Brother International MFC-7050C Service Manual - Page 17

Brother International MFC-7050C Manual

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Paper pulling-in and registration mechanism N Friction gear (1) Secondary gear C Middle gear B (Idle gear) ASF Supply gear /\ \ Friction gear (2), idling Secondary gear A (2) Feed gear Middle gears Exit gear Secondary gear A (1) Motor gear Paper feed motor Secondary gear B If the paper feed motor rotates clockwise, the rotational torque is transmitted via the gear train to the supply gear built in the auto sheet feeder (ASF). The supply gear rotates once counterclockwise to pull in paper from the ASF, a sheet at a time. Since the gear is a sector gear, it will stop when the toothless section comes to the joint with the mating middle gear B (idle gear). The motor continues to rotate clockwise for driving the registration mechanism. The rotational torque is transmitted via the gear train to the feed gear that rotates counterclockwise. This registers the leading edge of the pulled-in paper. III - 6

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Paper
pulling
-in
and
registration
mechanism
Middle
gear
B
(Idle
gear)
ASF
N
Friction
gear
(1)
Supply
gear
/\
\
Friction
gear
(2),
idling
Secondary
gear
C
Secondary
gear
A
(1)
Motor
gear
Paper
feed
motor
Secondary
gear
A
(2)
Feed
gear
Middle
gears
Secondary
gear
B
Exit
gear
If
the
paper
feed
motor
rotates
clockwise,
the
rotational
torque
is
transmitted
via
the
gear
train
to
the
supply
gear
built
in
the
auto
sheet
feeder
(ASF).
The
supply
gear
rotates
once
counterclockwise
to
pull
in
paper
from
the
ASF,
a
sheet
at
a
time.
Since
the
gear
is
a
sector
gear,
it
will
stop
when
the
toothless
section
comes
to
the
joint
with
the
mating
middle
gear
B
(idle
gear).
The
motor
continues
to
rotate
clockwise
for
driving
the
registration
mechanism.
The
rotational
torque
is
transmitted
via
the
gear
train
to
the
feed
gear
that
rotates
counterclockwise.
This
registers
the
leading
edge
of
the
pulled
-in
paper.
III
-
6