When to Replace:

The main board cooling fan is not working.

Disassembly:

1. Turn off the power and unplug the power cord.
2. Pull down the cover plate on the base and disconnect the two Z-axis motor terminals.

3. Use a 2.5mm wrench to unscrew the 4 foot pad fixing bolts and 5 bottom case fixing bolts, and remove the printer bottom case.

4. Disconnect the Marlin board cooling fan terminal and use a 2.0mm wrench to unscrew the fixing screws of the Marlin board cooling fan, then remove the cooling fan.

Installation:

1. Insert the Marlin board cooling fan terminal and use a 2.0mm wrench to tighten the retaining bolts of the Marlin board cooling fan.
2. Cover the bottom shell and use a 2.5mm wrench to tighten the 4 foot pad fixing bolts and 5 bottom shell fixing bolts.
3. Insert the two Z-axis motor terminals and cover the cover plate on the base.
4. Plug in the power cord and turn on the device.

If the above steps do not resolve the issue, please contact us at us.