Brother MFC-7820N - Manual (Page 103)

Troubleshooting and routine maintenance
11 - 16
11
Improving the print quality
Examples of poor print quality Recommendation
Faint
Check the MFC’s environment. Conditions such as humidity, high temperatures,
and so on may cause this print fault. (See Choosing a location on page 1-2.)
If the whole page is too light, Toner Save mode may be on. Turn off Toner Save
mode in the MFC menu settings and in the printer Properties of the driver. (See Toner
Save on page 2-5 or Advanced tab in the Software User’s Guide on the CD-ROM.)
—OR—
If this problem occurs when making copies or printing received faxes, turn off
Toner Save mode in the MFC itself. (See Toner Save on page 2-5.)
Clean the scanner window and the primary corona wire on the drum unit.
(See Cleaning the laser scanner window on page 11-23 and Cleaning the corona
wire on page 11-24.) If the print quality has not improved, install a new drum unit.
(See Replacing the drum unit (DR-350) on page 11-28.)
Install a new toner cartridge. (See Replacing the toner cartridge (TN-350) on page
11-25.)
Gray background
Make sure that you use paper that meets the recommended specifications.
(See About paper on page 1-9.)
Check the MFC’s environment - high temperatures and high humidity can increase
the amount of background shading. (See Choosing a location on page 1-2.)
Install a new toner cartridge. (See Replacing the toner cartridge (TN-350) on page
11-25.)
Clean the primary corona wire on the drum unit. (See Cleaning the corona wire on
page 11-24.) If the print quality has not improved, install a new drum unit.
(See Replacing the drum unit (DR-350) on page 11-28.)
Ghost
Make sure you use paper that meets our specifications. Rough-surfaced paper or
thick print media may cause this problem.
Make sure that you choose the appropriate media type in the printer driver or in
the MFC’s Paper Type menu setting. (See About paper on page 1-9 and Basic tab
in the Software User’s Guide on the CD-ROM.)
Install a new drum unit. (See Replacing the drum unit (DR-350) on page 11-28.)
Toner specks
Make sure that you use paper that meets our specifications. Rough-surfaced
paper may cause the problem. (See About paper on page 1-9.)
Clean the primary corona wire and the drum unit. (See Cleaning the corona wire
on page 11-24 and Cleaning the drum unit on page 11-17.) If the print quality has
not improved, install a new drum unit. (See Replacing the drum unit (DR-350) on
page 11-28.)
Hollow print
Make sure that you use paper that meets our specifications. (See About paper on
page 1-9.)
Choose Thick paper mode in the printer driver or in the MFC’s Paper Type menu
setting, or use thinner paper than you are currently using. (See Setting the Paper
Type on page 2-3 and Basic tab in the Software User’s Guide on the CD-ROM.)
Check the MFC’s environment because conditions such as high humidity can
cause hollow print. (See Choosing a location on page 1-2.)
Clean the primary corona wire on the drum unit. (See Cleaning the corona wire on
page 11-24.) If the print quality has not improved, install a new drum unit.
(See Replacing the drum unit (DR-350) on page 11-28.)
All black
Clean the primary corona wire on the drum unit. (See Cleaning the corona wire on
page 11-24.)
If the print quality has not improved, install a new drum unit. (See Replacing the
drum unit (DR-350) on page 11-28.)
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