Dell 1600n Multifunction Mono Laser Printer User Manual page 26

The scan lamp under the scanner glass automatically turns off when it is not in actual use during a preset
period to reduce power consumption and extend the lamp life. The lamp automatically turns on and the
warm-up cycle begins whenever any key is pressed or the document cover is opened or a document is
detected in the ADF.
You can set the length of time for which the scan lamp waits after a scan job is completed before it switches
to the Power Save mode.
1. Press <Menu> until "Printer Setup" appears on top line of the display.
2. Press the scroll button (
3. Press the scroll button (
The available time options are 0.5, 1, 4, 8, and 12 (hours).
4. Press <Select> to save the selection.
5. To return to Standby mode, press <Return>.
or ) until "CCD Power Save" appears on the bottom line. Press <Select>.
or ) until the time setting you want appears on the bottom line.