LED display module daily maintenance instructions

Author: From: Time: 2018-12-14

1. Multiple modules are not bright or abnormal: check whether the cable and power cable of the first module are in good contact with the signal. If the LED display module is not lit, it means there is no power input. Check the power supply part (check with a multimeter). If there is a suit color (a bright spot with color confusion), it means that the module has no signal input. Please check whether the input end of the first abnormal module cable is tightly contacted. Insert the test, if the problem can still be replaced with a new cable.

 
 
2, LED display single module does not light: check the module's power supply is good, mainly to check whether the power socket on the module is loose. If the whole module has color confusion or color inconsistency (but there is signal input, there is a correct picture), the signal transmission is poorly connected to the county, the cable is re-plugged, or the tested cable is replaced. If the replacement of the cable is still the same problem, please check the interface of the PCB board for any problems.
 
3, single lamp does not shine problem detection method: use a multimeter to check whether the LED is damaged, if the lamp is broken, press the fifth item below to change the light. Specific light measurement method: the multimeter is driven to the resistance X1 file, the pointer type multimeter black table pen is connected to the positive pole of the LED, the red meter pen is connected to the negative pole (the digital table black pen is connected negatively, the red pen is connected positively), if the LED is bright, the measured lamp is Ok, if the light is off, the measured light is bad.
 
4. ShenZhen LED display dead point maintenance (out of control point): After the single lamp detection confirms that the LED is damaged, the following maintenance methods are selectively adopted according to actual needs.
 
Frontal maintenance: Remove the fixed mask screws from the front with the corresponding type of screwdriver (remember to keep the screws), take the cover and replace the lamp (please change the lamp according to the following lamp replacement method), after the lamp replacement and the gel seal are finished, Restore the original mask, tighten the screws (be careful not to hold the lamp when screwing up), and finally remove the gel if the glue remains on the surface of the LED.
 
Shenzhen Scool LED display back maintenance: use the corresponding type of screwdriver to remove the screws from the back (note the screws), unplug the signal cable, for safety, please do not unplug the power cable to prevent accidents, carefully remove the module from Remove the sheet metal hole, move it to the back of the box, and then perform maintenance and replacement of the individual modules according to the front maintenance method (please change the lamp according to the following lamp replacement method) or repair other.
 
 
5, change the lamp: remove the gel around the damaged LED with a sharp tool (such as tweezers), and make the LED pin clearly exposed in the line of sight, the right hand with the tweezers to clamp the LED, the left hand with a soldering iron (the temperature is about 40 degrees, Excessive temperature will cause damage to the LED. Contact the solder and make a slight dwell (no more than 3 seconds, if it exceeds the time but does not meet the disassembly requirements, please try again after cooling). The solder is melted and the LED is removed with tweezers. Insert the LED lamp that meets the requirements into the hole of the PCB circuit board correctly. (The long leg of the LED lamp is positive, the short leg is negative, the square hole on the PCB is the LED positive pin jack, and the "round hole" is LED. Negative pin socket), melt a little solder wire, glue it on the soldering iron tip, adjust the LED direction with tweezers to make it smooth, solder the solder to the LED and PCB connection, use the same type of colloid (pH = 7) Seal the LEDs.
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