Canon Color imageRunner C3220 Reference Manual page 272

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4
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4-90 Timer Settings
Press [M] or [L] to enter the desired Low-Power Mode Time ©
press [OK].
The Low-power Mode Time can be set from 10, 15, 20, 30, 40, 50 minutes,
1 hour, 90 minutes, 2, 3, and 4 hours.
The selected mode is set.
Press [Done] repeatedly until the Basic Features screen
appears.