LED large screen fault maintenance manual


?The LED large screen is composed of several parts. Any problem with any part will cause the whole LED large screen to work abnormally. Therefore, as a daily management and operator, it is very necessary to simply troubleshoot the LED large screen. Today we will come Analyze how to find the cause and effectively eliminate it when the LED large screen is not working properly. Common Problem Description Possible Causes Solutions All general LED large screens 1. The whole LED large screen is not bright and there is no image display on the screen 1. The sending card is not powered on; 2. The sending card has no DIV signal; 3. The main network cable is damaged; 4. The screen is not powered on; 1. Supply power to the sending card; 2. Check whether the graphics card is set to copy mode; replace the DVI signal cable; 3. Replace the network cable or re-insert the crystal head; 4. Power the LED large screen box; 2. Part of the box The body is not bright. The box is not bright along the signal direction. 1. The network cable is loose; 2. The network cable connected to the previous box is damaged; 3. The output of the previous card is bad; 4. The receiving card of the first box that does not light up Bad; 5. Not powered on; 1. Plug the network cable tightly; 2. Replace the box to connect the network cable; 3. Replace the previous receiving card; 4. Replace the first receiving card that is not bright; 5. Power on; 3. Large screen The overall blurry display is messy and irregular 1. The program of the receiving card is lost; 2. The sending card is damaged. 1. Resend the loading file; 2. Replace the sending card.

4. The blurry display of individual cabinets is messy and irregular 1. The receiving card program is lost; 2. The HUB card is loose or damaged; 3. The receiving card is damaged; 1. Resend the loading file; 2. Insert the HUB tightly or replace it; 3. Replace the receiving card. 5. The entire large LED screen displays dislocations and individual cabinets are displayed normally, but they are not connected into a complete picture 1. The display connection file is not sent; 1. Make and send the display connection file; 6. The LED module has few colors RGB lacks one or two colors 1. The input signal cable is faulty or loose; 2. The signal IC problem; 1. Tighten or replace the input cable; 2. Replace the LED module; Appears on the scanning screen 1. If the four-scan screen has three columns of solid lights, and the eight-scan screen has seven solid lights, replace the one that is not lit, and so on for other scanning screens; 2. IC problem. 1. Replace the LED that is not bright or dim; 2. Replace the module; 8. The area of ​​the LED module is not bright or the color area is very regular, rectangular or square; 1. Driver IC problem; 1. Replace the module; 2. .Find the corresponding IC and replace the IC; 9. A certain part of the cabinet flashes; a certain part of the cabinet puts a specific video flash; 1. The clock of the loaded file is too high; 1. Reduce the clock of the loaded file; 10. The whole screen suddenly flashes horizontal bars or The vertical flashing bar divides the screen into two or more cut-off parts in a short time; 1. Network cable problem; 2. Receiving card problem; 1. Observe the large screen to see which cabinet flashes first. Replace the network cable between the first flashing cabinet and the previous non-flashing cabinet; 2. Replace the first flashing receiving card.

Conventional LED large screen series 1. A single led module does not light up. This single module is generally the last module in each row of the cabinet. 1. The cable is loose or damaged; 2. The power cord is loose; 3. The module is faulty; 1. Restart 2. Plug in the power cord tightly; 3. Replace the led module; 2. One line of led modules does not light up, and a row of modules behind the signal of this module does not light up. The group cable is not tightly inserted or damaged; 2. There is a problem with the input of the first module that does not light up; 3. There is a problem with the output of the previous normal module; 1. Tighten or replace the cable between the two; 2. .Replace the first module that does not light up; 3. Replace the normal display module in the front; 3. A single cabinet does not light up and other cabinets are normal, only the middle one does not light up 1. The HUB card and the receiving card are not tightly inserted; 2. .HUB card is broken; 3. The receiving card is broken; 1. Insert the HUB card and receiving card tightly; 2. Replace the HUB card; 3. Replace the receiving card; floor tile LED large screen series Where, generally only one module is affected 1. The corresponding cable connecting the module is loose or damaged; 2. The seat on the led module is loose; 3. The internal HUB head is loose; 4. HUB problem; 5. Module row The pin is not plugged in; 6. There is a problem with the led module itself; 1. Re-plug or replace the line; 2. Replace the module signal power socket; 3. Insert the corresponding HUB interface; 4. Replace the HUB; 5. Pull out Module Check whether the pin header of the module is bent, whether it is well connected with the driver board, and re-insert it; 6. Replace the module; curtain wall LED large screen series 1. One row of lights is not bright One or several rows of lights of a single module are not bright 1. Driver IC problem; 2. Line management problem; 1. Find the corresponding IC and replace it; 2. Find the corresponding line tube and replace it; 2. The box flickers and flashes when the single box is on and off 1. One or several Short circuit between the positive electrode of the module pin header and the box frame 1. Remove the led modules one by one until the box is normal, and correct the crooked pin header; .

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