Fujitsu S1500M - ScanSnap - Document Scanner Operator's Manual page 344

11.
Attach the sheet guide to the ScanSnap.
Hold the pickup tabs on the sheet guide between the thumb and index finger, and then
attach the sheet guide to the ScanSnap.
Sheet guide
⇒
The sheet guide makes a clicking sound when the pickup tabs fix into position.
Make sure that the sheet guide is completely attached. Otherwise, document jams or other
feeding errors may occur.
12.
Close the ADF top section.
ADF top section
⇒
You should hear the ADF top section click when it returns to its original position.
13.
Turn on the ScanSnap.
Pickup tab
344
Replacing the Pick Roller
Pickup tab
ADF paper
chute (cover)