Canon PIXMA iP4820 On-Screen Manual - Page 49

When Printing Becomes Faint or Colors Are Incorrect Page 49 of 468 pages Advanced Guide Troubleshooting Contents > Routine Maintenance > When Printing Becomes Faint or Colors Are Incorrect C093 When Printing Becomes Faint or Colors Are Incorrect If print results are blurred or colors are not printed correctly, the print head nozzles are probably clogged. Follow the procedure below to print the nozzle check pattern, check the print head nozzle condition, then clean the Print Head. If printed ruled lines are misaligned or print results are otherwise unsatisfactory, aligning the Print Head may improve print quality. Important Do not rinse or wipe the Print Head and ink tanks. This can cause trouble with the Print Head and ink tanks. Note Before performing maintenance Make sure that the orange protective tape does not remain on the ink tank. Refer to "Troubleshooting " in the on-screen manual: Advanced Guide . Open the Top Cover and make sure that all lamps on the ink tanks are lit red. If not, see Checking the Ink Status and take an appropriate action. Increasing the print quality in the printer driver settings may improve the print result. For details, refer to the on-screen manual: Advanced Guide . When the Print Results Are Blurred or Uneven: Step 1 See Printing the Nozzle Check Pattern . See Examining the Nozzle Check Pattern . If there are missing lines or horizontal white streaks in the pattern: After cleaning the Print Head, print and examine the nozzle check pattern. Step 2 See Cleaning the Print Head . If the problem is not resolved after cleaning the Print Head twice: Step 3 See Cleaning the Print Head Deeply . Note When you have performed the procedure until step 3 and the problem has not been resolved, turn off the power and clean the Print Head deeply again after 24 hours. If the problem is still not resolved, the Print Head may be damaged. Contact the service center. When the Print Results Are Not Even such as the Ruled Lines Are Misaligned: See Aligning the Print Head .