Brother HL-7050 Series User Manual page 177

Paper may jam in the paper tray, inside the printer, in the face-up
output tray or where the paper comes out of the printer. Check where
the jam is and follow the instructions below to remove the jammed
paper.
If the error message still appears on the LCD after you remove the
jammed paper, there may be more paper jammed somewhere else.
Please check the printer thoroughly.
After you have removed all the jammed paper, open the top cover
and then close it again to start printing.
If the paper is misfeeding or a lot of pages are going through
at the same time when you print on small or thick paper,
change the paper thickness switches that are on the bottom
of the paper tray as follows.
Other (Default setting)
A6
A4 100 g/m
Letter 105 g/m
Legal 105 g/m
Executive, A5, B6
Do not use the following:
Bent paper
Moist paper
Paper that does not meet specifications
6 - 9 TROUBLESHOOTING
Switch 1:ON
Switch 2:OFF
Switch 1:OFF
Switch 2:OFF
2
(27 lbs) Switch 1:ON
2
(28 lbs) Switch 2:ON
2
(28 lbs)
Switch 1:OFF
Switch 2:ON
Figure 6-2