Samsung CLP-550N setup guide Problem Solution

		Problem	Solution
Vertical lines			If black vertical streaks appear on the page:
			• The imaging unit inside the printer has probably been
		AaBbCc
			scratched. Install a new imaging unit.
		AaBbCc	If white vertical lines appear on the page:
		AaBbCc
			• The Laser Scanner window has probably been contaminated.
		AaBbCc
			Clean the Laser Scanner window. Holding the end of the
		AaBbCc
			cleaner, slide it in and out several times. See “Cleaning the
			LSU Inside the Printer” on page 6.30.
Color or Black			If the amount of background shading becomes unacceptable,
background			the procedures below may fix the problem.
			• Change to lighter weight pages. See “Paper Specifications” on
	AaBbCc		page G.4.
	AaBbCc		• Check the printer’s environment; very dry (low humidity) or
	AaBbCc		high humidity (higher than 80% RH) conditions can increase
			the amount of background shading.
	AaBbCc
			• Remove the old imaging unit and install a new one. See
	AaBbCc		“Replacing the Imaging Unit” on page 6.14.
Toner smear			• Clean the inside of the printer. See “Cleaning the Inside of the
			Printer” on page 6.31
			• Check the paper type and quality. See “Paper Specifications”
			on page G.4.
			• Remove the transfer belt and install a new one. See “Replacing
			the Transfer Belt” on page 6.22.

Vertical repetitive		If marks repeatedly appear on the printed side of the page at
	defects	even intervals:
		• Clean the inside of the printer. See “Cleaning the Inside of the
	AaBbCc	Printer” on page 6.31. After cleaning the inside of the printer,
	AaBbCc	if you still have the same problems, install a new toner
	AaBbCc	cartridge of the defected color. See “Replacing the Toner
		Cartridges” on page 6.8.
	AaBbCc	• Parts of the printer may have toner on them. If the defects
	AaBbCc	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.

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SOLVING PROBLEMS 7.23