Brother DCP-J785DW Basic User's Manual page 69

Difficulties
Vertical black lines
when sending.
Related Information
• Choose the Correct Receive Mode on page 29
• Clean the Scanner on page 40
Suggestions
Black vertical lines on faxes you send are typically caused by dirt or
correction fluid on the glass strip. Clean the glass strip.
See Related Information: Clean the Scanner at the end of this section.
57