Brother MFC640CW - Scanner Mechanism

3-4 Confidential
3.2.1 Scanner Mechanism
This mechanism consists of the automatic document feeder (ADF), document cover, and scanner
unit (scanner cover).
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.
ADF
White-level
reference film
CIS unit
CIS flat cable
Scanner base
CIS rail
CIS idle pulley
CIS drive belt
CIS drive assembly
(CIS motor)
Scanner top cover
Scanner unit
(Scanner cover)
Document cover
ADF & document
cover ASSY