Samsung CLX-8540ND Condition Suggested solutions White Spots, Vertical lines, Color or Black

	Condition		Suggested solutions
White Spots		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.
			(Page 13.2) Contact a service
			representative.
		•	The paper path may need cleaning. Contact
			a service representative.
Vertical lines		If black vertical streaks appear on the page:
		•	The drum inside the printer has probably
			been scratched. Remove the imaging unit
			and install a new one. (Page 13.6)
		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.
		•	The inside of the Imaging Unit may be dirty.
			Change the Imaging Unit.
		If vertical streaks appear on the page:
		•	The surface of the scanner glass and its
			white sheet may be dirty. Clean these unit.
			See 13.2 . If this problem persists, contact a
			service representative.
Color or Black		If the amount of background shading becomes
background		unacceptable:
		•	Change the IBT if it has reached its lifespan.
		•	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. (Page 13.4)
Toner smear		•	Clean the inside of the machine. Contact a
			service representative.
		•	Check the paper type and quality.
			(Page 4.3)
		•	Remove the imaging unit and then, install a
			new one. (Page 13.4)
		•	Change the IBT if it has reached its lifespan.

Condition	Suggested solutions
Vertical repetitive	If marks repeatedly appear on the printed side
defects	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. (Page 13.4)

•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 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	•	If characters are improperly formed and
characters		producing hollow images, the paper stock
		may be too slick. Try different paper.
		(Page 4.3)
	•	If characters are improperly formed and
		producing a wavy effect, the scanner unit
		may need service. Contact a service
		representative.

14.17 <Troubleshooting>