Scanner Mechanism - Brother MFC-9420CN Service Manual

3.4 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
White-level reference film
ADF
Scanner top cover
CIS flat cable
CIS unit
CIS drive ASSY
(CIS motor)
(4) Sensors.
Document cover
CIS drive belt
Scanner base
Fig. 3-41
3 - 4 5
ADF & document
cover ASSY
CIS idle pulley Scanner unit
(Scanner cover)
CIS rail
Confidential