[Lumii DLP] Replacing the Mainboard

The mainboard is like the brain of your 3D printer. It determines how various components such as the LCD, LED, motor, fans, and others operate. This article will guide you through the process of replacing the mainboard.

Over time, the mainboard may become faulty due to a variety of reasons, such as power surges, physical damage, or wear and tear. If your printer's mainboard is not working properly, you may need to replace it.

In this article, we'll walk you through the steps to replace the mainboard in Lumii DLP. By following these instructions carefully, you can get your printer up and running again in no time.

Power Down and Prepare

1. Turn off the printer and unplug the power cord.
2. Place the printer on a flat, stable surface.

Before You Begin

Tools Needed:

• 2 mm allen wrench
• 2.5 mm allen wrench
• 3 mm allen wrench
• 5 mm allen wrench
  

Removing the Front and Back Case

1. Use the 2 mm allen wrench to remove the eight screws (M3X6 screws) on the side of the printer securing the front and back case.
2. Gently pull the front case forward to open, avoid pulling it all the way open at once. While pulling, tilt the case forward at around 45-degree angle.
   
   

  Note: Make sure not to tug the touch panel cable while removing the front case.

3. Then use the 5 mm allen wrench to remove the two screws (M8X12 screws) on top of the printer.
   
4. Carefully remove both cases.
5. After removing the cases, the printer should look like this:

Replacing the Mainboard

Removing the Old Mainboard

1. Use the 2.5 mm allen wrench to remove the two screws on the top side of the irregular body column.
   
2. Carefully lie down the printer, then use the 3 mm allen wrench to remove the two screws at the bottom of the irregular body column.
   
3. Disconnect the touch panel cable on the mainboard.
   

4. Disconnect all cables/ wires that are linked to the mainboard.
   

Note: Before removing the cables or wires for the first time, apply alcohol to soften the red adhesive. This will make removal easier and help prevent damage.

5. Remove the mainboard by loosening the 4 screws.
   

Installing the New Mainboard

1. Install and secure the new mainboard.
2. Reconnect all cables and connectors.
3. Reinstall the front and back case. Before closing the case, make sure both the touch panel ribbon cable and USB extension cable are routed through the Round Support Column.
   
4. Perform a dry run test to ensure that the mainboard is functioning properly.