Brother DCP-4020C - Manual (Page 210)

TROUBLESHOOTING AND ROUTINE MAINTENANCE 15 - 9
STEP A: Colour block quality check
The LCD shows:
4
Check the quality of the four colour blocks on the sheet.
(BLACK/CYAN/YELLOW/MAGENTA).
5
If all lines are clear and visible, press 1 ( YES ) to go to STEP B.
—OR—
If you can see missing short lines as shown below, press
2 ( NO ).
The LCD will ask you if the print
quality is OK for each colour.
6
Press 2 ( NO ) for any colour with a
problem.
The LCD shows:
Press
1 ( YES ). The DCP will start
cleaning the colours.
7
After cleaning is finished, press Colour Copy . The DCP will
start printing the Print Quality Check Sheet again and then
return to STEP A.
8
If STEP A is OK, press 1 to proceed to STEP B.
OK Poor
IS STEP “A” OK?
1.YES 2.NO
BLACK OK?
1.YES 2.NO
START CLEANING?
1.YES 2.NO