LED display troubleshooting
The whole screen is not bright (black)
1. Check if the power supply is energized.
2. Check whether the communication line is connected or not. (Sync screen)
3. The sync screen detects the presence of the sending card and the receiving card.
4. Whether the computer monitor is protected, or the display area is black or pure blue. (Sync screen)
Folding unit block does not light (black)
1. Continuous row of the plate side of the direction is not bright, check the normal cell board and abnormal cell board between the cable connection is connected; or chip 245 is normal.
2. Continuous vertical direction of several plates do not light, check the column power supply is normal.
The cell board does not light up
1. Check whether the foot and 4953 output pin pass.
2. Check 138 is normal.
3. Check whether the 4953 hot or burned.
4, check 4953 whether there is a high level.
5. Check 138 and 4953 control whether the foot has a pass.
The unit board does not light
1. Check whether the normal 595.
2. Check whether the corresponding module is connected to the corresponding foot.
3. Check 595 output pin to the module pin is connected.
Unit board is missing
1. Check whether the 245R.G data is output.
Cited eighteen, LED display common monitoring and control measures First, the program updates
1. The use of local area network or personnel to the broadcast machine to update the program, security, personnel to the scene
2. Outside the network to update the program, as long as the network can update the program, increase the timeliness of program updates and save the staff on-site workload, reduce security, you can remotely attack the broadcast of the broadcast content, resulting in very bad consequences.
3. Solution In the middle of the network to increase the hardware isolation equipment, only the broadcast staff have the authority to isolate the cancellation, remote control of the start of the isolation device
Remote control and monitoring
1. Enabling remote control of large screen start and shutdown, and can be forced to start and shut down the device.
2. To achieve remote real-time video surveillance, where the Internet can always see the live screen broadcast situation, and now can achieve mobile phone monitoring, anytime, anywhere view the screen situation
3. The protective measures in the distribution cabinet include a variety of protection functions such as overcurrent, short circuit, power failure, etc., also equipped with corresponding fault indication equipment, convenient
4. The PLC receives the command signal sent by the network control station, generates various action logic, and can return the logical state and the fault information of each main contact back to the network system so that the network system can control and monitor the power supply circuit
