Fujitsu ScanSnap S1500M Operator's Manual page 439

7.
Remove the pick roller with its shaft.
Gently lift the left part of the pick roller shaft (about 5 mm), move it towards the left, and
then pull it out.
The area around the pick roller may get dirty due to paper dust, and cause scan errors.
Wipe the dirt off with a cloth moistened with Cleaner F1 to prevent such errors.
Do not use water, mild detergent or aerosol spray.
Shaft
Pick roller
439
Replacing the Pick Roller