Fujitsu N7100 Operator's Manual page 347

4. Clean the following parts with a soft cloth slightly moistened with
Cleaner F1 or with the Cleaning Wipe.
Ultrasonic sensor (×2)
(Also on the ADF paper chute)
Brake roller (×2)
 Brake roller (×2)
Remove the brake rollers from the scanner to clean.
For details on how to remove the brake rollers, refer to
Set" (page 354).
Gently wipe the dirt and dust off from along the slots on the surface of the brake
rollers. Take care not to damage the soft rubber.
6.3 Cleaning Inside the Scanner
Idler roller (×4)
Glass (×2)
(Also on the ADF paper chute)
347
Eject roller (×2)
Feed roller (×2)
Pick roller (×2)
"6.5.3 Replacing the Roller