Brother MFC-9120CN User Manual page 143

Examples of poor print
quality
All one color
Color misregistration
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz. ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
Uneven density appears
periodically across the page
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
ABCDEFGHIJKLMNOPQRSTUVWXYZ. 0123456789. abcdefghijklmnopqrstuvwxyz.
Thin lines do not print
Recommendation
Identify the color causing the problem and put in a new drum unit.
(See Replacing the drum units on page 169.)
You may only need to replace one drum unit to solve the print
problem. To identify which drum needs to be replaced, please visit us
at http://solutions.brother.com/ to view our FAQs and troubleshooting
tips.
Make sure that the machine is on a solid level surface.
Perform the auto color registration using the control panel (see Auto
Registration on page 160) or perform the manual color registration
using the control panel (see Manual Registration on page 160).
Identify the color causing the problem and put in a new drum unit.
(See Replacing the drum units on page 169.)
You may only need to replace one drum unit to solve the print
problem. To identify which drum needs to be replaced, please visit us
at http://solutions.brother.com/ to view our FAQs and troubleshooting
tips.
Put in a new belt unit. (See Replacing the belt unit on page 172.)
Perform the calibration. (See Calibration on page 159.)
Adjust the contrast or brightness when you are in copy mode. (See
Adjusting Contrast, Color and Brightness on page 84.)
Identify the color that is uneven and put in a new toner cartridge for
that color. (See Replacing a Toner cartridge on page 163.)
You may only need to replace one toner cartridge to solve the print
problem. To identify which toner cartridge needs to be replaced,
please visit us at http://solutions.brother.com/ to view our FAQs and
troubleshooting tips.
Identify the color that is uneven and put in a new drum unit. (See
Replacing the drum units on page 169.)
You may only need to replace one drum unit to solve the print
problem. To identify which drum needs to be replaced, please visit us
at http://solutions.brother.com/ to view our FAQs and troubleshooting
tips.
Make sure Toner Save mode is off in the control panel of the machine
or the printer driver.
Change the print resolution.
®
If you use Windows printer driver, choose Improve pattern printing
or Improve Thin Line in Settings of Basic tab. (See Settings Dialog
in the Software User's Guide on the CD
Troubleshooting and routine maintenance
-
ROM.)
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