Canon i475D i475D Direct Printing Guide - Page 29

Print Head Deep Cleaning If print quality does not improve by standard print head cleaning, try print head deep cleaning, which is a more powerful process. Print head deep cleaning consumes ink, so perform this procedure only when necessary. 1 Ensure that the printer is on. 2 Start Print Head Deep Cleaning. (1) Press the Maintenance button. (2) Press twice to display 03 on the LCD. (3) Press the OK button. The process takes one or two minutes to complete, so simply wait until the Power lamp stops flashing. After print head deep cleaning finishes, print the nozzle check pattern to verify that the print head nozzles are clean. See "Printing the Nozzle Check Pattern" on page 26. If the print head is still not clean after the second deep cleaning, replace the ink tank. See "Replacing an Ink Tank" on page 31. If ink tank replacement does not resolve the problem, the print head may be worn out. Contact a Canon service representative. 28