Brother HL-3075CW User Manual page 159

Examples of poor print quality
White streaks or bands down the
page
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
Colored streaks or bands down the
page
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
Vertical streaks in a light
background
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
Recommendation
 Wipe the windows of LED head with a dry lint free soft cloth. (See Cleaning
the LED head on page 129.)
 Make sure that foreign material such as a torn piece of paper, sticky note or
dust is not inside the machine and around the drum unit and toner cartridge.
 Clean the drum unit. (See Large spots on the printed pages in Cleaning the
drum unit on page 133.)
 Identify the missing color and put in a new toner cartridge. (See Replacing the
toner cartridges on page 104.)
To identify the color of the toner cartridge, visit us at
http://solutions.brother.com/ to view our FAQs and troubleshooting tips.
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 130.)
Make sure the corona wire cleaners are at their home positions (a).

 Replace the toner cartridge that matches the color of the streak or band. (See
Replacing the toner cartridges on page 104.)
To identify the color of the toner cartridge, visit us at
http://solutions.brother.com/ to view our FAQs and troubleshooting tips.
 Put in a new drum unit. (See Replacing the drum units on page 112.)
To identify the color of the drum unit, visit us at http://solutions.brother.com/
to view our FAQs and troubleshooting tips.
 Wipe the windows of LED head with a dry lint free soft cloth. (See Cleaning
the LED head on page 129.)
Troubleshooting
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