Outdoor LED display
in the use of the cause of the damage there are many, such as the need for waterproof, dust, heat, anti-corrosion, anti-static, lightning protection, small animals, and regular maintenance and repair.
Here are some routine maintenance measures:
1, the single module is not bright: check the power supply of the module is good, is mainly to check the power supply sockets on the module is loose. If the whole module appears color confusion or inconsistent color (but there is signal input, there is the right picture) for the signal transmission counties contact Bad, reseat the line, or replace the test of the line.
If the replacement of good line still has the same problem, please see the PCB board interface whether there is a problem.
2, multiple block module is not bright or abnormal continuously: check the signal direction of the first irregular module of the line and power cord contact is good, such as the module without LED light, indicating no power input, please check the power supply part (available multimeter check), such as the appearance of color (there is confusion of the bright spot) that the module has no signal input,
Please check whether the input of the first irregular module is in tight contact and can be reseated multiple times, such as the problem can still be replaced with the new line.
3, the single light is not bright problem detection method: Use the multimeter to check whether the LED is damaged, if the lamp is broken, press the 5th item to change the lamp below.
The specific method of measuring the lamp: the multimeter hit the resistor X1 file, pointer multimeter Black table pen connect the positive pole of the LED, Red table pen to connect the negative (digital form black pen, red pen), if the LED light, the measured lamp is good, if the light is not bright, the measured lamp is bad.
4, LED bad point maintenance (out of Control point): After a single lamp detection identified as LED damage, according to the actual needs, the selective use of the following maintenance methods. Positive maintenance: With the corresponding model of the screwdriver from the front will be fixed mask screws to remove (pay attention to keep the screws), remove the mask, change the lamp (please change the lamp according to the following method), change the lamp and colloid seal end, restore the original mask, tighten the screws (please do not press the lamp when screws),
5, if the colloid residue on the LED surface, please carefully remove colloid. Back maintenance: Use the corresponding model screwdriver to remove the screws from the back (pay attention to keep the screws), unplug the signal line, for safety please do not unplug the power connector to prevent accidental, carefully remove the module from the sheet metal hole, move to the back of the box, and then maintain a single module in accordance with the positive maintenance method to change the lamp (
Please change the lamp according to the light Change method below) or overhaul the other. 5, change the lamp: Will damage the LED around the colloid with sharp tools (such as tweezers) to remove, and make the LED pin clearly in sight, the right hand with tweezers clamp LED, left hand with a soldering iron (temperature about 40 degrees, too high temperature will cause damage to the LED) contact solder, and do a little stay (not more than 3 seconds, If more than the time but do not meet the requirements of disassembly, please cool and then try again) will solder melt, with tweezers will remove the LED. Properly insert the required LED lights into the PCB board holes, (LED lamp's long legs for the positive, short feet for the negative, PCB on the "square hole" for the LED positive pin jack, "round hole" for the LED pole pin Jack), will be a little solder wire melting, bonding in the iron tip, with tweezers to adjust the direction of the LED,
Make it smooth, solder welding in the LED and PCB connected, with the same type of colloid (ph value =7) sealed good LED. Large-scale LED display in the operation of the operator should also pay attention to the inspection, observation of the same sound, smell, light and other phenomena, such as the display screen for a long time, once again put into use to be in advance patrol. It is noteworthy that the SMD LED display
has not been used for a long time will lead to decreased reliability, recommended to use more than 1 hours per week, reduce moisture on the screen erosion.