Canon 3749B002 On-Screen Manual page 120

The cleaning is not required. Select All A and press the
(1)
Confirm the message and press the
(2)
The screen will return to the Maintenance screen.
Note
Press the HOME button to exit the Settings menu and display the HOME screen.
For (B) (lines are missing or horizontal white streaks are present) in (1) or (2) , or in both (1)
(2) :
The cleaning is required. Select Also B and press the
(1)
The cleaning confirmation screen will appear.
Select Yes and press the
(2)
The machine starts cleaning the Print Head.
See Cleaning the Print Head
button.
OK
button.
OK
.
button.
OK
and
button.
OK
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