...my problem is very narrow moderately faint diagonal lines in any smooth tone such as a clear sky.
Like others, I have seen a variety banding and lines, but never anything that is diagonal.
Is it possible to post a picture showing them?
Because the head moves horizontally when actually printing, laying down line after line, as it were, it is difficult to figure out how a mechanical or hydraulic defect could produce a *diagonal* line. I cannot think of anything in my Epson printers
that “drags* slowly across the page as it moves past the print head.
Myron