Cause
Tape for securing print head holder during transportation may still be attached.
What to Do
Open the scanning unit / cover and make sure the tape for securing the print head holder during transportation has been removed.
If the tape is still there, remove it and close the scanning unit / cover.
If this does not solve the problem, service is required.
For support and service options, sign into (or create) your Canon Account from the link below.
My Canon Account
TS6220 Support Page