Dascom DP-541 Operator's Manual

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FCC Part 15 Class B

This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device
may not cause harmful interference, and (2) this device must accept any interference received, including interference that
may cause undesired operation.

This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the
FCC rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee
that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct
the interference by one or more of the following measures:

 Reorient or relocate the receiving antenna.
 Increase the separation between the equipment and the receiver.
 Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
 Consult the dealer or an experienced radio/TV technician for help.

This equipment complies with Canadian and FCC radiation exposure limits set forth for an uncontrolled environment. This
equipment is in direct contact with the body of the user under normal operating conditions. This transmitter must not be co­located or operating in conjunction with any other antenna or transmitter.

Normal use, please keep the torso down 50 mm distance
Part 15.21 Caution: Changes or modifications not expressly approved by Dascom, could void the user’s authority to operate

the equipment.

Canadian Department of Communications Radio Interference Statement

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product unsafe to operate. The print head and motors get hot during use. Wait until they cool before touching them. Make certain the printer
is disconnected from AC power before removing any covers or performing any required cleaning or maintenance. Connecting this printer
to an ungrounded receptacle can result in electrical shock. Never place the printer near inflammable or explosive substances. Do not
operate near liquid or spill liquid into the printer at any time.

Enthält keine Teile, die vom Bediener instandgesetzt werden können. Bitte wenden Sie sich bei Instandsetzung oder Reparatur an
qualifiziertes Kundendienstpersonal. Die Verwendung von echten Dascom Ersatzteilen ist notwendig, um ordnungsgemäßen, sicheren
Betrieb zu gewährleisten. Änderungen oder Modifikationen dieses Geräts machen die Garantie ungültig und können den sicheren Betrieb
des Produkts gefährden. Während des Druckens werden Druckerkopf und Motoren heiß. Warten Sie, bis sich die Teile abgekühlt haben,
bevor Sie sie berühren. Vergewissern Sie sich, dass der Drucker nicht mehr an die Stromquelle angeschlossen ist, bevor Sie Abdeckungen
abnehmen oder das Gerät reinigen bzw. warten. Schließen Sie diesen Drucker nicht an eine ungeerdete Steckdose an; dies kann zum
Elektroschock führen. Setzen Sie den Drucker niemals in die Nähe von feuer- oder explosionsgefährlichen Stoffen. Betreiben Sie den
Drucker nicht in der Nähe von Flüssigkeiten und lassen Sie keine Flüssigkeiten in den Drucker gelangen.

Specifications are subject to change without notice.

1 www.dascom.com

TABLE OF CONTENTS

Introduction ......................................................................................................................................................... 2 

Printer Features .................................. .............................................................. ................................................ .. 3

Quick Start Instructions ...................................................... ..... ........................................... ..... ................... ....... 4 

A. Paper Load ................................................................................................................ ............................... 4

B. Battery Installation .................................................................................................................................... 5 

C. Charge Battery .......................................................................................................................................... 5

D. Power On ................................................................................................................................. ............... .. 5

E. Control Panel ............................................................................................................................................ 6

F. Performing a Printer Self-Test ................................................................................................................ .. 6

Configuration .................................................................. ........................................................................ ............ 7 

A. Connectivity Parameters ............................................................................................ .............. ................. 8 

B. Image Parameters .................................................................................................................................. 12

C. Device Config ......................................................................................................................................... 13 

D. Fonts ....................................................................................................................................................... 15

E. Graphics ............................................. ................................. ............................ .................... .............. ..... 16

F. Update Printer Firmware, Upload Files to Printer Memory ..................................................................... 17

G. Reset Printer Configuration to Factory Defaults (Safe Mode) ................................................................ 17

Printing Modes .................................................................................................................................................. 18

A. ASCII Based Print Jobs .......................................................................................................................... 18

B. Graphic Based Print Jobs ...................................................................................................................... . 18

Integrating the Printer into your Business Applications .............................................................................. 19

A. Windows Desktop Computers ................................................................................................................ 19

Print Drivers .......................................................................................... ........................................... ............... 19 

I. USB ........................................................ ......................................................... .................................. 19

II. Wi-Fi ....................................................... .................................................... .................................. ..... 20

B. Windows Tablets and Smartphones ....................................................................................................... 20

C. Android Tablets & Smart phones ............................................................................................................ 20

I. Wi- Fi ......................................................................... ................................................ ................... ..... 21

D. Apple™ Tablets & Smartphones ....... ............................. ............................. ............................ .............. . 21

I. Wi-Fi ......................................... ............................................... .................................. ................... ..... 21

Media ...................................................................................................................... ........................................... 22 

A. Standard Media ................................................................................. ................................................ ..... 22

B. Black Mark Media Position .......................... ..... .............................................................. ..... ................... 22

Maintenance and Troubleshooting ....................................................................................................... .......... 23 

A. Cleaning .................................................................................................................................................. 23

B. Battery Care ............................................................................................................................................ 23

I. Getting the Maximum Battery Life . ............................................................. ....................................... 23

II. Charging the Battery .......................................................................................................................... 23

III. Additional Battery and Safety Information ......................................................................................... 24

IV. Testing the Power Adapter and Battery ............................................................................................. 24

C. Troubleshooting ................... .................................................................................................... ............... 25 

I. General Error Conditions ............................................................................. .... .................................. 25

II. Fault Description and Resolution ....................................................................................................... 25

D. Obtaining Service ............................................. ..... .... ............................................................................. 26

APPENDIX ..................................................... ...................................... ............................ ................... .............. . 27

A. Appendix A – DP-541Printer Specifications ........................................... ................................. ............... 27 

B. Appendix B – Supplies and Accessories ................................................................................................ 28 

C. Appendix C – Media ............................................................................................................................... 29

D. Appendix D – Mounting Options ............................................................................................................. 29



Glossary of Terms ............................................................................................................................................ 30 

Index ......................................................... ............................................... ...................................... .................... 32



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Introduction

Thank you for purchasing the Dascom DP-541 Series mobile thermal printer also referred to in this
manual as the “DP-541”. The DP-541 series prints on special thermal media supplied in roll form up to

4.1 inches wide. All models are equipped with a USB port which supports cabled communications.
All models support an optional internal Wi-Fi interface. Complete specifications may be found in

Appendix A – DP-541Printer Specifications

.

The remainder of this manual focuses on preparing the printer for initial use and performing tasks that
will be encountered during daily use.

Maintenance

describes how to maintain the printer for optimal performance and has information on

how to diagnose any problems that may occur.
Dascom recommends using genuine Dascom supplied media and accessories. For detailed lists and

contact information, please see Appendix B – Supplies and Accessories

&Appendix C – Media.

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Printer Features

Your DP-541features:

 Easy-to-read control face and simple drop-in paper loading
 Quickly prints a wide variety of tickets, and receipts.
 IP54 rated for water and dust resistance... plus rated for repeated 6-foot drops to concrete
 Print speeds up to 5 ips
 Extensive fonts, character sets, bar codes and graphic capabilities
 Printer configuration is quick and easy with a web based interface
 The latest in battery technology provides for full-shift printing in all modes
 Compatible with Windows, Windows Mobile, Apple iOS, and Android
 Emulations that allow the printer to be a drop-in replacement for nearly any mobile printer

For detailed specifications reference Appendix A – DP-541Printer Specifications

.

USB Data Port

Control Panel

Door Release Button

Power Port

Paper Compartment Door

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Quick Start Instructions

A. Paper Load

Press Paper Compartment Door
release button to open. Pull small
leader of paper out and close
door; “clicks” when properly
closed.

NOTE: When using 3” paper,
install spacer P/N: 93194

Tear paper
towards back of
printer

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B. Battery Installation

C. Charge Battery

Uncover the printer ports and plug in your AC power adapter to the Power port (must be a Dascom­supplied accessory). The yellow LED will show solid ON while the printer battery is charging.

D. Power On

Depress the Power button on the control panel. The green LED and the red LED will both be lit while
the printer is going through its startup sequence (about 10 seconds). The red LED will go off, leaving
the green LED on to indicate the printer is ready to print.

Press button to see
Battery charge level.
4 LED 100% charge
3 LED 75%
2 LED 50%
1 LED 25%

Loosen hand strap
(not pictured) to
access battery
door.

Use Bay Chargers or
AC/DC Power
Adapter to charge.

Please contact your Printek
Sales representative for price
and availability.

Rotate knob 1800
to unlock battery
door.

Drop in battery.
Close battery door

and rotate knob
180

0

to lock.

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E. Control Panel

Control Panel

Power Button

Power Up
Power Down
Toggle IP over USB
on/off

Press & Release
Press & Hold
Press twice

Paper Feed Button

Advance paper
Print Setup Report

Press once
Press twice

Power & Status
(Green/Red)

Battery
(Yellow)

Alert
(Red)

Indication

On Off On Booting up
On Off Off Ready

On Off Flashing Paper Error/Lid Open
Flashing Off Off Job is arriving
Flashing Off Off Job is printing
Flashing Off Flashing IP over USB active

Solid, Flashes Off Every 2

Seconds

Off

Off

Wireless Personal Area
Network active

Solid

Charging Battery

Flashing

Battery Low

F. Performing a Printer Self-Test

With power on, press the paper feed button twice quickly.

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Configuration

Configuration of the DP-541 printer is done through a built-in web page. This allows you to configure
the printer from any device that has a browser and is compatible with your DP-541 communication
capabilities.

1. Turn the printer ON.

2. Connect a USB cable between the printer and a PC.

3. To access the DP-541 web page, push the Power button twice rapidly. This will put the printer
into Configuration mode.

4. When the printer is in Configuration mode the POWER and FAULT LEDs will flash together.
a. Open browser on your PC and type 169.254.200.1

into the address bar of the browser and hit

Enter - A login box should appear:



b. Type “0000” and hit Enter- you should now be at the home page for DP-541 Configuration.

FP541 Configuration Interface

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5. The main configuration screen of the DP-541:

This is an overview of the printer configuration. The battery icon shows the relative charge in the
battery. The more bars, the higher the charge. An AC plug will appear in the battery icon when the
printer is plugged into an external power source.

To return the printer to normal operating mode, double-click the Power button. The POWER LED will
be returned to a solid light.

At the top of the Main Page are selections to access the sub-menus.

Wherever the book icon appears in the printer configuration pages, click it to access the user

manual pages for help.

A. Connectivity Parameters

This page allows you to setup the connection to your printer. Depending on the optional interface
installed, you will see WI-FI Config. In the detailed descriptions, an asterisk (*) indicates the factory
default value.

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WI-FI Config:

Wireless Configuration

This will display the current Wi-Fi configuration:

IP Address – user defined. If Static Address Method is selected, type in the address the printer will use
on the network.

SubNetMask – user defined. If Static Address Method is selected, type in the subnet mark of the
network.

GateWay – user defined. If Static Address Method is selected, type in the gateway address of the
network.

WiFi Port – user defined. Type in the IP port to be used by the printer. (default value = 8023)

Address Method – user selectable

Static – printer will always connect to the network using the IP address defined.
DHCP – printer will acquire an IP address from your network DHCP server
Personal Area Network –The printer will broadcast itself as a network connection. The Power LED will

flash off every two seconds while in this mode. The SSID will be the serial number of the printer.

When connecting to the printer, the passphrase is the printer’s serial number.
Personal Area Network mode can also be activated outside of the printer web page.

To enter Personal Area Network mode, press and hold the Power and Paper Feed buttons until the
Power and Alert LEDs light. Release both buttons, and the printer will restart in Personal Area Network
mode. To exit Personal Area Network mode, press and hold the Power and Paper Feed buttons until
the Power and Alert LEDs light. Release both buttons, and the printer will restart in normal Wi-Fi mode.

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Available Networks

– access points detected by the printer will be displayed. Select Add/Connect to use one

of these access points.

Previously Connected Networks – access points detected by the printer or added through Add/Edit

Network will be displayed. Select Connect to use one of these access points, or Remove to delete it from
printer.

Currently Configured Networks – access points added through Add/Edit. They may not have been

connected yet. Select Remove to delete access point from printer.

Set Date

– Some Enterprise network connections require this setting. Simply enter the current year.

Add/Edit Network

Enter the SSID of a network connection. If authentication is used select the authentication type. Click Next.
The following form will change depending on the authentication type:

WPA-PSK

Enter the password for the network connection.

WPA-EAP or IEEE8021X

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These are Enterprise network settings. Consult your server manual for recommended settings.

Upload Digital Certificate

If your enterprise network uses digital certificates as another form of authentication, you can upload the
certificates here.

B. Image Parameters

This page allows you to make selections about the image to be printed.

Current Emulation:

Possible Values: ZPL, CPCL, ESCPOS, IPL, AUTOIMAGE, PDF, POSTSCRIPT, IMAGE

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The DP-541 printer is capable of using several different emulation modes. This feature sets the family of printer
commands that may be used by a host application program to control the various capabilities of the printer. The
printer will only respond to commands valid for the currently selected emulation. For more information, please
refer to the Integrator’s Guide.

Besides the popular printer languages to choose from, the following selections allow the DP-541 to print many
other file formats directly, without the need for a driver.

AUTOIMAGE – selected when mixed PDF and POSTSCRIPT images are sent to the printer. The printer will
determine which type of file has been sent. This can increase printer response time.

PDF – When in this mode the printer will directly print Portable Document Files (PDF).
POSTSCRIPT – When in this mode the printer will directly print Postscript formatted files (.ps). You can also

use a generic Postscript driver to print when in this mode.
IMAGE – selected if just image files are being sent to the printer. When in this mode the printer will directly print

the following file types: .png, .jpg, .bmp, .pbm, .svg, .tiff

Default Font:

The DP-541 has the ability to use True Type Fonts. All True Type Fonts loaded into printer memory are listed
here. When using emulations that do not specify the font for each line of text, select the font you would like to
use as the default font. All print jobs will use the default font unless a command is sent to the printer to use
another font.

Chars Per Inch and Default Text Line Spacing:

This determines how large the characters are and how many characters will print in a one inch space. The
higher the number, the greater the number of lines per vertical inch of print.

C. Device Config

This page allows you to set certain hardware parameters on the printer.

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Login Password

This allows the printer webpage password to be changed.

Units

Select between inches or millimeters. If you change units, do so before entering other settings.

Max Paper Speed

Possible values: 1.0 to 5.0 ips, Default = 5.0

When using labels or heavy paper stock, you may need to decrease the paper speed to prevent paper jams.

Mark Seeking

Possible values: Off *, Front, Rear, Gap. (Note: Rear and Gap are available only on 541L models).

Set the value when using regular or label media with black alignment marks or label media with gaps between
the labels

Sensor Brightness

Possible values 0-100%. This displays the reflectivity or light transmission of the media, depending on the
setting for Mark Seeking. This value is updated once per second.

Note: Before adjusting black mark thresholds, set Mark Width to match the width of the black mark or
label gap on your media.

Front Paper Sensor Threshold

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When using paper with a black on the front adjust this setting to insure the paper stops at the black mark.

1. With the lid closed and the black mark not over the front paper sensor, note the Sensor Brightness.

2. Open the paper lid and hold the paper against the front paper sensor so that the black mark is over the
sensor. Note the Sensor Brightness.

3. Set Threshold = black mark brightness + ((paper brightness – black mark brightness) / 2) and click Submit
Changes. Example: black mark brightness = 10%, paper brightness = 80%.

Threshold = 10% + ((80% - 10%) / 2) = 45%.

4. Close lid and press paper feed. The paper should stop with the bottom of the form at the tearbar.

Rear Paper Sensor Threshold

This is set the same as the front paper threshold, but using the rear (in lid) paper sensor and the Rear Sensor
Brightness.

Gap Paper Sensor Threshold

When using labels without a Black Mark, adjust this setting to insu re the labe l stop s at the gap in between labels.

1. Remove 2 labels from the backing paper, and close the lid so the backing is over the paper sensor. Note
Sensor Brightness for Gap.

2. Open the lid and close it so a label is over the paper sensor. Note Sensor Brightness for Gap.

3. Set Gap Threshold = label brightness + ((backing brightness – label brightness) / 2) and click Submit
Changes.

4. Close lid and press paper feed. The paper should stop with the bottom of the form at the tearbar.

Backup Distance Before Printing

Used with Mark Seek. User defined. This is the distance the printer will pull in the paper before starting to print.

Max Mark Search Distance

Used with Mark Seek. User defined. This is the distance the printer will advance paper to seek the mark before
displaying a Paper Out condition.

Stop Distance after Mark

Use with Mark Seeking. User defined. This is the distance the printer will advance the paper after the mark is
detected.

Left Margin

Setting this value will tell the printer how far from the left edge of the paper to start the print job.

Contrast

Possible values 0 – 10. Default value is 5

The lower the value the lighter the print. The higher the value the darker the print.

Paper Energy Values

This is a locked value. These settings are supplied by the paper manufacturer. The default settings cover most
grades of paper. If you are using non-standard paper consult the paper manufacturer for recommended settings.

Auto Off Timer

Possible values 0 – 1440 minutes. Default value is 60.

This timer will turn the printer off if it has not been used for the time set. Disable this feature by s ettin g the time
at 0. The printer will give a 1 minute warning before shutting off.

D. Fonts

15 www.dascom.com

Upload Font File

Truetype Fonts (.ttf, .otf, .ttc and .bdf) can be uploaded here.
Languages like ZPL and CPCL can use the fonts by referring to them by their Font Family Name.

Font Aliases

Languages like ZPL and CPCL can use an uploaded Font Alias Table so legacy jobs can have their font names
mapped to other uploaded fonts. Contact Dascom retailer for more information.

E. Graphics

This menu will allow you to load a graphics file into printer memory for use in creating your output. For instance,
logos can be stored for recall and use by your host program (see Integrator’s Guide for more details).

16 www.dascom.com

Upload File

Select the graphics file to load into printer memory. Acceptable graphics formats
are .jpeg, .pbm, .pcx, .bmp, .png and .svg.

Set Width

Select the width you want to use to display your logo: full width, half width, or quarter width.

Set index

Depending on the Index value used, you can automatically print the graphics file as a header (prints at the
beginning of the print job), footer

(prints at the end of a print job) or use the graphics print command to print

anywhere on your receipt or label. See Integrator’s Guide for more information on graphics commands.
When selecting header, the graphics file will automatically print the logo at the beginning of each print job.

When selecting footer, the graphics file will automatically print the logo at the end of each print job.
You must set each of these values before selecting Upload Logo or the default values will be associated with

your image.

Current Logo Mapping

Once uploaded into the printer memory, your image and settings will be displayed here.

F. Update Printer Firmware, Upload Files to Printer Memory

17 www.dascom.com

Printer Application Updates, OEM information and Manuals and more can be uploaded here. Contact Dascom
retailer for more information.

G. Reset Printer Configuration to Factory Defaults (Safe Mode)

Printer settings can be restored to factory configurations.
Note that WIFI network configurat ions will be lost when Network Config to Factory Defaults is checked.

18 www.dascom.com

Printing Modes

There are two fundamental printing modes with mobile printers.

A. ASCII Based Print Jobs

The host sends the print job as a series of lines of characters, some of which represent the
text to be printed, while other portions are command codes which tell the printer which font
to use, where to locate the text, what barcodes to use, etc. These text-based files are
encoded in a print language specific to the target printer.

The DP-541 understands ASCII based jobs in several different print languages. Refer to
the Appendix

or the Integrator’s Guide for the list of print languages supported.

B. Graphic Based Print Jobs

The host assembles the printed image as a series of lines of dots, and transmits this image
as a sequence of data bytes that represent the dot patterns assembled. Often these jobs or
files have some control characters on the front end and / or rear end of the dot pattern bytes
to define their format, help control pagination, etc.

Windows drivers in particular encode the image as a graphic based print job before it is
passed along to the printer.

In addition to accepting graphic jobs from its Windows driver, the DP-541 can accept and
print directly many other graphic image file types. This opens up the option to print job
images from a variety of devices for which drivers or print utilities don’t exist, such as some
tablets and smartphones.

Please see the Integrator’s Guide or your system integrator for more details.

19 www.dascom.com

Integrating the Printer into your Business Applications
Step by Step – Creating a Link from Host to Printer

A. Windows Desktop Computers
Print Drivers

You may download the appropriate Windows driver from our website. Install the printer driver by the
standard method for your version of Windows.

I. USB

a) Install the printer driver onto your hostbefore connecting the printer. Follow prompts

displayed during installation.
b) Plug the printer into a USB port on your host system using a mini-USB cable.
c) The printer will appear in the “Unspecified” devices section. Right click on the icon.
d) In the popup window, select the Hardware tab. Note the USB port number displayed.
e) Using the “Add Printer” wizard, install the printer using the driver file obtained from Dascom

and the USB port number noted above.
f) After the printer driver installs, the printer will appear as “Dascom 4-inch printer” under the

“Printers and Faxes” heading of your Windows “Devices and Printers” screen.

II. Wi-Fi

Note

: The following instructions are fundamentally the same for an Infrastructure or Wi-Fi Direct (peer

to peer) setup. They also assume that you have already configured your Wi-Fi interface via the DP­541 printer web page (see the section on Configuration).

a) Perform a configuration printout to verify the printer Wi-Fi setup and to record the IP

address assigned and the Port number.
b) Install the printer as a local printer using the USB instructions above.
c) In the “Devices and Printers” screen, right click the printer icon representing your mobile

printer.
d) Under Printer Properties, select the Ports tab, then select “Add a Port”
e) In the new dialog box which appears, select “Standard TCP/IP ports”; this will open the

Standard TCP/IP Printer Port wizard.
f) Follow the on-screen prompts in this wizard. You’ll use the IP address recorded above to

set up the port. In the same screen you can also name the port somet h ing familiar and

relevant, and this will appear as the name of the printer to the user.
g) After the port is detected, it will be displayed as a “generic network card” – accept this by

clicking Next / Finish.
h) After you are finished adding the port, Windows will report it as a “Standard TCP/IP port”;

click OK to accept this.
i) Close the Printer Port window.
j) Now in the Printer Properties dialog box your IP address (or the familiar name you

assigned above) will appear in the list of ports available. Select it to configure the port.

20 www.dascom.com

k) Windows defaults standard TCP/IP ports to port number 9100. The DP-541 Wi-Fi port

number is internally set to 8023. Change the port number to 8023 in the Windows screen

and click OK.
l) Click “Apply” in the Printer Properties box.
m) Your DP-541 printer driver should now be properly coupled to the Wi-Fi parameters you

have chosen.

B. Windows Tablets and Smartphones

This feature and/or specific directions for use were not available as of this printing.

C. Android Tablets & Smart phones

I. Wi- Fi

This feature and/or specific directions for use were not available as of this printing.

D. Apple™ Tablets & Smartphones

I. Wi-Fi

This feature and/or specific directions for use were not available as of this printing.

21 www.dascom.com

Media

A. Standard Media

Dascom offers a variety of media types. See Appendix C

for detailed descriptions and ordering
information. You may also visit our website or contact your Dascom Mobile sales representative for a
complete and up to date description of our consumables and accessory products.

B. Black Mark Media Position

For automatic ticket printing, the Black Mark should be positioned as shown in the figure below.
When using Mark Sensing mode (see Configuration

, earlier in this document), FieldPro printers will
automatically position the output for tear-off and printing following a Form Feed command or by
pressing the Paper Feed button.

For non-automatic paper positioning, refer to the Integrator’s Guide for sensing and positioning
commands.

22 www.dascom.com

Maintenance and Troubleshooting

A. Cleaning

In normal environments, the printer should be cleaned after printing a few rolls of paper or if there are
voids in the printout. For optimum performance and life, you should clean the Print Head and Platen
Roller whenever you load new paper.

To clean the printer areas as described below, use a Thermal Head Cleaning Pen and MCR Cleaning
Card available from Dascom, or you may use cotton swabs moistened with isopropyl alcohol.

 Turn the printer off. Open the Paper Door and remove the paper.
 Using a Thermal Head Cleaning Pen, clean the white ceramic surface on the Print Head.

Caution

: Do not use sharp objects to clean the print head. This may damage the printer and

require service. Such damage is not covered under warranty.

 Clean the Black Mark Sensor below the print head.
 Clean the Tear Bar.
 Clean the Platen Roller. Turn the Platen Roller with your finger to clean the entire surface.
 If a Magnetic Card Reader is installed, pass and MCR Cleaning Card through the MCR slot to

clean the head.

You may also experience a buildup of paper dust in the printer. This may be removed using a can of
compressed air or by vacuuming.

To clean the exterior of the printer, turn the printer off and use a soft cloth moistened with a mild
detergent.

B. Battery Care

I. Getting the Maximum Battery Life

New batteries are shipped in an “uncharged” state and must be charged for at least 4 hours prior to
the first use. Maximum battery capacity is not reached until after completing a minimum of three
complete charge and discharge cycles.

II. Charging the Battery

 Plug the power adapter into a power source appropriate for the adapter being used.
 Plug the power adapter into the power connector on the side of the printer. The printer’s

battery charging circuitry will analyze the condition of the battery and begin charging it if
necessary.

 If the batte ry is not fully charged, charging will begin and the Battery Indicator will illuminate.
 When the battery is fully charged, the Battery Indicator will turn off. Charging may take up to 8

hours (4 hours with external desktop charger accessory) depending on the condition of the
battery.

 The printer may be used while the battery is charging, but this will extend the time required to

fully charge the battery.

23

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24 www.dascom.com

C. Troubleshooting

When encountering problems, the cause may be the printer or may sometimes be due to other
problems with your system. Please review the following tables to solve common problems you may
encounter with your printer. You may also visit www.dascom.com

for additional “FAQ’s” that may

assist you.
If you are still unable to solve your problem, please contact the company from whom you purchased

your printer since they are most familiar with your systems.

I. General Error Conditions

Whenever the printer detects an error condition the Alert (red) Indicator will either flash or stay on. In
some cases the audible alarm will also sound. Please refer to the following table for a list of what
causes these conditions and how they may be corrected.

Error Indicator Possible Cause Solution

Flashes Paper Out or Paper Door not fully

closed

Make sure the door is fully
closed by opening the door
and closing it again until the
door “clicks” closed. Check
the platen roller for damage.

Stays On, With Alarm Print job too large for printer

memory

Divide long documents into
individual pages.
Printer power must be cycled
to clear error.

II. Fault Description and Resolution

Problem Possible Cause Solution

Printer will not turn on. Battery not installed properly Remove and reinstall battery

making sure the battery is
seated with door closed.

Discharged battery Recharge battery.

Printer turns itself off. Battery discharged Replace or recharge battery.

Electrostatic discharge May occur in extreme low

humidity conditions. Turn
printer back on with power
button.

Battery Indicator does not
light or does not stay lit when
power adapter is connected.

Battery already fully charged No action required.
Power supply not receiving

power

Check building/veh icl e cir cui t
breakers/fuses.

Faulty power adapter Check output of power

adapter with voltmeter.
Should be 19 VDC.

Battery not charging. Faulty power adapter or

battery

Try new power adapter, or
replace battery.

Poor print quality. Low battery Check and recharge battery.

25 www.dascom.com

Problem Possible Cause Solution

Print head dirty Clean print head. Refer to

“Maintenance

” section of this

document.

Poor quality or “old” paper Verify paper from approved

source. Try new roll of
paper.

Paper not feeding. Obstruction in paper path, or

paper improperly installed

Check paper path and
reinstall paper (see “Quick

Start Instructions”).

Poor quality paper Verify paper from approved

source.

Paper Door not fully closed Verify door is closed.

Paper does not advance to
black mark reliably.

Dirty Black Mark/Paper
Sensor

Clean Sensor as described
in “Maintenance

” section of

this document.

Black Mark density/contrast Adjust Mark Sensitivity as

described in Device Settings
Menu .

Paper not feeding reliably or
print is compressed vertically

Poor quality paper Verify paper from approved

source.

Heavy or thick forms;
specialty paper with slick
finish

Lower the Max Paper Speed
as described in Device
Config Menu .

Paper Door not fully closed Verify door is closed.

Print Garbled. Low Battery Check and recharge battery.

Improper Interface
configuration

Verify printer and host
settings match.

Paper Door not fully closed Verify door is closed.

Printer will not print. Low Battery Check and recharge battery.

Paper not loaded correctly Check paper path and

reinstall paper (see “Quick

Start Instructions”).

Improper Interface
configuration

Verify printer and host
settings match. Print a self­test to verify printer settings
and to verify printer is
functioning properly.

D. Obtaining Service

If service is required for your printer, please contact the company where you purchased your printer.
If they are unable to assist you, contact Dascom retailer to obtain a Return Authorization Number.

Printers without Return Authorization will not be accepted.

26 www.dascom.com

APPENDIX

A. Appendix A – DP-541Printer Specifications

Printing Specifications

Printing Method: Direct thermal.
Printing Resolution: 203 dpi (8 dots per
mm).
Printing Speed: Up to 5 ips.
Printing Width: Up to 4.1 inches (104
mm).

Fonts/Characters/Bar Codes

Fonts: Virtually all TrueType fonts, from
6 cpi to 34 cpi depending on emulation
chosen, plus scaling.
International Characters: All common
sets available via UTF-8 encoding.
Unicode support.
Bar Codes: Virtually all 1D and 2D
codes supported, depending on
emulation chosen.
Downloadable firmware, fonts,
graphics, and logos.

Connectivity

Standard (All Units): USB 2.0 PNP.
USB-C input connector.

Wireless Options:

Wi-Fi 802.11b/g/n compatible

Software

Drivers and Utilities: Drivers for XP,
WIN 7, WIN 8, WIN 10.
Compatible with Windows CE/Pocket
PC, Windows Mobile, Apple iOS,
Android. Print utilities and SDK’s for all
platforms. Native App and Web printing.

Printer Setup via internal web page,
access with browser from any host
(tablets and smartphones included).





Emulations: Emulates many popular
printer brands and languages including:
Zebra CPCL and ZPL, Extech, IPL, and
ESC POS. Firmware can be upgraded
as new emulations become available.
Supports direct printing of Postscript,
PDF, PBM, JPG, PNG, BMP, SVG, &
TIFF files.

Print Media

Paper Type: Direct Thermal Roll.
Roll Size: Maximum roll diameter 2.625”
(66.7 mm), roll widths up to

4.125” (80 mm).

Roll Capacity

Label Media: Approx. 75’ (23 m),
creating 148 6” long labels.
Receipt Media: Approx. 173’ (52.6 m),
creating 346 6” long receipts.

Core Size: 0.75” Recommended (19
mm).

Power Management

Battery: Rechargeable 3 cell Lithium
Ion, (11.3 V, 2950 mAh, 33.2 Wh).

Endurance: Over 3,500 printed inches
per charge.

Power Option: 100-240 VAC wall
adapter, or 12-24 VDC in-vehicle
adapter. When plugged in, the printer
can be used while recharging the
battery or can be run without the battery
(print & charge adapter).

Physical Specifications

L x W x H: 6.1” x 5.7” x 2.7” (15.5 x 14.5
x 6.9 cm).
Weight: 24 ounces (.68 kg) with battery.

Environmental Specifications

Operating Temp: 0° to 113°F (-18° to
45°C).
Storage Temp: -4° to 140°F (-20° to
60°C).
Humidity: 10% to 90% RH (non­condensing).
Rated IP54 per IEC 529



Operator Controls and
Indicators

3 LED indicators for general fault,
power and battery status indication.
Buttons for power and paper feed.
Sensors for paper out, black mark
detection, and door open. “Gas gauge”
on battery door.

Memory Capacity

256 MB Flash, 512 MB DDR2.
Standard memory supports large and
graphic intensive print jobs.

Durability and Reliability

Survives multiple 6 foot drops to
concrete (each face) per IEC 68-2.
MTBF: 10,000 hours in normal use.

Regulatory Approvals

FCC Class B, CE mark, RoHS, UL
listed AC adapters, e-mark.

Warranty

2-year printer warranty on the entire
printer—case and print head included.
1-year warranty on the battery.

Options and Accessories

 AC Wall Adapter, 100 to 240 VAC

o Print and charge version
o Charge only version

 In-Vehicle Power Adapter, 12 to

24 VDC

 Shoulder Strap
 Data Cables; USB
 Spare Batteries in Multi-Packs
 Media in Case Quantities
 Popular Mounting Systems

o In-Vehicle Systems
o Cart Mounting Systems
o Fixed Mounting Systems



27 www.dascom.com

B. Appendix B – Supplies and Accessories

Part # ACCESSORIES

93181 AC Charge & Print Adapter - North America, 100-240VAC 50/60Hz
93180 AC Charging Adapter - North America, 100-240VAC 50/60Hz
xxxxx USB Cable, A to C, 6 Ft.
91868 Shoulder Carrying Strap
93176 DP-541 Battery Charger 1 bay
93177 DP-541 Battery Charger 2 bay
93194 Spacer for 3" paper DP-541

Part # SUPPLIES

93104 DP-541 Battery (3 cell Li-ION; 33WH)
93124 DP-541 Battery, 5-Pack
93106 DP-541 Battery, 20-Pack
91393 Thermal Printhead Cleaning Pen (12/box)

C. Appendix C – Media

Part # Grade Type Qty

xxxxx STANDARD Receipt Paper, 4.125" W (94 Linear feet per roll) 36 ROLLS
93110 STANDARD Receipt Paper, 3.125" W (94 Linear feet per roll) 36 ROLLS

xxxxx PREMIUM Premium Receipt Paper, 4.125" W (70 Linear ft per roll) 36 ROLLS
93111 PREMIUM Premium Receipt Paper, 3.125" W (70 Linear ft per roll) 36 ROLLS

D. Appendix D – Mounting Options

Part # PRECONFIGURED KITS

xxxxx DP-541Round Base Mount with Bracket
xxxxx DP-541Magnetic Base Mount with Bracket
xxxxx DP-541Suction Base Mount with Bracket
xxxxx DP-541U-Bolt Mount with Bracket
xxxxx DP-541Round Base Mount with Long Arm Bracket
xxxxx DP-541Mounting Pole with Bracket

Part # PRINTER ATTACHMENTS

xxxxx DP-541Direct Mount Plate *
xxxxx DP-541Printer Plate With Ball

*For direct mounting. Not compatible with connecting arms or bases.

Please contact your Dascom sales representative for price and availability.

28 www.dascom.com

Glossary of Terms

802.11 Wireless networking communication standards created by IEEE.
Ad-Hoc A Wi-Fi network consisting of only stations (no access point). Same as Peer-to-

Peer.
authentication The process a Wi-Fi station uses to identify itself to another station.
baud rate The rate at which characters are transmitted over a serial interface. This is also

often referred to as bits per second.
client Any node on a network that requests services from another node (server).
character pitch The horizontal spacing of characters. Measured in cpi.
cpi Characters per inch.
default Value or configuration assumed when the printer is powered on or reset.
DHCP Dynamic Host Configuration Protocol. A method used to centrally control the

assignment of IP addresses on a network.
dpi Dots per inch. Generally used to refer to graphics density or resolution.
font A group of characters of a given shape or style.
infrastructure A Wi-Fi network consisting of stations connecting to a wired network or other

stations via an access point.
interface The connection between the printer and the host computer.
IP Internet Protocol. A specification for packets, or datagrams, of data and an

addressing method to allow the exchange of data with another system. Must be

combined with another protocol such as TCP to create a complete connection

with the other system.
LAN Local Area Network.
LED Light emitting diode.
lpi Lines per inch.
margin An area along any edge of a form where data may not be printed.
Peer-to-Peer A network consisting of only stations (no access point or central server). Same

as Ad-Hoc.
reset Initialization of various operating features of the printer to the value or state

assumed when the printer is powered on.

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server Any node on a network that provides services to another node (client).
SSID Service Set Identifier. An identifier attached to packets on a Wi-Fi network that

identify the particular network the packets are intended for.
TCP Transmission Control Prot ocol. A specification that controls the connection

between systems on a network.
top of form The vertical position where the first line is printed on the paper. Also the position

the paper is advanced to when a form feed (FF) character is received from the

host or the Form Feed button is pressed on the printer's control panel.
USB Universal Serial Bus.
WAN Wide Area Network. Refers to connections that allow one LAN to communicate

with another LAN(s).
WEP Wired Equivalent Privacy. A security protocol for wireless LANs designed to

provide data security similar to a wired LAN.
Wi-Fi Refers to any of the IEEE 802.11 standards.
WLAN Wireless Local Area Network. A LAN made up of wireless nodes.

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Index

802.11, 30
Add Enterprise Network, 11
Add Personal Network, 11
Address Method, 10
Ad-Hoc, 30
Alert, 6
Android, 3, 20
Android Tablets & Smart

phones, 20
Apple, 3, 21
authentication, 30
Auto Off Timer, 15
AUTOIMAGE, 12
Available Networks, 11
Backup Distance Before

Printing, 14
battery, 3, 5, 7, 23, 24, 25,

26
Battery Care, 23
Battery Disposal, ii
Battery Installation, 5
baud rate, 30
Canadian Department of

Communications Radio

Interference Statement, i
character pitch, 30
Charge Battery, 5
Charging the Battery, 23
Cleaning, 23, 29
client, 30
Com Port, 19
Configuration, 7, 22, 30
Connectivity Parameters, 8
Contrast, 14
Control Panel, 6
CPCL, ii, 12
cpi, 30
Current Emulation, 12
Current Logo Mapping, 16
Current Printer Config, 10
default, 30
Default Font, 12
Default Text Line Spacing,

13
Device Config, 13
DHCP, 30
discover name, 19, 21
Discoverablity, 9
dpi, 30
driver, 19
Drivers, 19

ESCPOS, 12
Fault Description and

Resolution, 25
FCC Part 15 Class B, i
features, 31
Font Aliases, 15
Fonts, 15
form, 31
Front Paper Sensor

Threshold, 14
Gap Paper Sensor

Threshold, 14
GateWay, 10
General Error Conditions, 25
Graphics, 16
IMAGE, 12
Image Parameters, 12
infrastructure, 30
interface, 30
IP Address, 10
IP54, 3
IPL, 12
LAN, 30
LED, 30
Left Margin, 14
lpi, 30
Maintenance, 2, 23, 26
margin, 30
Mark Seeking, 14
Max Mark Search Distance,

14
Max Paper Speed, 13, 26
Maximum Battery Life, 23
Media, 2, 22, 27, 28, 29
Mounting Options, 29
Obtaining Service, 26
Paired Mode, 8
pairing code, 19
Paper Energy Values, 14
Paper Feed Button, 6
Paper Load, 4

passkey, 19, 21
PDF, 12
Peer-to-Peer, 30
PIN, 8, 9
POSTSCRIPT, 12
power, i, ii
Power Button, 6
Power On, 5
Quick Start Instructions, 4

Rear Paper Sensor

Threshold, 14
reset, 31
Role Policy, 9
Safety Information, 24
Self-Test, 6, 24
server, 31
Set Date, 11
Set index, 16
Set Width, 16
Specifications, 2, 3, 27, 28
SSID, 31
Stop Distance after Mark, 14
SubNetMask, 10
Supplies and Accessories, 2,

29
TCP, 31
Testing the Power Adapter

and Battery, 24
Troubleshooting, 2, 23, 24,

25
Units, 13
Upload Digital Certificate, 12
Upload File, 16
Upload Font File, 15
USB, 19, 31
USB port, 2, 19
WAN, 31
web page, 7
WEP, 31
Wi-Fi, ii, 2, 20, 30, 31
WI-FI Config, 8, 9
Wifi Port, 10
Windows, ii, 3, 18, 19, 20
WLAN, 31
ZPL, 12

DASCOM REPRESENTATIVES

GERMANY

DASCOM Europe GmbH
Heuweg3
D-89079Ulm
De

utschland
Tel.:[phone]
Fax:[phone]

www.dascom.com

SINGAPORE (ASIA PACIFIC)

DASCOM AP Pte Ltd
2 Jurong East Street 21
#05-42, IMM Building
Singapore 609601
Phone:[phone]
Fax:[phone]

www.dascom.com

FRANCE

DASCOM Europe GmbH
117

Avenue

VictorHugo

92100

Boulogne-Billancourt
France
Phone:[phone]

www.dascom.com

UNITED KINGDOM

DASCOM GB Ltd
Hart House, Priestley Road

,
Basingstoke,Hampshire
RG24 9 P U ,England
Phone:[phone]
Fax:[phone]

www.dascom.com

AMERICAS

DASCOM Americas Corporation
34 Lakeview Court
Verona, VA 24482
USA

Phone: +1

(877)

434 1377
Fax:[phone]

www.dascom.com

CHINA

JIANGMEN DASCOM COMPUTER
PERIPHERALS CO., LTD
No.399, Jinxing Road,
Jianghai District, Jiangmen,
P.R. China

www.dascom.com

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