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HP LaserJet 4000, 4050, and 4100 Series Printers - Cleaning and Maintaining the Printer

Overview

This document explains basic printer maintenance.

  • Managing the print cartridge.

  • Cleaning the printer.

    NOTE: To ensure optimum print quality, the printer will prompt for routine maintenance performed every 200,000 pages when the Perform printer maintenance message appears on the control panel. The Maintenance Kit can be purchased from a local authorized HP dealer and is user installable or click here to order the maintenance kit from the HP Parts store at http://www.hp.com/buy/parts.

If the printer has print quality defects that are not resolved after using the information in this document then CLICK HERE to view and download the HP LaserJet 4100 User Guide. It contains more comprehensive troubleshooting information.

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Managing the print cartridge

HP policy on non-HP print cartridges

The Hewlett-Packard Company cannot recommend use of non-HP print cartridges, either new or remanufactured. Because they are not HP products, HP cannot influence their design or control their quality.

To install a new HP print cartridge and recycle the used cartridge, follow the instructions included in the print cartridge box.

print cartridge storage

Leave the print cartridge in its package until ready to use.

CAUTION: To prevent damage to the print cartridge, do not expose it to light for more than a few minutes.

print cartridge life expectancy

The life of the print cartridge depends on the amount of toner that print jobs require. When printing text at five-percent coverage, an HP print cartridge lasts an average of 10,000 or 6,000 pages, depending on which print cartridge is installed (A typical business letter is about five-percent coverage). This assumes that Toner density = 3 and Economode = off is set in the Print Quality menu on the printer’s control panel (These are the default settings).

Continue printing when toner is low

When toner is low, the printer’s control panel displays the message, Toner low .

  • If the Toner low message appears, but the printer continues printing, then Toner low = continue is set in the Configuration menu on the printer’s control panel.

  • If the printer stops printing when low toner is detected, then Toner low = stop is set in the Configuration menu on the printer’s control panel. To resume printing, press the GO button.

The printer will continue to display, Toner low , until the print cartridge is replaced.

Redistributing the toner

Redistribute the toner when it is low, faded or when light areas appear on a printed page. Temporarily improve print quality by redistributing the toner. The following procedure might allow a current print job to finish printing before replacing the print cartridge.

  1. Open the top cover.

  2. Remove the print cartridge from the printer.

    WARNING: Avoid reaching too far into the printer. The adjacent fusing area might be hot!
    CAUTION: To prevent damage to the print cartridge, do not expose it to light for more than a few minutes.
  3. Gently shake the print cartridge from side to side to redistribute the toner.

    NOTE: If toner gets on clothing, wipe it off with a dry cloth, and wash the clothing in cold water (Hot water sets toner into fabric).
  4. Reinsert the print cartridge into the printer, and close the top cover.

    If the print remains light, install a new print cartridge (Follow the instructions provided with the new print cartridge).

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Cleaning the printer

To maintain print quality, follow the cleaning procedure below every time the print cartridge is changed 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.

    CAUTION: 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 shown in Figure 1). Skin oils on the roller can cause print quality problems.

Figure 1: Avoid touching the transfer roller.

Cleaning procedure

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

  2. Open the top-cover, and remove the print cartridge.

    WARNING: Avoid reaching too far into the printer. The adjacent fusing area might be hot!
    CAUTION: To prevent damage to the print cartridge, do not expose it to light for more than a few minutes.
  3. Wipe any dust or dirt from the paper feed guides (Figure 2) with a dry lint-free cloth.

    Figure 2: Paper feed guides.

    NOTE: If toner gets on your clothing, wipe it off with a dry cloth, and wash the clothing in cold water (Hot water sets toner into fabric).
  4. Using the green handle, lift the paper access plate (Figure 3), and wipe off any residue with a dry lint-free cloth.

    Figure 3: Lifting the paper access plate.

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

    NOTE: On the HP LaserJet 4050 printer, if the message, New print cartridge = no , appears, ignore the message when removing the print cartridge to clean the printer.

Cleaning spilled toner

Defective print cartridges can develop leaks. Also, after a paper jam has occurred, there may be some toner remaining on the rollers and guides inside the printer. The pages that print immediately after the jam may pick up this toner.

Clean spilled toner with a cloth dampened with cold water.

Using the printer cleaning page

If toner specks appear on the front or backsides of print jobs, follow the procedure below.

From the printer’s control panel, do the following:

  1. Press MENU until Print quality menu appears.

  2. Press ITEM until Create cleaning page appears.

  3. Press SELECT to create the cleaning page.

  4. Follow the instructions on the cleaning page to complete the cleaning process

    NOTE: For the cleaning page to work properly, print the page on copier grade paper (not bond or rough paper).

    Cleaning page instructions

    1. Remove all paper from Tray 1.

    2. Press the MENU button on the printer control panel until Print quality menu appears in the printer display.

    3. Press the ITEM key until Process cleaning page appears.

    4. Press the SELECT key.

    5. Load the cleaning page with the black stripe face down in Tray 1. Once the paper is loaded in Tray 1, the printer will complete the cleaning process.

  5. Create a cleaning page more than once. When toner is cleaned from inside the printer, shiny black spots will appear on the page’s black strip.

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Frequency

To ensure good print quality with certain types of paper, use the cleaning page procedure every time the print cartridge is replaced. If the cleaning page procedure is frequently needed, try a different type of paper.

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