Canon iR105 Service Manual page 664

SERVICE MODE
COPIER>OPTION>USER
ORG-ODR
Use it to set the sequence in which double-sided originals are read when the
original orientation detection mechanism is enabled.
0: back → → → → → face (default)
Setting
1: face → → → → → back
S-103
COPYRIGHT© 2001 CANON INC. 2000 2000 2000 2000 CANON iR105 REV.0 JULY 2001