Canon i-SENSYS LBP6670dn User Manual page 623

NOTE
About the setting for the time to execute auto shutdown
When [Auto Shutdown Time] is changed during sleep mode, the specified time to execute auto shutdown becomes
effective in the following cases.
When the printer is recovered from sleep
When the power of the printer is cycled
You can specify [Auto Shutdown Time] for auto shutdown with 1 hour increments between [After 1 hour] and [After 8
hours].
If you specify the setting for this option shorter than the default setting, this may shorten the life of the toner
cartridges (the default setting is "4" hours).
If the printer is not turned OFF immediately
Depending on the process in the printer, it may take up to 10 minutes to turn the printer OFF.
6
Set the auto shutdown weekly function as needed.
(1) Select the [Set Auto Shutdown Weekly Timer] check box.
(2) Specify the day and time when to execute auto shutdown.
All the default settings are that it is disabled.
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