SANEI ELECTRIC SK1-21A Quick start guide

SK1-21A/31
A
Rev4.6E
KIOSK PRINTER
SK1-21A
Technical Guide
SK1-31A

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SK1-21A/31A
General notice
* The specifications may be changed for product improvement without notice.
* Updated information listed on our website. http://www.sanei-elec.co.jp
* Sanei shall not be responsible for any damages attributable to incorrect operation, handling or
improper operation environments, except those specified in this manual.
* Sanei shall not be responsible for any claim of infringement or alleged infringement
of patents, designs, trademarks, copyrights or other rights brought by a third party
in relation to its products.
* Operate this printer only in the manners as described in the Technical guide.
Otherwise, accidents or problems could possibly occur.
* Data are basically temporary; they cannot be stored or saved either for a long time or
permanently. Please note that Sanei Electric shall not be responsible for any damages or lost
profits resulting from the loss of data attributable to accidents, repairs, tests, and so on.
* If you have any questions, or notice any clerical errors or omissions regarding the information
in the technical guide, please contact your dealer.
* Please note that Sanei Electric shall not be responsible for any results or effects
resulting from operation of this Printer even if the information in the Technical guide.

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SK1-21A/31A
Precautions
Symboldisplay
To use this equipment safety, or to protect the equipment from damage, the following
symbols are used throughout this manual to highlight safety information
Warning The symbol indicates that failure to observe these
instructions or mishandling of this equipment could
lead to severer injury or death
Caution The symbol indicates that failure to observe these
instructions or mishandling of this equipment could
lead to injury or only property damage.
Samplesofsymbol
The symbol indicates caution(including DANGER or WARNING).
The symbol indicates the action is prohibited.
The symbol indicates a required operation that must be performed.
Whenusingtheprinter
Do not subject the printer to strong shocks by dropping or hitting it.
Avoid using the printer at the following location. It may cause failure.
◆ Locations with much dust, particles, water or oil.
◆ Locations with slanted surfaces or strong vibration.
◆ Locations with direct sunlight. near heating/warming equipments, or temperature over
60℃.
◆ Locations with temperatures of below -20℃, a relative humidity of 85％or more,
dew condensation caused by extreme temperature change.
◆ Location with electromagnetic noise or corrosive gas.
Do not touch the dot line on the thermal head and driver IC with metal and sandpaper
etc. There is a possibility for damage of those parts.
Do not touch the dot line on the thermal head with your fingures. The contamination
may reduce the printing quality.
Do not use the printer if there is condensation occurs on the thermal head. If the
condensation occurs, keep the power off until condensation evaporates completely.
Do not block the paper exit of the printer.
Do not use a volatile chemical such as thinner or benzene.for maintenance work.

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SK1-21A/31A
Do not pull the paper end from the exit forcedly when the printer cover is closed.
Turn off the printer power when trouble such as a paper jam occurs.
Do not use loose paper. It may cause paper jam.
Be careful of handling the thermal head to prevent heat elements and driver IC from
exposure to static electricity.
When setting the printer
The details such as the setting positions of the printer shall be reffered to “3-7．
Dimansions”
Set the printer horizontally to the level, and make sure so the level not to be slanted.
Handling printer unit
◆ Never disassemble or repair the printer ,AC adapter or power cord by yourself.
◆ Do not use any AC adapter and power cord other than those specified.
◆ Do not bend the AC power cord or place heavy objects on it. Doing so may damage
the cord and cause fire or electric shock.
◆ Never use a damaged AC power cord. It may cause fire or electric shock.
◆ Do not drop any metalic objects nor spill coffee,water or any other liquid.
◆ Do not use the printer in a places where it will be exposed to excess moisture
or water spray. It may result in electric shock, short circuit and failure.
◆ Do not connect or disconnect the ACadapter with wet hands. It may result in
electric shock, short circuit and failure.
As the thermal head may be very hot immediately after printing, do not touch it to
avoid burning your fingers. Be sure that the thermal head is cool before replacing a
paper or cleaning the thermal head.
Do not open the paper cover while printing.
Do not pull the paper when the cover is closed.
◆In the following cases, turn the printer power OFF and unplug the AC power cord from
the outlet.
・Smoke, unusual noises or odd smells are emittied by the printer.
・When metallic objects is dropped or any liquid is spilled inside the printer.
◆Continueous use may lead to printer failure,fire and electric shock.
◆Make sure the fault does not continue and contact dealers for further assistance.
If the printer is not to be used, turn the printer power OFF and leave the AC adapter
disconnected from the outlet.
Warning
Caution

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SK1-21A/31A
Remove the interface cable or AC adapter from the connector or the receptacle by
gripping the connector or the AC plug. Never pull the cable itself.
Doing so may damage the cable or adapter.
Handling Paper Roll
Use the specified paper or equivalent. Use of other paper may reduce life of the
thermal head and cause a decrease in printing quality
Especially sodium(Na+)、potassium(K+) and chlorine(Cl-) containing substances can
remarkably reduce the life of the thermal head.
Store the paper in a dry, cool and dark place.
When pasting printed pages, use water-bnased glue. (starch glue, synthetic glue, etc.)
The surface of thermal paper has been specially treated with a chemical agent to
produce coloring by thermal chemical reaction.
◆ Do not expose the paper for a long time under bright light.
◆ Avoid storing in high temperature, high humidity,damp area and
direct sunlight.
◆ Do not rub the paper with hard objects.
◆ Keep the paper away from organic solvents.
◆ Do not let the paper touch vinyle chloride film, erasers or adhesive tapes for hours.
◆ Do not place he paper on diazo print paper or wet, freshly made paper copies.
◆ Do not touch the paper with wet hands. It may cause fingerprint to be marks on the
paper or smudges.

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SK1-21A/31A
Table of contents
1．General Outlines......................................................................................... ８
1- 1．Product Outlines ......................................................................................................８
1- 2．Features ....................................................................................................................８
1- 3．Classification............................................................................................................９
2．Handling Method .................................................................................... １１
2- 1．Recommendable paper and printer options...................................................... １１
2- 2．Appearance........................................................................................................... １２
2- 3．Inside Structures..................................................................................................１３
2- 4．Setting Paper Roll ................................................................................................１４
2- 5．Paper near-end sensor ........................................................................................ １５
2- 6．Changing 1-inch core adapter ............................................................................ １６
2- 7．Adjust the paper position....................................................................................１６
2- 8．Clear paper jams ..................................................................................................１７
3．General specifications........................................................................... １８
3- 1．Specifications.......................................................................................................１８
3- 2．Sensor ...................................................................................................................２０
3- 3．Printing area .........................................................................................................２１
3- 4．Print head and cutter position ............................................................................２１
3- 5．Paper sensor position .........................................................................................２２
3- 6．Paper feeding .......................................................................................................２４
3- 7．Dimensions........................................................................................................... ２５
4．Functions ................................................................................................ ２９
4- 1．Self test printing................................................................................................... ２９
4- 2．HEX Dump mode..................................................................................................３０

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SK1-21A/31A
4- 3．Function setting mode ........................................................................................３０
4- 4．Setting the memory switch ................................................................................. ３２
4- 5．Memory switch setting menue............................................................................３３
4- 6．Adjusting printing density .................................................................................. ３５
4- 7．LED display .......................................................................................................... ３５
4- 8．Memory .................................................................................................................３７
5．Bezel Module .......................................................................................... ３８
5- 1．Operating Mode....................................................................................................３８
6．Presenter................................................................................................. ３９
6- 1．Specifications.......................................................................................................３９
6- 2．Operating Mode....................................................................................................３９
6- 3．Stock space and Exit space................................................................................４０
7．Interfaces ................................................................................................ ４１
7- 1．USB........................................................................................................................４１
7- 2．Serial .....................................................................................................................４２
7- 3．Power supply........................................................................................................４４
8．Label print ............................................................................................... ４５
9．Maintenance............................................................................................ ４９
9- 1．Maintenance .........................................................................................................４９
9- 2．Service for trouble shooting ............................................................................... ５０
10．Command systems .............................................................................. ５１
10- 1．Command table ..................................................................................................５１
10- 2．Data code table .................................................................................................. ５４

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SK1-21A/31A
1．General Outlines
1- 1．Product Outlines
SK1-21(2-inch) & SK1-31(3-inch) are open frame printers equipped with Serial (RS232C) and
USB interface. Super-compact design and ruburst body make it possible for installing limited space
enclosures under wide range of operating environment. The reliable SK1 printers performimg
for versatile functions are ideal for a wide variety of kiosk systems.
1- 2．Features
■Small and Ultra-Light Weight, Designed for wide variety of systems and equipments
■Max 200mm/sec high-speed printing
■Variety of paper core holders (adjustable for half inch and 1-inch inner core roll)
■1D and 2D (Option) Barcode printing
■Max φ120mm paper roll as standard
■Various Sensors built-in : Paper near end, Paper empty, Head open sensor, Black-Mark sensor
(Option), Gap sensor (Option)
■Wide variety of paper size (58, 60, 80, 83mm)
■Autoloading function
■Selectable for Partial cut or Full cut
■Versatile operating environment
■Available for Windows driver,Utility Driver and Linux driver
■Available for Remote Status Monitor
＜Other functions＞
Capable of HEX dump printing and self test printing.
Various settings of characters, such as enlarged and upside down characters
Adjustable for printing line space.
Graphic printing by bit image.
Downloaded characters and user-defined characters can be printed.
Adjustable for paper feed amount.
With Ruled Line command, table layouts can be easily printed.
Page Mode allows erect/inverse images, clockwise 90 degrees/counterclockwise 90
degrees and overlapping printing.
Page Mode allows setting the paper length to a maximum of 250mm.
Using the Image Registration command, the printing layout can be set up beforehand.
With the Printing Density command, the printing density can be changed.
The command system conforms to ESC/POSTM.
Capable of registering print images in internal flash memory.

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SK1-21A/31A
1- 3．Classification
The product is classified according to the Product Number as follows:
<3-inch Kiosk printer>
SK1-31 A S J 3 - 3 L Q B
Option
B ： Bezel
P ： Presenter
D ： LED Bezel
2-Dimensional Barcode
Q ： Installed
Without Q： Not available
Paper Core Diameter
L ： φ25.4mm
Without M/L ： φ12mm
Paper Width
1 ：58.0mm
2 ：60.0mm
3 ：83.0mm
Without 1/2/3 ：80.0mm
Sensor：
1: Black mark（Right）
2: Black mark（Left）
3: Gap sensor
4: Gap sensor & Black mark（Right）
5: Gap sensor & Black mark（Left）
Without 1/2/3/4/5 : None
Font
J ：Japanese Font
F ：ASCII
Interface
S ：Serial ＋USB
Paper Holder type
A ：Arm Unit LA/RA
Series
SK1-31 ：
3” model

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SK1-21A/31A
<2-inch Kiosk printer>
SK1-21 A S J 3 - 1 L Q B
Option
B ： Bezel
P ： Presenter
D ： LED Bezel
2-Dimensions Barcode
Q ： Installed
Without Q： Not available
Paper Core Diameter
L ：φ25.4mm
Without M/L ：φ12mm
Paper Width
Without ：58.0mm
1 ：60.0mm
Sensor
Without：Reflection Sensor(Right)
1：Reflection Sensor(Left)
2：Gap Sensor + Reflection Sensor(Right)
3：Gap Sensor + Reflection Sensor(left)
Font
J ：Japanese
F ：ASCII
Interface
S ：Serial ＋USB
Paper Holder type
A ：Arm Unit LA/RA
Series
SK1-21： 2” model

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SK1-21A/31A
2．Handling Method
2- 1．Recommendable paper and printer options
It is recommended to use the following paper for printing at SK1 Kiosk printers.
(The paper rolll can be purchased through the stores/shops you have purchase and the details of the
paper information can be inquired to the stores/shops and/or distributors)
1. Recommendable paper
Specifications Recommendable paper
Part No. TF50KS-E2D (Nippon Paper Industries)
Sensitivity Standard duration
Paper width 57.5±0.5mm 79.5±0.5mm
Thickness 59µm
Roll diameter Φ120mm or less
Core Internal dia. Φ12×External dia.Φ18mm
Thermal paper side External
Internal paper end No adhesion・No fold
External paper front Cut straight and put a seal
End mark
A red stripe on one side of the paper
Width: 2 to 5mm
Length: 500±100mm
2. Printer options
It is available for the following options for SK1-21/31 Kiosk printers.
Option contents Name Specifications
Large paper holder HL2-SK1 Paper holder for φ200mm diameter
Large paper holder HL3-SK1 Paper holder for φ200mm diameter
1-inch Core adapter BUSH 24.9 Attachment core holder for φ25.4mm diameter
Serial cable CB-SK1-S4 Cross connection, approx 60cm, D-Sub9
DC cable CB-SK1-D1 DC cable, approx 1m
USB cable BLM-1.5U USB cable, approx 1.5m
AC adapter SA3-27A24O-1 Standard AC adapter (24V)

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SK1-21A/31A
2- 2．Appearance
①Paper holder : Φ120mm paper roll is installed.
②Head open lever : Printer head is opened by side lever
③Chassis fixture hole : Mmounting the printer on screws
④Status LED : Printer status is shown by LED ramp
⑤FEED Switch : Feeeding the paper
⑥SELECT Switch : Use for setting the printer and printing HEX dump
⑦Gap sensor adjustment screw : Adjust the sensitivity of label gap
⑧Near end sensor : Detect paper near end
⑨Power supply connector : for DC power supply
⑩Serial connector : for Serial
⑪USB connector : for USB
⑫1-inch core adapter : for1-inch inner core of paper roll
The standard model is not installed core adapters.
②Head open lever
①Paper Holder
③Chassis fixture hole
⑥SELECT Switch
⑤FEED Switch
④Status LED
⑦Gap Sensor adjustment screw
⑧Near End Sensor
⑪USB Connector
⑩Serial Connector
⑨Power-supply Connector
⑫1-inch core adapter

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SK1-21A/31A
2- 3．Inside Structures
① Print thermal head
Print characters and graphics to thermal papers.
②Paper end sensor
Detect paper empty. If the sensor detects paper empty, the printer stops printing.
③Platen roller
Feed the thermal paper on friction with the print head.
④Auto cutter
Cut the thermal paper (Selectable for full cut or partial cut)
①Print thermal head
②Paper Eempty Sensor
③Platen roller
④Auto cutte
r

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SK1-21A/31A
2- 4．Setting Paper Roll
① Set a roll paper to paper holder.
Widening one side of paper holder and putting in the roll paper. Then setting the paper to
holder.
②Use head open lever
Press the head open lever to lift the head unit as shown in below.
Set the paper pulling out the paper end straightforward and close the head unit.
2. Auto-loading system
The paper is passed through thermal head as following, paper is set to feed automatically
when the paper-empty sensor detects the paper.

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SK1-21A/31A
2- 5．Paper near-end sensor
Sensing roll paper’s remaining amount can be adjusted in three levels by sliding near-end-sensor.
The level is set based on core’s diameter in factory default.
Adjusting knob on the holder must be slide in the direction of an arrow by using a fine-tipped tool like
tweezers.
（Unit：mm）
Position Detectable paper diameter
1 φ21.0±2mm
2 φ24.5±2mm
3 φ35.0±2mm
・Do not mount the printer on vibrating or slanted surfaces.
・The external diameter should be used as a reference value.
Near-end sensor
Adjusting
knob
Scale
Enlarged view
Slide direction
Scale
Slide direction
Adjusting
knob
Adjusting Knob is set at No.3 when 1-inch core
adapter is installed.
Enlarged view
Near-end sensor
1-inch core
adapter

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SK1-21A/31A
2- 6．Changing 1-inch core adapter
1. How to change 1-inch core adapter
Roll paper can be replaced by changing from standard φ12mm to φ25.4mm.
1-1. How to attach the the attachment holders
Mount attachment holders to mounting holes.
1-2. How to detatch attachment holder
Clip the attachment holder and pull away in the direction of an arrow below.
2- 7．Adjust the paper position
1. How to change the position of Holder arm.
Three types of roll paper (φ120mm, φ102mm, φ83mm in diameter) is available by setting positoin of
holder arms.
1-1. How to setting
Detach polyslider and pull out shaft, and then detach holder arm.
Next, put a spring on a projection and set the holder arm on the spring.
Finally, put the shatf and fix it by the polyslider.
Mounting holes
Push and attach
1-inch core
adapter
1-inch core
adapter
Pull away from the
Attachment holder.

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SK1-21A/31A
2- 8．Clear paper jams
1．First of all, turn OFF the printer power.
2．Press the head open lever to lift up the print head.
3．Remove the jammed paper.
4．Close the print head and turn ON the power.
Turn the printer power OFF.
Don’t put fingers into paper exit.
Press the head open lever to
lift up the print head. Remove the jammed paper

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SK1-21A/31A
3．General specifications
3- 1．Specifications
Model SK1-31A SK1-21A
Printing method Direct line thermal
Paper width 58/60/80/83mm 58/60mm
Print width 54/56/72/80mm 54/56mm
Number of dots 432/448/576/640dot 432/448dot
Resolution 8dot/mm(203dpi)
Maximum printing speed Max.200 mm/s *Note 1
Paper holding method Φ120mm paper holder
Interface Serial(Max.115.2kbps), USB2.0
ASCⅡ
PC437/850/852/857/858/863/865/866/860/862/864/737
WPC1252/1252_2/1254/1250/1251
Square form of kana (the Japanese syllabary)
Charactors
Download available
Printing Width Printing Width：54/56/72/80mm
ASCⅡ16 dots 8×16 dots(W×H) 54/56/72/80 lines
ASCⅡ24 dots 12×24 dots(W×H) 36/37/48/53 lines
Jfont 16 dots 16×16 dots(W×H) 27/28/36/40 lines
Font
/Dots/
Lines
Jfonrt 24 dots 24×24dots(W×H) 18/18/24/26 lines
Paper Sensors
Near end Sensor/Paper empty Sensor
(OPTION) BM(Black mark)
Sensor/Gap Senssor
Near end Sensor/Reflection Sensor
(OPTION) Gap Sensor
Memory Input buffer 8k bytes
User memory、Non-volatile memory
Logo registration Download bit image
Barcode UPC-A/E、JAN13/8、CODE39、ITF、CODABAR、CODE128
2D bar code（Option）QR、MaxiCode、MicroPDF417、PDF417、DataMatrix
Command systems ESC/POS compatible *Note 2
Setting position Horizontal surface
Regulation VCCI, FCC, CE, CLASS A
Printing life Pulse activation 200million pulses or more Note3
Abrasion resistance 150Km or more
Cutter life Cutting life 1.5 million cuts or more (Thickness 75um or less)
Power supply DC Power supply
DC 24V±5% / TYP 2.7A
Current consumption Standby： 70mA or less
Printing： Average 2.5A *Note 3 (Peak 7.5A)

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SK1-21A/31A
*Note1：Use AC adapter, printing rate less than 25%.
*Note2：ESC/POS is registered trademark of Seiko Epson Corporation.
*Note3：DC24.0V, Printing rate 12.5%, at room temperature
*Note4：Not permitted with the smaller width paper roll.
Friction between the head and the platen roll in the no paper area may degrade print quality.
Model SK1-31A SK1-21A
Operating environment
Temperature： -20℃to +60℃
Humidity： 20%RH to 85%RH（No condensation）
Printing quality is guaranteed from+5℃to +40℃
Guaranteed area of acceptable temperature and humidity
Storage environment Temperature： -30℃to +70℃
Humidity： 10%RH to 90%RH（No condensation）
Weight 630g（Without paper roll）525g（Without paper roll ）
φ83mm 127×129.2×73.6mm(W×D×H) 104×129.2×73.6mm(W×D×H)
φ102mm 127×137.3×79.5mm(W×D×H) 104×137.3×79.5mm(W×D×H)
Dimensions
(without
protruding
parts) φ120mm 127×145.5×85.4mm(W×D×H) 104×145.5×85.4mm(W×D×H)
Paper roll
Paper width: 58 / 60 / 80 / 83 mm Note 4 & supplement
Paper thickness： 59µm to150µm (52g/m2to 128g/m2)
External dimensions： φ120mm or less
Core diameter：
Internal/External dia. φ12.0mm/18mm
Internal/External dia. φ25.4mm/31.4mm
Standard of print density
Part No. Thickness Print density
TF50KS-E2D 59µm 1.0
TF11KS-ET 145µm 1.2
P220AC 105µm 1.1
PD160 75µm 1.05
HP220A 65µm 1.0
Fan fold：
The printer prints fan fold paper. For further information,
please contact a local dealer.

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SK1-21A/31A
3- 2．Sensor
(1) Paper-end sensor
The paper-end sensor is installed into the paper path and the photo-interrupter detects the
existence of paper in the printer. When the paper runs out, the red LED lights and the printer
goes into error mode and stops in the printing process.
After the paper is replaced, the printer resumes printing.
・Once the paper end sensor sends the paper empty signal, the printer stops printing.
・As soon as the paper end strip appears, replace the paper roll.
(2) Head open sensor
The head open sensor detects whether the print head is open or closed. Once the sensor detects
the head open signal, the printer stops printing and goes OFF-Line, the Error LED lights Red. The
printer resumes printing after the head is closed.
(3) Thermistor
The thermistor built in the print head detects the temperature of the print head.
If printing at a high printing rate for a long time, the print head temperature rises and
the head may become overheated. To prevent overheating, the printer stops printing when the
temperature is beyond a certain level, and blinks the red Error LED.