Brother Copier/Printer MFC-9970CDW - Manual (Page 152)

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Poor fixing  Make sure that the media type settings in the printer driver and in the
machine's Paper Type menu matches the type of paper you are
using. (See Acceptable paper and other print media on page 21 and
Basic tab in the Software User's Guide.)
 Make sure that the two gray levers inside the back cover are in the up
position.
 Choose Improve Toner Fixing mode in the printer driver. (See Other
Print Options (For Windows
®
printer driver), Advanced options (For
Windows
®
BR-Script printer driver), Print Settings (For Macintosh
printer driver) or Printer Features (For Macintosh BR-Script printer
driver) in the Software User's Guide.)
If this selection does not provide enough improvement, change the
printer driver setting in Media Type to a thick setting.
Curled or wavy  Choose Reduce Paper Curl mode in the printer driver when you do
not use our recommended paper. (See Other Print Options (For
Windows
®
printer driver), Advanced options (For Windows
®
BR-Script printer driver), Print Settings (For Macintosh printer driver)
or Printer Features (For Macintosh BR-Script printer driver) in the
Software User's Guide.)
 If you do not use the machine often, the paper may have been in the
paper tray too long. Turn over the stack of paper in the paper tray.
Also, fan the paper stack and then rotate the paper 180
° in the paper
tray.
 Store the paper where it will not be exposed to avoid high
temperatures and high humidity.
 Open the back cover (face up output tray) to let the printed paper out
on the face up output tray.
Examples of poor print
quality Recommendation
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.