Brother MFC 7860DW - Manual (Page 119)

Troubleshooting
103
B
Poor fixing
 Open the back cover and make sure that the two green envelope
levers on the left and right hand sides are in the up position.
 Choose Improve Toner Fixing mode in the printer driver. (See
Other Print Options (for Windows
® ) or Print Settings (For
Macintosh) in the Software User’s Guide.)
If this selection does not provide enough improvement, select
Thicker Paper in Media Type settings.
Examples of poor print quality Recommendation
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.