Brother MFC-8520DN User Manual page 132

Examples of poor print
quality
Hollow print
All black
ABCDEFGH
abcdefghijk
A B C D
a b c d e
0 1 2 3 4
White lines across the page
124
Recommendation
 Make sure that you use paper that meets our specifications.
uu Acceptable paper and other print media uu page 19
 Choose Thick Paper mode in the printer driver, choose Thick in the
machine's Paper Type menu setting or use thinner paper than you
are currently using.
uu Paper Type uu page 16
uu Software User's Guide: Printing (for Windows
uu Software User's Guide: Printing and Faxing (for Macintosh)
 Check the machine's environment. Conditions such as high humidity
can cause hollow print.
uu Product Safety Guide: Choose a safe location for your product
 The drum unit may be damaged. Put in a new drum unit.
uu Replacing the drum unit uu page 72
 Clean the corona wire inside the drum unit by sliding the green tab.
Be sure to return the green tab to the home position (a).
uu Cleaning the corona wire uu page 80
 The drum unit may be damaged. Put in a new drum unit.
uu Replacing the drum unit uu page 72
 Make sure that you use paper that meets our specifications. A rough
surfaced paper or thick print media can cause this problem.
See Acceptable paper and other print media uu page 19.
 Make sure that you choose the appropriate media type in the printer
driver or in the machine's Paper Type menu setting.
uu Paper Type uu page 16
uu Software User's Guide: Printing (for Windows
uu Software User's Guide: Printing and Faxing (for Macintosh)
 The problem may disappear by itself. Print multiple blank pages to
clear this problem, especially if the machine has not been used for a
long time.
The drum unit may be damaged. Put in a new drum unit.

uuReplacing the drum unit uu page 72
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