Use a Phillips screwdriver to loosen the 5 screws securing the front cover of the fan shroud. Remove the front cover of the fan shroud and the filter.
Use a 2.0 mm Allen wrench to loosen the 12 screws securing the back cover of the printer, then remove the back cover. (Screw holes labeled by the red circle are M3*4, while screw holes labeled by the yellow circle are M3*8.)
Use a Phillips screwdriver to loosen the 4 screws securing the chamber cooling fan and unplug the ribbon cables of the chamber cooling fan.
Organize the ribbon cables, then remove the old chamber cooling fan.
Prepare the new chamber cooling fan. Put it in the installation position by aligning it with the screw holes.
Oragnize the ribbon cables of the chamber cooling fan ribbon cables and insert the ribbon cables into the adapter board port.
Use a Phillips screwdriver to tighten the 4 screws securing the chamber cooling fan.
Put the back cover of the printer in the installation position by aligning it with the screw holes. Use a 2.0 mm Allen wrench to tighten the 12 screws securing the back cover of the printer. (Screw holes labeled by the red circle are M3*4, while screw holes labeled by the yellow circle are M3*8.)
Put the filter in the installation position.
Put the front cover of the fan shroud in the installation position by aligning it with the screw holes. Use a Phillips screwdriver to tighten the 5 screws securing the front cover of the fan shroud.
Power on the printer. Touch "Function - Fan" on the touchscreen. Open the chamber cooling fan. The printer can be used as usual after the fan rotates normally.