Canon PIXMA MG6821 User Manual - Page 200

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 C or horizontal white streaks in the pattern D. A: No missing lines/No horizontal white streaks B: Lines are missing/Horizontal white streaks are present E: Number of sheets printed so far 2. Select the pattern that is closer to the printed nozzle check pattern on the confirmation screen. For A (no missing lines or no horizontal white streaks) in both the pattern C and pattern D: The cleaning is not required. Tap All A, confirm the message, then tap OK. The screen will return to the Maintenance screen. 200