Getting vertical lines on scans and copies when being done through document scanner despite cleaning

[EricFOBGYN]

Copying and Scanning from document feeder results in 2 vertical lines on the documents. Cleaning protocols of the components have been followed without resolution of the problem.

[Repairatrooper]

Sometimes you can have barely visible adhesive residue, have you laid the defect page next to the glass to better locate where on the glass the defect is coming from?  Using a bright flashlight can help to show these barely visible contaminants. It can sometimes be very frustrating getting rid of some debris. Do you get any defects from the flat bed glass?

[EricFOBGYN]

Copies and scans on the glass are fine. Vertical lines only appear with use of document feeder and all parts have been cleaned.

[Repairatrooper]

Can you post a sample? If scans from glass are good you either have an electronic issue or something up with the slit glass. Any scratches on the glass? I have had customers feed staples through and scratch the glass and that is a game ender as there is no fix for that.

[EricFOBGYN]

Here are samples from document feeder, then scanner glass.  Ido not see any defect on the surfaces I can view.  Any suggestions?  Thanks for any help you can give. 

[CurveBuster]

 Notice the black vertical line on a page that I scanned in through the ADF.  Interesting when I use the ADF for a 2 sided copy, only page 1 has the vertical line, page 2 looks fine (no vertical Line)