-RX of the control card. If your PC does not have a serial port, you can go to the Computer City to buy a USB to RS232 serial port conversion cable.

  5. Check the connection again to see if it is correct. The black wire is connected to -V and GND. The red wire connects +V and VCC +5V.

  6. When 220V is connected, under normal conditions, the power light is on, the control card is on, and the screen is displayed. If it is not normal, please check the connection. Or check error troubleshooting.

  7. Open the downloaded software, set the screen parameters, and send subtitles.