Samsung ML-1640 Series User Manual

Troubleshooting_37
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 page 19.
Page skew • Ensure that the paper is loaded properly.
• Check the paper type and quality. See page 19.
• Ensure that the paper or other material is loaded
correctly and the guides are not too tight or too
loose against the paper stack.
Curl or wave • Ensure that the paper is loaded properly.
• Check the paper type and quality. Both high
temperature and humidity can cause paper curl.
See page 19.
• Turn over the stack of paper in the tray. Also try
rotating the paper 180° in the tray.
Wrinkles or creases • Ensure that the paper is loaded properly.
• Check the paper type and quality. See page 19.
• Turn over the stack of paper in the tray. Also try
rotating the paper 180° in the tray.
CONDITION SUGGESTED SOLUTIONS
A
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc
Back of printouts
are dirty
• Check for leaking toner. Clean the inside of the
machine. See page 26.
Black pages • The toner cartridge may not be installed
properly. Remove the cartridge and reinsert it.
• The toner cartridge may be defective and need
replacing. Remove the toner cartridge and install
a new one. See page 29.
• The machine may require repair. Contact a
service representative.
Loose toner • Clean the inside of the machine. See page 26.
• Check the paper type and quality. See page 19.
• Remove the toner cartridge and install a new
one. See page 29.
• If the problem persists, the machine may require
repair. Contact a service representative.
Character Voids Character voids are white areas within parts of
characters that should be solid black:
• If you are using transparencies, try another
type of 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 page 19.
Horizontal stripes If horizontally aligned black streaks or smears
appear:
• The toner cartridge may be installed
improperly. Remove the cartridge and reinsert
it.
• The toner cartridge may be defective. Remove
the toner cartridge and install a new one. See
page 29.
• If the problem persists, the machine may
require repair. Contact a service
representative.
CONDITION SUGGESTED SOLUTIONS
A
A
AaBbCc
AaBbCc
AaBbCc
AaBbCc
AaBbCc

Samsung ML-1640 Series Specifications

General

Print Technology	Laser
Paper Capacity	150-sheet input tray
Connectivity	USB 2.0
Dimensions	341 x 224 x 184 mm
Weight	4.2 kg
Processor	150 MHz
Memory	8 MB
Paper Handling Input	150-sheet input tray
Paper Handling Output	100-sheet output tray
Print Speed	16 ppm
Print Resolution	Up to 1200 x 600 dpi
Monthly Duty Cycle	5, 000 pages
Black Print Resolution	Up to 1200 x 600 dpi effective output
Media Sizes Supported	A4, Letter, Legal, Executive, A5, A6, B5, C5, DL, Monarch