Brother IntelliFax-2840 Basic User's Manual page 108

Examples of poor print quality
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
Black toner marks across the
page
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
Black lines down the page
Printed pages have toner stains
down the page.
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
White lines down the page
96
Recommendation
 If you use label sheets for laser printers, the glue from the sheets
may sometimes stick to the OPC drum surface. Clean the drum
unit. (See Advanced User's Guide: Cleaning the drum unit)
 Make sure that you use paper that meets our specifications. (See
Acceptable paper and other print media uu page 16.)
 Do not use paper that has clips or staples because they will
scratch the surface of the drum.
 If the unpacked drum unit is in direct sunlight or room light, the unit
may be damaged.
The toner cartridge may be damaged. Put in a new toner

cartridge. (See Replacing the toner cartridge uu page 55.)
 The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit uu page 62.)
 Clean the corona wire inside the drum unit by sliding the green
tab. (See Cleaning the corona wire uu page 60.)
 Make sure the green tab of the corona wire is at the home
position (a).
The drum unit may be damaged. Put in a new drum unit. (See

Replacing the drum unit uu page 62.)
 The toner cartridge may be damaged. Put in a new toner
cartridge. (See Replacing the toner cartridge uu page 55.)
 The fuser unit may be contaminated. Call Brother Customer
Service.
 The toner cartridge may be damaged. Put in a new toner
cartridge. (See Replacing the toner cartridge uu page 55.)
 The drum unit may be damaged. Put in a new drum unit. (See
Replacing the drum unit uu page 62.)
 Check if the Toner Settings of Replace Toner is Continue
(Continue mode), by pressing Menu, 1, 7. (See Advanced User's
Guide: Toner Settings.)
 Make sure that foreign material such as a torn piece of paper,
sticky notes or dust is not inside the machine and around the drum
unit and toner cartridge.