Outdoor LED Display module maintenance
1. Several modules successively do not work or unnormal
Check the signal direction's first un-normal module ribbon cable and power cable connect well or not, if the module do not work, which indicate no power input, please check the power supply (use multimeter checking), if pattern and color appear (with disordered color lightspot) that indicate no signal input, please check the first un-normal module ribbon cable input terminal connect close or not, pluck and insert repeatedly, if the problem is still there, please change the ribbon cable.
2. Sigle moduel does not work
Check the module power supply is well or not. Mainly check the module power socket loose or not. If the whole module appears disorder colors or inconsistent colors (with signal input, and correct image), which indicate the signal transfer ribbon cable poor connection, reconnect the cable again, or change the tested cable. If change the new cable and the problem still there, please check the PCB board port.
3. The checking way for sigle LED lamp do not work
Use multimeter check the led damage or not, if it is, change the LED according to below step 5, specific testing lamps method: take the multimeter to resistor x1 level, pointer style multimeter use back probe connect LED positive pole (+), and red probe connect negative pole (-) (number multimeter black probe connect negative pole (+), and red connect positive pole (-) if LED light, the lamp is ok, if not, the lamp is not good.
4. LED bad pixel-maintaining (out of control spot)
After single LED checking, if the LEDs is damaged, adpot the below method selectively according to the realistic request.
4-1 Front maintain
Using screwdriver to loose the screw which fixed the mask (pay attention to keep the screws), take off the mask,change the lamp (please change the lamps according to following method), change the lamps and seal with glue, recover the mask, tight the screw (do not press the lamps), if there is glue leaving on the surface of the LED, clear the glue away at last.
4-2 Back maintain
Using screwdriver loose the screw from the back (keep the screws), pull the signal ribbon cabel, in case of the accident and keep safety do not pull power wire, take care to take off the moudle from the metal plate of gold hole, and remove it to the cabinet back, then change the lamp according the front maintain steps (please change the lamps according to following method), or inspect others.
5. Change lamp
take off the glue around the LED with sharp tool (such as tweezer), make the LED pin show clearly, clip the LED by the tweezer with your right hand, and use the solder iron soldering tin by another hand, (keep the temperature to around 40, too high temperature will damage the LED), leave for a moment (do not exceed 3s, if exceed the time and do not loose LEDs successfuly, try again after it cool), make the tin melting, take off the LED by tweezer, and insert the good LEDs in right way (LED lamp's long pin is positive pole, and short is negative pole, square hole on PCB for positive pole, and round hole for negative pole), melt a little tin wire by the solder iron, adjust the LED direction by the tweezer, make it smoothly, and soldering tin between LED and PCB, use same type gule seal the lamp (PH =7).