Scanner Mechanism - Brother MFC640CW Service Manual

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
White-level
reference film
CIS flat cable
CIS unit
Scanner base
Section 3.2.3.
3-4
ADF
ADF & document
cover ASSY
Document cover
Scanner top cover
CIS drive assembly
(CIS motor)
CIS drive belt
Scanner unit
(Scanner cover)
CIS idle pulley
CIS rail
Confidential