Canon MP970 Manuel D’Utilisation

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Routine Maintenance
2
The confirmation screens for white streaks and missing lines are displayed 
alternately. Select the pattern that is closer to the nozzle check pattern that you 
printed.
z
If There Are No Missing Lines and No White Streaks
(1) Select All A and press the OK button.
The LCD returns to the Maintenance screen.
z
If Lines Are Missing or White Streaks Are Present
(1) Select Also B and press the OK button.
The cleaning confirmation screen is displayed.
(2) Select Yes and press the OK button to start Print Head Cleaning.