Do you have a question about the Canon MP21D III and is the answer not in the manual?
Avoid direct sun, dust, and use dry cloth for cleaning; do not place objects on printer.
Turn off power before unplugging and disconnect in case of trouble.
Remove tape, plug in power, and check paper/ribbon installation.
Instructions for removing old ribbon and installing new ribbon, including important notes.
Steps for placing a new paper roll and feeding the tape into the printer.