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Sleep mode
If the printer remains inactive for a specified period after entering Fusing Unit Off mode, it enters
Sleep mode to further reduce the power consumption. The printer also enters Sleep mode when:
• The printer waits before entering Sleep mode is set in [Sleep Mode Timer]
• It is the day and time specified in [Weekly Timer]
When the printer is in Sleep mode, only the [Energy Saver] key and the [Check Status] key are
usable. (for SP C342DN)
The printer can print jobs from computers.
You can change the amount of time that the printer waits before switching to Sleep mode.
For details about setting [Sleep Mode Timer] and [Weekly Timer], see:
• page 234 "System (SP C340DN)" (for SP C340DN)
• page 288 "Timer Settings" (for SP C342DN)
To exit Sleep mode, do one of the following:
• Press one of the keys on the control panel (for SP C340DN)
• Press the [Energy Saver] key or [Check Status] key (for SP C342DN)
• Start print jobs
ECO Night Sensor
ECO Night Sensor can detect darkness and automatically turn off this product's power.
If ECO Night Sensor is enabled and detects darkness in a room after the lights are turned off, the
sensor automatically turns the power off and reduces the power consumption of this product to 1W
or less.
The default settings of ECO Night Sensor are enabled.
To change the settings, see:
• page 234 "System (SP C340DN)" (for SP C332DN)
• page 300 "Administrator Tools" (for SP C333DN)
• The ECO Night Sensor function's factory default is [Auto Power Off Only]. If the printer is located in
an environment where the ambient light level is low (such as in a hallway or a location with motion
sensor lighting), it is advisable that you either keep this function disabled or adjust its sensitivity.
• You can configure the printer to automatically turn its power on when it detects an increase in the
ambient light level. The printer may also react to daylight and turn its power on. If the printer is
located in an environment where it is exposed to direct sunlight, it is advisable that you do not
change the factory default configuration and only enable [Auto Power Off Only].
• When the printer is in Sleep mode, the [Energy Saver] key flashes slowly. (for SP C342DN)
Turning On/Off the Power
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Draft 2016/01/18