Brother HL-S7000DN User Manual page 145

Troubleshooting
Print quality difficulties (continued)
Difficulties
White vertical lines appear in
text or graphics.
The machine prints blank
pages.
Printed text or images are
skewed.
Smudge or stain at the top
center of the printed page.
Suggestions
Clean the print head. (See Cleaning the print head uu page 107.)
Make sure you are using Genuine Brother Ink.
Try using the recommended types of paper.
(See Acceptable paper and other print media uu page 2.)
Clean the print head. (See Cleaning the print head uu page 107.)
Make sure you are using Genuine Brother Ink.
Make sure the paper is loaded properly in the paper tray and the paper side guides
are adjusted correctly. (See Loading paper uu page 7.)
When you put paper into the paper tray, make sure you load at least 10 sheets of
paper in the tray. If loading fewer than 10 sheets of paper, use the MP tray instead.
(See Loading paper in the multi-purpose tray (MP tray) uu page 12.)
If the problem occurs during duplex printing, the duplex tray rollers may be stained
with ink. Tightly wring out a lint-free cloth soaked in lukewarm water, and then wipe
the five rollers (1) on the bottom of the tray.
1
Make sure the paper is not too thick or curled.
(See Acceptable paper and other print media uu page 2.)
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