SEWOO LK-T41 User manual

All specifications are subject to change without notice
Receipt Printer User’s Manual
MODEL : LK-T41

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1. Parts Identifications 3
2. Setting up the printer 4
2.1 Unpacking 4
2.2 Connecting the cables 5
2.3 Loading the roll paper 8
2.4 Dip switch setting 10
3. Control panel and other functions 13
3.1 Control panel 13
3.2 Error Indicating 13
4. Self Test 14
5. Hexadecimal Dump 15
6. Specifications 16
6.1. General Specifications 16
6.2. Auto Cutter Specifications 18
6.3. Interface 18
6.4. Electrical Characteristics 18
6.5. Environmental Requirements 19
6.6. Reliability 19
6.7. Certification 19
7. Command List 20
Table of Contents

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PERIPHERAL
DRIVE CONNECTOR
INTERFA ORCE CONNECT
INTERFA OR(USB)CE CONNECT
POWER CONNECTOR
1. Parts Identifications
PRINTER COVER
Open this cover is load or
replace paper
CONTROL PANEL
Features LED indicators
to indicate printer status
and switches to operate
the printer.
COVER OPEN BUTTON
Pull down this button to
open the printer cover.
POWER SWITCH
Used to turn on/off power
to the printer.

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2-1. Unpacking
Your printer box should be included these items. If any items are damaged or missing, please contact
your dealer for assistance.
The Printer User's Manual Roll Paper
Interface Cable(optional) Adaptor(optional)
Interface Cable USB (optional)
2. Setting Up the Printer

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INTERFACE CONNECTOR(Serial)
PERIPHERAL DRIVE CONNECTOR POWER CONNECTOR
For connection to a host
computer
INTERFACE CONNECTOR(USB)
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.
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 :
Before connecting any of the cables, make sure that both the printer and the computer are turned off.

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2-2-1. Interface Connector
Serial Interface
PIN SIGNAL I/O DESCRIPTION
3 TXD Output Printer transmit data line RS-232C level
2 RXD Input Printer receive data line RS-232C level
4, 7 DTR Output Printer handshake to host line RS-232C level
6 DSR Input Data Send Ready
5 GND - System Ground
USB Interface
PIN SIGNAL I/O DESCRIPTION
1 +5V - +5V
2 DATA- - Printer transmit data line
3 DATA+ - Printer transmit data line
4 GND - System Ground
<RS-232>
<USB>

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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/24VDC for 510ms or less when not
printing.
PIN SIGNAL DESCRIPTION
1 Signal GND -
2 Drawer kick-out drive signal 1 Output
3 Drawer open/close signal Input
4 +24V -
5 Drawer kick-out drive signal 2 Output
6 Signal GND -
Caution : To avoid an overcurrent, the resistance of the drawer kick-out solenoid must be
24 Ω or more.

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2-3. Loading the Roll Paper
Notes: Be sure to use paper rolls that meet the specifications. Do not use paper rolls that have the
paper glued to the core because the printer cannot detect the paper end correctly.
2-3-1. Turn off 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 button.
3. Remove the used paper roll core if there is one inside.
4. Insert new paper roll as shown.

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5. Be sure to note the correct direction that the paper comes off the roll.
6. Pull out a small amount of paper, as shown. Then, close the cover.

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2-4. Dip Switch Setting
The printer is set up at the factory to be appropriate for almost all users. On the other hand,
offers some more settings for users with special requirements.
It has DIP switches that allow you to change communication setting, such as handshaking and parity
check, as well as print density.
The functions of the dip switche is shown in the following tables.
♣Note : Power off. And open the cover of Dip Switch and change setting.
2-4-1. Serial Interface Specification
DIP Switch Functions 1
SW FUNCTION ON OFF DEFAULT
2 Hexadecimal HEXDUMP NORMAL OFF
3 Hand Shaking XON/XOFF DTR/DSR OFF
DIP Switch Functions 2(Baudrate selection)
Transmission speed SW-7 SW-8
115200 bps ON ON
9600 bps OFF ON
19200 bps ON OFF
38400 bps OFF OFF
DIP Switch Functions 3
Print Density
Print Density SW-5 SW-6
Low Power ON ON
Normal OFF ON
Normal ON OFF
Dark OFF OFF
Emulation
FUNCTION SW-4
ESC Pos OFF

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♣CAUTION:
Turn off the printer while removing the DIP switch cover to prevent an electric short, which can
damage the printer.
1. Make sure the printer is turned off.
2. Remove the screw from the DIP switch cover. Then, take off the DIP switch cover as shown in
the illustration below.
3. Set the switches using a pointed tool, such as tweezers or a small screwdriver.
4. Replace the DIP switch cover.
The new settings take effect when you turn on the printer.
DETAIL A
SCALE 2:1

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♣CAUTION:
When the paper is jammed with cutter, the top cover might be stuck. In this case, repeat power on
and off 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 off.
2. Remove the screw from the DIP switch cover. Then, take off the DIP switch cover as shown in
the illustration below.
3. Turn screw with drivers to a direction until paper is released from the cutter.

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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 help you to monitor the printer’s status.
Control Panel
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
This section explains the different patterns signaled by the three LED indicators located on the top
cover of the printer.
STATUS PAPER ERROR POWER REMARKS
RED RED GREEN
Power off 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 ON ON ON Close cover
Paper empty ON ON ON Insert new paper roll
Test mode OFF OFF ON Ignored error led
3. Control panel and other functions

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The self-test lets you know if your printer is operating properly. It checks the control circuits, printer
mechanisms, print quality, ROM version and DIP switch settings.
This test is independent of any other equipment or software.
Running the self test
1. Make sure the printer is turned off and the printer cover is closed properly.
2. While holding down the FEED button, turn on the printer using the switch on the front of
the printer to begin the self-test. The Self Test prints the printer settings and then prints the
following, Cuts the paper, and pauses. (Error LED On)
Self-test printing
Please press the PAPER FEED button.
3. Press the FEED button to continue printing.
The printer prints a pattern using the built-in character set.
4. The self 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 self-test.
4. Self Test

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This feature allows experienced users to see exactly what data is coming to the printer. This can be
useful in finding software problems.
When you turn on the hex dump function, the printer prints all commands and other data in
hexadecimal format along with a guide section to help you find specific commands.
To use the hex dump feature, follow these steps
1. After you make sure that the printer is off and Dip s/w 1-2 is ON, turn on the printer.
2. Run any software program that sends data to the printer. The printer prints “Hexadecimal Dump”
and then all the codes it receives in a two-column format. The first column contains the hexadecimal
codes and the second column gives the ASCⅡ characters that correspond to the codes.
Hexadecimal 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 ASCⅡequivalent.
3. Turn off the printer, and make sure that Dip sw 1-2 off.
4. Turn on the printer.
5. Hexadecimal Dump

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Important!
When connecting or disconnecting the power supply from the printer, be sure that the following
cautions are observed.
Use a power supply (Limited Power Supply) of DC 24V±10% and more than 2.5A.
Be careful about installing the printer in an area where there is noise.
Take the appropriate measure to protect against electrostatic AC line noise, etc.
6-1. General Specifications
(1) Printing Method Direct line thermal printing.
(2) Print speed 140mm/sec.
(3) Dot density
203 DPI (Hor / Ver) 203 / 203 (0.125mm / 0.125mm dot)
(4) Printing Width
203 DPI Max 54mm (432 dots)
(5) Number of print columns.
No. of columns
Font “A” Font “B”
203 DPI 36 48
(6) Roll paper Refer to chapter 2 for details on the recommended roll Paper.
Paper width : 58.5mm~59.5mm
Roll diameter : Max. Ø60mm
(7) Weight 3.75 lbs (1.7Kg)
6. Specifications

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(8) Overall dimension
121.46
107.01
181.58

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6-2. Auto Cutter Specifications
(1) Cutting Frequency Max. 30 cuts per minute
(2) Thickness of paper 0.065 ~ 0.1mm
(3) Cutter Life 1.0 million cuttings
(if the paper thickness is between 65µm and100µm)
6-3. Interface
RS232C Serial Interface Only
6-4. Electrical Characteristics
(1) Input Voltage DC 24V ± 10%
(2) Current Consumption Operating: Approx. 1.5 A (at ASC∥printing)
Peak : Approx. 10 A
(at print duty 100%, For 10 seconds or less)
Stand-by : Approx. 0.15 A
(3) Power Connector

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♣Important!
When connecting or disconnecting the power supply from the printer, be sure that the
following cautions are observed.
(1) Use a power supply (Limited Power Supply) of DC 24V±10% and more than 2.5A.
(2) Be careful about installing the printer in an area where there is noise.
(3) Take the appropriate measure to protect against electrostatic AC line noise, etc.
6-5. Environmental Requirements
(1) Operating
Temperature 5°C to 40°C
Humidity 10% to 90% RH (without condensation)
(2) Transport/Storage (except paper)
Temperature -20°C to 60°C
Humidity 10% to 90% RH (without condensation)
6-6. Reliability
(1) MCBF 50 million lines (based on an average printing rate of 12.5% with paper
thickness in the range 65µm to 75µm)
35 million lines (based on an average printing rate of 12.5% with paper
thickness in the range 76µm to 150µm)
(2) Head Life 200 million pulses, 200Km
(3) Cutter Life 1.0 million cuttings (if the paper thickness is between 65µm and 100µm)
6-7. Certification
(1)FCC PART15 CLASS A
(2)CE EMCD/LVD
(3)MIC
(4)TUV RoHS