Oki C330 - Manual (Page 13)

13 – Introduction
Switching off
1. Press the OK button on the control panel to enter the
menu.
2. Press the Menu down button and scroll to the Shutdown
menu.
3. Press the OK button.
4. Press the OK button to continue.
5. Press the OK button to execute.
6. At the prompt, turn the power switch OFF.
CAUTION!
Model C530 only: If you have an SD card fitted,
always follow the correct shutdown procedure to
ensure that no data is lost.