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Samsung Laser Printers - Printing Quality Problems

If the inside of the printer is dirty, or paper has been loaded improperly, there might be a reduction in print quality.
See the table below to clear problems described.
Condition
Suggested solutions
Light or faded print
  • If a vertical white streak or faded area appears on the page, the toner supply is low. Install a new toner cartridge (see "Replacing the toner cartridge" in the printer User Guide).
  • The paper might not meet paper specifications; for example, the paper might be too moist or rough.
  • If the entire page is light, the print resolution setting is too low or the toner save mode is on. Adjust the print resolution and turn the toner save mode Off. See the help screen of the printer driver.
  • A combination of faded or smeared defects might indicate that the toner cartridge needs cleaning. Clean the inside of your printer (see "Clean the printer" in the printer User Guide).
  • The surface of the LSU part, inside the printer, might be dirty. Clean the inside of your printer (see "Clean the printer" in the printer User Guide).
If these steps do not correct the problem, contact a service representative.
The top half of the paper is printed lighter than the rest of the paper
The toner might not adhere properly to this type of paper.
  • Change the printer option and try again. Go to Printing Preferences, click the Paper tab, and then set the paper type to Recycled (see "Opening printing preferences" in the printer User Guide).
Toner specks
  • The paper might not meet specifications; for example, the paper might be too moist or rough.
  • The transfer roller might be dirty. Clean the inside of your printer (see "Cleaning the printer" in the printer User Guide).
  • The paper path might need cleaning (see "Cleaning the printer" in the printer User Guide).
If these steps do not correct the problem, contact a service representative.
Dropouts
If faded areas, generally rounded, occur randomly on the page:
  • A single sheet of paper might be defective. Try reprinting the job.
  • The moisture content of the paper is uneven, or the paper has moist spots on the surface. Try a different brand of paper.
  • The paper lot is bad. The manufacturing processes can cause some areas to reject toner. Try a different kind or brand of paper.
  • Change the printer option and try again. Go to Printing Preferences, click the Paper tab, and then set type to Thick or Thicker (see "Opening printer preferences" in the printer User Guide).
If these steps do not correct the problem, contact a service representative.
White spots
If white spots appear on the page:
  • The paper is too rough and a lot of dirt from paper falls on the components inside the printer, so the transfer roller might be dirty. Clean the inside of the printer (see "Cleaning the printer" in the printer User Guide).
  • The paper path might need cleaning. Clean the inside of your printer (see "Cleaning the printer" in the printer User Guide).
If these steps do not correct the problem, contact a service representative.
Vertical lines
If black vertical streaks appear on the page:
  • The surface (drum part) of the imaging unit, inside the printer, has probably been scratched. Remove the imaging unit and install a new one (see "Replacing the imaging unit" in the printer User Guide).
If white vertical streaks appear on the page:
  • The surface of the LSU part, inside the printer, might be dirty. Clean the inside of the printer (see "Cleaning the printer" in the printer User Guide).
If vertical streaks appear on the page:
  • The surface of the scanner glass, and its white sheet, might be dirty (see "Cleaning the printer" in the printer User Guide).
If these steps do not correct the problem, contact a service representative.
Black or color background
If the amount of background shading becomes unacceptable:
  • Change to a lighter weight paper.
  • Check the environmental conditions: very dry conditions, or a high level of humidity (higher than 80% RH), can increase the amount of background shading.
  • Remove the old toner cartridge and install a new one (see "Replacing the toner cartridge" in the printer User Guide).
  • Thoroughly redistribute the toner (see "Redistributing toner" in the printer User Guide).
  • Change the image transfer belt if it has reached its lifespan. Contact a service representative.
Toner smear
  • Check the paper type and quality.
  • Clean the inside of the printer (see "Cleaning the printer" in the printer User Guide).
  • Remove the toner cartridge and install a new one (see "Replacing the toner cartridge" in the printer User Guide).
  • If the problem persists, remove the imaging unit and install a new one (see "Replacing the imaging unit" in the printer User Guide).
  • Change the image transfer belt if it has reached its lifespan. Contact a service representative.
Vertical repetitive defects
If marks repeatedly appear on the printed side of the page at even intervals:
  • Parts of the printer might have toner on them. If the defects occur on the back of the page, the problem will likely correct itself after a few more pages.
  • If the problem persists, the toner cartridge might be damaged. Remove the toner cartridge and install a new one (see "Replacing the toner cartridge" in the printer User Guide).
  • If the problem persists, the imaging unit might be damaged. If a repetitive mark occurs on the page, run a cleaning sheet through several times to clean the imaging unit. Clean the inside of the printer (see "Cleaning the printer" in the printer User Guide). If you still have the same problem, remove the imaging unit and install a new one (see "Replacing the imaging unit" in the printer User Guide).
  • If the problem persists, the fusing assembly may be damaged. Contact a service representative.
Background scatter
Background scatter results from bits of toner randomly distributed on the printed page.
  • The paper may be too damp. Try printing with a different batch of paper. Do not open packages of paper until necessary to prevent paper from absorbing too much moisture.
  • If background scatter occurs on an envelope, change the printing layout to avoid printing over areas that have overlapping seams on the reverse side. Printing on seams can cause problems.
    Or select Thick from the Printing Preferences window (see "Opening printer preferences" in the printer User Guide).
  • If background scatter covers the entire surface area of a printed page, adjust the print resolution through your software application or in Printing Preferences (see "Opening printer preferences" in the printer User Guide). Make sure the correct paper type is selected. For example: if Thicker Paper is selected, but Plain Paper is actually used, an overcharging can occur causing this printing quality problem.
  • If you are using a new toner cartridge, redistribute the toner first (see "Redistributing toner" in the printer User Guide).
Toner particles are around bold characters or pictures
The toner might not adhere properly to this type of paper.
  • Change the printer option and try again. Go to Printing Preferences, click the Paper tab, and then set the paper type to Recycled (see "Opening printer preferences" in the printer User Guide).
  • Make sure the correct paper type is selected. For example: if Thicker Paper is selected, but Plain Paper is actually used, an overcharging can occur causing this printing quality problem.
Misformed characters
  • If characters are improperly formed and producing hollow images, the paper stock may be too slick. Try different paper.
Page skew
  • Make sure that the paper is loaded properly.
  • Check the paper type and quality.
  • Make sure that the guides are not too tight, or too loose, against the paper stack.
Curl or wave
  • Make sure that the paper is loaded properly.
  • Check the paper type and quality. Both high temperature and humidity can cause paper curl.
  • Turn the stack of paper over in the tray. Also try rotating the paper 180° in the tray.
Wrinkles or creases
  • Make sure that the paper is loaded properly.
  • Check the paper type and quality.
  • Turn the stack of paper over in the tray. Also try rotating the paper 180° in the tray.
Back of printouts are dirty
  • Check for leaking toner. Clean the inside of the printer (see "Cleaning the printer" in the printer User Guide).
Solid color or black pages
  • The toner cartridge might not be installed properly. Remove the cartridge and reinsert it.
  • The toner cartridge might be defective. Remove the toner cartridge and install a new one (see "Replacing the toner cartridge" in the printer User Guide).
  • If the problem persists, the imaging unit might not be installed properly. Remove the imaging unit and reinsert it.
  • If the problem persists, the imaging unit might be defective. Remove the imaging unit and install a new one (see "Replacing the imaging unit" in the printer User Guide).
  • The printer might require repair. Contact a service representative.
Loose toner
  • Check the paper type, thickness, and quality.
  • Clean the inside of the printer (see "Cleaning the printer" in the printer User Guide).
  • Remove the toner cartridge, and then install a new one (see "Replacing the toner cartridge" in the printer User Guide).
  • If the problem persists, remove the imaging unit, and then install a new one (see "Replacing the imaging unit" in the printer User Guide).
If these steps do not correct the problem, the printer might require repair. Contact a service representative.
Character voids
Character voids are white areas within parts of characters that should be solid black:
  • You might be printing on the wrong surface of the paper. Remove the paper and turn it over.
  • The paper might not meet paper specifications.
Horizontal stripes
If horizontally aligned black streaks or smears appear:
  • The toner cartridge might be installed improperly. Remove the cartridge and reinsert it.
  • The toner cartridge might be defective. Remove the toner cartridge and install a new one (see "Replacing the toner cartridge" in the printer User Guide).
  • If the problem persists, the imaging unit might be installed improperly. Remove the imaging unit and reinsert it.
  • If the problem persists, the imaging unit might be defective. Remove the imaging unit and install a new one (see "Replacing the imaging unit" in the printer User Guide).
If these steps do not correct the problem, the printer might require repair. Contact a service representative.
Curl
If the printed paper is curled, or the paper does not feed into the printer:
  • Turn the stack of paper over in the tray. Also try rotating the paper 180° in the tray.
  • Change the printer's paper option and try again. Go to Printing Preferences, click the Paper tab, and then set type to Thin (see "Opening printer preferences" in the printer User Guide).
  • An unknown image repetitively appears on a few sheets
  • Loose toner
  • Light print or contamination occurs
Your printer is probably being used at an altitude of 1,000 m (3,281 ft) or above.
The high altitude might affect the print quality, such as loose toner or light imaging. Change the altitude setting for your printer (see "Altitude adjustment" in the printer User Guide).

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