Brother HL-4050CDN - Page 167

Troubleshooting
159
7
Colored streaks or bands down the
page
 Replace the toner cartridge that matches the color of the streak or band. (See
Replacing a toner cartridge on page 96.)
 Clean all four corona wires (one for each color) inside the drum unit by sliding
the green tab. (See Cleaning the corona wires on page 125.)
 Make sure the corona wire cleaners are at their home positions (a).
 Put in a new drum unit. (See Replacing the drum unit on page 103.)
Colored lines across the page
 Replace the toner cartridge that matches the color of the line. (See Replacing
a toner cartridge on page 96.)
 Put in a new drum unit. (See Replacing the drum unit on page 103.)
White spots or hollow print
 Change the paper to freshly unpacked paper.
 Make sure that you use paper that meets our specifications. (See About
paper on page 6.)
 Make sure that the media type setting in the driver matches the type of paper
you are using. (See About paper on page 6.)
 Check the printer’s environment. Conditions such as high humidity can cause
white spots or hollow print. (See Positioning the printer on page 5.)
Completely blank or some colors
are missing
 Identify the missing color and make sure that the toner cartridge is installed
properly.
 Put in a new toner cartridge. (See Replacing a toner cartridge on page 96.)
 Put in a new drum unit. (See Replacing the drum unit on page 103.)
Examples of poor print quality Recommendation
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ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
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ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
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