Hidden microSD Slot Access - OpenNeptune3D/OpenNept4une GitHub Wiki

microSD Slot Location

Early N4 & N4 Pro models had an externally accessible microSD slot (shown below)

  • This slot is used for Klipper MCU firmware updates. It can't be used for .gcode file transfers

Later N4, N4 Pro & Plus/Max still have the slot although It's not readily accessible

Common Steps for All Models

  • Remove the front 4 stainless bolts with a 3mm Hex key

  • Remove all the silver screws securing the mainboard access panel underneath the printer (if not already removed)

  • Disconnect the panel-mounted cooling fan, either from the mainboard or from the connector on the fan's wire.

  • Continue the guide in the relevant sections below

Neptune 4 & Neptune 4 Pro (Only)

  • Remove all 4 screws that secure the mainboard
  • Remove any cable management screws restricting the movement of the mainboard
  • Lift the mainboard slightly to reveal the last two screws
  • Please make a note of the connection locations if you choose to disconnect any cables.

You now have two options:

  1. Cut a slot in your front panel using the dimensions provided at the top of this page.
  2. Reattach the mainboard without replacing the last two screws you removed.
    Future access will be gained by removing only four stainless screws located at the front of the printer.

Neptune 4 Plus

  • Remove both black screws displayed below

You now have three options:

  1. Cut a slot in your front panel using the dimensions provided at the top of this page.
  2. Print this handy I/O panel (this is also Required) Credit: nocci
  3. Leave the last two screws removed.
    Future access will be gained by removing only four stainless screws located at the front of the printer.

Neptune 4 Max

  • Remove all screws shown below

Now, you have two options;

  1. Print this handy I/O panel Credit: mdburkey

  2. Cut a slot in your front panel to facilitate easier access in the future. Refer to the dimensions provided at the top of the page for guidance.

Credits:

NoviceEngineer
sdgxdszg
nocci
mdburkey