Purchased in September 2021. This is the main unit only. Registration of the scanner and paper feeding during scanning are possible, but the error message "There is an abnormality in the optical system" appears, and saving is not possible. Even after charging and cleaning the reading glass surface, the issue is not resolved, so I believe the main unit is broken and requires repair. Please use it for those who can repair it or for parts. *Since this is a junk item, exchanges and returns are not accepted. Please purchase only if you understand this.