Canon i 850 - Manual (Page 137)

Print Quality is Poor or Contains Errors 137
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 print head.
➡
Printing the Nozzle Check Pattern
➡
Print Head Cleaning
The problem can also be resolved by aligning the print head. For details on print head
alignment, refer to "
Straight Lines are Misaligned ".