Use the Scroll down arrow on the right of the printer's panel. On the second page click on ADMINISTRATION menu.
Click DEFAULT JOB OPTIONS
Select DEFAULT OPTIONS FOR ORIGINALS
Arrow down 4 times
Click on OPTIMIZE TEXT PICTURE
Select TEXT
Click Save
Back button
Select IMAGE ADJUSTMENT
IN option DARKNESS #2 SETTING
Click Save
In option Backgroung Cleanup #2 setting
Click save
In option SHARPNESS #2 Setting
Click save.