Brother MFC-9120CN User Manual page 151

Examples of poor print
quality
Colored lines across 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.
White spots or hollow print
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
Completely blank or some
colors are missing
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 spots at 94 mm
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
94 mm
(3.7 in.)
94 mm
(3.7 in.)
Colored spots at 30 mm
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
30 mm (1.2 in.)
30 mm (1.2 in.)
Recommendation
If colored lines appear at 1.2 in. (30 mm) intervals, replace the toner
cartridge that matches the color of the line. (See Replacing a Toner
cartridge on page 168.)
If colored lines appear at 3.7 in. (94 mm) intervals, put in a new drum
unit that matches the color of the line. (See Replacing the drum units
on page 174.)
If the problem is not solved after printing a few pages, the drum unit
may be stained. Clean all four drum units. (See Small spots on the
printed pages in Cleaning the drum unit on page 159.)
Make sure that the media type settings in the printer driver and in the
machine's Paper Type menu matches the type of paper you are
using. (See Acceptable paper and other print media on page 18 and
Basic tab in the Software User's Guide on the CD-ROM.)
'
Check the machine s environment. Conditions such as high humidity
can cause white spots or hollow print. (See Choosing a location
on page 108.)
Put in a new toner cartridge. (See Replacing a Toner cartridge
on page 168.)
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 174.)
To identify the color 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 unit
may have glue from a label stuck on the drum surface. Clean the
drum unit. (See Large spots on the printed pages on page 160.)
Put in a new drum unit. (See Replacing the drum units on page 174.)
To identify the color of the drum unit, visit us at
http://solutions.brother.com/ to view our FAQs and troubleshooting
tips.
Identify the color causing the problem and put in a new toner
cartridge. (See Replacing a Toner cartridge on page 168.)
To identify the color of the toner cartridge, visit us at
http://solutions.brother.com/ to view our FAQs and troubleshooting
tips.
Troubleshooting and routine maintenance
C
135