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Part 3 - Assembling the board

Let's begin with the case.

  1. Remove the components from the box if not already done.

  2. Use the supplied hex key to remove the plate screws.


  3. Remove the plate from the case.

  4. If no screw was inserted into the PCB-conducting screw position out of the box, install this screw.



  5. Flip the case over.
    Install the provided rubber feet into the insets.


  6. If installing the solenoid:

    1. Prepare the PCB. Flip it upside-down, and locate the dedicated solenoid pads.


    2. Solder the provided pin headers to the PCB.
      The headers should be positioned properly so that the pins sit flush and parallel against the PCB.
      One possible way to achieve this is to install the socket onto the header, solder the header into place with the socket-header assembly pressed against the PCB, then remove the socket from the header once the solder has cooled.


    3. Tin the leads of the solenoid. Solder them to the provided pin sockets.


  7. Install the stabilizers and spacebar pipe onto the plate.  

    Make sure the spacebar pipe matches the spacebar orientation you are using.
    Make sure the stabilizer inserts are oriented the correct way; the wire clip side should be facing away from the switch cutout.

    Note: The stabilizers and spacebar pipe will not be rendered in the images below due to not having a 3D model on hand.

  8. Tune and test the switches if not already done.
    Snap the switches into the plate.


  9. Insert the PCB against the switches.


  10. Solder the switches into place, making sure that the PCB is seated firmly against the switches.
    Excessive gaps between the plate and PCB may negatively affect acoustics.

  11. At this stage, it is highly recommended to connect the PCB to a computer to test the functionality of all keys.
    Repair any faulty joints and replace any dysfunctionalnon-functional switches.

  12. If installing the solenoid:solenoids:

    1. CutAlign the providedtwo 3M VHB adhesive sheetsolenoids to coverthe solenoid bracket.
      Pay attention to the following:
       - Place the solenoids so the cables exit on the top-side.
       - The solenoids should fire inwards towards each other, with the springs on the outer side keeping the plunger away from each other unless manually pushed inwards by hand.
       - The solenoid bracket should be positioned so the U-shaped cutout is at the top, and so that the screw holes line up with the solenoids.


    2. Install the M2x3mm screws to secure the solenoids to the bracket.
      It is recommended to tighten the screws with the assembly on a flat surface to prevent the solenoids from being secured down at an angle.


    3. Remove the weight screws, then remove the weight from the case.
      Be careful during this sideprocess to avoid scratching or denting the parts - the weight installs perpendicularly to the inner case bottom surface rather than the exterior one.


    4. Install the solenoid assembly to the rear of the solenoid.


      Note that the wire exits on the side facing the viewer, and the plunger extends to the left upon powering.

    5. Peel off one side of the VHBweight, and secure it using the M2x4mm screws.



    6. Reinstall the weight into the case with the two weight screws.
      Take care to avoid damage to the solenoid.weight Peeland offcase, and make sure the othersolenoid side butcables do not adhereget tocaught anything.

    7. Insertbetween the solenoidcase into the cutout on the inside of the case, so the plunger extends to the left when powered and the wire exits on top. Insert carefully so the side with VHB does not come into contact with the case. 

    8. Align the solenoid within the cutout. Push the solenoid beam out to verify that it does indeed strike the surface when fully extended.

    9. Push the solenoid against the upper surface to fully adhere it into place.
      The solenoid should look like this once fully installed at idle, with the beam extendingparts in the directionprocess.
      of the arrow when pushed out.


      The initial solenoid installation is now complete.
  13. Place the provided O-ringsring gaskets atop the four plate mount points.



  14. If installing the solenoid: solenoids: 
    Connect the solenoidsolenoids to the PCB. 
    There is no specific ordering as to which solenoid goes to which connector, but make sure that you insert the connector in the correct orientation - forcing it in upside-down may damage the PCB.
    Once assembled, the cables should follow this general path along the case-side cutouts.


  15. Insert the switch-plate-PCB-stabilizer assembly into the case,case.
    The takingplate mount points should pass through the cutouts on the PCB.
    If you are using the solenoids, take care soto thatroute the O-ringscables - make sure they do not moveget fromcaught theirbetween positions.the case and the internals.


  16. Install the four plate screws, compressing the O-ringsplate gaskets lightly and equally.
    Do not overtighten - the internals might sit too low and bottom-out against the case.



  17. Install the keycaps.
    Test some keystrokes and verify that they are sent.

Congratulations! You have fully assembled the Lunar II.


Now you are ready for the keymap editing and final remarks.