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4. Internal structure
The automatic document feeder (ADF) consists of the pick-up roller, separation roller,
paper feed rollers 1/2/3/4, eject roller, ADF motor, switch back sensor, document rear
sensor and document front sensors 1/2.
For further details on the sensors, see 3.6 Sensors position.
Fig. 2-7
The duplex scanning mechanism allows you to use the following two types of scanning,
“ADF scanning” and “document glass scanning”. These two scanning methods are
switched depending on whether the document front sensor 1 detects the document or not
when starting scanning.
However, there is the case that the “document glass scanning” is given priority to over by
a state of the document cover sensor (described later).
Switch back sensor
Paper feed roller 2
Document rear
sensor actuator
Paper feed roller 3
Document rear sensor
Switch back
sensor actuator
Paper feed roller 4
Flap A
Document front sensor 2
Eject roller
Document front
sensor actuator 2
Document front
sensor 1
Document front
sensor actuator 1
Pick-up roller
Separation roller
Paper feed roller 1
SB roller ASSY
Flap C
Flap B