Fault phenomenon, fault cause, fault analysis and handling
First、 Unit board does not light up
1. No+5v
2. The data cable is broken. 1. The power supply is broken, replace the power supply
Second、 Replacing the data cable causes the entire screen to not light up
1. The main controller does not have+5v
2. No AC power for the entire screen
Third、 Computer settings are incorrect
1. The power supply is broken, replace the power supply
2. Check the power supply circuit
Forth、 Reset. A certain unit is always red (or green) bright
1. There is a problem with the data cable connecting this unit
2. There is a problem with the corresponding distribution board
Fifth、 Fault of a certain fast unit board
1. Reconnect the data cable and pay attention to the direction
2. Change the data cable
3. Replacing the distribution board
4. Root replacement unit board
Six、 Abnormal communication
1. Is the software set up correctly
2. Is the communication line connected
Seven、 There is a problem with MAX323
1. Restart the computer and switch the display screen back on and off.
2. Reset.
3. Use a digital meter for measurement.
Eight、 Replace this MAX232. The entire screen lights up horizontally every few lines, but does not light up every few lines. The network cable is not properly plugged in. The large screen display is normal, the computer is black, and the computer settings are incorrect. The information on the first few screens is normal, and the information on the next few screens is abnormal
1. The screen has limited capacity and sends too many messages
2. Memory device not erased 1. Resend, subtract some unnecessary information
2. Resend
Nine、 Information team, but the font lacks strokes
The size of the information created does not match the size of the screen. Please redo the information and set the size to match the size of the screen