2-9
Confidential
(4) Internal structure
The automatic document feeder (ADF) consists of the separation roller shaft ASSY, paper
feed roller, ejection roller, ADF motor, document rear sensor, document front sensor and
ADF cover open sensor.
For further details on the sensors, refer to “3.7 Location of Sensors” in this chapter.
Fig. 2-7
In this reading system, “copyboard glass scanning” and “ADF scanning” are available.
These scanning types are switched based on whether or not the document front sensor
detects any document at the time when the scanning operation starts.
(5) ADF scanning (The document moves over the immovable CIS unit.)
1) Set the document face up into the document chute. When the machine starts simplex
scanning, the ADF motor is rotated clockwise, the suction roller draws the document,
and the separation roller and separation pad send a sheet of the document to the ADF
one by one from the top page of the stacked documents.
2) The document is passed through the paper feed roller, and is passed over the CIS
unit so that the document is scanned. Then, the document is ejected to the document
cover by the ejection roller.
Fig. 2-8
Pressure roller
Paper feed roller
Pressure roller
Document rear actuator
Document front actuator
Pressure roller
Ejection roller
Separation pad
Separation roller
Separation roller shaft ASSY
Document front sensor
ADF cover open sensor
Document rear sensor
Suction roller
Separation roller shaft ASSY
Pressure roller
Paper feed roller
Pressure roller
Pressure roller
Document cover
Ejection roller
CIS unit
Separation pad
Separation roller
Suction roller
Paper feed chute ASSY