Brother DCP-9020CDW Basic User's Manual page 118

Examples of poor print quality
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
Coloured streaks or bands down
the page
110
Recommendation

Wipe the windows of all four LED heads with a dry lint free
soft cloth (see Cleaning the LED heads on page 71).

Wipe the scanner glass strip with a dry lint free soft cloth
(see Cleaning the scanner glass on page 72).

Clean all four corona wires (one for each colour) inside the
drum unit by sliding the green tab (see Cleaning the corona
wires on page 73).

Make sure the green tab of the corona wire is at the home
position (a)(1).

Replace the toner cartridge that matches the colour of the
streak or band (see Replacing the toner cartridges
on page 48).
To identify the colour of the toner cartridge, visit us at
http://solutions.brother.com/ to view our FAQs and
troubleshooting tips.

The drum unit may be damaged. Install a new drum unit (see
Replacing the drum units on page 55.)
To identify the colour of the drum unit, visit us at
http://solutions.brother.com/ to view our FAQs and
troubleshooting tips.
1