Brother DCP-8070D Service Manual page 68

CIS model
(1) Set the document face down into the document chute. When the machine starts
duplex scanning. The ADF motor is rotated clockwise, the pick-up roller draws the
document, and the separation roller and separation pad send a sheet of the
document to the ADF one by one from the top page of the stacked documents.
(2) The document is passed through the paper feed roller 1 and is passed over the CCD
module so that the document is scanned. In duplex scanning, the document is sent
to the paper feed roller 3 by the switch back flap A, because the switch back flap A
goes up. Then the document is sent for the specified distance by the switch back
roller, and the switch back roller is turned counter so that the document is drawn
again.
Feed roller 3
Switch back flap A
Feed roller 2
Switch back actuator
Document rear actuator
(3) The drawn document is attached on the flap B and sent to the paper feed roller 1. At
this time, the opposite side of the document is faced-up so that the backside of the
document is scanned. The document is sent to the switch back roller again. The
document is sent to the eject roller , and then the document is sent to the document
eject tray, because the switch back flap A goes down.
Exit roller
Switch back flap A
Feed roller 2
Switch back flap B
Separation roller
Feed roller 1
Document front actuator 2
Front flap
Fig. 2-16
Feed roller 1
Switch back flap B
Fig. 2-17
Switch back roller
Document front actuator 1
Feed roller
Ejection flap
Switch back roller
Front flap
2-15
Ejection tray
Confidential