How to repair IMD 4 in 1 LED screens

IMD Versus SMD

IMD (Integrated Mounted Device)LED were recently introduced to the market, as a technology between SMD (Surface Mount Device) and COB (Chip On Board) LEDs, it has advantages and disadvantages, we did see many customers bring their modules with dead pixels to repair.

4 in 1 IMD LED bulb has 4 LED bulbs each consisting 3 color LEDs built into 1, so there are 12 LEDs, with 8 solder pins.

SMD packed LED bulbs have 3 colors (Red, Green, Blue) diodes built together, 4 solder pins.

Difference of IMD and SMD modules

IMD modules

IMD modules have LED chips mounted on the PCB board, without masks.

SMD modules

SMD modules have masks to cover the solder pins

Repairing IMD modules

It's pretty much the same way as do SMD modules, solder, heat gun are used, the important things to attention is:

  1. The IMD LEDs have 8 pins, and the pins are totally under the chip, which are not direcly exposed to heat gun air, to solder and desolder requires higher temperature;

  2. There are 8 pins, the solder plate must be clean and flat to ensure the chips stay on the board at heat air flow;

  3. Temprature and timing of the heat gun is key to repair

Repaired modules with burned LEDs

The obvious defects at power on

Our Methods

With years experience and innovation, we have developed an efficeint way to repair the IMD modules with cold solder, missing pixels, deam modules, ...

  1. We pre heat the PCB board to a certain temprature;

  2. We heat both surface of the PCB board;

  3. We use innovative jigs at operation;

  4. Our technology works on any modules with hidden solder pins.



If you have such modules with IMD LEDs or SMD1515 less, contact us, jeff.mrled@gmail.com, we are here to help.