Creality Hi Mainboard Replacement

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Introduction


This guide will walk you through the process of replacing the Mainboard on Creality Hi


Important Notes

  1. Strong Yellow Glue: Many connectors on the mainboard are secured with strong yellow adhesive. You may need to carefully cut or gently loosen the glue to release the connectors. Avoid pulling or forcing them, as this can damage both the connectors and the mainboard.

    Reference photos below show how to remove the glue. 
    (Carefully use the tools when removing the glue to avoid damages to the cables and connectors)


2. Power Safety:
Before starting, ensure the machine is completely powered off and the power cable is disconnected from the printer. 


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Tools needed



2.5mm Flat Head Driver

2mm Hex Driver or Hex Key 



Spudger (for careful cable/connector handling 


Nippers (for cutting through glue if needed 


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Step 1. Remove the Bottom Panel


Using your 2mm Hex Driver, unscrew the nine screws securing the bottom panel to the chassis. Carefully remove the panel and set it aside. 



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Step 2. Disconnect the Cables on the Mainboard


Begin by loosening the 24V DC terminal block screws to release the power wires.

Next, disconnect all remaining cables connected to the mainboard.


⚠️ Note:
Most connectors are glued in place. Carefully cut or peel away the glue before unplugging. Use nippers and a flat head driver to cut or peel the glue. 


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Step 3. Unscrew the Mainboard from the Chassis


Using your 2mm Hex Driver, unscrew the four screws mounting the mainboard to the chassis.


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Step 4.  Remove and Transfer the Thermal Pad


Flip the old mainboard over and remove the thermal pad from the back. Attach this thermal pad to the same position on your new mainboard before installation. 




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Step 5.  Install the New Mainboard


Place the new mainboard in position and secure it using the four screws with your 2mm Hex Driver. 



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Step 6. Reconnect All Cable to the Mainboard


Carefully reconnect all the cables to the new mainboard, ensuring each connection is secure and fully seated.

Refer to the Wiring Diagram below if you’re unsure about cable placement. 

 

 


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Step 7. Reattach the Bottom Panel


Reinstall the bottom panel and secure it using the nine screws with your 2mm Hex Driver.



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Step 8. Power On and Calibrate


Power on the machine and run the self-test / calibration procedure. If no errors appear, the replacement was successful!



Your Mainboard Replacement is complete!


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Wiring Diagram.


  1. 24V DC IN
  2. Z1 Motor
  3. Z Motor
  4. Limit Switch Z1
  5. Limit Switch Z
  6. Y Limit Switch
  7. Wifi Antenna
  8. Screen 
  9. X Motor
  10. Y Motor
  11. Nozzle Cable
  12. RS232 Bed Communication
  13. ADC BED 
  14. RFID
  15. Bed Power 
  16. Bed to AC Cable