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Message 1 of 18
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Solved!

HP Officejet Pro 8620 is showing a black line on scanned items

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I have an Officejet Pro 8620. Just purchased it two months ago and everything has been fine. I just, however, scanned an item through the feeder, and there is a black verticle line about halfway in, going down the entire page. What can I do to correct this? It is not happening as of yet using the flatbed.

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The issue you are seeing is caused by a small spec on the ADF scanner glass, the thin glass just to the left of the main bed.  [Oops - the original document has been removed....]

 

The same sensor is used for both the flatbed scan and the automatic document feeder (ADF), the difference is where the sensor is moved to for scanning.  When scanning from the flatbed the sensor moves across the bed, a spot in this area will result in a spot on the page.  When using the ADF the sensor is moved to the thin glass to the left of the main bed, and the paper is moved past the sensor by the ADF.  A spot in the wrong place here will result in a lind down the length of the long side of the page.  Clean this areas as shown below.

 

 

Figure : Locate any debris on the ADF scanner glass strip

Image: Locate debris on  the ADF scanner glass strip.

 

If the initial cleaning does not resolve the issue it may help to shine a bright flashlight nearly parallel to the glass.  For a line on the left side of the printed page the spot will be toward the front of the printer, if the line is on the right of the paper it will correspond to a spec toward the rear of the printer.

 

 

Figure : Clean the ADF scanner glass strip
Image: Locate debris on  the ADF scanner glass strip.

Bob Headrick,  HP Expert

I am not an employee of HP, I am a volunteer posting here on my own time.

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After two days of going nuts cleaning everything to finding out why the black lines were not going away, the Flashlight worked, the spec was so tiny, I couldn't beleive it.  The black lines are gone.  Thanks to this HP Forum.

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Doesn't seem to work for me as each time I clean, the lines appear in different places. Also, adf and flatbead scanning outputs different quality. ADF=more noise+vertical lines, Flatbed=noise almost non-existent, richer and over-saturated output.

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It worked..............

I cannot beleive it.  I cleaned it twice before reading the blog.  With the flashlight I found a tiny spec and buffed it off.  That did the trick.   Works great.  Thannnnnnnnnnnnks. 

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I returned the sucker. Found out more flaws where most people wouldn't care about.

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Message 7 of 18
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Cannot remove lines from scanned docs.  How is it done?

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@AmLaw wrote:

Cannot remove lines from scanned docs.  How is it done?


Do the lines only show up when you use the ADF (not from the flatbed glass)?  If so then clean the glass to the left of the main scanner glass as described in my solution above.

 


Bob Headrick,  HP Expert

I am not an employee of HP, I am a volunteer posting here on my own time.

If your problem is solved please click the "Accept as Solution" button 

If my answer was helpful please click the "Thumbs Up" to say "Thank You"

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Cleaning glass to the left of the scan bed worked.  Simple fix.  Thanks.

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I have a black and red line on my printer on the feeder not the flatbed. Can you tell me how to clean that?

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