Brother HL-3140CW User Manual page 184

Troubleshooting
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 lines across the page
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
White spots or hollow print
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
Blank page or some colours are
missing
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
94 mm
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
94 mm
Coloured spots at 94mm
Recommendation
 Identify the colour causing the problem and replace the toner cartridge that
matches the colour of the line (see Replacing the toner cartridges
on page 110).
To identify the colour of the toner cartridge, visit us at
http://solutions.brother.com/ to view our FAQs and troubleshooting tips.
 Identify the colour causing the problem and put in a new drum unit (see
Replacing the drum units on page 120).
To identify the colour of the drum unit, visit us at http://solutions.brother.com/
to view our FAQs and troubleshooting tips.
 Make sure that the media type setting in the driver matches the type of paper
you are using (see Acceptable paper and other print media on page 2).
 Check the machine's environment. Conditions such as high humidity can
cause hollow print.
(See Product Safety Guide: Choose a safe location for your product.)
If the problem is not solved after printing a few pages, the drum may have

foreign material, such as glue from a label, stuck on the drum surface. Clean
the drum unit (see Cleaning the drum unit on page 146).
 Identify the colour causing the problem and put in a new drum unit (see
Replacing the drum units on page 120).
To identify the colour of the drum unit, visit us at http://solutions.brother.com/
to view our FAQs and troubleshooting tips.
 Identify the colour causing the problem and put in a new toner cartridge (see
Replacing the toner cartridges on page 110). To identify the colour of the
toner cartridge, visit us at http://solutions.brother.com/ to view our FAQs and
troubleshooting tips.
 Identify the colour causing the problem and put in a new drum unit (see
Replacing the drum units on page 120).
To identify the colour of the drum unit, visit us at http://solutions.brother.com/
to view our FAQs and troubleshooting tips.
 If the problem is not solved after printing a few pages, the drum may have
foreign material, such as glue from a label, stuck on the drum surface. Clean
the drum unit (see Cleaning the drum unit on page 146).
Identify the colour causing the problem and put in a new drum unit (see

Replacing the drum units on page 120).
To identify the colour of the drum unit, visit us at http://solutions.brother.com/
to view our FAQs and troubleshooting tips.
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