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xBuddy and LoveBoard electronics wiring

(MK4/S, MK3.9/S)

Relevant for

MK4
MK3.9
MK4S
MK3.9S
8 comments
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The Original Prusa MK4/S and MK3.9/S are equipped with two proprietary boards: the xBuddy and the LoveBoard. The two are connected by a main cable. When replacing a part in the extruder, you will be able to do so directly on the extruder, without needing to open the extruder cable bundle or the main board.

Each connector has a label near it showing the component attached there.

LoveBoard

This connector breakout board connects all the extruder cables. In order to access the LoveBoard, slide up the cover, and unscrew the love board cover right.

xBuddy board

The xBuddy is a 32-bit board, with Trinamic drivers for silent motor operation and Wi-Fi/LAN connection.

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6 comments

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C Martin
How often does the CMOS battery need replacing?
W9HQV
What is the voltage on the hotend heater?
Yaka
What part number are the connectors on the board? My ZR connector was loose and pins bent and I want to replace it on the xbuddy board
Don Ferris
What part number are the connectors for the motors. So I can purchase replacements
Jan Kratochvíl

Hello. You can find them as connectors 502578-0400 Molex.

Luis GG
Is there a guide or schematics available on the electrical pinout of the board?