Brother MFC MFC-7840W User Manual

102
Curled or wavy
 Check the paper type and quality. High temperatures and high
humidity will cause paper to curl.
 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.
White Spots on black text
and graphics at 2.95 in.
(75 mm) intervals
Black Spots at 2.95 in.
(75 mm) intervals
 Make ten copies of a blank, white sheet of paper. (See Making
multiple copies on page 70.) If the problem is not solved, the drum
unit may have glue from a label stuck on the OPC drum surface.
Clean the drum unit. (See Cleaning the drum unit on page 123.)
 The drum unit may be damaged. Put in a new drum. (See Replacing
the drum unit on page 130.)
Examples of poor print
quality
Recommendation
(75 mm)
2.95 in.
(75 mm)
2.95 in.
(75 mm)
2.95 in.
(75 mm)
2.95 in.

Brother MFC MFC-7840W Specifications

General

Print Technology	Laser
Print Resolution	Up to 2400 x 600 dpi
Paper Capacity	250 sheets
ADF Capacity	35 sheets
Scan Resolution	Up to 19200 x 19200 dpi (interpolated)
Fax Modem Speed	33.6 Kbps
Functions	Print, Copy, Scan, Fax
Maximum Copying Resolution	600 x 600 dpi
Optical Scan Resolution	600 x 2400 dpi
Wireless	Yes
Copy Resolution	600 x 600 dpi
Fax Transmission Speed	33.6 Kbps
Display	LCD
Weight	25.6 lbs
Connectivity	USB, Wireless
Scanner Type	Flatbed
Connectivity Technology	Wireless, USB
Printer Type	All-in-One
Scan Type	Flatbed, ADF