Canon PIXMA iP8750 - Manual (Page 296)

Lines Are Misaligned
Check1 Did you confirm the paper and print quality settings?
Print Results Not Satisfactory
Check2 Perform Print Head Alignment.
If printed lines are misaligned or print results are otherwise unsatisfactory, adjust the print head position.
Aligning the Print Head
Note
• If the problem is not resolved after performing the Print Head Alignment, perform Print Head Alignment
manually referring to Aligning the Print Head Position Manually from Your Computer .
Check3 Increase the print quality and try printing again.
Increasing the print quality in the printer driver may improve the print result.
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