Canon BJC-3000 - Manual (Page 15)

15 Parts and Functions of the Printer
Hold down the reset button until the power lamp starts to flash.Then,
release the button.The following operations are performed, depending on
how many times you let the lamp flash:
• If you release the button after the lamp flashes once:
Print head cleaning is performed.
• If you release the button after the lamp flashes twice:
A nozzle check pattern is printed out.
• If you release the button after the lamp flashes three times:
Paper feed roller cleaning is performed
In this case,you must place the cleaning sheet in the auto sheet feeder in
advance.
Note