148 Chapter 10Routine MaintenanceWhen Printing Becomes Faint or Colors are IncorrectWhen printing becomes faint or colors are incorrect, even if ink remains in the ink tanks, the PrintHead nozzles are probably clogged. Follow the procedures below to clean the nozzles.If the ruled lines are shifted after running the Print Head maintenance, align the Print Head.z If the ruled lines are shiftedNoteBefore printing the nozzle check pattern or cleaning the Print Head, check the following;– Open the Scanning Unit (Printer Cover), and make sure that all the ink tanks click into place andthen their lamps light red.– If any one of the lamps is flashing, the associated ink tank is empty or running low. See “Gettingthe Ink Level Information” on page 142.If an ink tank lamp is flashing even though ink remains in that ink tank, it is inserted in the wrongposition. Make sure that the correct ink tank color is inserted in each position. Open theScanning Unit (Printer Cover) and make sure all the ink tank lamps are lit. See “Replacing anInk Tank” on page 142.– If the ink tank lamp is unlit, press the mark on the ink tank firmly until it clicks to fully insertit. Make sure that all packaging material is peeled off the ink tank. See “Replacing Ink Tanks” onpage 143.Step 1See “Printing the Nozzle Check Pattern” on page 149After Print Headcleaning, print thenozzle checkpattern.If missing lines or white stripes appearStep 2See “Print Head Cleaning” on page 151If the problem remains after performing Print Headcleaning twiceStep 3See “Print Head Deep Cleaning” on page 152NoteIf Print Head Deep cleaning does not resolve the problem, contact the Canon Customer CareCenter.Step 1See “Aligning Print Head automatically” on page 153
