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HP LaserJet 4250 and 4350 Series Printers - Cleaning the Printer

Use the cleaning procedure on the following page every time you change the print cartridge or whenever print-quality problems occur. As much as possible, keep the printer free from dust and debris.

  • Clean the outside of the printer with a slightly water-dampened cloth.

  • Clean the inside with a dry, lint-free cloth.

Do not use ammonia-based cleaners on or around the printer. While cleaning the printer, be careful not to touch the transfer roller (the black, rubber roller located underneath the print cartridge). Skin oils on the roller can cause print-quality problems.
product illustration

Cleaning the inside of the printer

Use these steps to clean dust and residue from the inside of the printer.

To clean the inside of the printer

  1. Turn the printer power off and unplug the power cord.

    procedure illustration
  2. Open the top cover and remove the print cartridge.

    procedure illustration
    Avoid reaching too far into the printer. The adjacent fusing area might be hot.
    To prevent damage to the print cartridge, do not expose it to light for more than a few minutes. Cover the print cartridge with a sheet of paper while it is outside of the printer.
  3. Wipe any dust or dirt off the paper feed guides (shaded areas) with a dry, lint-free cloth.

    procedure illustration
    If toner gets on your clothing, wipe it off with a dry cloth and wash clothing in cold water. (Hot water sets toner into fabric.)
  4. Using the green handle, lift the paper-access plate and wipe off any residue with a dry, lint-free cloth.

    procedure illustration
  5. Reinstall the print cartridge, close the top cover, plug in the power cord, and turn the printer power on.

Cleaning the fuser

Run the printer cleaning page to keep the fuser free of toner and paper particles that can sometimes accumulate. Accumulation of toner and particles can cause specks to appear on the front or back side of your print jobs.

To ensure optimum print quality, HP recommends that you use the cleaning page every time you replace the print cartridge or on an automatic interval that you can set up. If you have an optional duplexer installed, you must run cleaning pages manually.

The cleaning procedure takes about 2.5 minutes to complete. A CLEANING message appears on the printer control panel display while the cleaning is taking place.

Running the cleaning page manually

In order for the cleaning page to work properly, print the page on copier-grade paper (not bond, heavy, or rough paper).
If a duplexer is installed. Remove the duplexer before beginning the cleaning cycle. The option will not appear in the printer control panel with the duplexer installed.

To run the cleaning page manually

  1. If a duplexer is installed, open the rear output bin.

  2. Press Menu to open the menus.

  3. Use Product illustrationProduct illustration (Up button) or Product illustrationProduct illustration (Down button) to scroll to CONFIGURE DEVICE , and then press Product illustrationProduct illustration (Select button).

  4. Use Product illustrationProduct illustration (Up button) or Product illustrationProduct illustration (Down button) to scroll to PRINT QUALITY , and then press Product illustrationProduct illustration (Select button).

  5. Use Product illustrationProduct illustration (Up button) or Product illustrationProduct illustration (Down button) to scroll to PROCESS CLEANING PAGE , and then press Product illustrationProduct illustration (Select button).

  6. If a duplexer is installed, close the rear output bin.

Running the cleaning page automatically

Using the procedure below, you can set the printer to print cleaning pages automatically at an interval that you select. In order for the cleaning page to run without intervention, you must keep the selected size and plain paper type available in the printer. The printer will not interrupt a printing job in process.

To run the cleaning page automatically

  1. Press Menu to open the menus.

  2. Use Product illustrationProduct illustration (Up button) or Product illustrationProduct illustration (Down button) to scroll to CONFIGURE DEVICE , and then press Product illustrationProduct illustration (Select button).

  3. Use Product illustrationProduct illustration (Up button) or Product illustrationProduct illustration (Down button) to scroll to PRINT QUALITY , and then press Product illustrationProduct illustration (Select button).

  4. Use Product illustrationProduct illustration (Up button) or Product illustrationProduct illustration (Down button) to scroll to AUTO CLEANING , and then press Product illustrationProduct illustration (Select button).

  5. Use Product illustrationProduct illustration (Up button) or Product illustrationProduct illustration (Down button) to scroll to ON , and then press Product illustrationProduct illustration (Select button).

  6. Use Product illustrationProduct illustration (Up button) or Product illustrationProduct illustration (Down button) to scroll to CLEANING INTERVAL , and then press Product illustrationProduct illustration (Select button).

  7. Use Product illustrationProduct illustration (Up button) or Product illustrationProduct illustration (Down button) to scroll to the desired interval between 1,000 and 20,000 pages, and then press Product illustrationProduct illustration (Select button) to save your selection.

  8. Use Product illustrationProduct illustration (Up button) or Product illustrationProduct illustration (Down button) to scroll to AUTO CLEANING SIZE , and then press Product illustrationProduct illustration (Select button).

  9. Use Product illustrationProduct illustration (Up button) or Product illustrationProduct illustration (Down button) to scroll to the paper size that you want the printer to use for cleaning pages (A4 or LETTER ), and then press Product illustrationProduct illustration (Select button) to save your selection.

The printer automatically prints a cleaning page at the interval and page size that you selected. You can discard the output page created by the cleaning process.

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