What is the correct procedure for turning OFF the main power on the MF1538C?
First, turn OFF the main power switch of the host machine and wait until all blinking on the Control Panel disappears. Disconnecting the power plug without first turning OFF the main power switch may cause damage to the machine. (Page 7)
From the official Canon imageCLASS MF1538C Multifunction Laser Printer manual, page 7
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