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HP PageWide Pro 750, MFP 772, 777 - Cleaning routines

Clean the printhead
During the printing process, paper and dust particles can accumulate inside the product. Over time, this buildup can cause print-quality problems such as specks or smearing.
This product automatically services itself, running cleaning routines that can correct most of these problems.
For problems that the product cannot automatically solve, use the following routine to clean the printhead:
  note:
Use this routine only to correct print quality errors. Do not use it for periodic maintenance.
  1. On the control panel, touch the Support Tools icon.
  2. In the display, touch the Troubleshooting icon, and then Print Quality.
  3. Touch Tools, and then Clean the Printhead.
  4. Follow the prompts on the control panel.
    A page feeds through the product slowly. Discard the page when the process is completed.
Clean the scanner glass strip and platen
Over time, specks of debris collect on the scanner glass and white plastic backing, which can affect performance. Use the following procedure to clean the scanner glass and white plastic backing:
  1. Turn off the product, and then disconnect the power cord from the product.
  2. Open the scanner lid.
  3. Clean the scanner glass and the white plastic backing with a soft cloth or sponge that has been moistened with nonabrasive glass cleaner.
      note:
    Do not use abrasives, acetone, benzene, ammonia, ethyl alcohol, or carbon tetrachloride on any part of the product; these can damage the product. Do not place liquids directly on the glass or platen. They might seep and damage the product.
  4. Dry the glass and white plastic backing with a chamois or a cellulose sponge to prevent spotting.
  5. Reconnect the power cord to the product, and then power the product on.
Clean the document feeder pick rollers and separation pad
If the product document feeder experiences paper-handling problems, such as jams or multiple-page feeds, clean the document feeder rollers and separation pad.
  1. Open the document feeder cover.
  2. Use a moist, lint-free cloth to wipe both pick rollers and the separation pad to remove dirt.
  3. Close the document feeder cover.
Clean the touch screen
Clean the touch screen whenever it is necessary to remove fingerprints or dust. Wipe the touch screen gently with a clean, water-dampened, lint-free cloth.
  note:
Use water only. Solvents or cleaners can damage the touch screen. Do not pour or spray water directly onto the touch screen.

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