Samsung SCX-4720FN

ROUBLESHOOTING

9.21

Toner smear

• Clean the inside of the machine. See “Cleaning the Inside”

on page 8.3.

• Check the paper type and quality. See “Paper

Specifications” on page D.6.

• Remove the toner cartridge and install a new one. See

“Replacing the Toner Cartridge” on page 8.8.

Vertical repetitive

defects

If marks repeatedly appear on the printed side of the page at

even intervals:

• The toner cartridge may be damaged. If a repetitive mark

occurs on the page, print a cleaning sheet several times to

clean the cartridge; see “Cleaning the Drum” on

page 8.10. After the printout, if you still have the same

problems, remove the toner cartridge and install a new

one. See “Replacing the Toner Cartridge” on page 8.8.

• 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.

• If you use inferior quality paper;see “Cleaning the Drum”

on page 8.10.

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 the printer properties.

Misformed

characters

• If characters are improperly formed and producing hollow

images, the paper stock may be too slick. Try a different

paper. See “Paper Specifications” on page D.6.

• If characters are improperly formed and producing a wavy

effect, the scanner unit may need service. For service,

contact a service representative.

Condition Suggested solutions

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