Canon iR C3380 series Service Manual page 289

The 1st sheet is moved for registration once again. The 2nd sheet is turned over and moved for duplexing registration. The 3rd sheet is picked up.
An image is formed for the 1st side of the 1st sheet and the 2nd side of the 3rd sheet. The 2nd sheet is moved for duplexing.
The 1st sheet is delivered. The 3rd sheet is turned over and is moved for duplexing registration. The 2nd sheet is moved for registration once again. The 4th sheet
is picked up.
2
1
3
F-8-35
1
1
3
2
F-8-36
1
3
2
4
F-8-37
Chapter 8
8-27