HP 6510 Prints black with horizontal gray streaks and print is faded.

[Sensuari]

HP 6510 Prints black with horizontal gray streaks and print is faded.  The horizontal lines print about every 3/4" down the page.  I ran "Clean Printhead" 8 times and it would very slightly improve with each run but still is impossible to read in some areas.  Not great for printing online shipping label.  Also ran the "Printer Quality Report" with same results although with both the "Clean Prinhead" report & the "Printer Quality Report", the only color affected was Black.  None of the other colors did this.  I finally resorted to converting the PDF shipping Label to a JPG and then changing the color of the JPG text to Dark Blue.  When I printed the JPG there was still some slightly faint horizontal fading lines but it was readable.  

Any suggestions of what is wrong and how to fix these faded horizontal lines for Black?

Thank you for your comments!

Cheers,

  Sensuari

[Betty0610]

@Sensuari

Welcome to the HP Support Community.

On the product control panel, touch OK. The alignment page prints.

If the product does not automatically print an alignment page, follow these steps:

1. From the home screen, touch the Setup icon (), and then touch Tools.

2. Touch the Down Arrow (), and then touch Align Printer. The alignment page prints.

If the issue persists, please perform the remaining steps from this document: https://support.hp.com/us-en/product/hp-photosmart-6510-e-all-in-one-printer-series-b211/5058334/mod...

Let me know if this helps.

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Thanks!

Have a great day!