Canon TC-20 Online Manual page 342

9. 9. Check the print result.
Check if there are missing lines in the pattern C or horizontal streaks in the pattern D.
A: No missing lines/No horizontal streaks
B: Lines are missing/Horizontal streaks are present
10. 10. Select the pattern that is closer to the printed nozzle check pattern on the confirmation
screen.
For A (no missing lines or no horizontal 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 streaks are present) in the pattern C or pattern D, or in both
patterns:
The cleaning is required. Select Also B, then go to next step.
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