Bambu Lab Toolhead Board – A1 Series (FAE009)

Original replacement toolhead board (TH Board) designed for Bambu Lab A1 Series (A1 and A1 mini) 3D printers. This is the main control board in the print head, which ensures communication between the printer electronics and all toolhead components – from the hotend heating assembly to the filament sensor. This board is an ideal replacement part in case of:

• error messages like "Toolhead malfunction",
• damage or burnout of the original toolhead board,
• problems after replacing the hotend or toolhead cable,
• mechanical or thermal damage to the electronics in the print head.

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Key Features

• Original Bambu Lab part – full compatibility and reliability with A1 and A1 mini printers.
• Main print head control board – connects the hotend heating assembly, extruder, hotend cooling fan, filament sensor, and other toolhead elements.
• Stable and precise communication – ensures proper temperature regulation, filament dosing, and real-time sensor reading.
• Replacement for damaged electronics – suitable for electrical shorts, surges, damaged connectors, or consequences of mechanical failure.
• Compatible with A1 Series – designed for Bambu Lab A1 and A1 mini (A1 Series with toolhead cable via USB‑C).

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Product Description

Bambu Lab Toolhead Board – A1 Series (FAE009) is a printed circuit board (PCB) located in the print head, serving as a central hub for:

• connection and control of the hotend heating assembly,
• control of the extruder unit,
• powering and controlling the hotend cooling fan, and potentially other fans in the head,
• reading data from the filament sensor,
• data communication with the rest of the printer via the toolhead cable (USB‑C).

In cases of faults where the A1/A1 mini printer reports toolhead errors, filament sensor reading problems, or anomalies in heating and extruder control, replacing this board is the recommended solution.

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Compatibility

• Bambu Lab A1 Series:
  • Bambu Lab A1
  • Bambu Lab A1 mini

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Package Contents

Content may vary slightly by production series, but typically includes:

• 1× Toolhead Board (TH Board) – A1 Series
• 4× mounting screws (M2-2) for securing the board in the toolhead

In some sets, the following may also be included:

• 1× BT2x5 screw
• 1× adhesive tape (for securing wiring or insulation)
• 1× foam insert (protection and vibration damping)

We always recommend checking the current package contents in the manual or on the packaging label.

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Installation and Use

• Before installation, turn off the printer and disconnect it from the power supply.
• Remove the toolhead cover according to the Bambu Lab service manual.
• Disconnect the original toolhead board from all connectors and cables (hotend, extruder, fans, filament sensor, toolhead cable).
• Install the new Toolhead Board – A1 Series (FAE009) using the provided screws.
• Carefully plug all connectors into the correct positions according to the manufacturer's diagram.
• After reassembling, perform a test print and any calibration routines in the Bambu Lab software.

For users without electronics experience, we recommend entrusting the replacement to an authorized service center or following the official instructions exactly.

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Technical Specifications

Parameter	Value
Manufacturer Designation	FAE009
Product Type	Toolhead Board / TH Board (PCB)
Purpose	Main print head board (toolhead)
Compatible Printers	Bambu Lab A1, Bambu Lab A1 mini
Brand	Bambu Lab
Category	Mainboards & printed circuit boards
PCB Material	PCBA (assembled printed circuit board)
Typical Packaging Dimensions	approx. 105 × 54 × 33 mm
Typical Packaging Weight	approx. 40 g (including packaging)
Package Contents	1× TH Board, mounting screws

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Who is the product suitable for

This replacement part is intended for:

• Bambu Lab A1 / A1 mini owners resolving toolhead failures or error messages related to electronics in the print head.
• Service technicians and operators of multiple printers who want to have key spare parts in stock to minimize downtime.
• Customers who, after mechanical damage to the print head, surge, or toolhead cable error, need a complete replacement of the control board in the head.

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Advantages of buying from a specialized 3D shop

• We supply original Bambu Lab parts with verified compatibility.
• Fast delivery and professional support in the field of 3D printing.
• Option to purchase related spare parts – hotend heating assembly, toolhead cable, fans, sensors, etc., for a complete repair of the A1 Series printer.

Key Features:

• Original replacement toolhead board (TH Board) for Bambu Lab A1 Series (A1 and A1 mini)
• Ensures connection of the hotend, extruder, cooling fans, and filament sensor in the print head
• Control electronics responsible for proper functioning and communication of the toolhead with the printer
• Suitable solution for error messages like "Toolhead malfunction" or damage to the original board
• Supplied as a complete assembled printed circuit board ready for installation
• Verified quality and compatibility thanks to the original part from Bambu Lab