Steps for the Operations
Step 1: Unload the filament from the printer (for standalone printer)
Method 1: Unload the filament by operating the printer (when the printer is powered on)
1. Click "Filament" on the printer screen, and select the filament slot you want to unload
2. Click the "Unload" button set up the unloading process and wait for about 3 minutes to finish.
Method 2: Cut the filament with the filament cutter and unload the filament manually (when the printer is powered off)

Step 2: Power off, and remove the filament hub assembly
1. Press the switch button to power off the printer and disconnect the power cable. (skip if you take Method 2 in Step 1)
2. Use a wrench to delicately pry off the Filament Hub Cap, then remove the Filament Hub Assembly and the corresponding spring from the top.

Step 3: Remove the Filament Sensor and Replace the Feeding Bracket
1.Use an H2.0 hex key to unscrew two screws and pull up the filament sensor base
2. Use an H1.5 hex key wrench to unscrew two screws, disconnect the Filament Sensor and replace the filament sensor base