M (Main PCB) Board Replacement Guide



In this guide, we will explain how to replace the M board (main PCB) for the M3D PRO. You will need a 2.0mm hex screwdriver for the disassembly and you’ll want to be in an anti-static environment. Some electronics will be exposed during the disassembly and there is a chance you could damage them. We recommend not working on a carpeted area and to discharge before working. You can do this by touching something metal (Not the printer) for at least one second. Wearing an antistatic wrist-wrap would be good. Link for a wrist-wrap here https://www.amazon.com/Rosewill-Anti-Static-Components-RTK-002-Yellow/dp/B004N8ZQKY/ref=sr_1_1?ie=UTF8&qid=1494531998&sr=8-1-spons&keywords=anti+static+wrist+strap&psc=1 Although, it is highly recommended to use an antistatic wrist-wrap, if you do not have access to the antistatic wrist-wrap, you can do the repair process by having a metal contact to your body throughout the repair.



  1. Remove the print bed as shown in the picture below:


2. Remove the four 2mm hex drive screws that holds the top of the base (fluff). 


3. Pull the top of the base (fluff) up.



4. This is how the top of the base (fluff) should be raised.


5. Next, remove the 2mm hex drive screws that secure the front and rear cube plastic parts

6. This is how the printer should look like after removing the cube front.


7. Now, remove the rear cube part as shown in the picture below.


8. If the print head is too low, twist the threaded rods in order to raise it up further.



9. Now, you would need to get access to the PCB that is mounted on the rear (back side) of the printer. The PCB is mounted underneath the sheet metal as shown in the picture below





10. Now, to remove the PCB, the three screws that hold the PCB to the sheet metal need to be removed, as shown in the two pictures below:


11. Once the PCB is removed, carefully unplug all the cable from the PCB. Be extra carefully while removing the bed board cable as shown in the picture below:



12. You may also want to remove the SD card from the old PCB and place it into the new PCB. The SD card is for the untethered feature of the M3D that is currently in development.













13. Now once all the cables and the old PCB is removed, do the reverse process of putting all the cables back in. The PCB and the cables are marked with labels that indicate where each cable should be plugged in to the PCB.