Canon PIXMA iP4820 On-Screen Manual - Page 53

Examining the Nozzle Check Pattern Page 53 of 468 pages Advanced Guide Troubleshooting Contents > Routine Maintenance > When Printing Becomes Faint or Colors Are Incorrect > Examining the Nozzle Check Pattern C095 Examining the Nozzle Check Pattern Examine the nozzle check pattern, and clean the Print Head if necessary. 1. Check if there are missing lines in the pattern (1) or horizontal white streaks in the pattern (2). If there are missing lines in the pattern (1): Clean the print head nozzles of the Black ink group (PGBK). (A) Good (B) Bad (Lines are missing) If there are horizontal white streaks in the pattern (2): Clean the print head nozzles of the Color ink group (C, M, Y, BK). (A) Good (B) Bad (Horizontal white streaks are present) If there are missing lines in the pattern (1) and also there are horizontal white streaks in the pattern (2): Clean the print head nozzles of the All Colors ink group. 2. Take the appropriate action. When cleaning is not required: Click Exit on the Pattern Check dialog box to exit the nozzle check pattern examination. When cleaning is required: (1) Click Cleaning.