On Sat, 25 Jun 2016 16:16:02 -0000 (UTC), "Emran M."
wrote:

On Sat, 25 Jun 2016 09:49:29 -0500, Ralph Phillips wrote:

Measure the distance between the streaks.

Using the downloadable service manual, or the "Print Quality" help page,
you can isolate which element is contributing to these streaks due to
how far apart they are (each of the rotating elements are a different
diameter, so their tell marks are different spacings apart.)

But the streaks are horizontal, while the rollers must (by nature)
be vertical???

I thought you put the 11" side first and notebook-sized paper moved 8
1/2 inches. So the rollers would be parallel to the 11" side.

I've read all your posts and they all seem to say that, except for
your conclusion that the rollers are vertical. I don't like either
horiz or vert, I don't know what they mean, but I do like parallel or
perpendicult to 11" side.

Does your owners manual have a troubleshooting section?