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TD-2020A
TD-2125N
TD-2135N
TD-2125NWB
TD-2135NWB
Before using this printer, be sure to read this User's
Guide.
We suggest that you keep this manual in a handy
place for future reference.
Please visit us at support.brother.com, where you
can get product support and answers to frequently
asked questions (FAQs). Version 02
US ENG
USER’S GUIDE

i
Introduction
Thank you for purchasing the Brother TD-2020A/2125N/2135N/2125NWB/2135NWB.
The TD-2020A/2125N/2135N/2125NWB/2135NWB (hereafter referred to as “the printer”) is
a powered desktop thermal printer. Be sure to read the User’s Guide, Product Safety Guide,
Quick Reference Guide, Software User’s Guide, and Network User’s Guide (TD-2125N/2135N/
2125NWB/2135NWB only) before using the printer. We suggest that you keep these documents
in a secure place for future reference.
The following documents are available from our support site (support.brother.com):
User's Guide
Software User's Guide
Network User's Guide (TD-2125N/2135N/2125NWB/2135NWB only)
Symbols Used in This Document
The following symbols are used throughout this document.
CAUTION
This symbol indicates instructions that may result in injuries or damage if they are ignored or
incorrectly followed.
NOTE
This symbol indicates notes that provide information or directions that can help you better
understand and use the product more efficiently.
IMPORTANT NOTICE
For Windows 11 Users:
This printer supports Microsoft Windows 11.
All features in Windows 8.1 and Windows 10 are available in the Windows 11 environment and
work in a similar way.
This symbol indicates information or directions that should be followed.
Ignoring them may result in damage or failed operations.

ii
Trademarks
Apple, iPad, iPhone, and Safari are trademarks of Apple Inc., registered in the United States and
other countries.
Wi-Fi® and Wi-Fi Alliance® are registered trademarks of Wi-Fi Alliance®.
WPA™, WPA2™, WPA3™, and Wi-Fi Protected Setup™ are trademarks of Wi-Fi Alliance®.
Android and Google Chrome are trademarks of Google LLC.
The Bluetooth® word mark is a registered trademark owned by Bluetooth SIG, Inc. and any use
of such marks by Brother Industries, Ltd. is under license. Other trademarks and trade names are
those of their respective owners.
Any trade names and product names of companies appearing on Brother products, related
documents and any other materials are all trademarks or registered trademarks of those
respective companies.

iii
Table of Contents
1 Getting Started 1
General Description ...............................................................................................1
Power Supply.........................................................................................................3
Connecting to an AC Power Outlet..................................................................3
Installing the Printer Driver and Software ..............................................................3
Registering Paper Size Information With the Printer .............................................4
2 Printing 5
Operation Panel.....................................................................................................5
LED Indicators .................................................................................................5
Button Functions..............................................................................................6
Inserting the Media Roll .........................................................................................7
Checking the Sensor Position .........................................................................9
Cutting Roll Paper .........................................................................................10
Printing the Printer Setup Information..................................................................11
Connecting the Computer and Printer .................................................................13
USB Cable Connection..................................................................................13
Wired LAN Connection (TD-2125N/TD-2135N/TD-2125NWB/
TD-2135NWB only) ...................................................................................13
Wireless LAN Connection..............................................................................14
Without Using a Wi-Fi Router/Access Point (Wireless Direct).......................15
Using Infrastructure Mode and Wireless Direct Simultaneously....................16
Using Wi-Fi Protected Setup™ (WPS) ..........................................................16
Connect the Printer to a Computer Using a Bluetooth Connection ...............17
Printing.................................................................................................................18
Making Prints Lighter or Darker.....................................................................18
Printer Driver Options ..........................................................................................19
3 Printer Setting Tool 20
About the Printer Setting Tool..............................................................................20
Before Using the Printer Setting Tool ............................................................20
Using the Printer Setting Tool..............................................................................20
Communication Settings (TD-2125N/TD-2135N/TD-2125NWB/
TD-2135NWB only)...........................................................................................22
Settings Dialog Box .......................................................................................22
Menu Bar .......................................................................................................23
General Tab...................................................................................................24
Wired LAN/Wireless LAN Tabs (TD-2125NWB/TD-2135NWB only).............24
Wireless Direct Tab (TD-2125NWB/TD-2135NWB only)...............................26
Bluetooth Tab (TD-2125NWB/TD-2135NWB only) .......................................27
Applying Setting Changes to Multiple Printers ..............................................27
Device Settings....................................................................................................28
Settings Tabs.................................................................................................29
Menu Bar .......................................................................................................34

iv
P-touch Template Settings ..................................................................................35
P-touch Template ..........................................................................................35
P-touch Template Settings Dialog Box..........................................................36
Paper Size Setup.................................................................................................38
Paper Size Setup Dialog Box ........................................................................38
Distributing Paper Formats............................................................................41
4 Other Functions 42
Mass Storage Functions......................................................................................42
Mass Storage Feature...................................................................................42
Using the Mass Storage Feature...................................................................42
Change Printer Settings Using Web Based Management...................................43
Software Development Kit ...................................................................................44
5 Maintaining the Printer 45
Print Head Maintenance ......................................................................................45
Platen Roller Maintenance...................................................................................46
Media Exit Maintenance ......................................................................................46
Label Peeler (Optional) Maintenance (TD-2125N/TD-2135N/
TD-2125NWB/TD-2135NWB only) ...................................................................47
6 LED Indicators 48
LED Indicators .....................................................................................................48
7 Troubleshooting 50
Overview..............................................................................................................50
Troubleshooting Tips .....................................................................................50
Error Messages for Touchpanel Display (Optional)
(TD-2125N/TD-2135N/TD-2125NWB/TD-2135NWB only)........................58
8 Specifications 60
Product Specifications .........................................................................................60
Product Dimension ..............................................................................................62
9 Using the RJ25 to DB9M Serial Adapter
(Optional: PA-SCA-001) 64
Connecting the Computer and Printer With the RJ25 to DB9M Serial Adapter
....64
Product Specifications .........................................................................................64
10 Using the Touchpanel Display (Optional: PA-TDU-001)
(TD-2125N/TD-2135N/TD-2125NWB/TD-2135NWB only) 65
General Description.............................................................................................65
LCD .....................................................................................................................65
Main Screen ..................................................................................................65

v
Touchpanel ..........................................................................................................66
Information About Replacing the Touchpanel ...............................................67
Printing With the Touchpanel Display..................................................................68
Touchpanel Display Settings ...............................................................................69
Specifying Settings From the Touchpanel.....................................................69
Creating a Label Layout.......................................................................................73
Creating a Template ......................................................................................73
Linking a Database to a Template.................................................................75
Transferring the Label Layout to the Printer ........................................................77
Selecting the Touchpanel ..............................................................................78
Selecting the Data Assigned to Keys on the One-touchpanel .......................79
Creating a One-touchpanel ...........................................................................80
Printing the Label.................................................................................................80
Printing Using the Basic Control Panel..........................................................80
Printing Using the One-touchpanel................................................................82
Printing a Different Date/Time Than the Printer's Internal Clock ...................83
Printing Using a Barcode Reader ..................................................................84
Label Layouts on the Printer (Checking, Deleting and Log) ................................84
Replacing the Time/Date Battery.........................................................................85
Frequently Asked Questions................................................................................86
Product Specifications .........................................................................................87
11 Using the Label Peeler (Optional: PA-LP-001)
(TD-2125N/TD-2135N/TD-2125NWB/TD-2135NWB only) 88
Inserting the Media Roll .......................................................................................88
Printer Driver Settings ...................................................................................91
After Printing..................................................................................................92
Product Specifications .........................................................................................92

Chapter 1
2
Back - TD-2020A 1
Back - TD-2125N/TD-2135N 1
Back - TD-2125NWB/TD-2135NWB 1
1 External media feed slot
2 Serial port
3 Power connector
4 Mini-USB port
5 USB host port (TD-2125N/2135N/2125NWB/
2135NWB only)
6 Ethernet network port (TD-2125N/2135N/
2125NWB/2135NWB only)
7 Wi-Fi® indicator (TD-2125NWB/2135NWB
only)
8 Bluetooth® indicator (TD-2125NWB/
2135NWB only)
Optional Accessory: 1
RJ25 to DB9M serial adapter
(PA-SCA-001)
Optional Accessories:
(TD-2125N/2135N/2125NWB/
2135NWB only) 1
Touchpanel display (PA-TDU-001)
Label peeler (PA-LP-001)
1
3
2
4
2
3
4
5
6
1
2
7
3
4
8
5
6
1

Getting Started
3
1
Power Supply 1
This printer operates using the AC Adapter
(included).
The AC Adapter supplies power directly to
the printer, making it suitable for high-volume
printing.
Connecting to an AC Power
Outlet 1
aConnect the AC Adapter to the printer.
bConnect the AC power cord to the
AC Adapter.
cConnect the AC power cord to a nearby
AC power outlet (100 - 240 V,
50/60 Hz).
dPress the (Power) button to turn the
printer on. The POWER indicator lights
in green, and the printer is in standby.
1 AC Adapter
2 AC power cord
Installing the Printer
Driver and Software 1
Install the printer driver and software using
any of the following methods:
USB cable connection
Wired LAN connection (TD-2125N/
2135N/2125NWB/2135NWB only)
Wireless LAN connection
(TD-2125NWB/2135NWB only)
Bluetooth Connection
(TD-2125NWB/2135NWB only)
Go to support.brother.com to download
printer drivers, software, and manuals for
your printer, and to view FAQs.
Double-click the downloaded file and follow
the on-screen instructions to proceed with the
installation.
Be sure to unwrap all cords before
connecting them.
1
2

Chapter 1
4
Registering Paper Size
Information With the
Printer 1
The “Printer Setting Tool” allows you to
register the paper size information for
printing.
aMake sure the printer driver is installed
and you can print.
bConnect the computer to the printer with
a USB cable. This step is necessary
only initially to download the settings to
the printer.
cGo to the Printer Setting Tool and
select the [Paper Size Setup] option.
Specify the size information (label width
and length, label spacing, etc.) for the
media to be used, and then add the
paper format.
Settings can also be adjusted for
[Printing Reference Point
Adjustment] and [Energy Rank], and
[Import] or [Export] can be clicked to
perform the corresponding operations
with the added paper size information
list.
dTo register the paper size information
with the printer, in the Paper Size Setup
dialog box, click the Option button, and
then select Register Paper Size With
Printer. For more information, see
Paper Size Setup on page 38.

5
2
2
Operation Panel 2
The operation panel consists of the following buttons and indicators:
1 POWER indicator
2 (Power) button
3 (Feed) button
4 (Print) button
5 STATUS indicator
6 Wi-Fi indicator
7 Bluetooth indicator
LED Indicators 2
The LED indicators light and blink to indicate the printer’s status. Each LED indicator may light or
blink in green, red, blue, or orange. For more information, see LED Indicators on page 48.
Printing 2
1
2 3 4
5
6 7

Chapter 2
6
Button Functions 2
(Power) Operation
Turn the printer on While the printer is turned off, press the (Power) button. The
POWER indicator turns on.
Turn the printer off While the printer is turned on, press and hold the (Power) button
until the POWER indicator turns off. (If the [Auto Power Off] function
is enabled in [Device settings] of the “Printer Setting Tool > Device
settings > Auto Power Off”, the printer turns off automatically after
the specified period of inactivity.)
(Feed) Operation
Feed the paper When the paper type is set to [Die-cut Label] or [Media With Marks]:
Press the (Feed) button to automatically feed the paper to the print
position.
When the paper type is set to [Continuous Length Tape]:
Press the (Feed) button to feed the paper about 1" (25.4 mm).
The default setting is [Continuous Length Tape].
Use [Paper Size Setup] in the “Printer Setting Tool” to register the
paper size information with the printer. For more information, see
Registering Paper Size Information With the Printer on page 4.
(TD-2125NWB/2135NWB only)
Switch the Wi-Fi, Bluetooth, or
both connections
To enable or disable the wireless LAN, Bluetooth, or both connection
enable/disable, press and hold the (Feed) button for five seconds.
(TD-2125NWB/2135NWB only)
Setting up Wi-Fi Protected Setup
(WPS)
To enable Wi-Fi Protected Setup (WPS), press and hold the (Feed)
button for ten seconds.
(Print) Operation
Perform the specified operation With the printer idle, press this button to perform the operation
specified in [Device settings] of the “Printer Setting Tool”. For more
information, see Print Key Function on page 30.
Print the printer setup information Make sure that a roll is installed, and then press and hold the (Print)
button for at least one second to begin printing the printer setup
information. For more information, see Printing the Printer Setup
Information on page 11.
Execute a file stored in the mass
storage area
With the printer in mass storage mode, press the (Print) button to
execute a command file stored in the mass storage area.
Reset the incrementing field Press and hold the (Print) button for at least five seconds, until the
POWER and STATUS indicators blink three times in orange.
Multiple buttons Operation
Start the printer in mass storage
mode
While pressing the (Print) button, press and hold the (Power)
button to start the printer in mass storage mode. For more information,
see Mass Storage Functions on page 42.

Printing
7
2
Inserting the Media Roll2
aPress and hold the (Power) button to
turn the printer off.
Press the cover release lever (1) on
either side and lift to open the Media Roll
compartment top cover.
bOpen the media guides by lifting the
media guide adjustment lever (1) and
pulling the media guides outwards.
NOTE
The media guides are shipped fully open
from the factory.
cInsert the Media Roll into the Media Roll
compartment, and then close the Media
Roll compartment top cover.
For Media Roll
1Insert the Media Roll so that the
labels feed with the side to be
printed on facing up (1), as
shown.
We recommend using genuine Brother
Media Roll. Genuine Brother fanfold
media is not available at this time.
1
1
Use Media Rolls with an outer roll
dimension of 5" (127 mm) or less.
Use Media Rolls designed for TD
series printers. Regardless of the
size, some Media Rolls may not be
compatible.
Insert the Media Roll facing the
correct direction. If the Media Roll is
not inserted correctly, the printer will
not print on the correct side of the
paper or label.
When using media with the labels
rolled up on the inside, insert the roll
in the opposite direction of that
shown in sub-step 1 of step c so
that the print side of the labels will
face up.
1

Chapter 2
8
2While lifting the media guide
adjustment lever (1), push in
both media guides (2) to fit the
width of the paper.
3Feed the end of the Media Roll
under the media tip guides (1).
4Position the end of the paper
centered over the platen roller
and slightly out of the media
exit.
5Close the Media Roll
compartment top cover by
pressing it in the center.
Press down until it locks into
place.
For fanfold paper
1Insert the fanfold paper in the
direction shown.
1 Print side
1
2
1
1

Printing
9
2
2Feed the end of the fanfold
paper under the media tip
guides (1).
3Position the end of the paper
centered over the platen roller
and slightly out of the media
exit.
4Close the Media Roll
compartment top cover by
pressing it in the center.
Press down until it locks into
place.
dPress the (Power) button to turn the
printer on.
NOTE
If the paper size information for the die-cut
labels being used has been registered
with the printer, pressing the (Feed)
button will position the label at the correct
starting position. For more information,
see Registering Paper Size Information
With the Printer on page 4.
Checking the Sensor Position2
Check the sensor position for the type of
paper being used.
With die-cut labels that have no black
mark, the transmissive/gap sensor
detects the beginning of the label and
feeds the label to the correct position.
With receipt paper that has no black mark,
the reflective/black mark sensor detects if
paper has run out.
With media that has a black mark, the
reflective/black mark sensor detects the
mark and feeds the media to the correct
position.
1
With no black mark
Die-cut labels
Align on the sensor with on the printer.
(See Figure 1.)
Receipt paper
Width of 0.985"
(25 mm) or more
Align on the sensor with
on the printer. (See Figure 1.)
Width less than
0.985" (25 mm)
Align on the sensor with
on the printer. (See Figure 2.)
With a black mark
Align the black mark on the paper with the
centerline of the reflective/black mark sensor.
(See Figure 3.)
Make sure that there is at least 0.16" (4 mm) of
the black mark on the left and right of the
centerline for the reflective/black mark sensor.

Printing
11
2
Printing the Printer Setup Information 2
Press the (Print) button to print a report that lists the following printer settings:
Program version
Printer usage history
Missing dot test pattern
List of transferred data
Communication settings
NOTE
• You can use [Device settings] of the “Printer Setting Tool” to set, in advance, which items
will be printed. For more information, see Printer Information Report on page 30.
• The node name will also appear in the communication settings. The default node name is
“BRWxxxxxxxxxxxx”. (“xxxxxxxxxxxx” is based on your printer’s MAC address/Ethernet
address.)
aMake sure that a roll of 2.25" (57 mm) receipt paper has been loaded, and the Media Roll
compartment top cover is closed.
bTurn on the printer.
cHold down (for at least 1 second) the (Print) button until the POWER indicator starts
blinking in green and the printer setup information is printed.
NOTE
• For printing the printer setup information, we recommend using 2.25" (57 mm) receipt paper.
The length required for printing differs depending on the information to be printed.
• The printer setup information can also be printed from [Device settings] of the “Printer
Setting Tool”. For more information, see Print Information Report on page 34.

Printing
19
2
Printer Driver Options 2
You can configure various settings in the
printer driver’s dialog box, such as paper
size, number of copies, print quality, etc.
NOTE
You can also use the “Printer Setting
Tool” to configure more advanced
settings.
For more information, see Printer Setting
Tool on page 20.

Printer Setting Tool
37
3
7 Command Prefix Character
Change the prefix character code. Set a single
character code.
The prefix character is a code to identify
commands used in P-touch Template mode.
8 Non-Printed Character
The characters specified here are not printed
when data is received. Specify 1 to 20
characters.
9 Available Return Code
The line feed code is used when feeding data
to indicate that the following data should be
moved to the next line in a text object. One of
the following four line feed codes can be
selected, or 1 to 20 characters can be specified
as the line feed code.
Available settings: [^CR], [ ], [ ], [\0D\0A \0A \0D]
10 Replace FNC1
Select whether or not GS codes, which are
included in barcode protocols such as GS1-
128 (UCC/EAN-128), are replaced with FNC1
codes.
If this check box is selected, a received GS
code is replaced with the FNC1 code. If this
check box is cleared, a received GS code is
outputted as is.
11 Number of Copies
Set the number of copies. A number between 1
and 99 can be specified.
12 Give priority to print quality
Select the print quality setting. If this check box
is selected, priority is given to the print quality.
If this check box is cleared, priority is given to
the print speed.
13 Inverted 180 Degrees
If this check box is selected, the data will be
printed after it has been rotated 180 degrees.
14 Communication Settings
Sets the following parameters for serial
communication:
Baud Rate, Bit Length, Parity and Busy
Control.
15 Set
After the [Set] button (in the main dialog box or
the Communications Settings dialog box) is
clicked, the settings are saved as an .ini file
when the dialog box is closed.
To save the specified settings in a command
file, select [Save in Command File] from the
drop-down menu. The saved command file can
be used with the mass storage feature to apply
the settings to a printer. (See Mass Storage
Functions on page 42)
16 Cancel
Cancels the settings and closes the dialog box.
The settings will remain unchanged.
17 Default
Click this button to return the settings
(including those in the [Communication
Settings] dialog box) to their factory defaults.

Chapter 3
40
Advanced Printing Adjustments
Dialog Box 3
1 Printing Reference Point Adjustment
Adjust the position of the reference point (point
of origin for printing). This corrects printing
misalignments resulting from differences in
printer models or from the fixed margins of
some applications.
2 Tear Adjust
Adjust the tear bar tear off position for paper
media.
Available settings: -0.39" to 0.39" (-10.0 mm to
10.0 mm)
3 Energy Rank
Select a setting when it is necessary to adjust
the amount of heat (energy) from the print
head, for example, with special paper.
NOTE
•Advanced Printing Adjustments
When using “Standard Receipt Paper”*, set
[Energy Rank] to [6].
* Available paper types vary by country.
• There may be contrast variations in the print
result due to the operating environment and
media used. Change the setting if necessary.
4 Media Sensor (Transmissive/Gap)
Adjust the precision with which the
transmissive/gap sensor detects the gaps
(spacing) for die-cut labels and the amount of
light emitted by the sensor.
Settings can be specified when [Paper Types]
is set to [Die-cut Label].
NOTE
Since the settings for [Media Sensor
(Transmissive/Gap)] (page 31) in the [Device
settings] dialog box will have an effect, specify
appropriate values.
Example of the settings:
5 Media Sensor (Reflective/Bar)
Adjust the precision with which the reflective/
black mark sensor detects black marks and the
amount of light emitted by the sensor.
Settings can be specified when [Paper Types]
is set to [Media With Marks].
NOTE
Since the settings for [Media Sensor
(Reflective/Bar)] (page 31) in the [Device
settings] dialog box will have an effect, specify
appropriate values.
Example of the settings:
6 OK
Saves the settings and returns to the [New]
dialog box.
7 Cancel
Cancels the settings and closes the dialog box.
The settings will remain unchanged.
3
2
4
76
1
5
Setting
EX1
Setting
EX2
Device settings 2 -2
Paper Size Setup 2 2
Actual effect 4 0
Setting
EX1
Setting
EX2
Device settings 2 -2
Paper Size Setup 2 2
Actual effect 4 0

Printer Setting Tool
41
3
Distributing Paper Formats 3
The paper formats exported from the
[Currently Registered Paper Sizes] list can
be distributed to other computers.
Distributing Paper Formats 3
If the printer driver has been installed on the
recipient’s computer, the paper formats need
to be distributed.
aAt the sender’s computer, specify the
paper format settings, and then click
[Export]. (For more information, see
Paper Size Setup on page 38.)
The following files are created.
TD-2020A:
bst202ed.txt, bst202ed.ptd, pdt3335.bin
TD-2125N:
bst212ned.txt, bst212ned.ptd,
pdt4535.bin
TD-2135N:
bst213ned.txt, bst213ned.ptd,
pdt4735.bin
TD-2125NWB:
bst212nwbed.txt, bst212nwbed.ptd,
pdt4635.bin
TD-2135NWB:
bst213nwbed.txt, bst213nwbed.ptd,
pdt4835.bin
bSave bst202ed.txt, bst212ned.txt,
bst213ned.txt, bst212nwbed.txt or
bst213nwbed.txt at any location on the
recipient’s computer.
cAt the recipient’s computer, click
[Import].
The paper formats are replaced with the
imported ones.

42
4
Mass Storage
Functions 4
Mass Storage Feature 4
The mass storage feature allows you to
execute commands by sending data from a
computer or other device to the printer via
USB. Files that have been copied to the
printer’s mass storage area are processed
when you press the (Print) button.
This feature is useful in the following
situations.
When you want templates (.blf format) and
settings stored in a command file (.bin
format) and distributed by the
administrator to be applied to a printer
without using a customized tool
When you want to execute commands
without installing the printer driver
When you want to print and transmit data
from a device that has an operating
system (including non-Windows operating
systems) with a USB host feature
Using the Mass Storage
Feature 4
aMake sure that the printer is turned off.
bSimultaneously press and hold the
(Print) button, press and the
(Power) button.
The printer starts up in mass storage
mode, and the POWER indicator lights
in orange.
cConnect the computer or device to the
printer with a USB cable.
The printer’s mass storage area is
displayed on the screen of the computer
or device.
NOTE
If the mass storage area is not displayed
automatically, refer to the instructions for
the operating system of the computer or
device for information about displaying the
mass storage area.
dDrag and drop the file that you want to
copy to the mass storage area.
ePress the (Print) button.
The command file is executed.
While the file is being executed, the
POWER indicator lights in orange and
the STATUS indicator blinks in green.
fAfter the file has been executed, the
STATUS indicator turns off.
gTo turn off mass storage mode, turn the
printer off.
The printer will start up in its normal
operating mode.
Other Functions 4

Chapter 4
44
NOTE
If you are using a Domain Name System
or enable a NetBIOS name, you can type
another name, such as “SharedPrinter”
instead of the IP address.
For example:
https://SharedPrinter
If you enable a NetBIOS name, you can
also use the node name.
For example:
https://brnxxxxxxxxxxxx
cIf required, type the password in the
Login Login field, and then click .
dChange the printer settings as needed.
Every time you access Web Based
Management, type the password in the Login
field, and then click Login.
After configuring the settings, click Logout.
Software Development
Kit 4
A Software Development Kit (SDK) is
available. Visit the Brother Developer Center
(https://support.brother.com/g/s/es/dev/en/
index.html?navi=offall).
You can also download the b-PAC SDK and
SDKs for mobile devices (Windows Mobile,
Android, iPhone, and iPad). Note that the
SDKs that you can downloaded are subject to
change without notice.

45
5
5
Maintenance of the printer may be carried out
as required. However, some environments
require that maintenance must be done more
frequently (for example, in dusty conditions).
If dirt or dust is not removed, the printed
labels may contain white streaks, or media
may become jammed.
Print Head
Maintenance 5
Wipe the print head (1) with a cotton swab
dipped in isopropyl alcohol.
Clean the print head once a day or every roll
replacement, whichever comes first.
CAUTION
Do not let your skin come into contact with
the print head, to prevent electrostatic
damage and corrosion.
Do not touch the print media surface.
Make sure your printer is in a well-
ventilated room. If condensation occurs,
turn the printer off and wait until the
condensation disappears.
Do not scratch or hit the print head surface.
Do not blow dust away with your breath.
Maintaining the Printer 5
1

48
6
LED Indicators 6
The indicators light and blink to indicate the printer’s status. The following symbols are used in this
section to show the different indicator colors and patterns.
For more information on error causes and solutions, see Troubleshooting on page 50.
LED Indicators 6
or or or Indicators are lit in the color shown
or or Indicators are blinking in the color shown
or or Indicators blink one to three times in the color
shown, then turn off
Indicator is lit or blinking in any color or pattern
Indicator is off
POWER STATUS Description
Printer turned on
Initializing
Media Roll Compartment Top Cover open
Receiving data
Transferring/importing data
Printer cooling off
(three times) (three times) Resetting the incrementing field
(one time) (one time) Initialization complete
(Once every
1.8 seconds)
Error 1
See Troubleshooting on page 50.
(Twice every
1.8 seconds)
Error 2
See Troubleshooting on page 50.
System error
Printer in boot mode

LED Indicators
49
6
1Press and hold the (Feed) button for 10 seconds to enable a WPS connection.
2POWER indicator and STATUS indicator blink in green alternately.
3Press and hold the (Feed) button for five seconds to enable or disable Wi-Fi, Bluetooth,
or both.
(three times) (three times) Printer resetting
Printer in mass storage mode
(one time) Processing file in mass storage mode
Setting up WPS 1
Pairing with Bluetooth
POWER STATUS Wi-Fi Bluetooth Description
Ready to change modes 2
(Once every
three
seconds)
(Once every
three
seconds)
Wi-Fi on, not connected
Wi-Fi on, connected 3
(Once every
three
seconds)
(Once every
three
seconds)
Bluetooth on, not connected
Bluetooth on, connected 3
Wi-Fi on, connected/Bluetooth, on connected 3
POWER STATUS Description

Troubleshooting
51
7
The indicators show that the printer is
cooling down.
The print head or motor is too hot.
Print head:
If the print head becomes too hot, it may produce imaging
on the paper in areas not intended to be printed. This
condition is normal when printing a large number of
documents with a high print density. The printer will stop,
and resume printing after the print head has cooled down.
To avoid or delay the onset of this condition:
• Print using a lighter density setting and reduce the
number of black areas being printed (for example,
remove background shading and colors in graphs and
presentation documents).
• Make sure that the printer has adequate ventilation and
is not located in an enclosed space.
Motor:
If the printer is used continuously, the motor will become too
hot. In this case, the printer will stop and resume printing
after the motor has cooled down.
NOTE
This condition may occur more often when the printer is
used at a high altitude (above 3,048 m (10,000 feet)) due to
the lower air density available to cool the printer.
The indicators show that a system error
has occurred.
Turn the printer off, and then contact your reseller or Brother
Customer Service.
The printer does not print. Is a cable loose?
Check that the cables are connected securely.
Is the STATUS indicator is flashing?
An error occurred. Check the descriptions in the LED
Indicators on page 48, and then see If the STATUS
indicator blinks in red on page 56.
Problem Solution

Chapter 7
52
Media is not fed correctly. Is the print head or platen roller dirty?
Although the print head generally remains clean under
normal use, dust or dirt from the platen roller may stick to
the print head.
If this occurs, clean the print head or platen roller.
For more information, see Print Head Maintenance or
Platen Roller Maintenance on page 46.
Are the sensors in the correct position?
Check that the sensors are correctly positioned. For more
information, see Checking the Sensor Position on page 9.
Has the paper size information been registered with the
printer?
If the paper size information has not been registered with
the printer, the media will not be fed correctly.
For more information, see Registering Paper Size
Information With the Printer on page 4.
A data transmission error appears on
your computer.
Is the correct port selected?
Check that the correct port is selected.
Is the printer in cooling mode (the POWER indicator is
flashing in orange)?
Wait until the indicator stops flashing, and then try printing
again.
Is someone printing via the network?
If you try to print while other users are printing large
amounts of data, the printer will be unable to accept your
print job until ongoing printing is finished. In such a
situation, execute the print job again after the other jobs are
completed.
Problem Solution

Chapter 7
54
I want to reset the printer.
I want to delete the data transferred from
the computer.
To reset the printer, perform the following procedure:
1 Press and hold the (Power) button to turn the printer off.
2 Simultaneously, press and hold the (Feed) button and
the (Power) button until the POWER indicator lights in
orange and the STATUS indicator blinks in green.
3 While pressing the (Power) button, press the (Feed)
button six times.
4 Release the (Power) button.
All of the transferred data from the computer will be deleted,
and the printer will be reset to its factory settings.
I want to cancel the current print job. Make sure that this printer is turned on, and then press the
(Power) button.
I want to reset the incrementing field. Press and hold the (Print) button for at least five seconds,
until the POWER and STATUS indicators blink in orange three
times.
The media cannot be fed to the beginning
of a label.
If a feed error occurred, use the Custom Label Tool to apply
the correct paper settings to the printer.
Are the media sensors in the correct position?
Check that the sensors are correctly positioned. For more
information, see Checking the Sensor Position on page 9.
Data is being sent to the printer, but the
POWER indicator is not flashing green.
Make sure that the USB cable is connected securely. Try using
another USB cable.
(TD-2125NWB/2135NWB only)
For WLAN or Bluetooth connection, check that the appropriate
LED indicator is lit.
The labels are not peeling correctly
(when using the optional Label Peeler).
Make sure that the paper is correctly fed through the label
peeler.
Has the peeler option setting been specified in the printer
driver and with the “Printer Setting Tool”?
For more information, see Printer Driver Settings
on page 91 or Media Sensor (Peeler) (TD-2125N/2135N/
2125NWB/2135NWB only) on page 31.
The media is not ejected correctly (when
using the optional label peeler).
Has the label peeler sensor been exposed to direct sunlight?
If so, loaded media may not be detected correctly. Move the
printer in a location not exposed to direct sunlight.
Problem Solution

Troubleshooting
55
7
The printer does not operate correctly
(when using the optional touchpanel).
Does the touchpanel name (A or B) printed in the top right
corner of the touchpanel match the specified touchpanel
name, which appears in the bottom right corner of the LCD?
If they do not match, select [Set Panel] on the touchpanel,
and then select the correct setting. For more information,
see Specifying Settings From the Touchpanel on page 69.
Has the type of data assigned to one-touch keys been
correctly specified?
If the correct setting has not been specified, select [Keys
Function] from the touchpanel, and then correctly select
[Template] or [Database]. For more information, see
Selecting the Data Assigned to Keys on the
One-touchpanel on page 79.
No key on the touchpanel was pressed,
but data was unintentionally entered
(when using the optional touchpanel).
Since foreign material, such as dust, caught between the
touch panel, protective sheet, and touch panel holder may
cause a malfunction. Make sure that no foreign material is
attached.
Has the touch panel been folded? When a folded touch
panel is used, the fold may press on the touch panel holder.
Therefore, do not use a touch panel that has been folded.
The data that was entered is different
than the data for the touchpanel key that
was pressed (when using the optional
touch panel display).
Foreign matter, such as dust, between the touchpanel,
protective sheet, and touchpanel holder may cause a
malfunction. Make sure there is no foreign matter on or near
the touchpanel.
Has the touchpanel been folded? When a folded
touchpanel is used, the fold may press on the touchpanel
holder. Do not use a folded touchpanel.
Problem Solution

Chapter 7
56
If the STATUS indicator blinks in red 7
If the STATUS indicator is blinking red, complete the following steps to clear the error:
Press the (Power) button once.
If the error is still not cleared, turn the printer off, and then turn it on again.
If you still cannot clear the error, contact Brother Customer Service.
Problem Solution
The STATUS indicator is blinking. Check the error details in the LED Indicators section
on page 48, and then see below.
The indicators show that error 1 has
occurred.
Is the correct Media Roll installed?
Check that the correct media, type (die-cut label or
continuous length tape), and die-cut label size are installed.
Is the Media Roll installed correctly?
If not, remove the Media Roll, and then reinstall it.
For more information, see Inserting the Media Roll
on page 7.
If the label peeler (optional) is being used, see Inserting the
Media Roll on page 88.
Are the media guides not touching the sides of the Media
Roll?
Move the media guides against the sides of the Media Roll.
For more information, see Inserting the Media Roll
on page 7.
Is there enough of the roll remaining?
If not, install a new Media Roll.
Is the Media Roll compartment top cover open?
Check that the Media Roll compartment top cover is closed.
(TD-2125NWB/2135NWB only)
An access point could not be found, or two or more access
points have been found after approximately 2 minutes.

Troubleshooting
57
7
The indicators show that error 1 has
occurred. (continued)
If error 1 persists, check for the following:
- Make sure your media is longer than 39.37" (1 m).
- Make sure the file formats are compatible.
When sending a template as a BLF file, an error is indicated
if the model name in the file is different to the model name
of the printer receiving the file.
When trying to print a template, an error is displayed if the
specified template does not exist.
LED indicators shows an error if the search for a template
with a linked database fails.
LED indicators shows an error if the transferred, data
causes the capacity of the user storage area to be
exceeded.
If you get such errors, turn the printer off, and then turn it on
again.
If error 1 is not cleared, contact Brother Customer Service.
The indicators show that error 2 has
occurred.
Is the connected device supported by the USB port?
An overcurrent or unsupported device was detected by the
USB port. Turn the printer off, and then check the
connected device.
If a USB hub is connected, the printer will automatically turn
off after a certain length of time has passed.
Is the printer in mass storage mode?
An error is displayed if the file system becomes corrupted
or a file is copied while a mass storage file is being
processed. Turn the printer off.
Has the wireless LAN or Bluetooth connection been
interrupted? (TD-2125NWB/2135NWB only).
The wireless LAN or Bluetooth connection established
while the printer is on was interrupted. Turn the printer off,
and then turn it on again.
Problem Solution

60
8
Product Specifications 8
Specifications 8
Model Name TD-2020A TD-2125N TD-2135N TD-2125NWB TD-2135NWB
Printing
Printing Technology Direct Thermal
Printing Resolution 203 dpi 203 dpi 300 dpi 203 dpi 300 dpi
Print Speed
(Depends on the media
used.)
6 ips (152.4 mm/sec)
Maximum Print Width 2.2" (56 mm)
Maximum Print Length 39.3" (1,000 mm)
Minimum Print Length 0.23" (6 mm)
Printer Control
Commands
P-touch Template 2.0, ZPLII compatible, Raster, ESC/P, CPCL compatible
AC Power Supply AC Adapter (100 - 240 V 50/60 Hz)
Size
Weight 2.9 lb
(1.32 kg)
3.0 lb (1.34 kg)
Dimensions (W × D H) 4.3" × × 8.4" × 6.7" (110 mm × 215 mm × 172 mm)
Interface
USB USB Ver.2.0 (Full Speed) (mini-B, Peripheral)
Serial Original serial cable (Option: PA-SCA-001)
Wired LAN Not supported 10/100BASE-TX
USB Host Port Not supported Supported
Bluetooth Not supported Bluetooth Ver.5.2
(Classic + LE)
SPP, OPP, HCRP (Bluetooth
Classic), GATT (Bluetooth
Low Energy)
Supported protocol: iAP
WLAN Not supported Wireless LAN (2.4 GHz)
IEEE 802.11 b/g/n
(Infrastructure Mode)
IEEE 802.11 g/n (Wireless
Direct Mode)
Wireless LAN (5 GHz)
IEEE 802.11 a/n
(Infrastructure Mode)
*Ad-hoc is unsupported

Specifications
61
8
Operating Environment
Windows Operating
System
Windows 8.1 /
10 / 11
Win 8.1, 10, 11, Server 2012, 2012 R2, 2016, 2019, 2022
Operating Temperature 41°F to 104°F (5°C to 40°C)
Operating Humidity 20% to 80% (No condensation, Maximum wet bulb temperature: 80.6°F (27°C))
Storage Temperature -4°F to 140°F (-20°C to 60°C)
Storage Humidity 20% to 80% (No condensation, Maximum wet bulb temperature: 113°F (45°C))
Media Specifications
Media Type Receipt (Non-coated & Coated)
Die cut label
Tag
Wristband
Thickness
(The media material
may affect print quality.)
Receipt: 0.0023" to 0.0035" (0.058 mm to 0.090 mm)
Label: 0.003" to 0.007" (0.080 mm to 0.170 mm)
Tag: 0.0035" to 0.0053" (0.090 mm to 0.135 mm)
Wristband: 0.011" (0.279 mm)
Outer Diameter 5" (127 mm)
Core Diameter 1" (25.4 mm)
Max. Media Width 2.48" (63 mm)
Model Name TD-2020A TD-2125N TD-2135N TD-2125NWB TD-2135NWB
Produktspecifikationer
Varumärke: | Brother |
Kategori: | Skrivare |
Modell: | TD-2125N |
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