Sharp ML-4550 Condition Suggested solutions Vertical, Repetitive, Defects, Scatter, Misformed

Condition

Suggested solutions

Vertical

If marks repeatedly appear on the printed side of

repetitive

the page at even intervals:

defects

•

The toner cartridge may be damaged. If a

AaBbC c

repetitive mark occurs on the page, print a

cleaning sheet several times to clean the

AaBbC c

cartridge; see page 8.3. After the printout, if

AaBbC c

you still have the same problems, install a new

AaBbC c

•

toner cartridge. See page 8.5.

AaBbC c

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.

Background

Background scatter results from bits of toner

scatter

distributed on the printed page.

A

•

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.

Misformed

•

If characters are improperly formed and

characters

producing hollowed images, the paper stock

may be too slick. Try a different paper. See

page 5.3.

•

If characters are improperly formed and

producing a wavy effect, the scanner unit may

need service. Verify that it also occurs on a

demo page (see page 2.8). For service,

contact a service representative.

Page skew

•

Ensure that the paper is loaded properly.

Aa

BbCc

• Check the paper type and quality. See page

5.2.

• Ensure that the paper or other media is loaded

AaBbCc

correctly and the guides are not too tight or

AaBbCc

too loose against the paper stack.

AaBbCc

AaBbCc

Condition

Suggested solutions

Curl or wave

•

Ensure that the paper is loaded properly.

•

Check the type and quality. Both high

temperature and humidity can cause paper

curl. See page 5.2.

•

Turn over the stack of paper in the tray. Also

try rotating the paper 180° in the tray.

•

Try printing to the rear cover (face-up).

Wrinkles or

•

Ensure that the paper is loaded properly.

creases

•

Check the paper type and quality. See page

5.2.

• Open the rear cover and try printing to the rear

cover (face-up).

Back of

•

The transfer roller may be dirty. See page 8.1.

printouts are

•

Check for leaking toner. Clean the inside of

dirty

the printer.

Solid color or

• The toner cartridge may not be installed

Black pages

properly. Remove the cartridge and reinsert.

A

•

The toner cartridge may be defective and

need replacing. Install a new toner cartridge.

•

The printer may require repair. Contact a

service representative.

Loose toner

•

Clean the inside of the printer.

•

Check the paper type and quality. See page

5.2.