Lines of text are partially blank

[EricMeyn]

I've done every alignment and cleaning procedure available on my Pixma TS6220 printer. All of the test pages print out just fine.  But when I try to print a document with lines of text, about every fifth line has a big horizontal "streak" of unprinted letters that starts at the left side and goes half to two thirds of the way across the line.  I can't figure out how to fix this.

Arrows show streaked areas

[EricMeyn]

Also need to add that I'm not getting any error messages.