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HP Printers - Improving Scan Quality

This document is for HP multifunction printers.
When you scan, the computer file or printed output has vertical lines, incorrect colors, color bands, or poor resolution.
Examples of poor scan quality
Examples of poor scan quality

Step 1: Confirm the issue is not printing-related

The steps in this document resolve quality issues when scanning only.
If quality issues occur when printing from the computer, do not continue with these steps. Go to HP Customer Support, type your printer model number if necessary, then search for print quality to find the Fixing Poor Print Quality document for steps to resolve the issue.
If quality issues occur when scanning, continue to the next step.

Step 2: Clean the scanner

Fingerprints, smudges, dust, or debris on the scanner glass, under the scanner lid, or in the document feed slot can cause lines and color bands. Clean these parts with a soft, lint-free cloth sprayed with glass cleaner.
Read one of the following sections for steps to clean these components, depending on your printer type.
Printer with flatbed scanner glass and lid
Printer with a document scan feeder
Printer with flatbed scanner glass
Printer with a document feeder

Step 3: Reset the printer

Resetting the printer can force some types of scanners to calibrate, which might fix the problem.
  1. Remove any items from the scanner glass and automatic document feeder (ADF), then close the scanner lid.
  2. With the printer turned on, disconnect the power cord from the printer and from the wall outlet or power strip.
  3. Wait at least 60 seconds.
  4. Plug the power cord back into a wall outlet.
    HP recommends connecting the printer power cord directly to a wall outlet.
  5. Reconnect the power cord to the printer.
  6. If you have an HP DeskJet 3700 series printer, calibrate the scanner after resetting the printer.
  7. Load the original document or photo, then try to scan.
    If the issue persists, continue to the next step.

Step 4: Clean the automatic document feeder (ADF) rollers

If your printer has an automatic document feeder (ADF), dust or paper residue on the rollers or separator pad inside the ADF can result in scan quality issues. Open the ADF, then clean the ADF rollers and separator pad.
The location of the ADF rollers might be different depending on your printer, but the following steps still apply.
  1. Gather the following materials:
    • A clean, lint-free cloth, or any cloth that does not come apart or leave fibers
    • Distilled, filtered, or bottled water (tap water might damage the printer)
  2. Remove the original document from the ADF.
  3. Turn off the printer.
  4. Disconnect the power cord from the rear of the printer.
  5. Open the ADF cover.
  6. Find the paper pick rollers and the separator pad inside the ADF.
    Figure : Example of the paper pick rollers and separator pad in a LaserJet printer
    The paper pick rollers and separator pad
    Figure : Example of the paper pick rollers and separator pad in a OfficeJet printer
  7. Lightly dampen a clean, lint-free cloth with filtered or distilled water, then squeeze any excess liquid from the cloth.
  8. Use the damp cloth to wipe any residue off the paper pick rollers and the separator pad.
  9. Leave the ADF cover open for two minutes to allow the paper pick rollers and separator pad to dry.
  10. Close the ADF cover.
  11. Reload the original document print side up in the document feeder tray. Gently slide the document into the printer as far as it can go.
  12. Slide in the paper width guides until they are snug against the paper.
    Do not push the paper width guides in so far that they bend the paper.
  13. Reconnect the power cord to the rear of the printer.
  14. Turn on the printer, then try to scan.
If the issue persists, continue to the next step.

Step 5: Change the scan settings

Change the scan settings to increase resolution, adjust the color palette, or increase the contrast.

Step 6: Service or replace the printer

Service or replace your HP product if the issue persists after completing all the preceding steps.
Go to Contact HP Customer Support to schedule a product repair or replacement. If you are in Asia Pacific, you will be directed to a local service center in your area.
To confirm your warranty status, go to HP Product Warranty Check. Repair fees might apply for out-of-warranty products.






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