Brother MFC-J3930DW Online User's Manual page 657

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5. The touchscreen asks you to check the print quality of each colour. Press the number of the pattern (1–4)
that most closely matches the printing result.
6. Do one of the following:
• If print head cleaning is needed, press [Start] to start the cleaning procedure.
• If print head cleaning is not needed, the Maintenance screen reappears on the touchscreen. Press
7. After the cleaning procedure is finished, the touchscreen asks if you want to print the Print Quality Check
Sheet again. Press [Yes], and then press [Start].
The machine prints the Print Quality Check Sheet again. Check the quality of the four colour blocks on the
sheet again.
If you clean the print head and the print has not improved, try installing a new Brother Original replacement ink
cartridge for each problem colour. Try cleaning the print head again. If the print has not improved, contact
Brother customer service or your local Brother dealer.
IMPORTANT
DO NOT touch the print head. Touching the print head may cause permanent damage and may void the print
head's warranty.
When a print head nozzle is clogged, the printed sample looks like this.
After the print head nozzle is cleaned, the lines are gone.
Related Information
• Check Your Brother Machine
• Paper Handling and Printing Problems
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