You can delete the printer's internal memory data, such as downloaded fonts and macro print jobs.
You can also perform this function from the printer’s control panel.
Settings > General Settings > System Administration > Clear Internal Memory Data > PDL Font, Macro, and Working Area
On a computer connected to the same network as the printer, open a browser and enter the printer's IP address.
You can check the printer's IP address using the following menu.
Enter the administrator password to log in as an administrator.
Select the following menu.
Device Management tab > Clear Internal Memory Data
Click Delete for PDL Font, Macro, and Working Area.