It's crucial to power off the printer before performing any maintenance work on the printer and its electronics, including tool head wires, because leaving the printer on while conducting such tasks can cause a short circuit, which can lead to additional electronic damage and safety hazards.
When you perform maintenane or troubleshooting on the printer, you may be required to disassemble some parts, including the hotend. This process can expose wires and electrical components that could potentially short circuit if they come into contact with each other or with other metal or electronic components while the printer is still on. This can damage the electronics of the printer and cause further damage.
Therefore, it's essential to switch off the printer and disconnect it from the power source before doing any maintenance work. This will prevent any short circuits or damage to the printer's electronics. By doing so, you can avoid potential damage to the printer's electronic components and ensure that the maintenance work is performed safely and effectively.
If you have any concerns or questions about following this guide, open a new ticket in our Support Page and we will do our best to respond promptly and provide you with the assistance you need.
For easy access to the bottom section of the A1, you need to place the printer on the front. Start by flipping the screen on its side, then gently place the printer on its front, as shown in the image below. Use a box of filament to keep the top side raised to avoid putting pressure on the extruder and the screen.
¶ 2. Disconnect the wires and remove the wire bracket
Disconnect the cables of the camera, X-axis motor, and Z-axis motor;
Loosen 1 screw;
Push the cable bracket upwards, disconnect the USB data cable, and remove the cable bracket.
With the screws removed, you can now remove the heatsink bracket. Gently push the bracket upwards until it is released from the bottom plastic tab, then pull the bracket towards you to remove it
Start by gently pulling the board from the right side, towards you. While applying slight pressure, gently push on the plastic clips to the side, shown with the red arrows in the image below. The clips will release the board and you will be able to remove it.
To make the installation process easier, install the flexible ribbon cable before installing the A1 board. Make sure to align the connector as shown, to confirm a good installation.
Start by aligning the A1 mainboard to the frame, angle it as show in the image below then gently press on the board to attach it to the printer. Confirm that the plastic clips on top and on the bottom are all holding the board, then move to the next step.
In the next step, start by carefully sliding the metallic bracket behind the plastic tab, as shown in the image below. Align the screw holes with the board, then install screw 1 and 2. Finally, install screw nr. 3 to complete the bracket installation.
You can now proceed with installing the bottom cover back to the printer. Pay close attention to the motor wire in the top left side marked with the red arrow in the image below. Avoid pressing the cover in place before the wire is correctly managed The cover will clip in place, then you can proceed with installing the 10 screws while ensuring you do not over-tighten them.
¶ 8. Install the wire bracket and connect the wires
In the final step, carefully align the wire bracket then push it downwards while making sure the USB cable is fully pushed against the printer frame. Then, tighten the screw shown in the image to lock it in place. Avoid overtightening the screw as this is screwed into the plastic frame.
Next, re-connect the Camera, Motor X and Motor Z cables to finish the installation.
Note: The shorter cable on the right is the X-axis motor cable, which connects to the upper right connector; The longer cable on the right is the Z-axis motor cable, which connects to the lower right connector.
Please note that a new Mainboard will come with a new Serial Number. This means that the new board will need to be activated by Customer Support. To do so, please provide a picture of the SN displayed on the printer screen and wait for a confirmation. Please refer to this wiki: Activate New Serial Number-How to find SN. After this procedure is completed, the printer will update to the latest Serial Number, and you will be able to bind it to your account.
Check the motor wires and confirm they are installed correctly, as shown in Step 8. Install the wire bracket and connect the wires
¶ The printer cannot be connected to your Bambu Lab Account
The new board will need to be activated by Customer Support. To do so, provide the new Serial Number from the printer screen to our team, so they can activate the board. Please refer to this wiki: Activate New Serial Number-How to find SN.
