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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.
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.
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
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. Amessage 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
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
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.