The mainboard functions as the printer’s main operating system. It determines how the fan, the motor, and the LCD screen function. We have separated the replacement into 2 parts: removing the old mainboard and installing the new mainboard.
For Sonic Mini / Sonic Mini 4K / Sonic Mighty
Part 1: Removing the old mainboard:
Step 1: Remove the plastic cover, the vat, and the build plate.
Step 2: Make sure the build plate on the Z-axis is retracted completely. If it isn’t, click TOOLS, and then click MANUAL, click on 10mm several times.
Step 3: Turn off the 3D printer and unplug the power cable.
Step 4: Flip the LCD 3D printer and remove the printer’s bottom with an m3 Allen wrench included in the toolbox.
Step 5: Remove the ➊ LED cable, ➋ fan cable, and the ➌ motor cable from the mainboard.
Step 6: Remove the two ribbon cables connecting to the ➍ LCD control board (brown) and the ➎ touch panel (white). Make sure to pull up the latch before removing the cable.
Step 7: Use an m2.5 Allen wrench and turn counter-clockwise to loosen the ➏ ➐ ➑ three screws holding the mainboard. Then remove the old mainboard.
Part 2: Installing the new mainboard:
Step 8: Rotate the printer as the picture included below and place the new mainboard in place. Make sure the ➒ USB port and the ❿ power cable port are in place. Then tighten the three screws.
Step 9: Re-connect the two ribbon cables and the three connectors.
Step 10: Place the bottom back onto the 3D printer and tighten the screws.
Step 11: Turn the LCD 3D printer upright. Plug in the power cable, and turn on the 3D printer.
Step 12: Perform the LCD test to ensure that the LCD screen is functioning properly.