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HP Officejet Pro L7300 and L7500 All-in-One Series - Horizontal Lines on a Copy

Issue
Horizontal lines appear in a copy printed from the automatic document feeder (ADF) or the flatbed scanner.
Solution
The scanner glass, ADF lid backing, or ADF frame might need cleaning. Follow the given instructions to clean the All-in-One.
Solution one: Clean the scanner glass
To clean the scanner glass:
  1. Turn off the device.
  2. Lift the ADF.
  3. Clean the glass using a soft, lint-free cloth that has been sprayed with a mild glass cleaner. Dry the glass with a dry, soft, lint-free cloth.
    Figure : Clean the glass
  caution:
Use only glass cleaner to clean the scanner glass. Avoid cleaners that contain abrasives, acetone, benzene, and carbon tetrachloride, all of which can damage the scanner glass. Avoid isopropyl alcohol because it can leave streaks on the glass.
  caution:
Do not spray the glass cleaner directly on the glass. If too much glass cleaner is applied, the cleaner could leak under the glass and damage the scanner.
Solution two: Clean the automatic document feeder (ADF)
The ADF requires periodic cleaning depending on the amount of use and the type of paper that is fed through it. If you use the ADF several times a week, monthly cleaning is recommended. Set up a cleaning routine that is appropriate for the device. If streaks exist on scanned documents, cleaning the ADF frame might solve the problem.
To clean the ADF:
  1. Turn off the device.
  2. Lift the ADF.
    Figure : Lift the ADF
  3. Locate the ADF frame on the underside of the ADF.
    Figure : Locate the ADF frame
  4. Press the ADF frame release.
    Figure : Press the frame release
  5. Unhook and remove the ADF frame.
    Figure : Unhook and remove the frame
  6. Clean the ADF frame using a soft, lint-free cloth that has been sprayed with a mild glass cleaner. Clean both sides of the transparent film, including the white strip on the inside of the ADF frame.
    Figure : Clean the frame
      caution:
    Use only glass cleaner. Avoid cleaners that contain abrasives, acetone, benzene, and carbon tetrachloride, all of which can damage the ADF frame. Avoid isopropyl alcohol because it can leave streaks.
  7. Follow these steps to replace the ADF frame:
    1. Lift the ADF lid backing, and then hook the ADF frame into the ADF lid.
      Figure : Lift the lid backing and hook the frame into the lid
    2. Slide the ADF frame under the backing, and then snap it into place.
      Figure : Slide the frame
  8. Close the ADF and then turn on the device.
Solution three: Clean the automatic document feeder (ADF) lid backing
Follow the given steps to clean the lid backing:
  1. Turn off the device.
  2. Lift the ADF.
  3. Clean the white ADF lid backing by using a soft, lint-free cloth that has been sprayed with a mild glass cleaner. Wash the backing gently to loosen debris; do not scrub the backing.
    Figure : Clean the lid backing
  4. Dry the backing with a dry, soft, lint-free cloth.
      caution:
    Do not use paper based wipes, because these might scratch the backing.
  5. If this does not clean the backing thoroughly, repeat the previous steps using isopropyl (rubbing) alcohol. Wipe the backing with a damp cloth to remove any residual alcohol, and then dry the backing with a dry, soft, lint-free cloth.
  6. Close the ADF and then turn on the device.
Cause
Dust or dirt on the scanner glass, ADF lid backing, or ADF frame can slow down performance, degrade the quality of scans, and affect the accuracy of special features such as fitting copies to a certain page size.

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