BANDING PRINTS GRAY LINES ON WHITE

The troubleshooting section for banding below was taken from the user manual found at this web link:
https://files.support.epson.com/pdf/wf3520/wf3520ug.pdf

White or Dark Lines in Printout

If you notice white or dark lines in your prints (also called banding), try these solutions before you reprint:

• Run a nozzle check to see if any of the print head nozzles are clogged. Then clean the print head, if necessary.

• Make sure the paper type setting matches the type of paper you loaded.

• Make sure you loaded the printable side of the paper correctly for your product.

• Turn off any high speed settings in your product software.

• Align the print head.

• You may need to replace the ink cartridges.

Hope this helps...

white lines\bands are usually due to dirty PH unit windows. Have you cleaned the PH units ?

Yes - surprisingly - we had the same problem, the gray stripe along the side of the page only showed up when the original was fed through the document feeder on top. Cleaned the small area of glass under the feeder repeatedly with no change to the resulting stripe, but then while cleaning the upper roller, above the area of glass where the scan lamp illuminates during the copying from the ADF, we found a small piece of paper adhering to the top roller in the paper path, cleaned it off, and no more band. We didn't see the bit of paper on the upper roller until we rolled it while cleaning. Still can't figure how that made a stripe....but hope this helps you.

When you go to print (apple/p) and the dialog box comes up (lists printer, presets, copies, etc)
There should be a gray horizontal line across the middle of this dialog box. Note the drop down box that is on this gray line ... this is an important drop down box. When you select different items in this box, all the options underneath the gray line change.
The selection in this box is probably "Layout" by default. Change it to look at the different options, but as things change below the gray line don't get confused about which is the "main" selector drop down for changing all the options .. it's the one on the gray line ....
I'm using an HP printer, and when I select "Paper Type/Quality" in this drop down, I get an option under the gray line that says "color" -- the options in that box include the option for "Grayscale"
If I were to select Grayscale, then the printer will print only in black and white and shades of gray.
That's the easiest way to do what you want, and it will apply to any program you are printing from, since you are selecting "Grayscale" from the print dialog.

Look through all the different variables in the print dialog to become familiar with them.
If you often use one particular setting and don't want to have to go through the sometimes confusing search through the drop downs, since they change back to their defaults each time you print, then you can set a "Preset" - this will remember your settings and allow you to get to them easily ...
To do this, first select all the options the way you like them, for example you might select Grayscale under the Color option under the Print Quality section. Then, before you actually print anything, go the the top where it says "Presets" and do a "Save As" and choose a Preset name that will be meaningful to you ... like "grayscale" -
Next time you print, keep an eye on the preset - it may NOT go back to the default of "Standard." It may stay on the last-used Preset ... so keep an eye on it before hitting the print button.

Hope this helps!

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You don't need to do head alignment, because it is for vertical banding in printout. Vertical banding can be minimized by disabling high speed option without doing head alignment. If your printout have horizontal white lines, do check nozzle and head cleaning, or you can minimize white lines by printing in best quality (photo).

Nozzle check must perfect for perfect output. There are tranversal lines at vertical straight lines that represent same point of head micro piezo. If tranversal lines no clog at all, but vertical straight lines not perfectly straight, the result not good (like horizontal white banding). Check it? Head aligment is for vertical banding. If your result is horizontal banding, you don't need to realign head. It's caused by some residual at the output of head sprayer. So, the spray of ink not straight to paper. Try to print with photo/best photo.

See Charge roller my be dirty or Catriges PCU Units

Depending on how many copies you have run, the drum as well as the cleaning blade needs to be replaced.  That should get rid of the gray band.

Replace the print head, and all should be just fine.

Hi Alms, Is there any chance you can post a scan of one of your faulty pages. This would help to assess the fault. If you print several pages, does the image move further and further down the page with each copy? Is the white band repeated down the page? If so measure the distance between each band - this will help identify the faulty component.