Canon S900 - Manual (Page 132)

Print Quality is Poor or Contains Errors 132
Troubleshooting
White Streaks
■ Print the nozzle check pattern to check the ink output.
If a specific color does not print in the nozzle check pattern, clean the printhead.
➡
Printing the Nozzle Check Pattern
➡
Printhead Cleaning
The problem can also be resolved by aligning the printhead. For details on printhead
alignment, refer to "
Straight Lines are Misaligned ".