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.

Switch back sensor

 

Flap C

Paper feed roller 1

 

 

 

Paper feed roller 2

Flap B

 

SB roller ASSY

Separation roller

 

 

 

 

Pick-up roller

Document rear

 

 

 

Document front

sensor actuator

 

 

 

 

 

 

sensor actuator 1

 

 

 

 

Paper feed roller 3

 

 

 

Document front

 

 

 

sensor 1

 

 

 

 

 

 

 

 

Document front

 

 

 

 

sensor actuator 2

 

 

 

 

Eject roller

Document rear sensor

 

 

 

 

Switch back

 

Paper feed roller 4 Flap A

Document front sensor 2

 

 

sensor actuator

 

 

 

 

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).

2-9

Confidential