Nikon Super CoolScan 4000 ED User Manual page 96

When rotating the rollers, turn the toothed wheel slowly with the ball of your thumb. Do not use force
or attempt to turn the wheel with a screwdriver or other rigid object, as this could deform the wheel.
Rollers
Toothed wheel
Roller frame
Work with the adapter and scanner on a table or other flat, stable surface. The adapter or scanner
could be damaged should either fall to the floor.
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