Canon DADF-AV1 Service Manual page 23

Start of reading of reverse
side of second document sheet
End of reading of reverse
side of second document sheet
Stop after feeding the second
document sheet to reversal position
Removal of idle registration
loop at the second document sheet/
Re-pickup/Release of
the Lower delivery reversal roller
Delivery of second document sheet/
Pressurization at
the Lower delivery reversal roller
Completion of delivery of
second document sheet/end of job
17
2. Technical Explanation