Troubleshooting and routine maintenance

11 - 16

11
Improving the print quality
Examples of poor print quality Recommendation
Faint
Check the machine’s en vironment. Conditio ns such as humidit y, 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 Advanced ta b of printer driver Properties.
—OR—
If this problem occurs when m aking copies or printing received faxes, turn off
Toner Save mode in the machine i tself. (See Toner Save on pa ge 2-7.)
Clean the scanner window and the primary corona wire on the drum unit. (See
Cleaning the laser sca nner window on page 11-22 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 uni t (DR-350) on page 11-27.)
Install a new toner cartridge. (S ee Replacing the toner ca rtridge (TN-350) on page
11-24.)
Gray background
Make sure that you use paper that meets the recommended specifications. (See
About paper on page 1-8.)
Check the machine’s en vironment - high te mperatures and hig h humidity can
increase the amount of background shading. (See Choosing a location on page
1-2.)
Install a new toner cartridge. (S ee Replacing the toner ca rtridge (TN-350) on page
11-24.)
Clean the primary corona wir e on the drum unit. (See Cleaning the cor ona wire on
page 11-24.) If the print quality has not improved, install a new drum unit. (See
Replacing the drum uni t (DR-350) on page 11-27.)
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 machine’s Paper Type menu setting. (See About paper on page 1-8 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 11-27.)
Toner specks
Make sure that you use paper that meets o ur specifications . Rough-surfaced
paper may cause the problem. (See About paper on page 1-8.)
Clean the primary cor ona wire and the drum unit. (See Cleani ng the corona wire
on page 11-24 and Cleaning the drum unit on page 11-1 7.) If the print quality has
not improved, install a new drum unit. (See Replacing the drum unit (DR-350) on
page 11-27.)
Hollow print
Make sure that you use paper that meets our specifications. (See About paper on
page 1-8.) Choose Thick paper mode in the printer driver or in the machine’s
Paper Type menu setting, or use thinner paper than you are currently using.
Check the machine’s environment because conditions such as high humidity can
cause hollow print. (S ee Choosing a locat ion on page 1-2.)
Clean the primary corona wir e on the drum unit. (See Cleaning the cor ona wire on
page 11-24.) If the print quality has not improved, install a new drum unit. (See
Replacing the drum uni t (DR-350) on page 11-27.)
All black
Clean the primary corona wir e on the drum unit. (See Cleaning the cor ona wire on
page 11-24.)
If the print quality has not improved, insta ll a new drum unit. ( See Replacing the
drum unit (DR-350) on page 11-27.)
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