Canon MG7100 series Online Manual page 193

The confirmation screen will appear.
(4) Tap Yes.
The machine starts cleaning the print head.
Do not perform any other operations until the machine completes the cleaning of the
print head. This takes about 2 to 3 minutes.
The pattern print confirmation screen will appear.
(5) Tap Yes.
The nozzle check pattern will be printed.
5. Examine the nozzle check pattern.
Examining the Nozzle Check Pattern
Note
Touch the HOME button to exit Setup and display the HOME screen.
If the problem is not resolved after cleaning the print head twice, clean the print head
deeply.
Cleaning the Print Head Deeply
193