Sindoh M612 - Manual (Page 159)

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Settings and changes of each function and additional functions
4
3 Press [Default Settings].
4 Press 【▲】, 【 ▼】 button until [Factory Defaults] appears, and then press 【Restore】 button.
5 [Reset Settings/Save Values?] on LCD screen.
[Cancel], [Restore] buttons are displayed.
6 Press [Confirm] button to restart the MFP machine. Be aware that all the settings are restored to factory
settings.