Samsung ML-2010 Series If black vertical streaks appear on, If white vertical streaks appear on

Problem	Solution
Vertical lines	If black vertical streaks appear on the page:
	• The drum inside the toner cartridge has probably been
	scratched. Install a new toner cartridge.
	If white vertical streaks appear on the page:
	• The surface of the LSU part inside the machine may be
	dirty. Clean the LSU. See “Cleaning the Inside” on
	page 4.6. Contact your service representative.
Gray background	If the amount of background shading becomes
	unacceptable, the procedures below may fix the problem.
	• Change to a lighter weight pages. See “Paper
	Specifications” on page 6.3.
	• Check the printer’s environment; very dry (low humidity)
	or high humidity (higher than 80% RH) conditions can
	increase the amount of background shading.
	• Remove the old toner cartridge and install a new one. See
	“Installing the Toner Cartridge” on page 2.4.
Toner smear	• Clean the inside of the printer. See “Cleaning the Inside”
	on page 4.6.
	• Check the paper type and quality. See “Paper
	Specifications” on page 6.3.
	• Remove the toner cartridge and install a new one. See
	“Installing the Toner Cartridge” on page 2.4.
Vertical repetitive	If marks repeatedly appear on the printed side of the page
defects	at even intervals:
	• The toner cartridge may be damaged. Clean the inside of
	the printer. See “Cleaning the Inside” on page 4.6. After
	cleaning the inside of the printer, if you still have the same
	problems, install a new toner cartridge. See “Installing the
	Toner Cartridge” on page 2.4.
	• Parts of the printer 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.

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SOLVING PROBLEMS 5.13