Canon imageCLASS D1650 All-in-One Monochrome Laser Printer - Manual (Page 466)

If the machine has not been operated or has had no data to process for a specified period of time, the machine enters
sleep mode to save energy consumption (Auto Sleep). Specify the period of time after which auto sleep is performed.
Auto Sleep is not performed when the setting menu is displayed. We recommend using the factory default settings to
save the most power. Entering Sleep Mode(P. 175)
1 to 120 (min.)
You can specify the time when the machine is automatically set to the sleep mode. Entering Sleep Mode(P. 175)
(0:00 to 12:59 AM/PM)
Specify the time when the machine is recovered from the sleep mode. Entering Sleep Mode(P. 175)
(0:00 to 12:59 AM/PM)
Setting Menu List
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