Brother Facsimile Equipment MFC7420 - Manual (Page 48)

Confidential 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 pulley
CIS drive belt
CIS unit
CIS flat cable
CIS drive ASSY
(CIS motor)
Scanner top cover
White-level reference film
Document cover
ADF
ADF & document
cover ASSY
Scanner unit
(Scanner cover)