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3-3
3.2.1 Scanner Mechanism
This mechanism consists of the document cover, the scanner unit (scanner cover), and the
automatic document feeder (ADF).
The scanner unit consists of a scanner top cover, CIS unit, CIS drive assembly, and scanner base.
The detailed illustration on the next page shows the components making up the ADF: document
pull-in roller, document separation roller, document feed roller, ADF motor, and document front
and rear sensors.
For further details on the sensors, see Section 3.2.3.
Scanner base
CIS rail
CIS idle
p
ulle
y
CIS drive bel
t
CIS uni
t
CIS flat cable
CIS drive ASSY
(CIS motor)
Scanner top cove
r
White-level reference fil
m
Document cove
r
ADF
ADF & documen
t
cover ASSY
Scan
n
er uni
t
(Scanner cover)