Brother DCP-6690CW - Manual (Page 96)

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Cleaning the print head
B
To maintain print quality, the machine will
automatically clean the print head. You can
start the cleaning process manually if there is
a print quality problem.
Clean the print head and ink cartridges if you
get a horizontal line or blank text in the text or
graphics on your printed pages. You can
clean Black only, three colors at a time
(Cyan/Yellow/Magenta), or all four colors at
once.
Cleaning the print head consumes ink.
Cleaning too often uses ink unnecessarily.
CAUTION
DO NOT touch the print head. Touching the
print head may cause permanent damage
and may void the print head's warranty.
a
Press .
b
Press Cleaning.
c
Press and choose Black, Color or
All
.
The machine cleans the print head.
When cleaning is finished, the machine
will go back to standby mode
automatically.
Note
If you clean the print head at least five
times and the print has not improved, try
installing a new genuine Brother Branded
replacement cartridge for each problem
color. Try cleaning the print head again up
to five more times. If the print has not
improved call your Brother dealer.
Checking the print quality
B
If faded or streaked colors and text appear on
your output, some of the nozzles may be
clogged. You can check this by printing the
Print Quality Check Sheet and looking at the
nozzle check pattern.
Note
Make sure you put paper in the upper tray
for the initial setup.
a
Press .
b
Press Test Print.
c
Press Print Quality.
d
Press Color Start.
The machine begins printing the Print
Quality Check Sheet.
e
Check the quality of the four color blocks
on the sheet.
f
The LCD asks you if the print quality is
OK.
Do one of the following:
If all lines are clear and visible, press
Yes
to finish the Print Quality check
and go to step j.
If you can see missing short lines as
shown below, press No.
OK Poor
OK Poor