Brother International HL-5440D Basic User's Guide - English - Page 150

Black toner marks across the, Black Spots at 3.7 in. 94 mm

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Troubleshooting Examples of poor print quality Recommendation  If the problem is not solved after printing a few pages, the drum unit may have foreign material, such as glue from a label, stuck on the drum. Clean the drum unit. uu Cleaning the drum unit uu page 113  The drum unit may be damaged. Put in a new drum unit. uu Replacing the drum unit uu page 104 White Spots on black text and graphics at 3.7 in. (94 mm) intervals 6 Black Spots at 3.7 in. (94 mm) intervals ABCDEFGH abcdefghijk ABCD abcde 01234 Black toner marks across the page  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. uu Cleaning the drum unit uu page 113  Make sure that you use paper that meets our specifications. uu Acceptable paper and other print media uu page 2  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. uu Replacing the toner cartridge uu page 96  The drum unit may be damaged. Put in a new drum unit. uu Replacing the drum unit uu page 104 144

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144
Troubleshooting
6
White Spots on black text and
graphics at
3.7 in. (94 mm)
intervals
Black Spots at 3.7 in. (94 mm)
intervals
If the problem is not solved after printing a few pages, the drum unit may have
foreign material, such as glue from a label, stuck on the drum. Clean the drum
unit.
uu
Cleaning the drum unit
uu
page 113
The drum unit may be damaged. Put in a new drum unit.
uu
Replacing the drum unit
uu
page 104
Black toner marks across the
page
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.
uu
Cleaning the drum unit
uu
page 113
Make sure that you use paper that meets our specifications.
uu
Acceptable paper and other print media
uu
page 2
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.
uu
Replacing the toner cartridge
uu
page 96
The drum unit may be damaged. Put in a new drum unit.
uu
Replacing the drum unit
uu
page 104
Examples of poor print quality
Recommendation
ABCDEFGH
abcdefghijk
ABCD
abcde
01234