Brother MFC-9125CN User Manual page 153

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 all four LED heads with a dry lint free soft cloth.
(See Cleaning the LED heads on page 159.)
 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 all four drum units. (See Cleaning the drum unit on page 162.)
 Identify the missing color and put in a new toner cartridge. (See
Replacing a Toner cartridge on page 171.)
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 160.)
 Make sure the corona wire cleaners are at their home positions (a).
Clean the scanner glass and scanner glass strip. (See Cleaning the

scanner on page 158.)
 Replace the toner cartridge that matches the color of the streak or
band. (See Replacing a Toner cartridge on page 171.)
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 177.)
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 all four LED heads with a dry lint free soft cloth.
(See Cleaning the LED heads on page 159.)
Troubleshooting and routine maintenance
C
137