SEWOO SLK-T12EB User manual

All specications are subject to change without notice
T12EB ENG Rev. 07/2023
Aroot Co., Ltd.
28-6, Gajangsaneopdong-ro, Osan-si, Gyeonggi- do, 18103, Republic of Korea
TEL : [phone] / FAX : [phone]
http://www.miniprinter.com
MODEL : SLK-T12EB
Receipt Printer User’s Manual

This device co mplies 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.
Vic Barczyk
19700 S Vermont Ave Ste 200 Torrance, CA 90502 | USA
[e-mail]
Victor Almazan
Paseo de la Reforma No. 265 Piso 2.Ocina SBC. Col.
Cuauhtémoc, C.P. 06500 Ciudad de Mexico | Mexico
[e-mail]
Disposal of Old Electrical&Electronic Equipment(Applicable in the European Union and other
European countries with separate collection systems)
This symbol on the product or on its packaging indicates that this product shall not be treated as
household waste. Instead it shall be handed over to the applicable collection point for the recycling of
electrical and electronics equipment. For more detailed information about recycling of this product,
please contact your local city oce, your household waste disposal service or the shop where you
purchased the product.
1. Parts Identications 3
2. Setting up the printer 4
2-1. Unpacking 4
2-2. Connecting the cables 5
2-2-1. Interface Connector 6
2-2-2. Cash Drawer Connector 7
2-3. Loading the roll paper 8
2-4. Adjustment of paper width 11
3. Control panel and other functions 12
3-1. Control panel 12
3-2. Error Indicating 12
4. Self Test 13
5. ASCII Print 14
6. ECO Mode 14
6-1. Font 14
6-2. Paper Reduce 15
6-3. Density 15
7. Printer Setting 16
7-1. Baudrate 16
7-2. Cutter 16
7-3. Error Beep 16
7-4. Melody 17
Table of Contents

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2
1. Parts Identications
CONTROL PANEL
Features LED indicators
to indicate printer
status and switches to
operate the printer.
Used to turn on/o
power to the printer.
POWER SWITCH
Open this cover to load or
replace a paper.
PRINTER COVER
Push down this button to
open the printer cover.
COVER OPEN PUSH BUTTON
8. Hexadecimal Dump 18
9. Printer Cleaning 19
10. Linerless Printer 20
10-1. Linerless Printer Cleaning 20
10-2. Recommended Paper 20
11. Specications 21
12. Command List 23
13. Utilities 25
14. S/W 26

5
4
2. Setting Up the Printer
2-1. Unpacking
Your printer box should include these items. If any items are damaged or
missing, please contact your dealer for assistance.
The Printer User’s Manual Roll Paper
Adaptor(Option) Interface Cable(optional)
Cleaning pen(Optional)
2-2. Connecting the Cables
You can connect up the cables required for printing to the printer.
They all connect to the connector panel on the back of the printer, which is shown
below :
For connection to
a host computer.
For connection to
a host computer.
Connects to peripheral units such
as cash drawers, etc.
Do not connect this to a telephone.
For connection of the
AC adapter.
Never unplug the AC
adapter while the
printer is on.
INTERFACE CONNECTOR
(ETHERNET)
For connection to a host
computer.
INTERFACE
CONNECTOR
(SERIAL)
INTERFACE
CONNECTOR(USB)
POWER
CONNECTOR
CASH DRAWER
CONNECTOR
Before connecting any of the cables, make sure that both the printer and the
computer are turned o.

7
6
2-2-1. Interface Connector
4 3
21
9 Pin Serial USB “B” Type
Status LED
123453678
Link END
Ethernet
9Pin Serial Interface
PIN SIGNAL I/O Description
2RXD Input Printer receive data line
3TXD Output Printer transmit data line
4, 7 DTR Output Data Terminal Ready
5GND -System Ground
6DSR Input Data Set Ready
1,8,9 NC - -
USB Interface
PIN SIGNAL I/O Description
1+5V -+5V
2DATA- -Printer transmit data line
3DATA+ -Printer transmit data line
4GND -System Ground
USB Interface
PIN SIGNAL I/O
1Data Out + Output Data +
2Data Out - Output Data -
3Data IN + Input Data +
4N.C -
5N.C -
6Data IN - Input Data -
7N.C -
8N.C -
This equipment is indoor use and all the communication wirings are limited to
inside of the building.
2-2-2. Cash Drawer Connector
The printer can operate two cash drawers with a 6 pin RJ-11 modular connector.
The driver is capable of supplying a maximum current of 1.0A for 510ms or less
when not printing.
61
PIN SIGNAL Description
1Signal GND -
2Drawer kick-out drive signal 1 Output
3Drawer open/close signal Input
4+24V -
5Drawer kick-out drive signal 2 Output
6Signal GND -

9
8
2-3. Loading the Roll Paper
NOTE
Be sure to use paper rolls that meet the specications. Do not use paper rolls that
have the paper glued to the core because the printer cannot detect the paper end
correctly.
Turn o power switch.
1 Make sure that the printer is not receiving data; Otherwise, data may be lost.
2 Open the paper roll cover by pushing down the cover open push button.
3 Remove the used paper roll core if there is one inside.
4 Insert new paper roll as shown.
5 Note the correct direction that the paper comes o the roll:
O X
6 Pull out a small amount of paper as shown. Then, close the cover.
7 Tear o the paper as shown.

11
10
2-4. Adjustment of paper width
1 Please adjust the Paper Guide to t to the paper width as the direction of arrow.
2 Tight the screw after adjusting the Paper Guide.
3 Pull the edge of paper once the paper roll is installed correctly and close the
Paper Cover.
CAUTION
When the paper is jammed with cutter, the top cover might be stuck.
In this case, repeat power on and o several times.
If the top cover is still stuck, please follow the steps to release the
papers from jamming.
1 Make sure the printer is turned o.
2 Take out cutter cover as shown.
STANDARD LINERLESS
3 Turn screw with drivers to a direction until paper is released from the cutter.
STANDARD LINERLESS

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12
3. Control panel and other functions
3-1. Control panel
You can control the basic paper feeding operations of the printer with the button
on the control panel. The indicator lights let you to monitor the printer’s status.
Control Panel
POWER
ERROR
PAPER
FEED
Button
The button can be disabled by the ESC c 5 command.
Press the FEED button once to advance paper one line. You can also hold down
the FEED button to feed paper continuously.
3-2. Error indicators
STATUS
PAPER ERROR POWER
REMARKS
RED RED GREEN
Power o OFF OFF OFF Normal power is not supplied to the printer
Power on OFF OFF ON Normal power is supplied to the printer
On line OFF OFF ON Normal error-free mode
Cover
open
OFF ON ON Close cover
Paper
end
OFF ON ON Insert new paper roll
Paper
near end
ON OFF ON Paper is low
4. Self Test
The self-test result indicated whether the printer is operating properly.
Also with this, user can check following options or status of the printer.
Control circuit
Printer mechanism
Printing quality
ROM version
Interface setting
This test is independent of any other equipment or software.
Running the self test
1 Make sure the printer is turned o and the printer cover is closed properly
before performing the self test.
2 Turn the printer on holding the FEED button, then the self-test will start.
The self-test prints the printer setting value and then prints the following,
and pauses. (Error LED On)
SELECT MODE BY BUTTON
1. ASCII PRINT
2. ECO MODE
3. PRINTER SETTING
4. HEXADUMP MODE
3 Press the FEED button consecutively (1~4)
1. ASCII PRINT
(press the FEED button once) Printing test page constructed with ACII code.
2. ECO MODE
(press the FEED button twice)
Set the ECO mode for saving paper and power.
(Default font type, Reduce paper margin, Density)
3. PRINTER SETTING
(press the FEED button triple time)
Set the printer option.
(Serial baudrate, Cutting mode, Error beep, Melody)
4. HEXADUMP MODE
(press the FEED button quad time)
Printing the HEX value received from the interface
※ Wait for 5~6 seconds if you want to exit. Printer performs a cutting when
exiting this mode
4 The printer is ready to receive data after nishing setting.

15
1414
5. ASCII Print
6. ECO Mode
ASCII PRINT is printing a test page constructed ASCII code. You can able to check the
printer works properly with this
The ASCII PRINT test automatically ends and cuts the paper after printing the following :
*** Completed ***
The printer is ready to receive data as soon as it completes the ASCII PRINT.
After entering the ECO MODE, the list which can select the ECO option will be printed.
Similar like Self Test, you can press the FEED button to select a ECO option.
Once the input performs properly, the printer shows a result and store.
ECO MODE
1. FONT SETTING
2. LINE SPACE SETTING
3. LINE FEED SETTING
4. BARCODE[1D] HEIGHT
5. DENSITY SETTING
6-1. Font
FONT SETTING menu can be change the Font mapping(FONT A / FONT B).
If you did not want other side font, you can disable that.

yFONT A : 12x24

yFONT B : 9x13
FONT SETTING
1. FONT A -> A / FONT B -> B
2. FONT A -> B / FONT B -> B
3. FONT A -> A / FONT B -> A
4. FONT A -> B / FONT B -> A
6-2. Paper Reduce
Reduce menu (Line space, Line feed, barcode[1D] height) was developed for
paper saving.

yLine space
“Line space” means the amount of feed when you intentionally generate newlines.

yLine feed
“Line feed” means the amount of feed when there is an automatic line break.

yBarcode Height
“Barcode Height” means the height of the barcode when creating a one-
dimensional barcode.
LINE SPACE SETTING
01 NORMAL
02 REDUCE 50%
03 REDUCE 75%
04 REDUCE 90%
LINE FEED SETTING
01 NORMAL
02 REDUCE 50%
03 REDUCE 75%
04 REDUCE 90%
1D BARCODE HEIGHT SETTING
01 NORMAL
02 REDUCE 50%
03 REDUCE 75%
04 REDUCE 90%
6-3. Density
Adjust the print density to save the power consumed by the printer.
SELECT DENSITY
01 NORMAL
02 LOW
03 DARK

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7. Printer Setting
Change the printer settings. The options below can also be changed via the
Memory Saver.
PRINTER SETTING
01 SELECT BAUDRATE
02 SELECT CUTTING MODE
03 SELECT ERROR BEEP OPTION
04 SELECT MELODY OPTION
7-1. Baudrate
After entering the BAUDRATE MODE, the list which can select the BPS will be printed.
Similar like Self Test, you can press the FEED button to select a BAUDRATE. Once the
input performs properly, the printer shows a result and store. The printer is ready to
receive data as soon as it completes the SELECT BAUDRATEMODE.
SELECT BAUDRATE
01 4800bps
02 9600bps
03 19200bps
04 38400bps
05 57600bps
06 115200bps
7-2. Cutter
Set cutter mode.
SELECT CUTTING MODE
01 PARTIAL CUT
02 FULL CUT
7-3. Error Beep
If the cover is open or there is no paper, the error beep function is activated.
This option allows you to enable / disable the error beep.
SELECT ERROR BEEP OPTION
01 BEEP ON
02 BEEP OFF
7-4. Melody
To DK Port (Cash), Melody box or external buzzer can be connected.
You can activate it from the Melody Setting menu, and the melody will operate after
the cutting operation.

yMelody Box : Melody is xed and volume can be adjusted.

yExternal Buzzer : 3 types of melody are output according to the Melody Type
setting and volume control is not included.
SELECT MELODY OPTION
01 MELODY SETTING
02 SELECT MELODY TYPE
MELODY SETTING
01 MELODY ON AFTER CUTTING
02 MELODY OFF
SELECT MELODY TYPE
01 MELODY-Ⅰ
02 MELODY-Ⅱ
03 MELODY-Ⅲ

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8. Hexadecimal Dump
This feature allows experienced users to see exactly what data is coming to the
printer. This can be useful in nding software problems.
When you go into the hex dump function, the printer prints all commands and
other data in hexadecimal format along with a guide section to help you nd
specic commands.
To use the hex dump feature, follow these steps
1 Please turn printer o.
2 Please turn printer on while press down “Feed” button.
3 Press the FEED button three times when the Self Test printed.
4 Now printer had entered into Hexa dump mode.
5 Run any software program that sends data to the printer. The printer prints
”Hexadecimal printing mode…” and then all the codes it receives in a
two-column format. The rst column contains the hecadecimal codes and the
second column gives the ASCII characters that correspond to the codes.
Hecadecimal Dump
1B 21 00 1B 26 02 40 40 .!..& . @ @
1B 25 01 1B 63 34 00 1B .%..c4 ..
41 42 43 44 45 46 47 48 ABCDEFGH
A period (.) is printed for each code that has no ASCII equivalent.
6 Turn o the printer.
7 Turn on the printer.
9. Printer Cleaning
If the interior of the printer is dusty, printing quality can be lowered.
In this case, follow the instructions below to clean the printer.
NOTE
1 Make sure to turn the printer power o prior to cleaning
2 Regarding print head cleaning, as the print head is very hot during printing,
turn o the printer power and wait approximately 10 minute before start.
3 When cleaning the print head, take care not to touch the heated part of the
print head. The print head subject to be damaged by static electricity.
4 Take care not to allow the print head to become scratched and /or damaged
in any way.
1 Use an applicator swab moistened with an alcohol solution to clean the print
head and remove any dusts.
2 Once the cleaning is completed, insert paper roll into the printer few minutes
later and close the printer cover.
Preventing Overheating
To prevent the motor from overheating, continuous operation of the printer should
be 1.5 m or less in print length. Set the pause time for 30 seconds or more than it.

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10-1. Linerless Printer Cleaning
Paper dust or impurities inside the printer may cause printing problems. Please
clean as below.
1 Open the printer cover and clean the paper PASS part.
2 Remove the paper if it is jammed.
3 Remove impurities from cutter blade with cleaning pen or alcohol.
4 Wipe the printer head and roller with cleaning pen.
5 Wipe the paper detection sensor with a cotton swab or cloth.
6 When using linerless paper, please perform cleaning before using 30 Rolls or
within a week.
NOTE
If the adhesive builds up due to poor cleaning, printing problems may occur.
10-2. Recommended Paper
MAX International Converters, Inc. MAXStick Products Ltd(USA)
WARNING
We are not responsible for any paper use issues other than
recommended paper, which may result in poor print quality or
damage to the product.
10. Linerless Printer 11. Specications
Printing Method Direct Thermal
Printing Speed Max. 220 mm/sec
Linerless - Max. 160mm/sec
Resolution 180 DPI / 203 DPI (Optional)
Dot Pitch 0.141mm x 0.141mm /
0.125mm x 0.125mm
Printing Width Max. 72mm / 80mm
Number of print columns Font A - 42 columns / Font B - 56 columns
Emulation ESC/POS Command compatible
Driver
Windows Driver(XP ~, Server2003 ~),Win-
dows CE & Mobile Driver(CE 4.2 ~, Mobile
5.0 ~),Linux Driver, Mac Driver, OPOS Driver,
JavaPOS Driver, iOS SDK, Android(6.0 ~) SDK,
Windows SDK, Windows CE SDK Linux SDK
Paper
Paper type Thermal recipt paper / Linerless (Optional)
Width 50 ~ 82.5 ± 0.5mm
Thickness 0.06 ~ 0.09mm
Roll Max
Diameter Max. 80mm
Roll Core 12.5mm ± 0.5mm
Sensor
Standard Paper End, Paper Low, Cover Open
Option Black Mark
Interface Standard USB(B type)+Ethernet + Serial(RS-232C)
Cash drawer 2 circuits(24V, 1A Max.)
Reliability
MCBF 60 million lines
TPH Life 160Km / Linerless - 100km

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Cutter
Type Guillotine
Life 1,800,000 cuts
Linerless - 1,000,000 cuts
Paper Thickness 0.06 ~ 0.09mm
Power
AC 100 ~ 240Vac 50/60 Hz
DC 24Vdc / 1.75A
Size (W x D x H) 152 × 204 × 150 mm
Weight 1.7kg
Temperature
Operation 0 ~ 45℃
Storage -20 ~ 60℃
Humidity
Operation 35 ~ 80%
Storage 10 ~ 90%
No. Command Function REMARKS
1 HT Horizontal tab
2 LF Print and line feed
3 CR Print and carriage return
4 FF Print and return to standard mode(in page mode)
5 CAN Cancel print data in page mode
6 DLE EOT Real-time status transmission
7 DLE ENQ Real-time request to printer
8 DLE DC4 Generate pulse at real-time
9 ESC FF Print data in page mode
10 ESC SP Set right-side character spacing
11 ESC ! Select print mode(s)
12 ESC $ Set absolute print position
13 ESC % Select/cancel user-defined character set
14 ESC & Define user-defined characters
15 ESC * Set bit-image mode
16 ESC - Turn underline mode on/off
17 ESC 2 Select default line spacing
18 ESC 3 Set line spacing
19 ESC = Select peripheral device
20 ESC ? Cancel user-defined characters
21 ESC @ Initialize printer
22 ESC D Set horizontal tab positions
23 ESC E Turn emphasized mode on/off
24 ESC G Turn double-strike mode on/off
25 ESC J Print and feed paper using minimum units
26 ESC L Select page mode
27 ESC M Select character font
28 ESC R Select an international character set
29 ESC S Select standard mode
30 ESC T Select print direction in page mode
31 ESC V Turn 90° clockwise rotation mode on/off
32 ESC W Set printing area in page mode
33 ESC ＼ Set relative print position
34 ESC a Select justification
35 ESC c 3 Select paper sensor(s) to output paper-end signals
36 ESC c 4 Select paper sensor(s) to stop printing
37 ESC c 5 Enable/disable panel buttons
38 ESC d Print and feed paper n lines
39 ESC p General pulse
12. Command List

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24
No. Command Function REMARKS
40 ESC t Select character code table
41 ESC { Turn upside-down printing mode on/off
42 FS p Print NV bit image
43 FS q Define NV bit image
44 GS ! Select character size
45 GS $ Set absolute vertical print position in page mode
46 GS * Define downloaded bit image
47 GS / Print downloaded bit image
48 GS B Turn white/black reverse printing mode on/off
49 GS H Select printing position of HRI characters
50 GS I Transmit printer ID
51 GS L Set left margin
52 GS P Set horizontal and vertical motion units
53 GS V Select cut mode and cut paper
54 GS W Set printing area width
55 GS ＼ Set relative vertical print position in page mode
56 GS a Enable/disable Automatic Status Back(ASB)
57 GS f Select font for HRI characters
58 GS h Set bar code height
59 GS k Print bar code
60 GS r Transmit status
61 GS v 0 Print raster bit image
62 GS w Set bar code width
< Add >
1 ESC i Full cut
2 ESC m Partial cut
3 FS ! Set print mode(s) for Kanji characters
4 FS & Select Kanji character mode
5 FS - Turn underline mode on/off for Kanji character
6 FS . Cancel Kanji character mode
7FS 2 c1 d1…dk Define user-defined Kanji characters
8 FS C Select Kanji character code system
9 FS S 1 2 Set Kanji character spacing
10 FS W Turn quadruple-size mode on/off for Kanji character
The following utilities and concerned manual can be found on the CD or
homepage.
No. Name Description
1Memory Saver
This is a utility that allows you to set printers by
interface.
Detailed settings such as Wi-Fi, Ethernet, and COM ports
can be congured.
2 NV Logo Upload
With NV Logo Upload running on Windows OS, you can
upload and remove the bmp le as Logo in the printer’s
ash memory, and print test is possible.
3 Download Tool
(F/W)
Printer F/W and Font Download are available, and
BT, Wi-Fi module F/W Download is supported as an
option.
4 Android Utility
(Sewoo M_Utility)
It is a utility app that prints text, barcodes, images,
etc. through Bluetooth and Wi-Fi communication,
and able to printer settings.
13. Utilities

27
26
We provides SDK, Driver, etc. as follows to respond to various S/W usage
environments.
You can download this S/W from the homepage.
No. Name Description
1Windows Driver
This is an install program used to print a POS printer in
Windows OS.
2 Linux Driver
This is the Cups Driver used to print a Thermal printer in
the Linux environment.
3 OPOS Driver
This is a driver that controls POS printers using the
OPOS standard.
It can be used after initial setting(POS Printer&Cash
Drawer) using the setting tool.
4 JavaPOS Driver The JavaPOS driver is an interface standard for POS
software written in Java.
5Mac Driver This is the Cups Driver used to print a Thermal printer
in the Mac OS environment.
6
Android Plugin
(Sewoo Print
Service Plugin)
This is a print service plug-in that allows you to
print documents, images, and web pages without
installing additional apps.
7Windows SDK
This is library for communication and data output
with Thermal printer in Windows OS.
Can be used through direct communication and
driver.
14. S/W
No. Name Description
8Android SDK This is library for communication and data output
with Thermal printers in Android OS.
9iOS SDK This is library for communication and data output
with Thermal printers in iOS.
10 Linux SDK This is library for communication and data output
with Thermal printers in Linux.