Nikon Super CoolScan 4000 ED User Manual page 12

Keep the Adapter Slot Closed
In order to ensure that your scanner always produces the best possible results, remove the adapter and
close the adapter slot cover when the scanner is not in use.
Never remove an adapter from the scanner without first ejecting the film and checking that the status LED
on the front of the scanner is glowing steadily. Do not insert or remove adapters, insert or eject film, or turn
the scanner off while the LED is blinking.
After using the scanner, eject the film from the adapter and turn the scanner off, then remove the adapter
and close the sliding cover.
Sliding cover
4