Brother MFC-J3520 Service Manual page 339

- Selectors 5 and 6: Measure for black vertical streaks at trailing edge of paper
When the ending edge of recording paper exits the paper feed roller, recording paper
stretches to the center of the paper ejection roller in high density printing, and
consequently black streaks might appear in the print result. The paper feeding
amount is corrected according to the print density. Moreover, the stretch amount
varies depending on the material of recording paper, and therefore the paper feeding
correction value is changed based on the material to alleviate black streaks at the
ending edge of recording paper.
- Selectors 7 and 8: Automatic purging interval programmed for matching the
The "automatic purging interval programmed for matching the ambient temperature"
is enabled by default. If the machine is set in an excessively hot or cold place,
therefore, the automatic purging interval becomes short, resulting in increased ink
waste.
Disabling this interval enables the one programmed for the ordinary temperature. In
the first printing after a long no-print period, however, the print quality may lower.
ambient temperature
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