1. Check the power supply voltage
Find the DC positive and negative connection switching power supply, 220V power cord connected to the switching power supply, (to confirm the connection is correct, connect to the AC or NL terminal) and then plug in the power. Will find a power light will be bright, and then use a multimeter, DC file to measure the voltage between V + and V- to ensure that the voltage between 4.8V-5.1V, next to a knob, you can cross screwdriver to adjust the voltage. In order to reduce the heating screen to extend life expectancy in the case of less demanding, you can adjust the voltage between 4.5V-4.8. After confirming that there is no problem with the voltage, disconnect the power supply and continue assembling the other parts.
2. Connect the power
Turn off the power first, connect V + to the red line and V- to the black line, connect to the control card and the LED unit board respectively, and connect the black line to the control card and the power GND. The red line connects the control card's + 5V to the cell board's VCC. 1 power cord per cell board. When done, check that the connection is correct.
3. Connect the control and cell board
Use good cable, connect. Note the direction, can not be reversed. Note that the cell board has two 16-pin connectors, one for input, one for output, and an input for the 74HC245 / 244 to connect the control card to the inputs. Output Connect to the input of the next cell board.