Samsung SCX 6555N User Manual (ENGLISH) - Page 101
White Spots, Vertical lines, Color or Black, background, Toner smear, Vertical repetitive, defects - drum unit
UPC - 635753610314
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CONDITION White Spots SUGGESTED SOLUTIONS White spots appears on the page: • The paper is too rough and a lot of dirt from a paper falls to the inner devices within the machine, so the transfer roller may be dirty. Clean the inside of your machine. (See "Cleaning the transfer unit" on page 81.) Contact a service representative. • The paper path may need cleaning. Contact a service representative. Vertical lines Color or Black background Toner smear If black vertical streaks appear on the page: • The surface(drum part) of the imaging unit inside the machine has probably been scratched. Remove the imaging unit and install a new one. (See "Replacing the imaging unit" on page 84.) If white vertical streaks appear on the page: • The surface of the LSU part inside the machine may be dirty. Clean the LSU. Contact a service representative. If the amount of background shading becomes unacceptable: • Change to a lighter weight paper. (See "Specification on print media" on page 33.) • Check the environmental conditions: very dry conditions (low humidity) or a high level of humidity (higher than 80% RH) can increase the amount of background shading. • Remove the old imaging unit and then, install a new one. (See "Replacing the imaging unit" on page 84.) • Clean the inside of the machine. Contact a service representative. • Check the paper type and quality. (See "Specification on print media" on page 33.) • Remove the imaging unit and then, install a new one. (See "Replacing the imaging unit" on page 84.) CONDITION SUGGESTED SOLUTIONS Vertical repetitive defects If marks repeatedly appear on the printed side of the page at even intervals: • The imaging unit may be damaged. If a repetitive mark occurs on the page, run a cleaning sheet through several times to clean the cartridge; contact a service representative. After the printout, if you still have the same problems, remove the imaging unit and then, install a new one. (See "Replacing the imaging unit" on page 84.) • Parts of the machine may 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. • The fusing assembly may be damaged. Contact a service representative. Background scatter A 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 so that the paper does not absorb 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. • If background scatter covers the entire surface area of a printed page, adjust the print resolution through your software application or in printer properties. Misformed characters • If characters are improperly formed and producing hollow images, the paper stock may be too slick. Try different paper. (See "Specification on print media" on page 33.) • If characters are improperly formed and producing a wavy effect, the scanner unit may need service. Contact a service representative. Page skew • Ensure that the paper is loaded properly. • Check the paper type and quality. (See "Specification on print media" on page 33.) • Ensure that the paper or other material is loaded correctly and the guides are not too tight or too loose against the paper stack. 100 _Troubleshooting