{"product_id":"mainboard-for-bambu-a1","title":"Mainboard for Bambu A1","description":"\u003ch3\u003eMainboard Replacement Guide - A1\u003c\/h3\u003e\n\u003cp\u003eThis guide shows how to replace the Main Controller Board on the A1\u003c\/p\u003e\n\u003cp\u003eIn this guide we will show the process of replacing the \u003cbr\u003eMainboard on the A1.\u003c\/p\u003e\n\u003ch3\u003eWhen to use?\u003c\/h3\u003e\n\u003cp\u003eThis guide should be used if the Mainboard of the A1 is faulty, and needs to be replaced.\u003c\/p\u003e\n\u003ch3\u003eCommon issues that are caused by the A1 Mainboard are:\u003c\/h3\u003e\n\u003cp\u003ePrinter is not turning on\u003c\/p\u003e\n\u003cp\u003eThe Mainboard is damaged\u003c\/p\u003e\n\u003cp\u003eRecommended by Bambu Lab Customer Support\u003c\/p\u003e\n\u003cp\u003eTools and materials needed\u003c\/p\u003e\n\u003ch3\u003eBambu Lab Mainboard (Main Controller Board) for A1\u003c\/h3\u003e\n\u003cp\u003eH2.0 Allen key\u003c\/p\u003e\n\u003cp\u003eH1.5 Allen key\u003c\/p\u003e\n\u003cp\u003ePH2 Phillips screwdriver\u003c\/p\u003e\n\u003cp\u003eEstimated completion time: 20 minutes\u003c\/p\u003e\n\u003ch3\u003eSafety Warning\u003c\/h3\u003e\n\u003ch3\u003eIMPORTANT!\u003c\/h3\u003e\n\u003cp\u003eIt'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 electrical damage and safety hazards.\u003c\/p\u003e\n\u003cp\u003eWhen you perform maintenance 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 electrical components while the printer is still on. This can damage the electronics of the printer and cause further damage.\u003c\/p\u003e\n\u003cp\u003eTherefore, 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.\u003c\/p\u003e\n\u003ch3\u003eSteps to remove the old Mainboard\u003c\/h3\u003e\n\u003ch3\u003e1. Place the printer on its front\u003c\/h3\u003e\n\u003cp\u003eFor easy access to the bottom section of the A1, you need to place the printer on the front.\u003c\/p\u003e\n\u003cp\u003eStart by flipping the screen on its side, then gently place the printer on its front, as shown in the image below. \u003c\/p\u003e\n\u003cp\u003eUse a box of filament to keep the top side raised to avoid putting pressure on the extruder and the screen.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/wiki.bambulab.com\/a1\/maintenance\/power-supply\/place_the_a1_printer_on_its_front.jpeg\" alt=\"place_the_a1_printer_on_its_front.jpeg\"\u003e\u003c\/p\u003e\n\u003ch3\u003e2. Disconnect the wires and remove the wire bracket\u003c\/h3\u003e\n\u003cp\u003e1.Disconnect the cables of the camera, X-axis motor, and Z-axis motor;\u003c\/p\u003e\n\u003cp\u003e2.Loosen 1 screw;\u003c\/p\u003e\n\u003cp\u003e3.Push the cable bracket upwards, disconnect the USB data cable, and remove the cable bracket.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0759\/4531\/2569\/files\/ScreenShot_2026-07-06_104302_763.png?v=1783305822\"\u003e\u003c\/p\u003e\n\u003ch3\u003e3. Remove the printer's bottom cover\u003c\/h3\u003e\n\u003cp\u003eRemove the 10 screws marked in red to remove the bottom cover.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/wiki.bambulab.com\/a1\/maintenance\/wifi-antenna\/%E6%8B%86%E5%BA%95%E5%A3%B3%E8%9E%BA%E4%B8%9D10.jpg\" alt=\"拆底壳螺丝10.jpg\"\u003e\u003c\/p\u003e\n\u003ch3\u003e4. Remove the MicroSD Card\u003c\/h3\u003e\n\u003cp\u003eBefore moving to the next step, remove the Micro SD card from the printer.\u003c\/p\u003e\n\u003ch3\u003e5. Disconnect the five cables from the board\u003c\/h3\u003e\n\u003cp\u003eCarefully disconnect the five cables shown in the image below.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/wiki.bambulab.com\/a1\/manual\/replace-mainboard\/remove_mainboard_cables_from_a1_board.jpeg\" alt=\"remove_mainboard_cables_from_a1_board.jpeg\"\u003e\u003c\/p\u003e\n\u003ch3\u003e6. Remove the mainboard screws\u003c\/h3\u003e\n\u003cp\u003eCarefully remove all the 9 screws shown in the image below.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/wiki.bambulab.com\/a1\/manual\/replace-mainboard\/remove_the_a1_board_screws.jpeg\"\u003e\u003c\/p\u003e\n\u003ch3\u003e7. Remove the heatsink bracket\u003c\/h3\u003e\n\u003cp\u003eWith the screws removed, you can now remove the heatsink bracket.\u003c\/p\u003e\n\u003cp\u003eGently push the bracket upwards until it is released from the bottom plastic tab, then pull the bracket towards you to remove it.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/wiki.bambulab.com\/a1\/manual\/replace-mainboard\/remove_the_heatsink_bracket.jpeg\" alt=\"remove_the_heatsink_bracket.jpeg\"\u003e\u003c\/p\u003e\n\u003ch3\u003e8. Remove the board\u003c\/h3\u003e\n\u003cp\u003eThe board is now ready to be removed.\u003c\/p\u003e\n\u003cp\u003eStart 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.\u003c\/p\u003e\n\u003cp\u003eThe clips will release the board and you will be able to remove it.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/wiki.bambulab.com\/a1\/manual\/replace-mainboard\/remove_the_board_clips.jpeg\" alt=\"remove_the_board_clips.jpeg\"\u003e\u003c\/p\u003e\n\u003ch3\u003e9. Disconnect the board wires\u003c\/h3\u003e\n\u003cp\u003ePartially unscrew the screws holding the wires in place, then carefully disconnect the wires from the power supply.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"disconnect_the_board_wires.jpeg\" src=\"https:\/\/wiki.bambulab.com\/a1\/manual\/replace-mainboard\/disconnect_the_board_wires.jpeg\"\u003e\u003c\/p\u003e\n\u003ch3\u003eThe board is now completely removed.\u003c\/h3\u003e\n\u003cp\u003e\u003cimg alt=\"remove_the_boadrd_completely.jpg\" src=\"https:\/\/wiki.bambulab.com\/a1\/manual\/replace-mainboard\/remove_the_boadrd_completely.jpg\"\u003e\u003c\/p\u003e\n\u003ch3\u003eSteps to install the new Mainboard\u003c\/h3\u003e\n\u003cp\u003eBefore you start the procedure, please take a picture of the QR code located on the back side of the board. You will need it after the replacement is completed.\u003c\/p\u003e\n\u003cp\u003eThe content of this QR code is the complete machine SN serial number, which is used to register the device after replacing the mainboard.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"screenshot-20240926-191519.png\" src=\"https:\/\/wiki.bambulab.com\/general\/find-sn\/screenshot-20240926-191519.png\"\u003e\u003c\/p\u003e\n\u003ch3\u003e1. Confirm Mainboard Batch\u003c\/h3\u003e\n\u003cp\u003eThe latest batch of mainboards has changed the component layout, which may interfere with the printer base. You can determine the new mainboard batch based on the component orientation shown in the image below.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0759\/4531\/2569\/files\/ScreenShot_2026-07-06_111657_825.png?v=1783307842\"\u003e\u003c\/p\u003e\n\u003cp\u003eIf you have received a new batch mainboard, first check the bottom shell.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"pixpin_2026-06-18_10-32-53.jpg\" src=\"https:\/\/wiki.bambulab.com\/a1\/maintenance\/mainboard-replacement-guide\/pixpin_2026-06-18_10-32-53.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003eObserve whether the ribs on the part of the bottom shell where the cable management box is installed have been processed.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"pixpin_2026-06-18_10-33-11.jpg\" src=\"https:\/\/wiki.bambulab.com\/a1\/maintenance\/mainboard-replacement-guide\/pixpin_2026-06-18_10-33-11.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003eIf not processed, you can refer to the image below to cut the corresponding location.\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0759\/4531\/2569\/files\/ScreenShot_2026-07-06_112128_958.png?v=1783308126\" alt=\"\"\u003e\u003c\/p\u003e\n\u003ch3\u003e2. Re-connect the Mainboard wires to the power supply\u003c\/h3\u003e\n\u003cp\u003eCarefully re-connect the wires of the board to the power supply.\u003c\/p\u003e\n\u003cp\u003e1. Red wire - Positive\u003c\/p\u003e\n\u003cp\u003e2. Black wire - Negative\u003c\/p\u003e\n\u003cp\u003e3. Longer black wire - Neutral\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"disconnect_the_board_wires.jpeg\" src=\"https:\/\/wiki.bambulab.com\/a1\/manual\/replace-mainboard\/disconnect_the_board_wires.jpeg\"\u003e\u003c\/p\u003e\n\u003ch3\u003e3. Install the flat ribbon cable\u003c\/h3\u003e\n\u003cp\u003eTo make the installation process easier, install the flexible ribbon cable before installing the A1 board.\u003c\/p\u003e\n\u003cp\u003eMake sure to align the connector as shown, to confirm a good installation.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/wiki.bambulab.com\/a1\/manual\/replace-mainboard\/install_ribbon_cable.jpeg\" alt=\"install_ribbon_cable.jpeg\"\u003e\u003c\/p\u003e\n\u003ch3\u003e4. Attach the new board to the printer\u003c\/h3\u003e\n\u003cp\u003eStart 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.\u003c\/p\u003e\n\u003cp\u003eConfirm that the plastic clips on top and on the bottom are all holding the board, then move to the next step. \u003c\/p\u003e\n\u003cp\u003eApply the blue thermal paste to the contact areas between the mainboard and the heatsink to ensure optimal thermal conductivity.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/wiki.bambulab.com\/a1\/manual\/replace-mainboard\/install_new_board_with_silicone.png\" alt=\"install_new_board_with_silicone.png\"\u003e\u003c\/p\u003e\n\u003ch3\u003e5. Install the board heatsink\u003c\/h3\u003e\n\u003cp\u003eIn the next step, start by carefully sliding the metallic bracket behind the plastic tab, as shown in the image below. \u003c\/p\u003e\n\u003cp\u003eAlign the screw holes with the board, then install screw 1 and 2. \u003c\/p\u003e\n\u003cp\u003eFinally, install screw nr. 3 to complete the bracket installation.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/wiki.bambulab.com\/a1\/manual\/replace-mainboard\/install_the_board_heatsink.jpeg\" alt=\"install_the_board_heatsink.jpeg\"\u003e\u003c\/p\u003e\n\u003ch3\u003e6. Re-install the screws to the board\u003c\/h3\u003e\n\u003cp\u003eSecure the board in place using the remaining 6 screws, as shown in the image below.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/wiki.bambulab.com\/a1\/manual\/replace-mainboard\/install_the_remaining_board_screws.jpeg\" alt=\"install_the_remaining_board_screws.jpeg\"\u003e\u003c\/p\u003e\n\u003ch3\u003e7. Re-attach the board wires\u003c\/h3\u003e\n\u003cp\u003eComplete the board installation by re-attaching the wires as shown in the image below.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/wiki.bambulab.com\/a1\/manual\/replace-mainboard\/remove_mainboard_cables_from_a1_board.jpeg\" alt=\"remove_mainboard_cables_from_a1_board.jpeg\"\u003e\u003c\/p\u003e\n\u003cp\u003eNote: The diagrams of each interface are as follows:\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"主板接口en.jpg\" src=\"https:\/\/wiki.bambulab.com\/a1\/manual\/replace-mainboard\/%E4%B8%BB%E6%9D%BF%E6%8E%A5%E5%8F%A3en.jpg\"\u003e\u003c\/p\u003e\n\u003ch3\u003eCheck the indicator lights on the control board\u003c\/h3\u003e\n\u003cp\u003eSince both the MC board and AP board of the A1 model are integrated into the mainboard, their functional status can be verified through light signals.\u003c\/p\u003e\n\u003cp\u003eBefore tightening all screws, you may temporarily install or leave the cover off (be cautious of electrical safety and operate with the power disconnected). Then power on to check whether the indicator lights are functioning normally. If the lights are normal, fasten the screws to avoid rework.\u003c\/p\u003e\n\u003cp\u003eNormal State: The MC board flashes green once every 5 seconds\u003c\/p\u003e\n\u003cp\u003eNormal State: The AP board has 1 green indicator light that flashes once per second\u003c\/p\u003e\n\u003ch3\u003e8. Install the printer's bottom cover\u003c\/h3\u003e\n\u003cp\u003eYou 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.\u003c\/p\u003e\n\u003cp\u003eThe cover will clip in place, then you can proceed with installing the 10 screws while ensuring you do not over-tighten them.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"安装底盖.jpg\" src=\"https:\/\/wiki.bambulab.com\/a1\/maintenance\/wifi-antenna\/%E5%AE%89%E8%A3%85%E5%BA%95%E7%9B%96.jpg\"\u003e\u003c\/p\u003e\n\u003ch3\u003e9. Install the wire bracket and connect the wires\u003c\/h3\u003e\n\u003cp\u003eIn 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.\u003c\/p\u003e\n\u003cp\u003eThen, tighten the screw shown in the image to lock it in place. Avoid overtightening the screw as this is screwed into the plastic frame.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"安装支架.jpg\" src=\"https:\/\/wiki.bambulab.com\/a1\/maintenance\/wifi-antenna\/%E5%AE%89%E8%A3%85%E6%94%AF%E6%9E%B6.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003eNext, re-connect the Camera, Motor X and Motor Z cables to finish the installation.\u003c\/p\u003e\n\u003cp\u003eNote: 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.\u003c\/p\u003e\n\u003cp\u003e\u003cimg src=\"https:\/\/wiki.bambulab.com\/a1\/maintenance\/wifi-antenna\/%E6%8E%A5%E7%BA%BF%E7%BC%86.jpg\" alt=\"接线缆.jpg\"\u003e\u003c\/p\u003e\n\u003cp\u003eThis completes the installation process.\u003c\/p\u003e\n\u003ch3\u003eImportant Note:\u003c\/h3\u003e\n\u003cp\u003eOnce the new serial number (SN) is successfully registered, the old SN will be invalidated, and the old mainboard can no longer be registered or bound.\u003c\/p\u003e\n\u003cp\u003eFor machines that have had the Mainboard replaced, as the new SN is not registered, binding cannot be performed. We recommend skipping the binding process during the initial startup to test if the replacement fixed the problem (unless you are troubleshooting network issues). After confirming the machine is working correctly, you can register the new serial number (SN) by logging into the Bambu Lab official website.\u003c\/p\u003e\n\u003cp\u003e\u003cimg alt=\"register_sn_en.jpg\" src=\"https:\/\/wiki.bambulab.com\/x2d\/maintenance\/ap-board\/register_sn_en.jpg\"\u003e\u003c\/p\u003e\n\u003ch3\u003eVerify the functionality\u003c\/h3\u003e\n\u003cp\u003eAfter the SN has been registered, bind the printer to your account.\u003c\/p\u003e\n\u003cp\u003eTo ensure everything works as expected, turn on the printer and try using it.\u003c\/p\u003e\n\u003cp\u003eIf the printer works as expected, the installation is completed successfully.\u003c\/p\u003e\n\u003ch3\u003eCalibration step after the operation\u003c\/h3\u003e\n\u003cp\u003eA full calibration is required after the Main Controller Board replacement procedure.\u003c\/p\u003e\n\u003ch3\u003ePotential problems and solutions\u003c\/h3\u003e\n\u003cp\u003eIf you encounter problems during the installation of a new Motherboard, please check the potential problems and \u003cbr\u003esolutions listed below:\u003c\/p\u003e\n\u003ch3\u003eThe printer doesn't power on\u003c\/h3\u003e\n\u003cp\u003eConfirm the Motherboard power wires are installed correctly, as shown in Step 1. Re-connect the Mainboard wires to the power supply\u003c\/p\u003e\n\u003ch3\u003eOne of the axis is not working\u003c\/h3\u003e\n\u003cp\u003eCheck the motor wires and confirm they are installed correctly, as shown in Step 8. Install the wire bracket and connect the wires\u003c\/p\u003e","brand":"Bambu Lab","offers":[{"title":"Default Title","offer_id":53727233245497,"sku":null,"price":79.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0759\/4531\/2569\/files\/MainboardforBambu-A1.jpg?v=1783318496","url":"https:\/\/p3d.mx\/products\/mainboard-for-bambu-a1","provider":"P3D","version":"1.0","type":"link"}