How to install full color in door small pitch LED video wall by yourself

1.Check the power supply voltage: find out the DC positive and negative connection switch power supply, connect the 220V power line to the switch power supply, (after confirming the connection is correct, connect to the AC or NL terminal) and then plug in the power. It will be found that a light will be on in the power supply, and then use a multimeter to measure the voltage between V + and V - in the DC gear, to ensure that the voltage is between 4.8v-5.1v, and there is a knob beside it, which can adjust the voltage with a cross screwdriver. In order to reduce the screen heating and prolong the service 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.
2. Turn off the power supply first: connect V + to the red line, V - to the black line, respectively to the control card and LED video wall panel board, and the black line to the GND of the control card and power supply. The red line 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.
3. Connect the control and LED video wall panel board: use the good cable arrangement and connection. Pay attention to the direction. Do not reverse. Please note that there are two 16pin interfaces on the unit board, one is input, one is output, and the one close to 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 RS232 data line: connect one end of the data line to the DB9 serial port of the computer and the other end to the control card, connect the 5-pin (brown) of DB9 to the GND of the control card, and connect the 3-pin (brown white) of DB9 to the rs232-rx of the control card. If your PC does not have a serial port, you can buy a USB to RS232 serial port conversion cable from the computer city.
5. check the connection again: check whether the connection is correct. The black line connects - V and GND. The red line connects + V and VCC + 5V.

6. connect 220V and open the downloaded software: under normal circumstances, the power light is on, the control card is on, and the screen is displayed. If not, check the wiring. Or check troubleshooting. Set screen parameters and send subtitles. Please refer to the software instructions for details.