Ricoh C2828 Function Manual page 674

3. Users/Authentication and its Application
1. Press the [User Tools/Counter] key.
2. Press [System Settings].
3. Press [Timer Settings].
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4. Press [Auto Logout Timer].
If the setting to be specified does not appear, press [ Next] to scroll down to other settings.
5. Select [On].
If you do not want to specify [Auto Logout Timer], select [Off].
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