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  1. 2.5mm Allen key for M3 screws
    • 2.5mm Allen key for M3 screws

    • 2mm Allen key for nut alignment

    • Bag with fasteners for the LCD is usually taped to the LCD.

  2. For the following steps, please prepare:
    • For the following steps, please prepare:

    • LCD-cover (1x)

    • LCD-knob (1x)

    • LCD-support (2x)

    • LCD screen (1x)

    • M3x10 screw (6x)

    • M3nS nut (4x)

    • SD card (1x)

  3. Before you start, please ensure the cables are plugged in the correct order. To the slot called EXP1 (see the board) must be connected cable with ONE black stripe.
    • Before you start, please ensure the cables are plugged in the correct order.

    • To the slot called EXP1 (see the board) must be connected cable with ONE black stripe.

    • To the slot called EPX2/EXP2 (see the board) must be connected cable with TWO black stripes.

    • There is an updated version of the LCD connectors, which are now connected perpendicular (90°) to the board. Functionality remains the same. See the second picture.

    • The board (PCB) can be red or blue, their functionality is the same.

  4. Prepare the LCD controller and LCD-support printed part as shown in the picture. Slide the LCD-support parts on the LCD-controller. Repeat the steps above for the second support.
    • Prepare the LCD controller and LCD-support printed part as shown in the picture.

    • Slide the LCD-support parts on the LCD-controller.

    • Repeat the steps above for the second support.

    • Ensure the correct orientation of parts and the LCD controller.

    • The exact position will be adjusted later, no need to worry at this moment.

    • You can now remove the protective foil from the screen. Don't throw it away, we will reapply it soon.

  5. Press the LCD controller with the LCD-support into the LCD-cover as shown in the picture. Be careful, there is a control knob on the other side! Adjust the position of the supports if needed.
    • Press the LCD controller with the LCD-support into the LCD-cover as shown in the picture. Be careful, there is a control knob on the other side!

    • Adjust the position of the supports if needed.

    • Press it as deep as possible.

    • The LCD controller must click under support in the centre of the LCD-cover.

    • Reapply the protective foil on the screen, make sure foil is clean without any particles or you might scratch the screen.

  6. Using the 2.5mm Allen key and two M3x10 screws, secure the LCD controller in place. Using the 2.5mm Allen key and two M3x10 screws, secure the LCD controller in place.
    • Using the 2.5mm Allen key and two M3x10 screws, secure the LCD controller in place.

  7. Place four M3nS nuts in the prepared slots, all the way in.
    • Place four M3nS nuts in the prepared slots, all the way in.

    • Check the proper alignment with Allen key.

  8. ATTENTION!!! In case you haven't assembled the anti-vibration feet yet, the front part of the printer will be resting on the mounted  LCD. Apply the feet now or be very careful as you might damage the LCD holder. For assembly head back to Chapter 2 (Y-axis). Locate the holes for M3 screws on the front plate. Press through four M3x10 screws.
    • ATTENTION!!! In case you haven't assembled the anti-vibration feet yet, the front part of the printer will be resting on the mounted LCD. Apply the feet now or be very careful as you might damage the LCD holder. For assembly head back to Chapter 2 (Y-axis).

    • Locate the holes for M3 screws on the front plate.

    • Press through four M3x10 screws.

    • Place the LCD assembly onto the front side of the Y-axis.

    • Tighten all four screws.

  9. Assemble the LCD-knob part as shown in the picture. Knob mounting orientation doesn't matter.
    • Assemble the LCD-knob part as shown in the picture.

    • Knob mounting orientation doesn't matter.

  10. Compared to the previous chapter, this was extremely easy, right? Have 10 %, not more.
    • Compared to the previous chapter, this was extremely easy, right? Have 10 %, not more.

  11. That was fast! Wasn't it?
    • That was fast! Wasn't it?

    • Check the final look, compare it to the picture.

    • You can now remove the protective foil from the LCD panel.

    • You can slide the SD card in (from the left side). However, it is recommended to wait till the printer is completed.

  12. There are two types of the PSU with different mounting points. Make sure you select the correct chapter!!!
Finish Line

1057 other people completed this guide.

Jakub Dolezal

Member since: 02/20/2017

225 Guides authored

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Prusa Research Member of Prusa Research

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367 Guides authored

5 Comments

Good thing for the spare bag. My LCD had no hardware with it.

Anthony Wittler - Reply

My wife thinks that the knob should be a different color than the LCD cover maybe green with orange.

Ronald Lake - Reply

Well there’s nothing easier than to print it again in those colors :)

Martin L. - Official Prusa CS -

My top cover snapped. It appears that the cables (or connectors) are higher up and lifting the cover off the Build plate surface.. so the plastic beneath the screw that attaches the cover to the bed has snapped.

Wycliffe Raduma - Reply

Hello Wycliffe, the LCD cables have to be guided below the frame, to not interfere with the heatbed.

Martin L. - Official Prusa CS -

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