Canon BJ-20 User Manual page 31

Testing the Whole System
If all of the previous steps were successfully completed, you can do the
final testing.
Make sure the computer is turned on.
Turn on the printer.
1
The POWER and ERROR indicators light.
2
Insert a sheet of paper (see loading standard paper page 45).
Press the LF/FF switch.
3
The paper advances to the position ready for printing.