Canon DADF-Q1 Service Manual page 62

Chapter 2
1) The machine picks up the 1st original, and butts its lead edge against the original roller to remove the skew. (For details of pickup operation, see 'Original Pickup/
Separation.')
2) As soon as the original is placed on the copyboard glass, the host machine starts to read it using its scanner.
3) The machine sends the original to the reversing path as the host machine moves its scanner in reverse.
4) The machine turns over the 1st original, and places it on the copyboard glass.
5) The host machine scans the back of the 1st original
6) The machine turns over the 1st original once again.
2-40
1st original
Registration roller
1st original
1st original
1st original
1st original
1st original
F-2-89
F-2-90
F-2-91
F-2-92
F-2-93
F-2-94