Samsung Electronics Co ML-2550 Laser Beam Printer User Manual 2550 EN
Samsung Electronics Co Ltd Laser Beam Printer 2550 EN
Contents
- 1. Users Manual 1
- 2. Users Manual 2
- 3. Users Manual 3
Users Manual 3

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7.24
Troubleshooting PS Errors
The following situations are PS language specific and may occur
when several printer languages are being used.
NOTE:
To receive a printed or screen displayed message when PS
errors occur, open the Print Options window and click the desired
selection next to the PostScript errors section.
Problem Possible Cause Solution
PostScript file can
not be printed.
The PostScript option
may not be installed.
• Print a configuration page and verify
that the PS version is available for
printing.
• If PostScript is not available, install
the PostScript option. See “Installing
Memory and PostScript DIMMs” on
page F.3.
“This job contains
binary data...”
message appears.
The pure binary data
option is not supported
by the PostScript
driver.
Open the Properties of the PostScript
driver, click on
PostScript
, and click on
Advanced
. The pure binary data
option is not supported. Choose
another.
A PS error page
prints.
Print job may not be
PS.
Make sure that the print job is a PS job.
Check to see whether the software
application expected a setup or PS
header file to be sent to the printer.
The optional Tray2
is not selected in
the driver.
The printer driver has
not been configured to
recognise the optional
Tray2.
Open the PostScript driver properties
and set the
Tray2
item of the
Device
option
to
Installed
.

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7.25
7
Common Linux Problems
Problem Possible Cause and Solution
I can’t change settings in
the configuration tool.
You need to have administrator privileges to be able to affect
global settings.
I am using the KDE
desktop but the
configuration tool and LLPR
won’t start.
Maybe you do not have the GTK libraries installed. These
usually come with most Linux distributions, but you may have
to install them manually. Refer to your distribution’s
installation manual for more details about installing additional
packages.
I just installed this
package but can’t find
entries in the KDE/Gnome
menus.
Some versions of the KDE or GNOME desktop environments
may require that you restart your session for the changes to
take effect.
I get a “Some options are
not selected” error
message while editing the
printer settings.
Some printers have conflicting settings, meaning that some
settings for two options can’t be selected at the same time.
When you change a setting and the Printer Package detects
such a conflict, the conflicting option is changed to a “No
Choice” value, and you have to choose an option that does
not conflict before being able to submit the changes.
I can’t make a printer the
system default.
In some conditions, it may not be possible to change the
default queue. This happens with some variants of LPRng,
especially on recent RedHat systems that use the “printconf”
database of queues.
When using printconf, the /etc/printcap file is automatically
refreshed from the database of printers managed by the
system (usually through the “printtool” command), and the
queues in /etc/printcap.local are appended to the resulting
file. Since the default queue in LPRng is defined as the first
queue in /etc/printcap, therefore it is not possible for the
Linux Printer Package to change the default when some
queues have otherwise been defined using printtool.
LPD systems identify the default queue as the one named
“lp”. Thus, if there is already a queue by this name, and if it
doesn’t have any alias, then you won’t be able to change the
default. To work around this, you can either delete the queue
or rename it by manually editing the /etc/printcap file.
The N-up setting does not
work correctly for some of
my documents.
The N-up feature is achieved through post-processing of the
PostScript data that is being sent to the printing system.
However, such post-processing can only be adequately
achieved if the PostScript data conforms to the Adobe
Document Structing Conventions. Problems may arise when
using N-up and other features relying on post-processing if
the document being printed isn’t compliant.

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7.26
I am using BSD lpr
(Slackware, Debian, older
distributions) and some
options chosen in LLPR
don’t seem to take effect.
Legacy BSD lpr systems have a hard limitation on the length
of the option string that can be passed to the printing system.
As such, if you selected a number of different options, the
length of the options may be exceeded and some of your
choices won’t be passed to the programmes responsible for
implementing them. Try to select less options that deviate
from the defaults, to save on memory usage.
I am trying to print a
document in Landscape
mode, but it prints rotated
and cropped.
Most Unix applications that offer a Landscape orientation
option in their printing options will generate correct PostScript
code that should be printed as is. In that case, you need to
make sure that you leave the LLPR option to its default
Portrait setting, to avoid unwanted rotations of the page that
would result in a cropped output.
Some pages come out all
white (nothing is printed),
and I am using CUPS.
If the data being sent is in Encapsulated PostScript (EPS)
format, some earlier versions of CUPS (1.1.10 and before)
have a bug preventing them from being processed correctly.
When going through LLPR to print, the Printer Package will
work around this issue by converting the data to regular
PostScript. However, if your application bypasses LLPR and
feeds EPS data to CUPS, the document may not print
correctly.
I can’t print to a SMB
(Windows) printer.
To be able to configure and use SMB-shared printers (such as
printers shared on a Windows machine), you need to have a
correct installation of the SAMBA package that enables that
feature. The “smbclient” command should be available and
usable on your system.
My application seems to be
frozen while LLPR is
running.
Most Unix applications will expect a command like the regular
“lpr” command to be non-interactive and thus return
immediately. Since LLPR is waiting for user input before
passing the job on to the print spooler, very often the
application will wait for the process to return, and thus will
appear to be frozen (its windows won’t refresh). This is
normal and the application should resume functioning
correctly after the user exits LLPR.
How do I specify the IP
address of my SMB server?
It can be specified in the “Add Printer” dialogue of the
configuration tool, if you don’t use the CUPS printing system.
Unfortunately, CUPS currently doesn’t allow to specify the IP
address of SMB printers, so you will have to be able to browse
the resource with Samba in order to be able to print.
Some documents come out
as white pages when
printing.
Some versions of CUPS, especially those shipped with
Mandrake Linux before the 8.1 release, have some known
bugs when processing the PostScript output from some
applications. Try upgrading to the latest version of CUPS (at
least 1.1.14). Some RPM packages for most popular
distributions are provided as a convenience with this Linux
Printing Package.
Problem Possible Cause and Solution

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7.27
7
Common DOS Problem
I have CUPS and some
options (such as N-up)
seem to be always enabled
even though I don’t pick
them in LLPR.
There may be some local options defined in your ~/.lpoptions
file, which is manipulated by the lpoptions command. These
options will always be used if not overridden by LLPR settings.
To get rid of all options for a printer, run the following
command, replacing “printer” with the name of the queue:
lpoptions -x printer
I configured a printer to
print to a file, but I get
“Permission denied” errors.
Most printing systems will not run as the super-user but as a
special user (usually “lp”). Therefore, make sure that the file
you have chosen to print to is accessible to the user owning
the spooler daemon.
On my PCL (or SPL)
printer, I sometimes get
error messages printing
instead of my document.
Unfortunately, some Unix applications may generate non-
compliant PostScript output that may not be supported by
Ghostscript, or even the printer itself in PostScript mode. You
can try to capture the output to a file and view the results
with Ghostscript (gv or ghostview will allow you to do so
interactively) and see if you get error messages. However,
since the application is at probably fault, contact your
software vendor to inform them of the issue.
Problem Possible Cause and Solution
Problem Possible Cause and Solution
When using the printer in
EPSON Dot Printer
Environment, sometimes I
can not get the output I
want.
Change the emulation to EPSON in the
Config
tab in the
Remote Control Panel. For detailed information about
selecting printer settings in the Remote Control Panel, see
page D.4.

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7.28
M
EMO

A
Your printer supports Macintosh systems with a built-in USB
interface or 10/100 Base-TX network interface card (option
for ML-2550). When you print a file from a Macintosh
computer, you can use the Samsung SPL II driver to support
your printer’s major printing features. You can also use
PostScript driver by installing the PPD file.
This chapter includes:
• Installing Software for Macintosh
• Creating a Desktop Printer
• Printing a Document
• Using Advanced Printing Features
USING YOUR PRINTER WITH
A MACINTOSH

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A.2
Installing Software for Macintosh
The CD-ROM that came with your printer provides you with the
SPL printer driver and the PPD file to use the PS driver, Apple
LaserWriter driver, for printing on a Macintosh computer.
Refer to the table below for the driver available for your printer
and system requirements.
NOTES:
• If you are a ML-2550 user, you need to install the optional PS
DIMM (see page F.3) for using the PS driver.
• Please refer Samsung homepage for MAC OS 10.x Printer Driver.
Samsung homepage
:
www.samsungprinter.com
1
Turn on your computer and printer.
2
Insert the CD-ROM which came with your printer into the
CD-ROM drive.
3
Double-click SAMSUNG_LBP on your Macintosh desktop.
4
Double-click the West folder.
5
Double-click the Samsung Laser Printer Installer icon
next to each language to select the correct one.
6
Click Continue, and then click Continue.
Your
Printer
Available
Driver Connection System
Requirements
ML-2550 SPL driver USB interface
(see page 2.11)
Mac OS 8.6 and
G3 processor or
higher
ML-2551N/
ML-2552W
• SPL driver
• PS driver
USB interface
(see page 2.11)
Mac OS 8.6 and
G3 processor or
higher
Network
interface (see
page 2.12)
Mac OS 7.5 and
7200 processor or
higher

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A
7
The Samsung Laser Printer Installer window opens. Select
the installation type.
The window provides two options for software installation:
•Easy Install (recommended method): This option loads
the PPD file and installs the SPL driver.
•Custom Install: This option allows you to choose which
components will be installed, the SPL II driver, the PS
Level 3 PPDs and the Adobe Acrobat Reader programme
for opening the User’s Guide.
8
Click Install.
If other programmes are operating, the alert message
appears. Click Continue to install the software, or click
Cancel and close other programmes, and install the
software.
9
After the installation is completed, click Restart.

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A.4
Creating a Desktop Printer
After installing print software, you need to create a desktop
printer for using your printer. Depending on the connection you
are using, the procedure differs.
Creating a Desktop Printer for the SPL
Driver
1
From the Apple menu, select Chooser.
2
From the left pane of the Chooser window, click SAMSUNG
SPL II. Then your printer name will appear in thee right
pane of the Chooser window.
3
Click your printer name, and close the window.
4
The message box indicating that you have changed your
current printer appears. Click OK.
5
A SAMSUNG SPL II printer icon will be created on your
desktop.
Creating a Desktop Printer for the PS Driver
For a USB-connected Macintosh
1
Open Macintosh HD and double-click Application.
2
Double-click Utilities.
3
Double-click Desktop Printer Utility.
NOTE:
The position of Desktop Printer Utility may vary depending
to the MAC OS.
4
Select LaserWriter 8, and select Printer (USB) in the list
box. Then click OK.

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A.5
A
5
Click Change in the USB Printer Selection section. The
name of your printer appears in the list.
6
Click ML-2550, and click OK.
7
Click Auto Setup in the PostScript Printer Description
(PPD) File section.
If Auto Setup does not work properly, click Select PPD and
choose Samsung ML-2550 Series.
8
When the setup is completed, click Create.
9
Click Save.
For a Network-connected Macintosh
1
From the Apple menu, select Chooser.
2
Click LaserWriter 8 (the PostScript driver provided with
your Macintosh).
The name of your printer appears in the list.
3
Select SEC000xxxxxxxxx from the printer box (where the
xxxxxxxxx varies depending on each of the products).
4
When the setup is completed, you see your printer icon is
created as a desktop printer.
If Auto Setup does not work properly, click Select PPD,
choose SAMSUNG ML-2550 Series and click OK.

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A.6
Printing a Document
When you print with a Macintosh, you need to check the printer
software setting in each application you use. Follow these steps
to print from a Macintosh:
1
Open a Macintosh application and select a file you want to
print.
2
Open the File menu and click Page Setup (Document
Setup in some applications).
3
Choose your paper size, orientation, paper type and other
options and click OK.
Choose Watermark to add a watermark to each page in
your document to emphasize its purpose or indicate how it
should be handled. For details on the watermark options,
see page 5.18.
• Mac OS 9.1 doesn’t support the Watermark feature.

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A.7
A
4
Open the File menu and click Print. You will see the
SAMSUNG SPL II Printer window.
If you are using the PS driver, the LaserWriter 8 driver
window appears.
5
Choose the number of copies and indicate which pages you
want to print.
6
Click Print when you finish setting the options.
For advanced printing
features, select the
desired option. For
details, see page A.8.
Restores the default
settings.
Saves the current
settings for later use.

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A.8
Using Advanced Printing Features
The SAMSUNG SPL II Printer window contains five categories of
advanced properties. Listed below is the name of each property.
- Darkness/Quality
- Layout
- Color
- Background Printing
- Paper Source
Figures below display each property in the SAMSUNG SPL II
Printer window.
Darkness/Quality
Layout
Select the
print
darkness.
Select the print
resolution.
Select the number of pages
you want to print on one
sheet of paper. The pages
will appear decreased in
size and arranged on the
sheet.
To print the border
of each page, check
this box.

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A.9
A
Color
Background Printing
Select the grayscale mode.
➐
Black&White
➐
Grayscale
Turns background
printing on or off.
Select a priority for your print job in the queue of jobs
waiting to print, click one of the following:
• Urgent: to print before any Normal priority job.
• Normal: to print in the order the job is received.
• Print at: to print at the specific time you enter in the day
and time in the fields to the right.
• Put document on hold: to hold the print job in the print
queue until you are ready to release it.

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A.10
Paper Source
If you installed the optional
Tray2, check this box to
activate Tray2.
Select the corresponding paper source.
If Auto Select is set, the printer
automatically selects the print material
from the paper tray, according to the
following order: Multi-Purpose Tray, Tray1
and the optional Tray2.

B
If you want to use the PostScript driver provided with your
system CD-ROM to print a document, use the information
on this Appendix.
This chapter includes:
• Installing PPD Files
• Using PS Printer Driver Features
NOTE:
If you are a ML-2550 user, you need to install an
optional PS DIMM for using the PostScript driver. For more
information, see Appendix F,“Programme Installing Printer
Options.”
USING WINDOWS
POSTSCRIPT DRIVER

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B.2
Installing PPD Files
PPDs, in combination with the PostScript driver, access the
printer features and allow the computer to communicate with
the printer. An installation programme for the PPDs is provided
on the supplied software CD-ROM.
NOTE:
• Installing the PostScript printer driver in Windows 9x/Me/NT 4.0
may require the use of the operating system files on the original
CD-ROM that came with your system.
• If you have a PostScript 3 driver in Windows 9x/Me/NT 4.0 and
want to use it, you must install the PostScript 3 PPD which is also
provided on the CD-ROM.
Before installing PPD files, make sure that the printer and the PC
are properly connected with parallel, USB or network interface.
For information about:
• connecting with the parallel interface, see page 2.10.
• connecting with the USB interface, see page 2.11. For
Windows 98/Me, the USB driver must be installed. See
page 2.20.
• connecting with a network interface, see page 2.12. For a
ML-2550, you need to install an optional network interface
card; see “Installing a Network or Serial Interface Card” on
page F.6.
In Windows 95/98/Me
1
Place the CD-ROM in the CD-ROM drive. Installation will
start automatically.
If the CD-ROM drive does not automatically run:
Select Run from the Start menu, type x:\cdsetup.exe in
the Open box (where x is the drive letter for the CD-ROM
drive) and click OK.
2
Select the appropriate language.
If you can’t find the desired language from the screen, use
the scroll button on the bottom right of the window to
display more languages.
3
Click Install the Samsung Software-II on your PC
(PostScript).

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B.3
B
4
Click Next.
5
Select Local Printer and click Next.
6
Click on Have Disk, and then choose:
• for Windows 95/98, x:\ML-2550\PS
—
DRV\ AddPrint\
English (or the desired language)\Win9598\level2
• for Windows Me, x:\ML-2550\PS_DRV\ AddPrint\
English (or the desired language)\WinME\level2
(where x is the drive letter for the CD-ROM drive)
7
Click OK.
8
When Samsung ML-2550 Series PS appears in the
Printers list, click Next.
NOTE:
If you are prompted to insert the Windows CD-ROM, insert
the CD-ROM that came with your Windows into the CD-ROM drive.
Follows the instructions on the screen.
9
Select the port you want use and click Next.
10
Click Next.
11
When a window prompting to print a test page appears,
select Yes or No and click Finish.
12
If you select Yes in Step 11, the printer prints a test page.
When the page prints out properly, click Yes.
13
When the installation is completed, click Finish.
In Windows NT 4.0
1
Follow steps from 1 to 4 in “In Windows 95/98/Me” on
page B.2.
2
Select the port you want use and click Next.
3
Click on Have Disk, and then choose x:\ML-2550\
PS_DRV\ AddPrint\ English (or the desired language)\
WinNT\level2. Click OK.

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NOTE:
If you are prompted to insert the Windows CD-ROM, insert
the CD-ROM that came with your Windows into the CD-ROM drive.
Follows the instructions on the screen.
4
When Samsung ML-2550 Series PS appears in the
Printers list, click Next.
5
Click Next.
6
When a window prompting to print a test page appears,
select Yes or No and click Finish.
7
If you select Yes in Step 6, the printer prints a test page.
When the page prints out properly, click Yes.
8
When the installation is completed, click Finish.
In Windows 2000/XP
1
Follow steps from 1 to 4 in “In Windows 95/98/Me” on
page B.2.
2
When the installation is completed, click Finish.
Reinstalling the PS Driver
(Windows 2000/XP)
1
From the Start menu, select Programs.
2
Select Samsung ML-2550 Series, and then Samsung
ML-2550 Series PS Driver Maintenance.
The Samsung ML-2550 Series PS Driver Maintenance
window appears.
3
Check Repair and then click Next.
4
Click Finish.

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B.5
B
Uninstalling the PS Driver
In Windows 9x/Me/NT 4.0
1
From the Start menu, select Programs.
2
Select Samsung ML-2550 Series, and then Uninstall
Samsung ML-2550 Series PS Driver.
3
When you are asked to confirm your selection, click OK.
The Samsung ML-2550 Series PS driver and all of its
components are removed from your computer.
4
Click Finish.
In Windows 2000/XP
1
From the Start menu, select Programs.
2
Select Samsung ML-2550 Series, and then Samsung
ML-2550 Series PS Driver Maintenance.
The Samsung ML-2550 Series PS Driver Maintenance
window appears.
3
Check Remove and then click Next.
4
When you are asked to confirm your selection, click OK.
The Samsung ML-2550 Series PS driver and all of its
components are removed from your computer.
5
Click Finish.

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Using PS Printer Driver Features
Certain printer features are not available in this PS driver. For
details about the features, refer to Chapter 5,“Printing Tasks.”
The printer automatically switches between PS and SPL printer
languages depending on the driver you have selected.
Accessing Printer Properties
The properties window for the Windows PostScript printer driver
can be opened from the Printers folder or an application.
To open the properties window from the Printer folder:
1
Click the Windows Start button.
2
Select Settings then Printers to open the Printers window.
3
Select Samsung ML-2550 Series PS.
4
Click the right mouse button and select Properties to open
the properties window.
To open the properties window from an application:
1
From the File menu, select Print to open the Print window.
2
Make sure that Samsung ML-2550 Series PS is selected
in the Name drop-down list.
3
Click Properties to open the properties window.

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C.2
Installing the Printer Driver
System Requirements
Supported OS
• Redhat 6.2/7.0/7.1 and above
• Linux Mandrake 7.1/8.0 and above
• SuSE 6.4/7.0/7.1 and above
• Debian 2.2 and above
• Caldera OpenLinux 2.3/2.4 and above
• Turbo Linux 6.0 and above
• Slackware 7.0/7.1 and above
Recommended Requirements
• Pentium II or Power PC G3
• RAM 64 MB or higher
• HDD 20 MB or higher
Softwares
• Glibc 2.1 or higher
• GTK+ 1.2 or higher
• GhostScript
Installing the Printer Driver
1
Make sure that you connect the printer to your computer.
Turn both the computer and the printer on.
2
When the Administrator Login window appears, type in
“root” in the Login field and enter the system password.
NOTE:
You must log in as a super user (root) to install the printer
software. If you are not, ask your system administrator.

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3
Insert the printer software CD-ROM. The CD-ROM
automatically runs.
NOTE:
If the CD-ROM does not automatically run, click the
icon at the bottom of the window. When the Terminal screen
appears, type in:
[root@local /root]#
cd /mnt/cdrom
(the CD-ROM directory)
[root@local cdrom]#
./setup.sh
4
Select the installation type, either Recommended or
Expert, and then click Continue.
Recommended is fully automated and is not required any
interaction. Expert installation allows you to select the
install path or printing system.
5
If you selected Recommended, go to Step 6.
For Expert, select the desired option and then click Begin
Install.

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6
The printer driver installation begins. When the installation
is completed, click Start.
7
The Linux Printer Configuration window opens. Click the
Add Printer icon on the tool bar at the top of the window.
NOTE:
Depending on the printing system in use, the
Administrator Login window may appear. Type in “root” in the
Login field and enter the system password.
8
You see the printers currently added in your system. Select
the printer you will use. The function tabs available for the
selected printer appear at the top of the Add a Printer
window.
NOTE:
If the printer supports PS printing, it is recommended to
select the PS driver.

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9
Click the Connection tab and ensure that the printer port is
set properly. If not proper, change the device setting.
10
You can use the Settings tab and the Queue tab to view the
printer’s current setting. If necessary, you can change the
settings.
NOTE:
The options may differ depending on the printer in use. The
Description and the Location field in the Queue screen may not
appear depending on the printing system in use.
11
To exit, click OK.
12
When the window prompts that the new printer is
successfully configured, click OK.
13
The Linux Printer Configuration window re-appears. From the
Info tab, you can view the information about your printer. If
necessary, you can change the printer configuration. For
details about changing the printer configuration, see “Using
the Configuration Tool” on page C.8.

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Changing the Printer Connection Method
If you change the printer connection method from USB to
parallel or vice versa while in use, you must re-configure your
Linux printer by adding the printer in your system. Take the
following steps:
1
Make sure that you connect the printer to your computer.
Turn both the computer and the printer on.
2
When the Administrator Login window appears, type in
“root” in the Login field and enter the system password.
NOTE:
You must log in as a super user (root) to install a new
printer to the printing system. If you are not, ask your system
administrator.
3
From the Startup Menu icon at the bottom of the desktop,
select Linux Printer and then Configuration Tool.
You can also access the Linux Printer Configuration window
by typing in “linux-config” from the Terminal screen.
4
When the Linux Printer Configuration window appears, click
the Add Printer icon on the tool bar at the top of the
window.
5
Click the Connection tab at the top of the Add a Printer
window.
Ensure that the printer port is set properly. If not proper,
change the device setting.
6
Click OK.

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Uninstalling the Printer Driver
1
From the Startup Menu icon at the bottom of the desktop,
select Linux Printer and then Configuration Tool.
You can also access the Linux Printer Configuration window
by typing in “linux-config” from the Terminal screen.
2
In the Linux Printer Configuration window, select the
Uninstall command from the File menu.
3
The Administrator Login window appears. Type in “root” in
the Login field and enter the system password. Click
Proceed.
NOTE:
You must log in as a super user (root) to uninstall the
printer software. If you are not, ask your system administrator.
4
The message window which is asking your confirmation to
proceed with the uninstallation appears. Click Yes.
5
Select Complete uninstall and then click Uninstall.

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Click OK to begin uninstallation.
7
When the uninstallation is completed, click Finished.
Using the Configuration Tool
The configuration tool allows the administrative tasks, including
adding and removing new printer, and changing their global
settings. Regular users can also run it to easily inspect job
queues, examine the printer properties and changing their local
preference.
To access the Configuration Tool:
1
From the Startup Menu icon at the bottom of the screen,
select Linux Printer and then Configuration Tool. The
Linux Printer Configuration window appears.
You can also open this window from the Terminal screen by
typing in “linux-config.”
2
The Linux Printer Configuration window shows a list of
installed printers at the left pane. The right pane shows a
number of tabs that display information regarding the
currently selected printer.
Select your printer, if not currently selected.

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The Info tab shows general information about the printer.
If you are an Internet user, you can click Go to the Web
page for this printer to access the web page.
Click the Job tab to inspect and manage the job queue for
the selected printer. You can suspend, resume or delete a
specific job(s) in the queue. If you drag a specific job(s),
you can drop it into the print queue of another printer.
The Properties tab allows you to change the default printer
settings.
NOTE:
Regular users are able to override the system-wide default
settings defined by the administrator. When a regular user clicks
Apply, these custom settings will be saved in the user’s profile and
may be later used with LLPR. If the administrator is running the
configuration tool, then the settings will be saved as the new
global defaults.

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Changing LLPR Properties
You can fine tune the printer’s properties by opening the LLPR
Properties window.
To open the LLPR Properties window:
1
From the application you are using, select the Print
command.
2
When the Linux LPR window opens, click Properties.
You can also open the LLPR window by using the following:
• Click the Startup Menu icon at the bottom of the screen
and select Linux Printer and then Linux LPR.
• If the Linux Printer Configuration window is currently
open, select Test Print from the Print menu.

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3
The LLPR Properties window opens.
You will see the following six tabs at the top of the window:
•General - allows you to change the paper size, the paper
type, the paper source, the orientation of the documents,
enable duplex feature, add start and end banners, and
change the number of pages per sheet.
•Margins - allows you to specify the page margins. The
graphics on the right shows the current settings. These
margins do not apply when printing regular PostScript
data.
•Image - allows you to set image options that will be used
when printing images files, i.e. when a non-PostScript
document is passed to LLPR on the command line. But
colour settings will also take effect for postscript
documents.
•Text - allows you to select the density of the text and
turn the syntax colouring on or off.
•HP-GL/2 - allows you to set default options to print
documents of the HP-GL/2 format, which is used by some
plotters.
•Advanced - allows you to override the default settings for
the printer.
If you click the Save button at the bottom of the window,
the options will be kept between LLPR session.
Use the Help button to view details about the options in the
window.
4
To apply the options, click OK in the LLPR Properties
window. You will return to the Linux LPR window. To start
printing, click OK.

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M
EMO

D
While your printer is primarily a Windows printer, you can
also print from a DOS software Programme using the
Remote Control Panel utility provided in the supplied
software CD-ROM.
This chapter includes:
• About the Remote Control Panel
• Installing the Remote Control Panel
• Selecting Print Settings
PRINTING FROM DOS
APPLICATIONS

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About the Remote Control Panel
DOS users have access to many printer features through specific
DOS printer drivers; however, many software manufactures do
not develop printer drivers for their software programmes. Your
printer provides the software control panel for improved printer
control when DOS printer drivers are not available or when
certain print settings are not available through DOS software
programmes.
NOTE:
The printer’s Remote Control Panel is not a printer driver.
It should be used to set print settings that are not available
through DOS software programmes. Printer drivers are supplied by
the manufacturers of your DOS software programmes. If your DOS
software Programme does not include a printer driver for your
printer, contact the manufacturer of the software or use one of the
alternate printer drivers.
Installing the Remote Control Panel
1
Place the CD-ROM in the CD-ROM drive. Installation will
start automatically.
If the CD-ROM drive does not automatically run:
Select Run from the Start menu, type x:\cdsetup.exe in
the Open box (where x is the drive letter for the CD-ROM
drive) and click OK.
2
Select the appropriate language.
If you can’t find the desired language from the screen, use
the scroll button on the bottom right of the window to
display more languages.
3
Click Install the Samsung Software-III on your PC
(WinRCP).

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4
Click Next.
The files are copied into the appropriate directory.
5
After the installation is completed, click Finish.
Uninstalling the Remote Control Panel
1
From the Start menu, select Programs.
2
Select Samsung ML-2550 Series, and then Uninstall
Remote Control Panel.
3
Click OK.
The Samsung ML-2550 Series Remote Control Panel and all
of its components are removed from your computer.
4
Click Finish.

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Selecting Print Settings
You can use this Remote Control Panel to select print settings
that may not be available on some DOS Programmes. Typically,
duplicate print settings that are selected from a DOS software
programme override the ones that are selected in the Remote
Control Panel.
Starting the Remote Control Panel
1
From the Start menu, select Programs.
2
Select Samsung ML-2550 Series and then Remote
Control Panel.
3
The Remote Control Panel window allows you to access all
the information you need when using your printer. If
necessary, click the other tabs on the top of the window to
access other features.
4
When you finish changing the settings, click Send.

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Using the Remote Control Panel Tabs
The Remote Control Panel allows you to access the following
features:
Printing Tab
In this tab, you can configure general settings for printing.
•Paper Size sets the paper size.
•Orientation determines how the output is printed on the
page.
•Paper Tray sets the default paper source.
•Auto CR sets how the printer performs a carriage return.
•Copies sets the number of copies printed for each page.
•Quality specifies the print quality.
•Margins sets the top and left margin of the print material.

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Config Tab
You can configure various printer features.
•Emulation selects the emulation for printing a document.
The factory default is Auto.
•Power Save determines the length of time the printer waits
after a job is printed before it goes to a reduced power state.
If the printer is used frequently, select OFF which keeps the
printer ready to print with the minimum warm-up time. This
uses more power to keep the printer warm and ready to print.
•Auto Continue determines what action the printer should
take if the Multi-Purpose Tray is empty when a manual feed
print job is sent to the printer. If it is checked, the printer will
pick up the paper from the tray after fifteen seconds.
Otherwise, the printer will wait for you to load paper in the
Multi-Purpose Tray.
•Jam Recovery determines what action the printer should
take when a paper jam occurs. If it is unchecked, the printer
does not reprint a page that has jammed. If it is checked, the
printer keeps the image in memory for a printed page until
the printer signals that the page has successfully printed. The
printer reprints all jammed pages.
•Toner save determines the toner quantity the printer should
use when printing. If it is checked, the printer conserves
toner when printing. The default value is unchecked, which
provides 100% usage.
•Duplex allows you to print on both sides of paper. For details,
see page 5.11.

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Job Tab
You can set options for improving the quality of your print job.
•Toner Density determines the toner density of page. The
default value is Medium.
•Paper Type provides the printer with information about the
type of paper to be used for a print job. For the best result,
set this to the paper type you loaded in the tray of the printer.
When using the plain paper, set this to Printer Default.
•Image Quality improves the print quality of your text and
image and make the characters and images appear smoother.
It is preset to Normal at the factory.
•Time out determins the amount of time (in seconds) the
printer will wait before printing the last page of a print job
that does not end with a command to print the page or a
formfeed character. You can set from 0 to 300 seconds.

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Test Tab
This tab allows you to print a resident page to test your printer’s
performance.
•Self Test prints a configuration sheet. A list of the user
default settings and the amount of printer memory available
prints.
•Demo Page prints a demonstration page. It shows the
printer features and specifications.

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PCL Tab
In this tab, you can configure various settings for PCL emulation.
•Typeface allows you to select the desired typeface. This
setting is ignored when the software application specifies a
font.
•Symbol Set determines the symbol set. A symbol set is a set
of alphabetic and numeric characters, punctuation, and
special symbols used when printing with a selected font.
•Pitch sets the font pitch (only if you have selected a scalable
monospaced font). Pitch refers to the number of fixed-space
characters in one horizontal inch of type.
•Point Size sets the font point size (only if you have selected
a scalable typographic font). Point size refers to the height of
the characters in the font. One point equals approximately
1/72 of an inch. You can select point sizes from 4.0 to 999.75
in increments of 0.25 points.
•Lines Per Page sets the number of lines that print on each
page. The setting can range from 5 to 128 lines per page.
•Courier determines the courier font type; Regular or Dark.
•Font List prints a font list showing all the fonts available for
PCL emulation.

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Flash Font and Macro Tab
This tab allows you to add fonts and macros to the Flash
memory of the printer.
•Fonts adds or deletes fonts. You can also print the font
sample list.
•Macros adds or deletes macros. You can also activate
(Enable macro) or deactivate (Disable macro) them.
•Delete all macros and fonts deletes all macros and fonts in
the flash memory.
•Refresh updates information about fonts and macros in the
flash memory.

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PS 3 Tab
You can configure various settings for PostScript 3 emulation.
•Font List allows you to print the PS font sample list.
•Print error information determines whether or not the
printer prints the error information page when an error occurs
during processing the job. Select ON to print the page,
otherwise select OFF.

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EPSON/IBM Tab
You can configure various settings for EPSON/IBM emulation.
•Font allows you to select the desired font.
•International character set allows you to select a
character set of the desired language.
•Character Table selects the character sets.
•Pitch sets the font pitch. Pitch refers to the number of
fixed-space characters in a horizontal inch of type.
•LPI sets the number of lines printed a vertical inch. You can
select 6 or 8 lines.
•Auto Wrap determines whether or not the printer
automatically performs line feed when the data overflows the
printable area of the print material.
•Font List prints a font list showing all the fonts available for
EPSON emulation.

E
If you work in a networked environment, the printer can be
shared by other users on the network. ML-2551N and
ML-2552W printers are network printers and can be
connected to the network via direct attachment to an
external print server.
This chapter includes:
• About Sharing the Printer on a Network
• Setting Up a Locally Shared Printer
• Setting Up a Network-Connected Printer
NOTE:
If you are a ML-2550 user, you need to install an
optional network interface card. For more information, see
Appendix F, “Programme Installing Printer Options.”
USING YOUR PRINTER ON
A NETWORK

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About Sharing the Printer on a
Network
If you work in a networked environment, you can connect your
printer to the network.
Locally-Shared Printer
You can connect the printer directly to a selected computer,
which is called the “host computer” on the network. The printer
can then be shared by other users on the network through a
Windows 9x/Me/XP/NT 4.0/2000 network printer connection.
Network-connected Printer
ML-2551N and ML-2552W printers have the built-in network
interface. For more information about connecting your printer to
the network, see page 2.12.
To use a ML-2550 printer as a network printer, you need to install
an optional network interface card in your printer. For a
ML-2551N printer, you can replace the network interface card to
one supporting the wireless LAN interface. See page F.6 for
information about installing the card.
Printing Across a Network
Whether the printer is locally connected or network-connected,
you need to install the ML-2550 series printer software on each
computer that will print documents to the printer.

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Setting Up a Locally Shared Printer
In Windows 9x/Me
Setting Up the Host Computer
1
Start Windows.
2
From the Start menu, select Control Panel, and double-
click on the Network icon.
3
Check the File and Print Sharing box, and click OK. Close
the window.
4
From the Start menu, select Printers from Settings and
double-click your printer name.
5
Select Properties in the Printer menu.
6
Click the Sharing tab and check the Shared As box. Fill in
the Shared Name field and click OK.
Setting Up the Client Computer
1
Right-click the Windows Start button and select Explorer.
2
Open your network folder in the left column.
3
Right-click the shared name and select Capture Printer
Port.
4
Select the port you want, check the Reconnect at log on
box, and click OK.
5
From the Start menu, select Settings and then Printers.
6
Double-click your printer icon.
7
From the Printer menu, select Properties.
8
From the Details tab, select the printer port and click OK.

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In Windows NT 4.0/2000/XP
Setting Up the Host Computer
1
Start Windows.
2
For Windows NT 4.0/2000, select Settings, and Printers
from the Start menu.
For Windows XP, select Printers and Faxes from the Start
menu.
3
Double-click your printer icon.
4
From the Printer menu, select Sharing.
5
For Windows NT 4.0, check the Shared box.
For Windows 2000, check the Shared As box.
For Windows XP, check the Share this printer box.
6
For Windows NT 4.0, fill in the Share Name field and click
OK.
For Windows 2000/XP, fill in the Shared Name field and
click OK.
Setting Up the Client Computer
1
Right-click the Windows Start button and select Explorer.
2
Open your network folder in the left column.
3
Click the shared name.
4
For Windows NT 4.0/2000, select Settings and Printers
from the Start menu.
For Windows XP, select Printers and Faxes from the Start
menu.
5
Double-click your printer icon.
6
From the Printer menu, select Properties.
7
From the Ports tab, click Add Port.

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Select Local port and click New Port.
9
Fill in the Enter a port name field, enter the shared name.
10
Click OK and click Close.
11
For Windows NT 4.0, click OK.
For Windows 2000/XP, click Apply and click OK.
Setting Up a Network-Connected
Printer
To use as your network printer, you have to set up the desired
network protocols on the printer. Setting protocols can be
accomplished by using the supplied network program. Please
refer to SyncThru User’s Guide.
You can configure the basic network parameters through the
printer’s control panel. Use the printer control panel to do the
following:
• Print a Network Configuration Page
• Enable or disable network protocols ( AppleTalk, IPX/SPX)
• Configure TCP/IP
• Configure IPX frame types

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Configuring Network Parameters on the
Control Panel
Supported Operating Systems
• IPX/SPX: Internet Packet exchange/Sequenced Packet eXchange
• TCP/IP: Transmission Control Protocol/Internet Protocol
• DLC/LLC: Data Link Control/Logical Link Control
• DHCP: Dynamic Host Configuration Protocol
• BOOTP: Bootstrap Protocol
Printing a Network Configuration Page
The Network Configuration page shows how the network
interface card on your printer is configured. The default settings
enabled all parts which are suitable for most applications.
1
Press the Menu button ( ) until you see “Network” on the
bottom line of the display.
2
Press the Enter button ( ) to access the menu.
3
Press the scroll button ( or ) until “Print Net CFG”
displays on the bottom line.
4
Press the Enter button ( ).
The Network Configuration page prints out.
Item Requirements
Network Interface 10/100 Base-TX (standard for ML-2551N
and ML-2552W) or 802.11b Wireless LAN
(standard for ML-2552W)
Network Operating
System
• Novell NetWare 3.x, 4.x, 5.x
• Windows 95/98/Me, NT 4.0/2000
• Unix AT&T, BSD4.3, HP-UX, SUN OS,
SOLARIS, SCO
• Linux RedHat 6.0
• Macintosh OS 7.0 or higher
Network Protocols • Netware IPX/SPX
• TCP/IP, DLC/LLC on Windows
• Port9100 on Windows NT, Unix, Linux
• Apple EtherTalk (802.3)
Dynamic Addressing
Server
• DHCP, BOOTP

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Setting Network Protocols
When you first install the printer, all supported network
protocols are enabled when you turn the printer on. If a network
protocol is enabled, the printer may actively transmit on the
network even when the protocol is not in use. This may increase
network traffic slightly. To eliminate unnecessary traffic, you can
disable unused protocols.
1
Press the Menu button ( ) until you see “Network” on the
bottom line of the display.
2
Press the Enter button ( ) to access the menu.
3
Press the scroll button ( or ) until “Config Network”
displays on the bottom line. Press the Enter button ( ).
4
Press the scroll button ( or ) to display “Yes” and
press the Enter button ( ). Then press the Upper Level
button ( ).
5
Press the scroll button ( or ) until you see the desired
protocol on the bottom line.
You can choose AppleTalk or Netware.
6
Press the Enter button ( ).
7
Press the scroll button ( or ) to change the setting to
“On” (enable) or “Off” (disable).
8
Press the Enter button ( ) to save the selection.

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Configuring TCP/IP
Your printer can be set up on a variety of TCP/IP networks. There
are several ways in which your printer can be assigned a TCP/IP
address, depending on your network.
• Static Addressing: TCP/IP address is assigned manually by
the network administrator.
• Dynamic Addressing BOOTP/DHCP(default): TCP/IP address
is assigned automatically by the server.
Static Addressing
To enter the TCP/IP address from your printer’s control panel,
take the following steps:
1
Press the Menu button ( ) until you see “Network” on the
bottom line of the display. Press the Enter button ( ) to
access the menu.
2
Press the Enter button ( ) when “Config Network”
displays on the bottom line.
3
Press the scroll button ( or ) to display “Yes” and
press the Enter button ( ).
4
Press the Upper Level button ( ), then use the scroll
button ( ).
5
Press the Enter button ( ) when “Config TCP” displays.
6
Press the scroll button ( or ) to display “Yes” and
press the Enter button ( ).
7
Press the Upper Level button ( ), then use the scroll
button ( ).
8
Press the Enter button ( ) when “IP Get Method”
displays.
9
Press the scroll button ( or ) to display “Static” and
press the Enter button ( ).
10
Press the Upper Level button ( ), then use the scroll
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11
Press the Enter button ( ) to access the IP Address
menu.
IP address consists of 4 bytes.
12
Press the scroll button ( or ) to enter a number
between 0 and 255 and press the Enter button ( ).
13
Repeat Step 12 to complete the address from the 1st byte
to the 4th byte.
14
To select other parameters, such as Subnet Mask or
Gateway, press the Upper Level button ( ), then use the
scroll button ( or ). Press the Enter button ( ).
15
Repeat steps 12 and 13 to configure the other TCP/IP
parameters.
Dynamic Addressing (BOOTP/DHCP)
To assign the TCP/IP address automatically by the server, take
the following steps:
1
Press the Menu button ( ) until you see “Network” on the
bottom line of the display. Press the Enter button ( ) to
access the menu.
2
Press the Enter button ( ) when “Config Network”
displays on the bottom line.
3
Press the scroll button ( or ) to display “Yes” and
press the Enter button ( ).
4
press the Upper Level button ( ), then use the scroll
button ( ).
5
Press the Enter button ( ) when “Config TCP” displays.
6
Press the scroll button ( or ) to display “Yes” and
press the Enter button ( ).
Enter a number between 0
and 255 for each byte.

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7
Press the Upper Level button ( ), then use the scroll
button ( ).
8
Press the scroll button ( or ) to display “DHCP” and
press the Enter button ( ).
9
To assign the address from the BOOTP server, press the
Enter button ( ) when “BOOTP” displays.
Configuring IPX Frame Types
On IPX/SPX protocol networks (for example, Novell NetWare),
the format of network communication frames must be specified
on the printer. In most cases, you can keep the default setting
“AUTO”. However, you can manually set the frame type format,
if required.
•AUTO (default): Automatically senses and limits the frame
type to the first one detected.
•EN_8023: Limits the frame type to IPX over IEEE 802.3
frames. All others will be counted and discarded.
•EN_II: Limits the frame type to IPX over Ethernet Frames.
All others will be counted and discarded.
•EN_8022: Limits the frame type to IPX over IEEE 802.2 with
IEEE 802.3 frames. All others will be counted and discarded.
•EN_SNAP: Limits the frame type to IPX over SNAP with IEEE
802.3 frames. All others will be counted and discarded.
Note that the IPX/SPX protocol must be enabled in the Netware
menu before you can configure frame types. See “Setting
Network Protocols” on page E.7.
Take the following steps to change the frame type format:
1
Press the Menu button ( ) until you see “Network” on the
bottom line of the display. Press the Enter button ( ) to
access the menu.
2
Press the Enter button ( ) when “Config Network”
displays on the bottom line.

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3
Press the scroll button ( or ) to display “Yes” on the
bottom line. Press the Enter button ( ).
4
Press the Upper Level button ( ).
5
Press the scroll button ( or ) until “Netware” displays
on bottom line. Press the Enter button ( ).
6
Press the Enter button ( ) when “On” displays.
7
press the Upper Level button ( ), then use the scroll
button ( ).
8
Press the Enter button ( ) when “Config Netware”
displays.
9
Press the scroll button ( or ) to display “Yes” on the
bottom line. Press the Enter button ( ), and then press
the Upper Level button ( ).
10
Press the Upper Level button ( ), then use the scroll
button ( ).
11
Press the Enter button ( ) when “IPX Frame Type”
displays.
12
Press the scroll button ( ) until you see the desired frame
type and press the Enter button ( ).
13
Press the scroll button ( or ) to change the setting and
then press the Enter button ( ).
14
Repeat steps 12 and 13 to configure another frame type, if
necessary.

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Restoring the Network Configuration
You can return the network configuration to its default settings.
1
Press the Menu button ( ) until you see “Network” on the
bottom line of the display.
2
Press the Enter button ( ) to access the menu.
3
Press scroll button ( or ) until “Default Set” displays
on the bottom line.
4
Press the Enter button ( ) to confirm the selection.

F
Your printer is a full-featured laser printer that has been
optimised to meet most of your printing needs. Recognizing
that each user may have different requirements, however,
Samsung makes several options available to enhance the
printer’s capabilities.
This chapter includes:
• Precautions When Installing Printer Options
• Installing Memory and PostScript DIMMs
• Installing a Network or Serial Interface Card
• Installing an Optional Paper Tray
PROGRAMME INSTALLING
PRINTER OPTIONS

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F.2
Precautions When Installing Printer
Options
DISCONNECT THE POWER CORD:
Never remove the printer control board while the printer is
plugged in.
To avoid the possibility of an electrical shock, always disconnect
the power cord when installing or removing ANY internal or
external printer option.
DISCHARGE STATIC ELECTRICITY:
The control board and internal printer options (Memory and PS
DIMMs, Network and Serial interface cards) are sensitive to
static electricity. Before installing or removing an internal
option, discharge static electricity from your body by touching
something metal, such as the metal back plate on any device
plugged into a grounded power source. If you walk round before
finishing installation, discharge any static electricity once again.

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F.3
F
Installing Memory and PostScript
DIMMs
Additional printer memory and the PostScript option are
provided on DIMMs (Dual In-line Memory Modules). This
procedure is applicable to either option.
NOTE:
For using the ML-2550 printer with the PostScript driver,
you need to install an optional PS DIMM.
1
Turn the printer power off and unplug all cables from the
printer.
2
Remove the two screws on the rear of the printer, then
remove the control board cover.

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F.4
3
Locate the PS DIMM slot (the upper slot) and the memory
DIMM slot (the lower slot) on the control board. They are
not interchangeable.
To install the PS DIMM, continue with Step 4.
To install the memory DIMM, go to Step 5.
4
Hold the PS DIMM so that the notch and the connection
point are aligned with the slot as shown, and insert it all the
way into the upper slot labelled “ROM DIMM” at a 90
degrees angle.
5
Hold the memory DIMM so that the notch and the
connection point are aligned with the slot as shown, and
insert it all the way into the lower slot labelled “RAM DIMM”
at a 90 degrees angle.
PS DIMM
Memory DIMM

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6
Replace the control board cover and tighten the two screws.
7
Reconnect the power cord and printer cable, and turn the
printer on.
NOTES:
For PostScript driver installation and usage information
on a Macintosh system, refer to Appendix A, "Using Your Printer
with a Macintosh." For PS printing on a Windows system, refer to
Appendix B, "Using Windows PostScript Driver."

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F.6
Removing the Memory or PS DIMM
1
Follow steps 1 and 2 on page F.3 to access the control
board.
2
Push the clips at each end of the connector slot away from
the DIMM.
3
Place the DIMM in its original packaging or wrap it with
paper and store it in a box.
4
Follow from Step 6 on page F.5.
Installing a Network or Serial
Interface Card
Check if there is missing parts in your package of the optional
interface card.
➐☎Network Interface Card,
SyncThru CD-ROM and
Setup Guide
➐☎Serial Interface Card

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F
Review the precautions on page F.2 and then follow this
procedure to install the network or serial interface card option in
your printer.
1
Unpack the network or serial printer card. Make sure that
there is no missing or damaged part.
2
Turn the printer power off and unplug all cables from the
printer.
3
Remove the two screws on the back of the printer, then
remove the control board cover.
4
Remove the two screws and the bracket from the control
board. You can discard the old bracket.

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F.8
If you are replacing the network interface card with new
one or the serial interface card, remove the two screws and
the old card.
5
Align the connector on the network or serial interface card
with the connector on the control board. Push the card
firmly into the connector until it is completely inserted into
place.
6
Tighten the two screws which you removed in Step 4.

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F
7
Replace the control board cover and tighten the two screws.
8
If you purchase the network interface card supporting the
wireless LAN interface, insert the antenna counterclockwise,
as shown.
9
Connect the network or serial cable, reconnect the power
cord and then turn the printer on.
NOTES:
• For information about configuring and using the printer on a
network environment, refer to the User’s Guide provided with
the network interface card. You can also configure the network
parameters on the control panel; see page E.6.
• Because the network and the serial interface cards are inserted
into the same connector on the control board, you cannot install
both of them.

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F.10
Installing an Optional Paper Tray
You can increase the paper handling capacity of your printer by
installing an optional Tray2. The optional paper tray consists of
two components; the support unit and paper tray.
1
Turn off the printer and unplug all cables from the printer.
2
Remove the tape fastening the interface cable from the
bottom of the support unit.
3
Observe the location of the support unit’s tabs.
Support unit
Paper tray

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F
4
Align the printer with the support unit and lower it into
place on the tabs.
5
Plug the cable into the connector on the back of the printer.
6
Load paper in the Tray2. For information about loading
paper in the tray, see page 2.6.
7
Reconnect the power cord and cables and then turn the
printer on.
NOTE:
When you print a document, configure the printer driver
from your application. To access the printer driver, see page 5.2.
CAUTIONS:
Do not remove Tray 1 from the printer while you are
printing using the optional Tray 2. If you do this, a paper jam may
occur. Use the optional Tray 2 with Tray 1.

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F.12
M
EMO

S
PECIFICATIONS
G.2
Printer Specifications
Item Specifications and Description
Print Speed 24 PPM (A4); 25 PPM (Letter)
Resolution 1200 dpi
First Printing Time Less than 12 seconds
Warm-up Time 50 seconds
Power Rating AC 100 ~ 127 V (USA, Canada) / 220 ~ 240 V (Others),
50 / 60 Hz
Power Consumption 400 W average during operation
Less than 15 W in power-save mode
Acoustic Noise Stand by: Less than 35 dB
Operating: Less than 55 dB
Toner Supply Single cartridge
Toner Cartridge Life 10,000 Pages (for starter, 5,000 Pages), IDC 5% coverage
Duty Cycle Monthly: 100,000 pages maximum
Weight Gross: 17.3 Kg (38.1 lb) / Net: 13.5 Kg (29.8 lb)
Package Weight Paper: 1.83 Kg, Plastic: 0.33 Kg
External Dimensions
(W x D x H)
386 (W) x 436 (D) x 326 (H) mm /
15.2 x 17.2 x 12.8 in. (without options)
Operating Environment Temperature: 10 ~ 32 °C / 50 ~ 90 °F
Humidity: 20 ~ 80 % RH
Emulation PCL 6, PostScript 3 (option for ML-2550), IBM ProPrinter,
EPSON
Random Access
Memory (RAM)
Standard 32 MB
Expandable to 144 MB: 100 pin, SDRAM, 3.3 V; 16 MB,
32 MB, 64 MB or 128 MB available
Fonts 1 bitmap, 45 scalable, 136 PS fonts (option for ML-2550)
Interface Switching Automatic (Parallel, USB, Network)
Interface
• IEEE 1284 Bidirectional Parallel Standard
- Modes supported: Compatible, Nibble, Byte, ECP
• USB Interface Standard
- USB 2.0 compliant
- 480 Mbps 1 port
• Network Interface
- 10/100 Base TX (option for ML-2550)
- 802.11b Wireless LAN (option for ML-2550, ML-2551N)
• Serial Interface(option)

S
PECIFICATIONS
G.3
G
Paper Specifications
Overview
Your printer accepts a variety of print materials, such as cut-
sheet paper (including up to 100% recycled fiber content
paper), envelopes, labels, transparencies and custom-size
paper. Properties, such as weight, composition, grain and
moisture content, are important factors affecting the printer’s
performance and the output quality. Paper that does not meet
the guidelines outlined in this User’s Guide can cause the
following problems:
• Poor print quality
• Increased paper jams
• Premature wear on the printer.
NOTES:
• Some paper may meet all of the guidelines in this guide and still
not produce satisfactory results. This may be the result of
improper handling, unacceptable temperature and humidity
levels, or other variables over which Samsung has no control.
• Before purchasing large quantities of paper, ensure that the
paper meets the requirements specified in this User’s Guide.
CAUTION:
Using paper that does not meet these specifications
may cause problems, requiring repairs. These repairs are not
covered by the Samsung warranty or service agreements.

S
PECIFICATIONS
G.4
Supported Sizes of Paper
NOTE:
You may experience jams when using print materials with
a length of less than 127 mm (5.0 in.). For optimum performance,
ensure that you are storing and handling the paper correctly.
Please refer to “Printer and Paper Storage Environment” on
page G.7.
Tray1/
Tray2 Dimensions
a
Weight Capacity
b
Letter 216 X 279 mm
(8.5 X 11 in.)
60 to 105 g/m
2
bond (16 to 28
lb)
500 sheets of 80
g/m
2
bond
paper
A4 8.3 X 11.7 in.
(210 X 297 mm )
Executive 191 X 267 mm
(7.25 X 10.5 in.)
Legal 216 X 356 mm
(8.5 X 14 in.)
B5 (JIS) 182 X 257 mm
(7.2 X 10 in.)
Folio 216 X 330 mm
(8.5 X 13 in.)
Multi-
Purpose Tray Dimensions
a
a. The printer supports a wide range of media sizes. See “Printing on Card Stock
or Custom-sized Materials” on page 4.22.
Weight Capacity
b
b. Capacity may vary depending on media weight and thickness, and
environmental conditions.
Minimum Size
(custom)
76 X 127 mm
(3 X 5 in.) 60 to 163 g/m
2
bond (16 to 43
lb)
100 sheets of
80 g/m
2
bond
paper
Maximum Size
(custom)
216 X 356mm
(8.5 X 14 in.)
Transparency
Same minimum
and maximum
paper sizes as
listed above.
Thickness:
0.10 X 0.14
mm (0.0039 X
0.0055 in.)
50 typical
Labels
c
c. Smoothness: 100 to 250 (Sheffield)
Thickness:
0.10 X 0.14
mm (0.0039 X
0.0055 in.)
25 typical
Envelopes up to 90 g/m
2
(16 to 24 lb) up to 10

S
PECIFICATIONS
G.5
G
Guidelines for Using Paper
For the best result, use conventional 75 g/m
2
(20 lb) paper.
Ensure that the paper is of good quality, and free of cuts, nicks,
tears, spots, loose particles, dust, wrinkles, voids, and curled or
bent edges.
If you are unsure of what type of paper you are loading, such as
bond or recycled paper, check the label on the package.
The following problems may cause print quality deviations,
jamming or even damage to the printer.
NOTES:
• Do not use letterhead paper printed with low-temperature inks,
such as those used in some types of thermography.
• Do not use raised or embossed letterhead.
• The printer uses heat and pressure to fuse toner to the paper.
Insure that any coloured paper or preprinted forms use inks that
are compatible with this fusing temperature (200 °C or 392 °F
for 0.1 second).
Symptom Problem with
Paper Solution
Poor print quality
or toner adhesion,
problems with
feeding
Too moist, too
rough, too smooth
or embossed;
faulty paper lot
Try another kind of
paper, between 100 ~
250 Sheffield, 4 ~ 5 %
moisture content.
Dropout,
jamming, curl Stored improperly
Store paper flat in its
moisture-proof
wrapping.
Increased gray
background
shading/printer
wear
Too heavy Use lighter paper, open
the rear output tray.
Excessive curl
problems with
feeding
Too moist, wrong
grain direction or
short-grain
construction
• Open the rear output
tray.
• Use long-grain paper.
Jamming, damage
to printer
Cutouts or
perforations
Do not use paper with
cutouts or perforations.
Problems with
feeding Ragged edges Use good quality paper.

S
PECIFICATIONS
G.6
Paper Specifications
Paper Output Capacity
Category Specifications
Acid Content 5.5 ~ 8.0 pH
Caliper 0.094 ~ 0.18 mm (3.0 ~ 7.0 mils)
Curl in Ream Flat within 5 mm (0.02 in.)
Cut Edge Conditions Cut with sharp blades with no visible
fray.
Fusing Compatibility
Must not scorch, melt, offset, or release
hazardous emissions when heated to
200 °C (392 °F) for 0.1 second.
Grain Long Grain
Moisture Content 4 % ~ 6 % by weight
Smoothness 100 ~ 250 Sheffield
Output Tray Capacity
Face-down top output
tray 250 sheets of 80 g/m
2
bond paper
Face-up rear output
tray 100 sheet of 80 g/m
2
bond paper

S
PECIFICATIONS
G.7
G
Printer and Paper Storage Environment
Paper storage environmental conditions directly affect the feed
operation.
Ideally, the printer and paper storage environment should be at
or near room temperature, and not too dry or humid. Remember
that paper is hygroscopic; it absorbs and loses moisture rapidly.
Heat works with humidity to damage paper. Heat causes the
moisture in paper to evaporate, while cold causes it to condense
on the sheets. Heating systems and air conditioners remove
most of the humidity from a room. As paper is opened and used,
it loses moisture, causing streaks and smudging. Humid
weather or water coolers can cause the humidity to increase in
a room. As paper is opened and used it absorbs any excess
moisture, causing light print and dropouts. Also, as paper loses
and gains moisture it can become distorted. This can cause
paper jams.
Care should be taken not to purchase more paper than can be
used in a short time (about 3 months). Paper stored for long
periods may experience heat and moisture extremes, which can
cause damage. Planning is important to prevent damage to
large supplies of paper.
Unopened paper in sealed reams can remain stable for several
months before use. Opened packages of paper have more
potential for environment damage, especially if they are not
wrapped with a moisture-proof barrier.
The paper storage environment should be properly maintained
to ensure optimum printer performance. The required condition
is 20° to 24°C (68° to 75°F), with a relative humidity of 45% to
55%. The following guidelines should be considered when
evaluating the paper’s storage environment:
• Paper should be stored at or near room temperature.
• The air should not be too dry or too humid.
• The best way to store an opened ream of paper is to rewrap it
tightly in its moisture-proof wrapping. If the printer
environment is subject to extremes, unwrap only the amount
of paper to be used during the day’s operation to prevent
unwanted moisture changes.

S
PECIFICATIONS
G.8
Envelopes
Envelope construction is critical. Envelope fold lines can vary
considerably, not only between manufacturers, but also within a
box from the same manufacturer. Successful printing on
envelopes depends upon the quality of the envelopes. When
selecting envelopes, consider the following components:
• Weight: The weight of the envelope paper should not exceed
90 g/m
2
(24 lb) or jamming may occur.
• Construction: Prior to printing, envelopes should lie flat with
less than 6 mm (0.25 in.) curl, and should not contain air.
• Condition: Envelopes should not be wrinkled, nicked, or
otherwise damaged.
• Temperature: You should use envelopes that are compatible
with the heat and pressure of the printer.
• Size: You should only use envelopes within the following size
ranges.
NOTES:
• Use only the Multi-Purpose Tray to print envelopes.
• You may experience some paper jams when using any media
with a length less than 127 mm (5.0 in.). This may be caused by
paper that has been affected by environmental conditions. For
optimum performance, make sure you are storing and handling
the paper correctly. Please refer to “Printer and Paper Storage
Environment” on page G.7.
Minimum Maximum
Multi-Purpose
Tray
90 X 148 mm
(3.5 X 5 in.)
216 X 356 mm
(8.5 X 14 in.)

S
PECIFICATIONS
G.9
G
Envelopes with Double Side Seams
Double side-seams construction has vertical seams at both ends
of the envelope rather than diagonal seams. This style may be
more likely to wrinkle. Be sure the seam extends all the way to
the corner of the envelope as illustrated below.
Envelopes with Adhesive Strips or Flaps
Envelopes with a peel-off adhesive strip or with more than one
flap that folds over to seal must use adhesives compatible with
the heat and pressure in the printer. The extra flaps and strips
might cause wrinkling, creasing, or even jams and may even
damage the fuser.
Envelope Margins
The following gives typical address margins for a commercial
#10 or DL envelope.
NOTES:
• For best print quality, position margins no closer than 15 mm
(0.6 in.) from the edges of the envelope.
• Avoid printing over the area where the envelope’s seams meet.
Envelope Storage
Proper storage of envelopes helps contribute to print quality.
Envelopes should be stored flat. If air is trapped in an envelope,
creating an air bubble, then the envelope may wrinkle during
printing. See “Printing on Envelopes” on page 4.14.
Type of Address Minimum Maximum
Return address 15 mm (0.6 in.) 51 mm (2 in.)
Delivery address 51 mm (2 in.) 89 mm (3.5 in.)
Correct
Incorrect

S
PECIFICATIONS
G.10
Labels
CAUTIONS:
• To avoid damaging the printer, use only labels recommended for
laser printers.
• To prevent serious jams, always use the Multi-Purpose Tray to
print labels and always use the rear output tray.
• Never print on the same sheet of labels more than once and
never print on a partial sheet of labels.
When selecting labels, consider the quality of each component:
• Adhesives: The adhesive material should be stable at 200 °C
(392 °F), the printer’s fusing temperature.
• Arrangement: Only use labels with no exposed backing
between them. Labels can peel off sheets with spaces
between the labels, causing serious jams.
• Curl: Prior to printing, labels must lie flat with no more than
13 mm (.5 in.) of curl in any direction.
• Condition: Do not use labels with wrinkles, bubbles, or other
indications of separation.
See “Printing on Labels” on page 4.17.
Transparencies
Transparencies used in the printer must be able to withstand
200 °C (392 °F), the printer’s fusing temperature.
CAUTION:
To avoid damaging the printer, use only transparencies
recommended for use in laser printers.
See “Printing on Transparencies” on page 4.19.

1
A
antenna, connect
2.12
B
booklet printing
5.17
C
cancel, print job
5.5
card stock, print
4.22
cleaning sheet, print
6.9
components
1.5
configuration page, print
6.2
connect
Ethernet
2.12
network antenna
2.12
parallel
2.10
power cord
2.13
USB
2.11
control panel
3.2
buttons
3.3
display
3.2
menus
3.5
custom-sized materials, prnt
4.22
D
demo page, print
2.14
display language, change
control panel
2.14
printer driver
2.20
double-sided printing
5.11
E
envelopes, print
4.14
error messages
7.20
Ethernet cable, print
2.12
F
face down output tray
4.5
face up output tray
4.6
Favorite setting, use
5.6
features
printer
1.2
printer driver
2.16
G
graphic properties, set
5.25
H
help, use
5.6
I
image mode
5.26
install
PPD files
B.2
printer driver for Macintosh
A.2
printer options
F.1
Remote Control Panel
D.2
SPL driver for Linux
C.2
SPL driver for Windows
2.17
toner cartridge
2.4
L
labels, print
4.17
Linux
common problems
7.25
configuration tool
C.8
driver, install
C.2
LLPR properties
C.10
load, paper
in the Multi-Purpose Tray
4.8
in the Tray1/optional Tray 2
2.6
using the manual feed
4.12
INDEX

2
M
Macintosh
common problems
7.23
desktop printer, create
A.4
document, print
A.6
driver, install
A.2
system requirements
A.2
manual feed mode, use
4.12
memory DIMM, install
F.3
Multi-Purpose Tray, use
4.8
N
network antenna, connect
2.12
network interface card, install
F.6
network printing
cable/antenna, connect
2.12
card, install
F.6
locally shared printer, set
E.3
network-connected printer, set
E.5
parameters, configure
E.6
n-up printing
5.13
O
option, install
memory DIMM
F.3
network interface card
F.6
paper tray 2
F.10
PS DIMM
F.3
serial interface card
F.6
optional tray, install
F.10
orientation, select
5.3
output location, select
4.5
overlay, use
5.21
P
paper
choose
4.2
load
2.6
sizes and capacities
4.3
specifications
G.3
paper jam
around the toner cartridge
7.10
in the duplex area
7.13
in the paper exit area
7.12
in the paper feed area
Multi-Purpose Tray
7.9
optional Tray 2
7.8
Tray 1
7.7
tips for avoiding
7.14
paper level bar
4.7
paper properties, set
5.7
paper size,set
5.7
paper source, set
5.8
paper type, set
5.8
parallel cable, connect
2.10
poster printing
5.16
PostScript driver
access, in Windows
B.6
errors
7.24
install, in Macintosh
A.2
install, in Windows
B.2
preprinted paper, print
4.21
print order, set
5.28
print quality problems
7.15
print quality problems, solve
7.15
print resolution, set
5.25
printer software
install
in Linux
C.2
in Macintosh
A.2
in Windows
2.17
reinstall
in Windows
2.18
uninstall
in Linux
C.7
in Windows
2.19
printing
booklets
5.17
configuration page
6.2
demo page
2.14
double-sided
5.11
fitting to a selected paper
5.15
from Macintosh
A.6
from Windows
5.2
multiple pages on one sheet
5.13
posters
5.16
reduced/enlarged document
5.14
using overlays
5.21
watermarks
5.18
printing problems
7.3
problem, solving
checklist
7.2
DOS
7.27
error messages
7.20
general
7.3
Linux
7.25
Macintosh
7.23
paper jams
7.7
print quality
7.15
PS errors
7.24
Windows
7.22
PS DIMM, install
F.3

3
Q
quality problems, solve
7.15
R
rear output tray, use
4.6
Remote Control Panel
install
D.2
start
D.4
tabs
D.5
uninstall
D.3
S
serial interface card, install
F.6
specification
paper
G.3
printer
G.2
system requirements
for Linux
C.2
for Macintosh
A.2
for Windows
2.17
T
toner cartridge
install
2.4
maintain
6.3
redistribute
6.4
replace
6.6
Toner Save mode, use
5.9
top output tray, use
4.5
transparencies, print
4.19
Tray 1, use
2.6
turn on, printer
2.13
U
uninstall
Linux
C.7
Remote Control Panel
D.3
Windows
2.19
unpack
2.2
USB cable, connect
2.11
USB driver, install
in Windows 98/Me
2.20
W
watermarks, use
5.18

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