Five common maintenance methods for outdoor LED display module failures

In the process of using outdoor LED displays, it is inevitable that imagination such as bad lights and partial black screens will appear. Generally, there are problems on the LED display module. Display module failures and solutions:

The LED display group is continuously off or abnormal:

This phenomenon usually causes a large area of ​​black screen in LED display

Solution: Check whether the cable and power cable of the first abnormal module in the signal direction are in good contact. If the LED display of the module is not on, it means there is no power input. The color (with bright colors) indicates that the module has no signal input. Please check whether the input end of the cable of the first abnormal module is in close contact. You can plug and unplug multiple times to test. line.

LED display bad point maintenance (out of control point):

After the single-lamp test confirms that the LED is damaged, the following maintenance methods are selectively adopted according to actual needs.

2-1 Front maintenance: Remove the screws of the fixed mask from the front with a screwdriver of the corresponding model (note the good screws), remove the mask, and change the lamp (please follow the method of changing the lamp below), change the lamp and gel After finishing, restore the original mask, tighten the screws (be careful not to press the lamp when you screw on), and finally, if there is gel remaining on the surface of the LED display, please carefully remove the gel.

2-2 Back maintenance: Remove the screws from the back with a screwdriver of the corresponding model (note the good screws), and unplug the signal cable. For safety, please do not unplug the power cable to prevent accidents. Carefully remove the module from the Take it out of the sheet metal hole, move it to the back of the box, and then perform maintenance on the single module according to the front maintenance method (replace the lamp according to the method below) or repair others.

Detection method of single light off:

It will cause the dead light phenomenon, the playback image is incomplete and unclear.

Use a multimeter to check whether the LED display is damaged. If the lamp is broken, change the lamp according to item 5 below. Specific measuring method: set the multimeter to the resistance X1 level, the black multimeter of the pointer type multimeter is connected to the positive electrode of the LED, the red multimeter is connected to the negative electrode (the digital meter is connected to the negative pen, the red pen is connected to the positive electrode). OK, if the light is off, the measured light is bad.

LED display single module does not light up:

Will cause the LED display module does not light up, a black screen appears there

Check whether the power supply of the module is good, mainly to check whether the power socket on the module is loose. If the whole module has color chaos or inconsistent colors (but there is a signal input and a correct picture), the contact of the signal transmission line is bad, replug the cable, or replace the tested cable. If a good replacement cable still has the same problem, please check whether there is a problem with the interface of the PCB board.

Change light

Remove the gel around the damaged LED display with a sharp tool (such as tweezers), and make the LED pins clearly visible in the line of sight. Hold the LED display with tweezers in the right hand, and use a soldering iron in the left hand (temperature is about 40 degrees. High temperature will cause damage to the LED display.) Touch the solder and stay for a while (not more than 3 seconds, if it exceeds the time but does not meet the disassembly requirements, please cool down and try again). Melt the solder and display the LED with tweezers. Screen removed.

Insert the LED display lamp that meets the requirements into the hole of the PCB circuit board correctly. Negative pin socket for LED), melt a little solder wire and stick it to the tip of the soldering iron, adjust the direction of the LED display with tweezers to make it stable, solder the solder to the place where the LED is connected to the PCB, and use the same type of gel Value = 7) Seal the LED display.