Dell 1600n User Manual page 9

Remove the packing tape from the front, back and sides of the machine.
4
Remove the label completely from the scanner module by gently pulling it.
5
unlock switch automatically moves FORWARD to the unlock
NOTE: When you are moving the machine
or do not intend to use it for a long period of time,
move the switch BACKWARD to the lock position, as shown.
To scan or copy a document, the switch must be unlocked.
The scan
position.
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