Lines gets added to scanned documents when using the document feeder

[PatD53]

I'm using the HP Printer Assistant App to scan documents. 

When I use the Document Feeder, thin vertical lines are added to the scanned image. 

No lines are added if I don't use the document feeder.

Is there a solution?

[Dragon-Fur]

@PatD53 

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The description of the problem sounds like the printer ADF needs attention (cleaning / maintenance).

If the dirt is on the outside..

Use a flashlight (torch in the UK); shine the light at an angle along the glass.

Clean, clean, clean.

Use a tiny brush to sweep all along the edges of the glass.

Next...

Steps provided in the order to be considered / completed:

Resolve scan quality problems on HP printers

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HP OfficeJet Pro 6978 All-in-One Printer 

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Question Resolved / Answered, Click "Accept as Solution"

[WyreNut · Accepted solution]

Look at slot #3 for paper/dirt.

Often a piece of paper will get  caught in slot #3....

WyreNut

[PatD53]

It wasn't a piece a paper.  I cleaned locations 3 & 2 and the lines disappeared.   Thank you.