Troubleshooting
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6
Hollow print
Make sure that you use paper that meets our specifications. See About
paper on page 5.
Choose Thick paper mode in the printer driver, or use thinner paper than what
you are now using.
Check the printer’s environment. Conditions such as high humidity can cause
hollow print. See Positioning the printer on page 4.
All black
Clean the primary corona wire inside the drum unit by sliding the green tab. Be
sure to return the green tab to the home position (a). See Clea ning the corona
wire on page 77.
The drum unit may be damaged. Put in a new drum unit. See Replacing the drum
unit on page 69.
The fuser unit may be contaminated. Call Brother Customer Service.
White lines across the page
Make sure that you use paper that meets our specifications. A rou gh surfaced
paper or thick print media can cause problems.
Make sure that you choose the correct media type in the printer driver.
The problem may disappear by itself. Print multiple pages to clear t his problem,
especially if the printer has not been used for a long time.
The drum unit may be damaged. Put in a new drum unit. See Replacing the drum
unit on page 69.
Lines across the page
Clean the inside of the printer and the primary corona wire in the drum unit. See
Cleaning on page 73.
The drum unit may be damaged. Put in a new drum unit. See Replacing the drum
unit on page 69.
White lines down the page
Make sure that a torn piece of paper is not inside the printer covering the scanner
window.
Wipe the scanner window with a soft cloth. See Cleaning the inside of the
printer on page 74.
The toner cartridge may be damaged. Put in a new toner cartridge. See
Replacing the toner cartridge on page 62.
The drum unit may be damaged. Put in a new drum unit. See Replacing the drum
unit on page 69.
Examples of poor print
quality
Recommendation
ABCDEFGH
abcdefghijk
ABCDabcde01234
ABCDEFGH
abcdefghijk

ABCD

abcde

01234

ABCDEFGH
abcdefghijk

ABCD

abcde

01234