Canon iP5200 - Manual (Page 7)

Basic Printing
3
Turning off the Printer
1
To turn off the printer, press the POWER button.
When the POWER lamp stops blinking, the printer is turned off.
About the Power Plug
When removing the power plug after turing off the printer, be sure to
check that the POWER lamp is not lit. If the power plug is removed from
the wall outlet with the POWER lamp lit or blinking green, the printer
cannot protect its print heads and may be unable to print.