This link is a photo of a test page printed by a Canon 490 after a pretty hefty paper jam. Horizontal printing is fine. The vertical lines are straight when printing in one direction, left or right. But the left pass lines don't line up with the right pass.
My first thought was that there was some play in the connection of the print head to whatever moves it back and forth. But everything seem tight. I went through the auto-alignment software steps, not expecting it to help, and I was right - no improvement.
I replaced the black ink cartridge. Had been refilling. Now, not only is the alignment problem still there, it's printing really poorly. Fuzzy and skipping lines. Just about ready to trash this one and replace.
Any ideas how this might be corrected?
Here the top part of a test sheet:
Thanks in advance!
Bob