Canon PIXMA TS9020, Online Manual

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For A (no missing lines or no horizontal white streaks) in both the pattern C and pattern D:
The cleaning is not required. Select All A , confirm the message, then select OK .
The screen will return to the Maintenance screen.
For B (lines are missing or horizontal white streaks are present) in the pattern C or pattern D, or
in both patterns:
The cleaning is required. Select Also B , then select Yes on the cleaning confirmation screen.
The printer starts cleaning the print head.
Cleaning the Print Head
If the pattern D or any color in the pattern C is not printed:
(Example: Magenta pattern is not printed)
The cleaning is required. Select Also B , then select Yes on the cleaning confirmation screen.
The printer starts cleaning the print head.
Cleaning the Print Head
Note
• The total number of sheets printed so far is shown in increments of 50 sheets on the printout of the
nozzle check pattern.
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