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Archive for May, 2007

Improving The Print Quality On Your HP Printer

If you are having trouble with the quality of your printer, here are some things to try:

  • Redistribute the toner in the toner cartridge
  • Clean the inside of the printer
  • Adjust the print density
  • Check the paper type and quality
  • Replace the toner cartridge, then check the print quality again.

If a vertical white streak or faded area appears on the page:

  • The toner cartridge toner supply is could be low. Remove the toner cartridge from the printer and rotate it back and forth. If shaking the cartridge does not improve the print quality, replace the toner cartridge.
  • The print density might be set too light. Adjust the density adjustment setting from the control panel (1 is light; 5 is dark).

If sharp black vertical streaks appear on the page, the photosensitive drum inside the toner cartridge has probably been scratched. Replace the toner cartridge.

If smeared black vertical streaks appear, the fuser may be bad. Inspect the rollers for scratches and escessive wear, and, if necessary, replace the fusing assembly.

If there are areas that are faded-out:

  • The moisture content of the paper could be uneven, or the paper might have moist spots on its surface. Try paper from a different source.
  • The paper lot might be bad. The manufacturing process can cause some areas to reject toner. Try paper from a different source.
  • The transfer roller could be dirty. Replace the transfer roller

If toner smears appear on the leading edge of the paper, the paper guides might be dirty. Clean the printer.

If toner on the paper is loose or can be wiped off easily, your fuser may be damaged. See your service representative.

If the amount of background toner shading becomes unacceptable, try:

  • Increasing the density setting. This will decrease the amount of background shading.
  • Change the paper to a lighter basis weight.
  • Check the printer’s environment; very dry (low humidity) conditions can increase the amount of background shading.
  • Replace the toner cartridge
  • Replace the transfer roller (see ‘Transfer Roller’ in Chapter 7).

If marks appear repeatedly on the printed side of the page:

  • The toner cartridge could be damaged. The circumference of the toner cartridge drum is 3 3/4 inches (95 mm). If a repetitive mark occurs every 3 3/4 inches on the page, replace the toner cartridge.
  • The developer roller is defective. If a repetitive mark occurs every 2 inches (51 mm) on the page, replace the toner cartridge.
  • The charger roller in the toner cartridge is defective. If a horizontal black line occurs every 1 1/2 inches (38 mm), replace the toner cartridge.
  • The transfer roller has toner on it. If the defects occur every 2 1/6 inches (53 mm) on the black page, the problem will likely correct itself after a few more pages.

If characters are improperly formed, producing hollow characters, your paper stock mat be too slick. Try a different paper.

If characters are improperly formed, producing a wavy effect, the laser scanner needs service. Call your authorized HP dealer or HP service representative

If a vertical line appears on the page’s margin (usually the right margin) after printing about 10,000 pages, the drum in your toner cartridge is wearing out. The line will grow wider, with cross-hatching. Replace the toner cartridge. Shaking the cartridge will not temporarily relieve the problem.

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