Description - Ricoh ADF DF7010 Field Service Manual

Chapter 2 1 Description

1 Description

The machine contains a scanner of the document moving type which scans images while the
document is fed. The document is illuminated with the lamps while being transferred, and the
reflection in proportion to the document image darkness is imaged on the CCDs through the mirror
lens. Then the image is resoluted into picture elements and converted photoelectrically into the
level of electricity simultaneously.
The document is fed and carried by a single stepping motor. Two clutches (A and B) are used to
engage or disengage the ADF feed roller and the feed roller. The clutch is turned on only for feeding
paper to engage the scanner stepping motor with the driving system for the ADF feed roller. After
the document reaches the feed roller, clutch A is turned off and clutch B is turned on. The roller
follows the movement of the document (fed by the ejection roller).
ADF document sensor
ADF feed roller
ADF paper separator unit
Feed roller A
ADF document jam sensor
ADF document size PCB UNIT
ADF document lead edge sensor
Glass
Ejection roller
Lamp
Feed roller B
CCD
Lens
Mirror
ADF stepping Motor
Non-operator's side
ADF clutch A
gear unit
ADF clutch B
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