Samsung SCX-4521FG manual Copying Problems

Condition	Suggested solutions
Back of	Check for leaking toner. Clean the inside of the machine.
printouts are See “Cleaning the Inside” on page 8.2.
dirty

Black pages	• The toner cartridge may not be installed properly.
	Remove the cartridge and reinsert it.

A	• The toner cartridge may be defective and need
	replacing. Remove the toner cartridge and install a new
	one. See “Replacing the Toner Cartridge” on page 8.4.
	• The machine may require repair. Contact a service
	representative.

Loose toner	• Clean the inside of the machine. See “Cleaning the
	Inside” on page 8.2.
	• Check the paper type and quality. See “Paper
	Specifications” on page 10.3.
	• Remove the toner cartridge and install a new one. See
	“Replacing the Toner Cartridge” on page 8.4.
	• If the problem persists, the machine may require
	repair. Contact a service representative.
Character	Character voids are white areas within parts of characters
Voids	that should be solid black:

	• If you are using transparencies, try another type of
A	transparency. Because of the composition of
	transparencies, some character voids are normal.
	• You may be printing on the wrong surface of the paper.
	Remove the paper and turn it around.
	• The paper may not meet paper specifications. See
	“Paper Specifications” on page 10.3.

Horizontal		If horizontally aligned black streaks or smears appear:
stripes		• The toner cartridge may be installed improperly.
		Remove the cartridge and reinsert it.
	AaBbCc	• The toner cartridge may be defective. Remove the
	AaBbCc	toner cartridge and install a new one. See “Replacing
	AaBbCc	the Toner Cartridge” on page 8.4.
	AaBbCc	• If the problem persists, the machine may require
	AaBbCc	repair. Contact a service representative.
Curl		If the printed paper is curled or paper does not feed into
		the machine:
		• Turn over the stack of paper in the tray. Also try
		rotating the paper 180° in the tray.

Copying Problems

Condition	Suggested solutions
Copies are too light or	Use the Darkness button to darken or lighten the
too dark.	background of the copies.
Smears, lines, marks,	• If defects are on the original, press the
or spots appears on	Darkness button to lighten the background of
copies.	your copies.
	• If no defects are on the original, clean the scan
	unit. See “Cleaning the Scan Unit” on page 8.3.
Copy image is skewed.	• Ensure that the original is face down on the
	document glass or face up in the ADF (Automatic
	Document Feeder).
	• Check that the copy paper is loaded correctly.
Blank copies print out.	Ensure that the original is face down on the
	document glass or face up in the ADF.
Image rubs off the	• Replace the paper in the tray with paper from a
copy easily.	new package.
	• In high humidity areas, do not leave paper in the
	machine for extended periods of time.
Frequent copy paper	• Fan the stack of paper, then turn it over in the
jams occur.	tray. Replace the paper in the tray with a fresh
	supply. Check/adjust the paper guides, if
	necessary.
	• Ensure that the paper is the proper paper
	weight. 20 lb (75 g/m2 bond) paper is
	recommended.
	• Check for copy paper or pieces of copy paper
	remaining in the machine after a paper jam has
	been cleared.
Toner cartridge	• Your originals may contain pictures, solids, or
produces fewer copies	heavy lines. For example, your originals may be
than expected before	forms, newsletters, books, or other documents
running out of toner.	that use more toner.
	• The machine may be turned on and off
	frequently.
	• The document cover may be left open while
	copies are being made.

9.10 Troubleshooting