Remove the faulty metal rear panel:

Step 1 - Remove 4 Screws
Disconnect the power cord and remove 4 screws A with an H2.0 hex key.

Step 2 - Remove 10 Screws
Remove 1 screw B with an H2.0 hex key (remove the spool holder if installed) Remove 9 screws C with an H2.0 hex key

Step 3 - Remove the rear panel
Release the rear panel first from the left side (facing the rear panel) where the belt tensioner is located
Then release the rear panel from the other belt tensioner on the right side. Remove the rear panel.

Install new metal rear panel:

Step 1 - Install the rear panel

First, pass the rear panel through the filament tube bracket, and install the panel to the tensioner on the right side.

Then install the rear panel to the tensioner on the left side, and press the rear panel to install it in place at the filament tube bracket.

Step 2 - Lock in 10 screws

Lock in 9 screws C with an H2.0 hex key. Lock in 1 screw B with an H2.0 hex key (you can also install the spool holder)

Step 3 - Lock in 4 screws

Lock in 4 screws A with an H2.0 hex key.

Verify the functionality

Replacing the metal rear panel does not require functional confirmation, as long as the appearance and installation are normal.

Calibration step after the operation

For the rear panel, there is no need to perform any calibration or operation before using the printer.