Konica Minolta AFR-12 General, Mechanical/Electrical page 14

1.6.6 Thin Mode (As set by "Original Thickness" of User's Mode)
When in this mode, the ADF transports the document at a low speed and
stops it without letting it hit against the Original Width Scale.
Rev. 1.0/05.99 M-11 AFR-12/AF-5