Brother MFC260C Service Manual page 92

Normal SF mode
1st stage The paper feed motor rotates counterclockwise (when viewed from the output gear side)
and its rotational torque is transmitted to the PF roller gear L that rotates the paper feed
roller in the reverse direction. (See the illustration on
At the right end of the paper feed roller is the PF roller gear R that always meshes with
the clutch gear. The clutch gear also meshes with the SF changeover gear when the mode
switching lever is placed in the normal SF mode position (Leftmost position).
The rotational torque is further transmitted from the SF changeover gear via the SF idle
gears to the paper pull-in gear shaft and gear train in the paper pull-in roller holder.
Consequently, the paper pull-in rollers turn in the forward direction to pull in a sheet of
paper loaded in the paper tray.
2nd stage After the pulled-in paper pushes the registration sensor actuator to turn the sensor on,
the motor further rotates counterclockwise for the predetermined period to align
(register) the leading edge of the paper with the paper feed roller rotating in the reverse
direction.
3rd stage The paper feed motor changes the rotational direction to clockwise to rotate the paper
feed roller in the forward direction to feed the paper to the printing start position.
The rotational torque of the PF roller gear L is also transmitted via the ejection idle gear
and PF timing belt to the paper ejection roller that rotates in the forward direction to
eject the paper printed.
High-speed feed mode
1st stage The paper feed motor rotates clockwise (when viewed from the output gear side) and its
rotation is transmitted to the PF roller gear L that rotates the paper feed roller in the
forward direction.
At the right end of the paper feed roller is the PF roller gear R that always meshes with
the clutch gear. The clutch gear also meshes with the HS changeover gear when the
mode switching lever is placed in the high-speed feed mode position (2nd position from
the left).
The rotational torque is further transmitted from the HS changeover gear via the HS idle
gear to the paper pull-in gear shaft and gear train in the paper pull-in roller holder. Just
as in the normal SF mode, the paper pull-in rollers turn in the forward direction to pull
in a sheet of paper loaded in the paper tray.
Registration sensor activation has no effect on the paper feeding operation in the high-
speed feed mode.
The paper feed roller keeps rotating in the forward direction; therefore, the paper
continues to advance to the printing start position.
Just as in the normal SF mode, the rotational torque of the PF roller gear L is also
transmitted via the ejection idle gear and PF timing belt to the paper ejection roller that
rotates in the forward direction to eject the first sheet of paper printed.
Even after the first sheet of paper leaves the paper tray, the paper pull-in rollers keep
rotating in the forward direction to continuously pull in paper sheet by sheet. At the
completion of the first printing sequence, another sheet of paper has been halfway pulled
in. The paper feed roller always rotates faster than the paper pull-in rollers; therefore,
the trailing edge of the preceding sheet will not overlap with the leading edge of the
subsequent one.
2nd stage When the registration sensor actuator returns to the no-paper state after completion of a
sequence of printing operation, the paper feed motor starts rotating counterclockwise to
rotate the paper pull-in rollers in the reverse direction so that the halfway-pulled-in
paper goes back into the paper tray. The paper hits the paper length guide provided in
the paper tray and goes back into place.
3-41
page 3-39.)
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