Canon PIXMA iP90 Quick Start Manual page 60

Printing Maintenance
4
Check the Print Head condition.
(1) Print a nozzle check pattern to check the Print Head condition.
See "Printing the Nozzle Check Pattern"
(2) If the problem persists, perform step 3 again.
(3) If the problem persists, the printer may have run out of ink.
See "Replacing an Ink Tank"
(4) If the problem persists, the Print Head may be damaged. Contact your dealer or
Canon Customer Care Center.
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