How to repair SMD led display screen

Replacing LED is the basic skill of repairing led display screen. And as long as a technician commands the skill of soldering work, it would be easy for them to learn how to replace the LED.

In our support page, you could find the tutorial showing how to replace the DIP type LED(oval 346, 546). And to replace the SMD type LED(SMD3528, SMD3535, SMD5050 etc), the process is similar. Please see below:

1. Disassemble the mask on the LED module.

2. Disassemble the LED(the tins should be on both sides).
You must do this very careful, to avoid hurting the board.

3. Place the new SMD LED on the board.

4. Solder the LED on the board.
This is the most difficult part of all this process. The SMD LED is easily burnt under the high temperature.

5. Assemble the mask.

After the whole process, you could connect the module with the control card to test if it's fixed.

But you must notice that the key point to do the LED display repair is to find out the failure reason. From the failure you see, you should know what is the possible reason to cause this failure - LED itself, driving IC, PSU or some other parts. And sometimes you need to eliminate the failure reason one by one, till you find the point. And to do this good, you must be very familar with the technical things about LED display screen, as well as the experiences.