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Outdoor LED Display (module) Routine Maintenance Instructions
Apr 29, 2017

1, multi-block module is not bright or abnormal: check the signal direction of the first block of abnormal 

module cable and the power cord is in good contact, such as the module without LED light, then no power

input, please check the power section (Available multimeter check), such as the appearance of color (with 

color confusion of the bright spot) that the module no signal input, please check the first block of the module

is not the normal input of the cable is tight, can be multiple plug test, If the problem can still exchange the 

new cable.

2, single-module does not light: check the module's power supply is good, mainly check the module on the

 power outlet is loose. If the block module appears color confusion or color inconsistency (but there is a 

signal input, the correct picture) for the signal transmission row of county contact bad, re-plug the cable,

or replace the test cable. Such as the replacement of a good cable still have the same problem, please check

the PCB board interface is a problem.

3, a single light does not light Detection method: Check the LED with a multimeter is damaged, if the light

is broken by the following 5 items for the lights. The specific test method: the multimeter hit resistance X1

file, pointer multimeter black pen then LED positive, red pen then negative (digital table black pen then 

negative, red pen then), if the LED light, the measured light is Well, if the light is off, the measured lamp is 


4, LED bad point maintenance (out of control points): After a single lamp test to confirm that the LED damage,

 according to the actual needs, the selective use of the following maintenance methods.

Front Maintenance: Remove the fixed face mask screws from the front with the corresponding screwdriver 

(remove the cover), remove the mask, change the lamp (change the lamp according to the following). After 

changing the lamp and colloid seal, The original mask to restore, tighten the screws (on the screw, please 

be careful not to suppress the lamp), and finally if the colloidal residue in the LED surface, please carefully 

remove the colloid.

Back Maintenance: Remove the cable from the back with the corresponding screwdriver (remove the screws)

from the back, unplug the signal cable, and do not unplug the power cable to prevent accidents. Carefully 

remove the module from the sheet metal hole Remove, move to the back of the box, and then follow the 

front maintenance method to maintain a single module for the lamp (please follow the lights for the following 

method) or repair the other.

5, for the lamp: the damaged LED around the colloids with sharp tools (such as tweezers) to remove, and 

make LED pin clearly exposed in the line of sight, right hand with tweezers pinch LED, left hand with a soldering

iron (temperature about 40 degrees, Excessive temperature will cause damage to the LED) Contact the solder 

and do a little stay (no more than 3 seconds, such as over time but does not meet the demolition requirements,

please cool and try again) Solder the solder and remove the LED with tweezers. Will be in line with the requirements

of the LED lights into the hole in the PCB circuit board, (LED lights long feet for the positive pole, short feet for the 

negative, PCB "square hole" for the LED positive pin jack, "round hole" for the LED The same type of colloid 

(PH value = 7), the same type of colloid (PH value = 7), the same type of colloid (PH value = 7), the same type 

of colloid (PH value = 7), the same type of colloid (PH value = 7) Sealed good LED.

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