Phaser 6180MFP Multifunction Printer Service Manual 2-87
Theory of Operation
Automatic Document Feeder (ADF)
■ Document Sensor
The Document Sensor detects the presence of media on the ADF
Document Tray.
■ Present: Beam is unshielded (unblocked)
■ Absent: Beam is shielded (blocked)
■ Cover Open Sensor
The Cover Open Sensor detects whether or not the ADF Top Cover is
open.
■ ADF Board
The ADF Board controls the sensors and motor in the ADF.
■ Feed Sensor
The Feed Sensor is located downstream from the Feed Roller to detect
completion of document feed.
■ Document Present: Shielded (blocked)
■ Document Absent: Unshielded (unblocked)
■ Registration Sensor
The Registration Sensor detects the preceding media is about to leave
the Registration Roller, thereby determining the next document feed can
be started.
■ Document Present: Shielded (blocked)
■ Document Absent: Unshielded (unblocked)
■ ADF Motor
The ADF Motor rotates the Nudger Roller, Feed Roller, Takeaway Roller,
Registration Roller, and Exit Roller.
s6180mfp-096
ADF Motor
Cover Open Sensor (Upper Chute I / L)
Feed Sensor
Registration Sensor
Document Sensor
ADF Board
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