PrintheadsChecking for Nozzle CloggingIf printing is faint or streaked in different colors, make sure the Printhead nozzles are clear by printing a testpattern to check the nozzles.Note• You can specify a number of pages in the printer’s Noz. Check Freq. menu for automatic nozzlechecking every time you nish printing that quantity. (→P.59)1. Load unused paper.• Loading Rolls on the Roll Holder (→P.119)• Loading Rolls in the Roll Feed Unit (→P.121)• Loading the Roll in the Printer (→P.122)• Loading Sheets Manually (→P.151)2. Press the Menu button to display MAIN MENU.3. Press ▲ or ▼ to select Test Print, and then press the ► button.4. Press ▲ or ▼ to select Nozzle Check, and then press the ► button.5. Press ▲ or ▼ to select Yes, and then press the OK button.The printer goes online and prints a test pattern.6. Check the printing results.If the horizontal lines are not faint or incomplete, the nozzles are clear.If some sections of the horizontal lines are faint or incomplete, the nozzles for those colorsare clogged.If horizontal lines are faint or incomplete, follow the steps below and check again for nozzleclogging.1. Clean the Printhead. (→P.625)2. Print a test pattern to check the nozzles.Note• If you repeat these steps several times but the horizontal lines are still faint or incomplete, contactyour Canon dealer.624 Maintenance
