In this guide, we will explain how to replace the microSD card on the PCB for the M3D PRO. You will need a 2.0mm hex screwdriver for the disassembly and you’ll want to be in an antistatic 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.Raise the print head all the way at the top. 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. Remove the rear cube of the printer as shown in the picture below:
6. Now remove the screws that secure the PCB on to the sheet metal as shown below:
7. After taking out the PCB, you will be able to see the SD card, as shown in the picture below:
8.After removing the SD card, insert the card on the SD card extender as shown in the pictures below:
9.Now insert the other side of the SD card extender on the SD card slot in the PCB as shown in the picture below:
10.Install the PCB on the sheet metal and adjust the SD card extender around the sheet metal and the cube rear as shown in the picture below:
11.Install the cube fluff (upper base) and the cube rear and notice how the SD card extender is placed around them. This completes the SD card extender installation process.