LED Display Screen Maintenance And Usage Precautions
With the widespread use of LED displays, there are increasing usage problems.
In order to better use LED display related products, we have made some feasible summaries on related usage precautions and daily maintenance.
1. Precautions for Use Environment
3. Precautions For Power Supply
5. Moisture-proof and Storage Requirements
6. Common Faults of LED Display Screens and Troubleshooting Methods
7. LED Display Screen System Troubleshooting
1. Precautions for Use Environment
(1) The working environment temperature range is -20°C≤t≤50°C, and the working environment humidity range is 10% to 90%RH;
(2) Avoid use or storage in high temperature, high humidity, high acid/alkali/salt environments;
(3) Keep away from flammable items, gases and dust;
(4) Avoid strong collisions and sharp objects during transportation;
(5) When the ambient temperature is too high or the heat dissipation conditions are not good, be careful not to use the screen for a long time:
(6) When an LED display with a humidity exceeding the specified humidity is powered on, it will cause corrosion of parts and even short circuit, causing permanent damage:
(7) It is strictly forbidden to allow water, iron powder and other metal objects that are easily conductive to enter the screen.
The LED display screen should be placed in a low-dust environment as much as possible. Large dust will affect the display effect, and too much dust will cause damage to the circuit.
If water enters for any reason, please cut off the power immediately and wait until all components inside the screen are dry before use.
2. Switch Screen Precautions
(1) Open the screen: first open the control computer to make it work normally and then open the LED display screen;
(2) Turn off the screen: first turn off the LED screen power supply, turn off the control software, and then turn off the computer correctly:
(Turn off the computer first and turn off the display screen, which will cause high highlights in the screen body, burn the lamp tube, and the consequences are serious);
(3) Switch screen time interval should be greater than 5 minutes;
(4) Avoid opening the screen in the all-white state, because this is the maximum power state, which has the largest impact current on the entire power distribution system.
3. Precautions For Power Supply
(1) The LED module is powered by DC +5V (working voltage: 4.2~5.2V). It is prohibited to use AC power supply.
It is strictly forbidden to reverse the positive and negative poles of the power terminals (note: once reversed, the product will be burned or even cause a serious fire) ;
(2) Power supply voltage of LED display: 220V±10% frequency 50HZ±5%;
(3) If any abnormality such as short circuit, tripping, wire burning, smoke, etc. is found, the power should not be repeatedly tested and the problem should be found in time.
(4) Keep the power supply stable and provide grounding protection to avoid lightning strikes.
Do not use it under harsh natural conditions, especially strong lightning weather:
(5) The LED display screen is not allowed to play the highest brightness all-white picture for more than half an hour to avoid excessive current, heating of the power cord, damage to the LED light, and affecting the service life of the display screen. It is recommended to play dynamic videos mainly;
(6) During the use of LED display products, the power cannot be turned on and off continuously. There should be at least 1 minute between operations;
(7) Non-professionals are prohibited from touching the internal circuits of the large LED display screen to avoid electric shock or damage to the circuits.
If there is a problem, please ask professionals to repair it.
4. Cleaning Precautions
(1) Regular cleaning and maintenance: The large LED full-color display screen is exposed to wind, sun, and rain in the outdoor environment for a long time.
Even if the indoor LED display screen is used for a long time, more dust and rain will accumulate on the screen.
Traces of scouring, which need to be cleaned regularly and promptly to prevent them from affecting the viewing effect.
(2) If you need to clean the module surface, please use a soft brush and brush gently.
It is prohibited to use any liquid substance to clean the surface of the LED module, otherwise the LED lamp beads may be damaged;
(3) Correct wiping: The surface of the large LED display screen can be wiped with alcohol, or dusted with a brush or vacuum cleaner. It cannot be wiped directly with a wet cloth.
5. Moisture-proof and Storage Requirements
(1) Storage temperature requirements: ambient temperature -40°C≤t≤60°.
After opening the package, LED products must be stored in an environment with a temperature <30°C and a humidity <60%;
(2) According to the environmental conditions of the display body and control part, anti-rodent pesticides should be placed when necessary to avoid insect bites:
(3) The LED display cannot be turned off for a long time. In a high-humidity environment, if the screen has not been used for more than 3 days, a preheating lighting method must be used every time the screen is lit: 30%-50% of the brightness must be preheated first.
4-8 hours, then adjust to normal brightness (80%-100%) and light up the screen to remove moisture so that there is no abnormality during use; if the screen has not been used for more than 7 days, light up the screen each time.
It is necessary to use the preheating lighting method: Preheat at 30%-50% brightness for more than 12 hours, then adjust to normal brightness (80%-100%) to light up the screen to remove moisture so that there are no abnormalities during use.
6. Common Faults of LED Display Screens and Troubleshooting Methods
(1) The whole screen is not lit (black screen)
A. Check whether the power supply is on.
B. Check whether the communication line is connected and whether it is connected incorrectly. (Synchronous screen)
C. The synchronous screen detects whether the green light of the sending card and the receiving card is flashing.
D. Whether the computer monitor is protected, or the display area of the display screen is black or pure blue. (Synchronous screen)
(2) The whole unit board is not lit (black screen)
A.If several consecutive boards are not lit in the horizontal direction, check whether the wiring connection between the normal unit board and the abnormal unit board is connected; or whether the chip 245 is normal.
B. If several consecutive boards are not lit in the vertical direction, check whether the power supply of this column is normal.
https://youtu.be/PKYmBzw9Egk?si=VWcjhGyCUen9GsBj
(3) The unit board is not lit in the up direction
Check whether the row pin is connected to the output pin of 4953.
Check whether 138 is normal.
Check whether 4953 is hot or burned.
Check if 4953 has a high level.
Check if 138 and 4953 control pins are connected.
(4) Unit board is not lit
Check if 595 is normal.
Check if the corresponding pins of the upper and lower modules are connected.
Check if the 595 output pin is connected to the module pin.
(5) Unit board is missing color
Check if 245 R.G data is output.
Check if the normal 595 output pin is connected to the abnormal 595 input pin.
7. LED Display Screen System Troubleshooting
Step 1: Confirm Graphics Card Settings
Check if the graphics card setting part is set up.
The setting method is in the electronic file of the CD according to the needs. Please refer to it.
Step 2: Verify Basic System Connections
Check the basic connection of the system, such as whether the DVI cable and network cable socket are correct, the connection between the main control card and the computer PCI socket, the serial port cable connection, etc.
There are illustrations for the connection method, please refer to it carefully
https://www.youtube.com/watch?v=2xVlMwYTXOg&list=PLUgmg_7JffCNWX8R58dnHeIJ2lFFrOAhJ&index=4
Step 3: Ensure Adequate Power Supply
Check if the computer and LED power supply system meet the usage requirements.
When the LED screen power is insufficient, when the display is close to white (high power consumption), the screen will flicker.
Prepare a suitable power supply according to the power requirements of the cabinet.
Step 4: Check Sending Card Indicator Light
Check whether the green light of the sending card flashes regularly. If it flashes, go to step 6.
If it does not flash, restart. Before entering win98/2k/xp, check whether the green light flashes regularly. If it flashes, go to step 2.
Please check whether the DVI cable is connected properly. If the problem is not solved, one of the sending card, graphics card and DV cable I is faulty.
Please replace them separately and repeat step 3.
https://www.youtube.com/watch?v=TxWNT7d01mc&list=PLUgmg_7JffCNWX8R58dnHeIJ2lFFrOAhJ&index=5
Step 5: Software Configuration
Please set according to the software instructions or reinstall and set again until the green light of the sending card flashes, otherwise repeat step 3.
Step 6: Check Receiving Card Status
Check whether the green light of the receiving card flashes synchronously with the green light of the sending card.
If it flashes, go to step 8 to check whether the red light is on. If it is on, go to step 7. If it is not on, check whether the yellow light is on.
If it is not on, check whether the power supply is connected inversely or the power supply has no output. If it is on, check whether the power supply voltage is 5V.
If so, turn off the power, remove the adapter card and the cable and try again. If the problem is not solved, it is a receiving card failure. Replace the receiving card and repeat step 6.
Step 7: Inspect Network Cable and Receiving Card
Ensure the network cable is properly connected and not overly long (use standard Cat5e cables, maximum 100 meters without a repeater).
Check if the cable is made to standard. If the issue persists, replace the receiving card and repeat Step 6.
Step 8: Confirm Screen Power Status
Check whether the large screen power light is on.
If it is not on, go to step 7 to check whether the adapter card interface definition line matches the unit board.
Important Note
If parts of the screen show no image or appear distorted after setup, it is usually caused by loose RJ45 network cables or an unpowered receiving card.
Simply reconnect (or replace) the network cable or reattach the receiving card’s power (pay attention to the correct polarity) to resolve the issue.
More LED Display Troubleshooting Videos
https://youtu.be/8q5szDDSKLs?si=lkUz09pyynIsOW1Fhttps://youtu.be/3wRxrVkGRtE?si=h1NBNKBsxzCvskZXhttps://youtu.be/HGt0uaPaOC0https://youtu.be/k4sn6rjcN70