Fujitsu ScanSnap N1800 Operating Manual page 422

Glass (× 2)
Clean lightly with a soft cloth to wipe their surfaces clean.
A vertical black line on the scanned data may indicate that the glass is dirty.
Pick roller (× 1)
Gently rotate the pick roller from top down, to lightly wipe off the dirt and dust. Take
care not to damage the soft rubber. The pick roller should be cleaned carefully and
thoroughly, as a dirty pick roller can adversely affect the paper pickup
performance.
Feed rollers (× 2) and eject rollers (× 2)
When cleaning, turn on the power and let the feed rollers and eject rollers rotate.
1 On the [Main Menu] or [Job Menu] window, press the [Maintenance] button.
The [Maintenance] window appears.
2 Press the [Roller Cleaning] button.
The [Roller Cleaning] window appears.
7.3 Cleaning Inside the Scanner
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