Citizen CT-S251 Service Manual

LINE THERMAL PRINTER

MODEL CT-S251

User’s Manual

WEEE MARK

En

Wenn Sie dieses Produkt entsorgen wollen, dann tun Sie dies bitte nicht zusammen mit dem
Haushaltsmüll. Es gibt im Rahmen der WEEE-Direktive innerhalb der Europäischen Union
(Direktive 2002/96/EC) gesetzliche Bestimmungen für separate Sammelsysteme für gebrauchte
elektronische Geräte und Produkte.

Ge

Si vous souhaitez vous débarrasser de cet appareil, ne le mettez pas à la poubelle avec vos
ordures ménagères. Il existe un système de récupération distinct pour les vieux appareils
électroniques conformément à la législation WEEE sur le recyclage des déchets des
équipements électriques et électroniques (Directive 2002/96/EC) qui est uniquement valable
dans les pays de l’Union européenne.
Les appareils et les machines électriques et électroniques contiennent souvent des matières
dangereuses pour l’homme et l’environnement si vous les utilisez et vous vous en débarrassez
de façon inappropriée.

Fr

Si desea deshacerse de este producto, no lo mezcle con residuos domésticos de carácter
general. Existe un sistema de recogida selectiva de aparatos electrónicos usados, según
establece la legislación prevista por la Directiva 2002/96/CE sobre residuos de aparatos
eléctricos y electrónicos (RAEE), vigente únicamente en la Unión Europea.

Sp

Se desiderate gettare via questo prodotto, non mescolatelo ai rifiuti generici di casa. Esiste
un sistema di raccolta separato per i prodotti elettronici usati in conformità alla legislazione
RAEE (Direttiva 2002/96/CE), valida solo all’interno dell’Unione Europea.

It

Deponeer dit product niet bij het gewone huishoudelijk afval wanneer u het wilt verwijderen. Er
bestaat ingevolge de WEEE-richtlijn (Richtlijn 2002/96/EG) een speciaal wettelijk
voorgeschreven verzamelsysteem voor gebruikte elektronische producten, welk alleen geldt
binnen de Europese Unie.

Du

Hvis du vil skille dig af med dette produkt, må du ikke smide det ud sammen med dit almindelige
husholdningsaffald. Der findes et separat indsamlingssystem for udtjente elektroniske produkter
i overensstemmelse med lovgivningen under WEEE-direktivet (direktiv 2002/96/EC), som
kun er gældende i den Europæiske Union.

Da

Se quiser deitar fora este produto, não o misture com o lixo comum. De acordo com a legislação
que decorre da Directiva REEE – Resíduos de Equipamentos Eléctricos e Electrónicos (2002/
96/CE), existe um sistema de recolha separado para os equipamentos electrónicos fora de
uso, em vigor apenas na União Europeia.

Por

Pol

Jeżeli zamierzasz pozbyć się tego produktu, nie wyrzucaj go razem ze zwykłymi
domowymi odpadkami. Według dyrektywy WEEE (Dyrektywa 2002/96/EC)
obowiązującej w Unii Europejskiej dla używanych produktów elektronicznych
należy stosować oddzielne sposoby utylizacji.

If you want to dispose of this product, do not mix it with general household waste. There is a
separate collection systems for used electronics products in accordance with legislation under
the WEEE Directive (Directive 2002/96/EC) and is effective only within European Union.

Declaration of Conformity

This printer conforms to the following Standards:

The Low Voltage Directive 2006/95/EC, the EMC Directive 2004/108/EC, the RoHS
Directive 2011/65/EU, and the WEEE Directive 2002/96/EC.

LVD : EN60950-1

EMC: EN55022 Class A

EN61000-3-2
EN61000-3-3
EN55024

This declaration applies only to the 230-V model.

IMPORTANT: This equipment generates, uses, and can radiate radio frequency
energy and if not installed and used in accordance with the instruction manual, may
cause interference to radio communications. It has been tested and found to comply
with the limits for a Class A computing device pursuant to Subpart J of Part 15 of FCC
Rules, which are designed to provide reasonable protection against such interference
when operated in a commercial environment. Operation of this equipment in a
residential area is likely to cause interference, in which case the user at his own
expense will be required to take whatever measures may be necessary to correct the
interference.

CAUTION: Use shielded cable for this equipment.

Sicherheitshinweis

Die Steckdose zum Anschluß dieses Druckers muß nahe dem Gerät angebracht und
leicht zugänglich sein.

For Uses in Canada
This Class A Information Technology Equipment (ITE) complies with Canadian CAN
ICES-3(A)/NMB-3(A).
This Information Technology Equipment (ITE) does not exceed the Class A limits for
radio noise emissions from digital apparatus set out in the Radio Interference
Regulations of the Canadian Department of Communications.
Pour L’utilisateurs Canadiens
Cet Equipements informatiques (EI) de la classe A est conforme a la norme CAN
ICES-3(A)/NMB-3(A) du Canada.
Le present Equipements informatiques (EI) n’emet pas de bruite radio electriques
depassant les limites applicables aux appareils numeriques de la classe A prescrites
dans le Reglement sur le brouillage radioelectrique edicte par le ministere des
Communications du Canada.

GENERAL PRECAUTIONS

 Before using this product, be sure to read through this manual. After having

read this manual, keep it in a safe, readily accessible place for future reference.

 The information contained herein is subject to change without prior notice.
 Reproduction or transfer of part or all of this document in any means is

prohibited without permission from Citizen Systems.

 Note that Citizen Systems is not responsible for any operation results

regardless of omissions, errors, or misprints in this manual.

 Note that Citizen Systems is not responsible for any trouble caused as a result

of using options or consumables that are not specified in this manual.



Except explained elsewhere in this manual, do not attempt to service, disassemble,
or repair this product.

 Note that Citizen Systems is not responsible for any damage attributable to

incorrect operation/handling or improper operating environments that are not
specified in this manual.

 Data is basically for temporary use and not stored for an extended period of

time or permanently. Please note that Citizen Systems is not responsible for
damage or lost profit resulting from the loss of data caused by accidents,
repairs, tests or other occurrences.

 If you find omissions, errors, or have questions, please contact your Citizen

Systems dealer.

 If you find any pages missing or out of order, contact your Citizen Systems

dealer for a replacement.

"Made for iPod," "Made for iPhone," and "Made for iPad" mean that an electronic
accessory has been designed to connect specifically to iPod, iPhone, or iPad,
respectively, and has been certified by the developer to meet Apple performance
standards. Apple is not responsible for the operation of this device or its compliance
with safety and regulatory standards.
Please note that the use of this accessory with iPod, iPhone or iPad may affect
wireless performance.

 iPad, iPhone and iPod touch are trademarks of Apple Inc., registered in the U.S. and other

countries. iPad Air and iPad mini are trademarks of Apple Inc.

 EPSON and ESC/POS are registered trademarks of Seiko Epson Corporation.
 QR Code is a registered trademark of DENSO WAVE INCORPORATED.

 Bluetooth
 CITIZEN is a registered trade mark of Citizen Holdings Co., Japan.
 CITIZEN es una marca registrada de Citizen Holdings Co., Japón.
 All other trademarks are the property of their respective owners.
 Citizen Systems use these trademarks in accordance with the license of relevant owners.

®

is a registered trademark of Bluetooth-SIG Inc.

Copyright ©2015 by CITIZEN SYSTEMS JAPAN CO., LTD.

—1—

SAFETY PRECAUTIONS...

WARNING

CAUTION

Before using this product for the first time, carefully read these SAFETY
PRECAUTIONS. Improper handling may result in accidents (fire, electric shock or
injury).
In order to prevent injury to operators, third parties, or damage to property, special
warning symbols are used in the User’s Manual to indicate important items to be
strictly observed.

 After having read this Manual, keep it in a safe, readily accessible place for future

reference.

 Some of the descriptions contained in this manual may not be relevant to some

printer models.

The following describes the degree of hazard and damage that could occur if the
printer is improperly operated by ignoring the instructions indicated by the warning
symbols. Be sure to read this information carefully.

Neglecting precautions indicated by this symbol may result in fatal or serious
injury.

Neglecting precautions indicated by this symbol may result in injury or damage
to property.

WHICH SHOULD BE STRICTLY OBSERVED

This symbol is used to alert your attention to important items.

This symbol is used to alert you to the danger of electric shock or electrostatic
damage.

This symbol denotes a request to unplug the printer from the wall outlet.

This symbol is used to indicate that the power supply must be grounded.

This symbol is used to indicate useful information, such as procedures,
instructions or the like.

This symbol is used to indicate prohibited actions.

—2—

PRECAUTIONS ON PRINTER INSTALLATION

WARNING

 Do not use or store this product in a place where it will be exposed to:

* Flames or moist air.
* Direct sunlight.
* Hot airflow or radiation from a heating device.
* Salty air or corrosive gases.
* Ill-ventilated atmosphere.
* Chemical reactions in a laboratory.
* Airborne oil, steel particles, or dust.
* Static electricity or strong magnetic fields.

• These locations create the risk of printer damage, as well as product
failure, overheating, emission of smoke, fire, or electric shock.
They can also result in fire or electric shocks and so should always be
avoided.

 Do not drop any foreign object nor spill liquid into the printer. Do not

place any object on the printer either.

 Do not drop any metallic object such as paper clips, pins or screws

into the printer.

 Do not place a flower vase, pot, or anything containing water on the

printer.

 Do not spill coffee, soft drinks, or any other liquid into the printer.
 Do not spray insecticide or any other chemical liquid over the printer.

• Dropping a metallic foreign object into the printer, may cause printer
failure, fire, or electric shock.
Should it occur, immediately turn the printer off, unplug it from the
supply outlet, and call your local Citizen Systems dealer.

Do not handle the printer in the following ways:

 Do not subject the printer to strong impacts or hard jolts (e.g., being

stepped on, dropped or struck).

 Never attempt to disassemble or modify the printer.

• These actions create the risk of printer damage, as well as product
failure, overheating, emission of smoke, fire, or electric shock.
They can also result in fire or electric shocks and so should always be
avoided.

 Install, use, or store the printer out of the reach of children.

• Electric appliances could cause an unexpected injury or accident if
they are handled or used improperly.

• Keep the power cord and signal cables out of the reach of children.
Also children should not be allowed to gain access to any internal
part of the printer.

• The plastic bag the printer came in must be disposed of properly or
kept away from children. Wearing it over the head may lead to
suffocation.

—3—

CAUTION

Do not use the printer under the following conditions.

 Avoid locations subject to vibration or instability.
 Avoid locations where the printer is not level.

• The printer may fall and cause an injury.

• The quality of printing may deteriorate.

 Do not obstruct the printer’s air vents.
 Do not place anything on the printer.
 Do not cover or wrap the printer in cloth or blankets.

• Doing so could cause heat to build up and deform the case or start a
fire.

 Avoid using the printer near a radio or TV set or from supplying it from the

same electric outlet as these appliances.

 Avoid using the printer interconnected with a cable or cord that has no

protection against noise.
(For interconnections, use shielded or a twisted pair of cables and ferrite
cores, or other anti-noise devices.)

 Avoid using the printer with a device that is a strong source of noise.

• The printer may have an adverse effect on nearby radio or TV
transmissions. There may also be cases when nearby electrical
appliances adversely influence the printer, causing data errors or
malfunction.

 Installed in any orientation other than those specified.

• Malfunction, failure, or electric shock may result.

 Connect the printer to a ground.

• Electric leakage may cause an electric shock.

 Do not connect the printer’s ground to any of the following:

* Gas piping

• A gas explosion could result.
* Telephone line ground
* Lightning rod

• If lightning strikes a large surge of current may cause fire or shock.
* Water pipes

• Plastic water pipes should not be used for grounding. (Those

approved by a Waterworks Department may be used.)

 Before connecting or disconnecting the grounding lead to or from the

printer, always unplug it from the electric outlet.

—4—

PRECAUTIONS IN HANDLING THE PRINTER

WARNING

Please observe the following precautions for power source and power
cord:

 Do not plug or unplug the power cord with a wet hand.
 Use the printer only at the specified supply voltage and frequency.
 Use only the specified AC adapter with the printer.
 Use only the power cord that comes with the printer, and never use the

supplied power cord with another device.

 Check to make sure that the supply outlet from which the printer is

powered has a sufficient capacity.

 Do not supply the printer from a power strip or current tap shared with

other appliances.

 Do not plug the power cord into an electric outlet with dust or debris left on

the plug.

 Do not use a deformed or damaged power cord.
 Do not move the printer while its power is on.

• Neglecting to handle it properly may result in printer failure, emission
of smoke, fire, or electric shock.

• An overload may cause the power cord to overheat, catch fire, or the
circuit breaker to trip.

 Do not allow anything to rest on the power cord. Do not place the printer

where the power cord may be stepped on.

 Do not subject the power cord to severe bending, twisting, or pulling. Do

not carry the product while it is in this state either.

 Do not attempt to modify the power cord unnecessarily.
 Do not place the power cord near any heating device.

• Neglecting these cautions may cause wires or insulation to break,
which could result in electric leakage, electric shock, or printer failure.
If the power cord sustains damage, contact your Citizen Systems
dealer.

 Do not leave things around the electric outlet.
 Supply power to the printer from a convenient electric outlet, readily

accessible in an emergency.

• Pull the plug to immediately shut it down in an emergency.

 Insert the power plug fully into the outlet.
 If the printer will not be used for a long time, disconnect it from its electric

outlet.

 Hold the plug and connector when plugging or unplugging the power cord

or signal cable after turning off the printer and the appliance connected to it.

—5—

CAUTION

Caution label is attached in the position shown in the following figure. Carefully read

THIS LABEL INDICATES THE RISK OF
BURNS DUE TO THE HIGH
TEMPERATURE OF THE PRINT HEAD AND
A RISK OF BEING CUT BY THE AUTO
CUTTERS WHILE THE PAPER COVER IS
OPEN.

the handling precautions before using the printer.

 Do not transport this printer with the paper roll inside.

• Printer failure or damage may occur.

To prevent possible malfunction or failure observe the following.

 Do not open the paper cover during printing.
 Avoid operating the printer without paper properly loaded.
 Avoid the use of paper not complying with specifications.

• May result in poor print quality.

 Avoid using torn pieces of paper or paper spliced with plastic adhesive tape.
 Avoid forcibly pulling already loaded paper by hand.
 Avoid using a sharp pointed device to operate panel buttons.

 Be sure to firmly insert the cable plugs into their mating sockets.

• A cross connection may damage the printer’s internal electronics or
the host system’s hardware.

Only use the printer with devices that have designated solenoid specifications
for the cash drawer interface connector.

• Neglecting this caution may result in malfunction or failure.

—6—

To prevent injury and printer failures from worsening, observe the following:

CAUTION

If the printer emits smoke, an odd smell, or unusual noise while
printing, immediately abort the current print session and
unplug the printer from the electric outlet.

Visit the following site to get documentation, drivers, utilities, and other information.
http://www.citizen-systems.co.jp/english/support/index.html

 Do not touch the printing surface of the thermal head.
 Do not touch any of the moving parts (e.g., paper cutter, gears, active

electric parts) while the printer is working.

 In case of trouble do not attempt to repair the printer. Ask Citizen Systems

service for repair.

 Be careful that the covers do not pinch your hands or fingers.
 Be careful of the sharp edges on the printer. Do not allow them to injure you

or damage property.

• May result in electric shock, burn, or injury.

DAILY MAINTENANCE

Observe the following precautions for daily maintenance.
 When cleaning the printer, always turn it off and unplug it from the electric

outlet.

 Use a soft, dry cloth for cleaning the surface of the printer case.

For severe stains, use a soft cloth slightly dampened with water.
Never use organic cleaning solvent such as alcohol, paint thinner,
trichloroethylene, benzene, or ketone. Never use a chemically processed
cleaning cloth.

 To remove paper dust, use a soft brush.

• The thermal head is at a dangerously high temperature immediately after printing.
Allow it to cool off before starting maintenance work.

—7—

THE TABLE OF CONTENTS

1. GENERAL OUTLINE ....................................................................9

1.1 Features...........................................................................................9

1.2 Unpacking...................................................................................... 10

1.3 Model Classification ...................................................................... 10

1.4 Basic Specifications....................................................................... 11

2. EXPLANATION OF PRINTER PARTS .......................................12

2.1 Printer Appearance ........................................................................ 12

2.2 Inside the Paper Cover ..................................................................15

2.3 Other Built-in Functions................................................................. 16

3. SETUP ........................................................................................18

3.1 Connecting the AC Power Cord .................................................... 18

3.2 Connecting Interface Cables ......................................................... 19

3.3 Bluetooth Interface Board ............................................................. 20

3.4 Ethernet (LAN) Interface Board ..................................................... 22

3.5 Wireless LAN Interface Board .......................................................25

3.6 Connecting the Cash Drawer ........................................................ 29

3.7 Precautions for Installing the Printer ............................................. 31

3.8 Adjusting the Paper Near-end Sensor ........................................... 32

3.9 Loading Paper................................................................................ 33

3.10 Installing a Driver ......................................................................... 34

3.11 Precautions for Creating Applications and

Practical Operations..................................................................... 34

4. MAINTENANCE AND TROUBLESHOOTING........................... 35

4.1 Periodic Cleaning ........................................................................... 35

4.2 Clearing a Cutter Error ................................................................... 36

4.3 Self Test ........................................................................................ 37

4.4 Hexadecimal Dump Printing .......................................................... 38

4.5 Error Indications.............................................................................39

4.6 Paper Jams.................................................................................... 41

4.7 Serial Interface Operation Precautions.......................................... 41

5. OTHER .......................................................................................42

5.1 External Views and Dimensions ....................................................42

5.2 Printing Paper ................................................................................43

5.3 Manual Setting of Memory Switches............................................ 44

—8—

1. GENERAL OUTLINE

The CT-S251 line thermal printer series is designed for use with a broad array of
terminal equipment including data, POS, and kitchen terminals.
These printers have extensive features so they can be used in a wide range of
applications.

1.1 Features

 High-speed (300 mm/s) printing
 Attractive, stylish design
 Design so compact it can be installed anywhere
 Paper is output from the front so the printer can be placed in a place that has a

height limitation

 Equipped with a fast cutter
 Printer status and errors indicated by five LEDs
 Interchangeable interface board
 Built-in cash drawer kick-out interface
 USB power supply OFF
 16 level greyscale and clear printing
 Paper saving functions
 Level 3 and Level 4 kanji (JIS X0213) support
 Memory switches make customization possible
 Store user-defined characters and logos on user memory
 Barcode and 2D barcode printing supported
 Driver and utility software included
 Apple MFi certified Bluetooth communication support (Bluetooth model)

—9—

Note:

1.2 Unpacking

Printer

AC adapter

(36AD2/37AD5)

AC power cord

Quick Start Guide CD-ROM

Sample paper

roll

CT - S251 RS E- BK

Interface
RS: Serial RS-232C
UB: USB
ET: Ethernet+USB
BT: Bluetooth+USB
WF: Wireless LAN+USB

Market

*

J: Japan E: Europe
U: North America C: China
A: Asia, Oceania

Body case color
WH: Pure white
BK: Black
NN: No finish

Make sure the following items are included with your printer.

 Printer: 1
 AC power cord: 1
 Sample paper roll: 1 roll

 CD-ROM: 1
 Quick Start Guide: 2
 AC adapter: 1

1.3 Model Classification

Model numbers indicate printer features according to the following system.

*: AC power cord, serial I/F screw, firmware and other specifications vary according to markets.

—10—

1.4 Basic Specifications

Item Specifications

Model CT-S251
Print method Line thermal dot print method
Print widths 54.5 mm/436 dots, 54 mm/432 dots, 52.5 mm/420 dots, 48.75 mm/390 dots, 48

Dot density 8 × 8 dots/mm (203 dpi)
Print Speed 300 mm/s (fastest, print density 100%, 2400 dot-lines/s)
Number of print

*1

columns

Character size

Character type Alphanumeric, international, PC437/850/852/857/858/860/863/864/865/866,

User memory 384 KB (capable of storing user-defined characters and logos)
Bar code types UPC-A/E, JAN(EAN) 13 digits/8 digits, ITF, CODE39, CODE128, CODABAR(NW-7),

Line spacing 4.25 mm (1/6 inch) (Variable by command)
Paper roll Paper roll: 58 mm × 83 mm max.

Interface Serial (RS-232C standard), USB, Bluetooth+USB, LAN, wireless LAN+LAN
Cash drawer kick-out Supports 2 cash drawers
Input buffer 4 K bytes/45 bytes
Supply voltage DC 24 V ±5%
Power consumption Approximately 2.0 A (average), approximately 0.1 A (standby)
AC adapter

(36AD2/37AD5)
Weight Approximately 1.3 kg
Outside dimensions 108(W)×165(D)×108(H) mm
Operating

temperature and
humidity

Storage temperature
and humidity

Reliability Print head life: 150 km, 200 million pulses (at normal temperature/humidity, using

Safety standard

Notes:
*1: The number of printable columns is selected using a memory switch.

The numbers of columns noted in this table refer to typical models. The number of columns varies
depending on specifications.

mm/384 dots, 45 mm/360 dots, Factory setting: 54 mm

—

Paper width
Font
Font A 36 12×24
Font B 48 9×24
Font C 54 8×16

*2 Font A:1.50×3.00 mm

Font B:1.13×3.00 mm
Font C:1.00×2.00 mm

WPC1252, katakana, ThaiCode 11/18 (1Pass/3Pass), TCVN-3

CODE93, PDF417, QR Code, GS1-DataBar

Paper thickness

Rated input: AC 100 to 240 V, 50/60 Hz, 150 VA
Rated output: DC 24 V, 2.1 A

5 to 45°C, 10 to 90% RH (no condensation)

-20 to 60°C, 10 to 90% RH (no condensation)

recommended paper and paper thickness)
Auto cutter life: 2 million cuts (full cut), 2 million cuts (partial cut) (at normal
temperature/humidity, using recommended paper and paper thickness)

*3 UL, C-UL, FCC Class A, TÜV-GS, CE Marking

: 53 -75 µm (paper tube inner diameter: 12 mm /outer diameter: 18 mm)

75-85 µm (core tube diameter: inner 25.4 mm/outer 32 mm)

Maximum number of characters

(columns)

54 mm

—11—

Dot configuration

(dots)

*2: Characters appear small because the dimensions include a blank area surrounding each character.

Paper cover

Cover open lever

POWER button

BEZEL LED (Blue)

Operation panel

FEED button

Rear connectors

*3: Compliant if the Citizen Systems AC adapter (36AD2/37AD5) is used.

2. EXPLANATION OF PRINTER PARTS

2.1 Printer Appearance

Names of parts

 Paper cover

Open to load paper.
Also open to clear a cutter error.

* The paper cover cannot be used for manual cutting.

Refer to 4.2 Clearing a Cutter Error

 Cover open lever

Use to open the paper cover.

 BEZEL LED (Blue)

Flashes while data is being received.
Settings can be configured so this LED lights or flashes by user command.

 POWER button

Hold down two or three seconds to turn power on or off.

—12—

 FEED button

Press this button to feed paper.
In case of a cutter lock, remove the cause of the lock, close the paper cover, and
then press the FEED button.
The printer enters the mode for setting memory switches and running self test.

Refer to 4.3 Self Test

Refer to 5.3 Manual Setting of Memory Switches

Operation panel

The operation panel has five LEDs and two buttons.

LED name Color Description

POWER LED Green Lights when the power is on, turns off when the power is off.

PAPER LED Green Lights or flashes when no paper or low paper is detected.

CUTTER LED Green Flashes when a cutter error is detected.

COVER LED Green Lights or flashes when an open paper cover is detected.

SERVICE LED Orange Flashes when an unrecoverable printer abnormality is

May also light or flash when other abnormalities are detected.

May also light or flash when other abnormalities are detected.

May also light or flash when other abnormalities are detected.

detected.

Refer to 4.5 Error Indications

—13—

Rear connectors

Interface connector

(serial, USB, etc.)

Cash drawer kick-out
connector

Power connector

 Interface connector (serial, parallel, USB, etc.)

Connects to the interface cable.

 Cash drawer kick-out connector

Connects to the cable from the cash drawer.

 Power connector

Connects to the AC adapter cable.

—14—

2.2 Inside the Paper Cover

Platen

Print head (thermal)

Auto cutter

Paper near-end (PNE) sensor
Button to change paper near-end sensor

Paper end (PE) sensor

 Platen

Feeds the paper.
Do not remove the platen except to do maintenance.

 Paper near-end (PNE) sensor

Detects when the paper is near the end of the roll. Adjust the position of the sensor
to determine when it detects the end of the paper is near.

 Button to change paper near-end sensor

Change the position of the paper near-end sensor to match the paper being used.

Refer to 3.8 Adjusting the Paper Near-end Sensor

 Auto cutter

Cuts the paper.

Refer to 5.3 Manual Setting of Memory Switches

 Print head (thermal)

Prints characters and graphic data on paper (paper rolls).

 Paper end (PE) sensor

Detects when there is no paper. Printing stops when this sensor detects there is
no paper.

—15—

2.3 Other Built-in Functions

CAUTION

 Buzzer

Buzzes when errors occur or when operations or command operations are
performed.

Refer to 4.5 Error Indications

 User memory

You can save user-defined logo and character data in this memory. Data remains
stored in this memory even if the printer is turned off. For information on how to
save data, refer to the Command Reference.

 Memory switch

Setting of various kinds of functions can be stored in memory. Settings remain
stored in the memory even if the printer is turned off.

 USB power supply OFF (When memory switch MSW6-3 is set to ON)

When the printer is connected to a PC by USB, turning off PC power or terminating
the USB connection causes printer USB power to turn off three seconds later.
This mode is canceled when the PC is turned back on or when a USB connection
is established.

 The POWER LED is unlit when USB power supply is OFF, and the power OFF state cannot

be identified.
Pressing the POWER button while USB power supply is OFF turns on power normally.



 Paper saving functions

Memory switches MSW8-3 through MSW8-4 can be used to configure the
settings below, which save paper.

•Top margin suppression
The printer back feeds the paper before printing which reduces the blank space
at the top edge of the paper.
The back feed amount can be specified.

•Line gap reduce
Automatically compresses the linefeed amount between lines. The compression
ratio can be specified.

—16—

CAUTION

 Before configuring the top margin suppression setting, first remove any partially cut paper

CAUTION

from the printer. Failure to do so can cause the cut paper to be torn off by the next print
operation, which can cause printer trouble.

 Auto side shift (MSW8-6)

This function dissipates heat load during frequent heat generation by a vertical
ruled line or other specific head heating element.
If no data is received within 15 seconds after each cut or print, the print position is
automatically slid N

* dots to the right. The original print position is returned to at

the next slide timing.

* N is the MSW8-6 setting value.

 If the right margin is too narrow, this may result in some print characters being cut off.
 This function is disabled under initial settings.
 To enable this function, use MSW8-6 to specify an appropriate value for the maximum slide

amount.

—17—

3. SETUP

CAUTION

Power connector

Cable connector

AC adapter

AC inlet

AC power cord

3.1 Connecting the AC Power Cord

1. Turn off the power.

2. Connect the power connector to the AC adapter cable connector. Next, connect the
AC power cord to the AC inlet, and insert the plug into an electric outlet.

 Use only the specified AC adapter.
 Always hold the AC adapter’s cable connector by the connector when removing or inserting

it.

 Use an AC power source that does not also supply power to equipment that generates

electromagnetic noise.

 Pulling on the AC power cord may damage it, cause a fire, electric shock, or break a wire.
 If a lightning storm is approaching, unplug the AC power cord from the electric outlet. A

lightning strike may cause a fire or electric shock.

 Keep the AC power cord away from heat generating appliances. The insulation on the AC

power cord may melt and cause a fire or electric shock.

 If the printer is not going to be used for a long time, unplug the AC power cord from the

electric outlet.

 Place the AC power cord so that people do not trip on it.

—18—

3.2 Connecting Interface Cables

CAUTION

CAUTION

Serial Bluetooth + USBUSB

Ethernet+USB

Wireless LAN + LAN

9-pin (female) - 9-pin (female) cable

PC Printer

Signal

Pin Pin

Signal

RXD 2 2 RXD
TXD 3 3 TXD
DTR 4 4 DTR
SG 5 5 SG
DSR 6 6 DSR
RTS 7 7 RTS
CTS 8 8 CTS

1. Turn off the power.

2. Orient the interface cable correctly and insert it into the interface connector.

 When disconnecting the cable, always hold the connector.
 Be careful not to insert the USB cable into the cash drawer kick-out connector.
 To connect more than one printer to a single computer by USB, you must change the serial

number of the USB interface.

 Hold the connector of the LAN cable perpendicular and straight when connecting or

disconnecting it. Doing it at an angle may cause the connector to misconnect.

Use a serial cable with the connection layout shown below.

Place the interface cable so people do not trip on it.

—19—

3.3 Bluetooth Interface Board

Status LED

Bluetooth status LED

The LED on the Bluetooth interface board on the rear of the printer indicates the
status below.

Status Description LED Status

Detection
standby
(Discoverable)

Connection
standby
(Connectable)

iOS connection Data session unopened

Standing by for
detection and
connection

Standing by for
connection

Communicating iOS: data session

Error Error or settings being

opened
Other OS: connection
established and
communication in
progress

configured

Unlit

Pairing operation

You need to perform the operations below the first time you establish a Bluetooth
connection for Bluetooth data communication.

A: Detect Bluetooth devices
B: Configure pairing settings

A: Detecting Bluetooth devices

Confirm that Bluetooth is enabled on the host PC before searching for Bluetooth
devices.
This product will show up as "CT-S251_XX"(XX is last 2 digits of unique BD address.)
when it is detected.
Select this product from among the detected devices.

Note: You can search for devices and change the names.

When memory switch MSW13-5 is set to "No Response," nothing is displayed by
device detection.
You can temporarily switch this setting to device detection (detect mode) by opening
the paper cover and holding down the FEED button for two seconds. Detect mode is
exited when the connection between the host PC is terminated.

—20—

B: Configuring pairing settings

CAUTION

CAUTION

Normally, selecting the printer during device detection will transition directly to
pairing settings.

Some host PC configurations and models may not transition directly to pairing settings after
the printer is selected during device detection.

The operation required to configure pairing settings depends on whether SSP (secure
simple pairing) is enabled on the host PC.
If SSP is enabled on the host PC, pairing can be achieved without additional
operations.
If SSP is disabled on the host PC, you will be prompted to input a passkey.
Input the passkey as described below.
Passkey Last four digits of the address on the self test printout
(Letters A through F are uppercase)

Example: If the address is 01:23:45:67:89:AB
the passkey is 89AB.

If you delete paring information from the host PC without deleting the corresponding
pairing information on the printer, the printer may not show up if you detect devices
again with the host PC.
To delete printer pairing information, open the paper cover and then hold down the
FEED button for five seconds.
Deleting pairing information on the printer will put the printer into discovery mode.

Auto reconnection

With iOS device Bluetooth communication, a connection between a paired iOS
device and the printer is not automatically restored after it is lost. However, when
auto reconnection is enabled, the printer tries to reconnect with an iOS device after
two-way communication is enabled and automatically restores the connection.

This function is enabled when shipped from the factory. (MSW13-6)
Auto reconnection can take some time to connect when the host is not an iOS device.

 Even if the partner device is an iOS device, the conditions below can interfere with the auto

reconnection function.

• When you want Bluetooth communication to cut off after printing is complete

• When there are multiple iOS devices printing on the same printer

Under such conditions, disable auto reconnection.

Enabling and disabling auto reconnect

During self test, open the cover, press the FEED button 3 times and close the cover

-> Auto reconnect = Valid

During self test, open the cover, press the FEED button 4 times and close the cover

-> Auto reconnect = Invalid

At the end of self test, new setting will be printed as Auto reconnect [Valid] or
[Invalid].

Refer to 4.3 Self Test

—21—

3.4 Ethernet (LAN) Interface Board

CAUTION

Panel button

This section provides an overview of the Ethernet (LAN) interface board. For details
about this board, refer to the separate manual.

Panel button operation

Board operations are performed using the panel button on the Ethernet board. You
can use the button to print setup information.

 Printing network setup information

Press the panel button.

 Returning to factory settings

Hold down the panel button. A buzzer* will sound and then hold down the panel
button again within 3 seconds. This returns network settings to its factory settings.

* Depending on settings, the buzzer may not sound.

 The board will automatically restart after this operation is complete.
 If settings are configured to obtain an IP address from a DHCP server automatically, the

new IP address may be different from the previous one.

—22—

LED Functions

1

2

The tables below explain how to interpret LED indications.

1. Network transmission speed

Transmission speed LED (green)

100Mbps Lit
10Mbps/Not connected Unlit

2. Network status

Status LED (yellow)

Connected Lit
Not connected Unlit
Data transmission in

progress

Flashing

Changing network settings

You can use a web browser to access a special settings page to check and change
board settings.

 Accessing the special settings page

1. Use a web browser to access the URL of the special settings page. Specify the IP
address assigned to the printer as the URL. (Example: For an IP address of

169.254.1.10, input: http://169.254.1.10.)

—23—

2. This displays the page to display the current status.

3. Click the "Edit" button to display the "Print Server Configuration" page shown
below.
For details about settings, refer to the separate manual.

—24—

3.5 Wireless LAN Interface Board

CAUTION

Panel button

This section provides an overview of the wireless LAN interface board. For details
about this board, refer to the separate manual.

Panel button operation

Board operations are performed using the panel button on the rear of the LAN board.

 Enabling wireless LAN connection

Turn on the printer. Operation of this board will start about 20 seconds later.

 Printing wireless LAN setup information

Press the panel button.

 Entering setting mode

Hold down the panel button. A buzzer* will sound once to indicate that setting
mode has been entered.

• You can use setting mode to read factory settings.

• If you do not perform any operation for three seconds while in setting mode, a buzzer* will
sound once to indicate the board has returned to normal mode.

* Depending on the printer model and settings, the buzzer may not sound.

 Returning to factory settings

Enter the board setting mode, and then hold down the panel button. This returns
the board to its factory settings.

 The board will automatically restart after this operation is complete. After clearing settings,

you will need to re-configure wireless LAN settings.

—25—

LED Functions

12

3

The tables below explain how to interpret LED indications.

1. Wired LAN transmission speed

Transmission speed LED (green)

100Mbps Lit
10Mbps/Not connected Unlit

2. Wired LAN connection/transmission status

Connection status LED (yellow)

Connected Lit
Not connected Unlit
Data transmission in

progress

Flashing

3. Wired/Wireless LAN status

Connection status LED (green) LED (red) Description

No printer connection Unlit — Board is not connected with a printer.
Printer

connection

Resource error Alternate flashing (1-second

System error Alternate flashing (0.2-second

No network
connection

Connected by
wired LAN

Wired LAN
operation

Connected by
wireless LAN

Wireless LAN
operation

Lit Unlit Board is connected with a printer.

Lit Flashing

Lit Lit Network operation being performed over

Flashing

(2-second cycle)

Flashing

(2-second cycle)

(1-second cycle)

Flashing

(1-second cycle)

cycle)

cycle)

Lit Network operation being performed over

Getting an IP address from the DHCP
server over wired LAN.

wired LAN.
Connecting to an access point or getting

an IP address from the DHCP server over
wireless LAN.

wireless LAN.
Board is unable to operate normally.

Board is unable to operate normally.

—26—

Web Manager

The wireless LAN interface board has a Web Manager function that can be used to
connect to the board with a web browser and change board settings.

Starting up Web Manager

1. Start up a web browser.

2. In the address field, input the board's IP address and then press [Enter].

HOME Screen

This is the Web manager home screen.

Here, press the [CONFIG] button.

—27—

CONFIG Screen

This will display the Login dialog box shown below. Log in as an administrator and
then configure wireless LAN interface board settings.

 User Name

Input a board administrator user name. (Initial setting: admin)

 Password

Input the administrator user password. (Initial setting: admin)

 [Login] button

After inputting an administrator user name and password, click the [Login] button.
This displays the setting screen.

For details about settings, refer to the separate manual.

—28—

3.6 Connecting the Cash Drawer

CAUTION

Cash drawer kick-

out connector

Cash drawer kick-out cable

connector

Cash

drawer kick-

out cable

connector

Cash

drawer

kick-out

connector

Ground wire

Screw
for
ground
wire

1. Turn off the power.

2. Confirm the orientation of the cash drawer kick-out cable connector and connect it
to the cash drawer kick-out connector at the back of the printer.

3. Remove the screw for the ground wire.

4. Screw the cash drawer’s ground wire to the body of the printer.

 Connect only the cash drawer kick-out cable connector to the cash drawer kick-out

connector. (Do not connect a telephone line.)

 Signals cannot be output from the cash drawer kick-out connector while printing.
 Hold the connector of the drawer kick cable perpendicular and straight when connecting or

disconnecting it. Doing it at an angle may cause the connector to misconnect.

—29—

(1) Connector pin configuration

CAUTION

Cash drawer kick-out connector

Cash drawer open/
close switch

Shielded

Cash drawer Printer

No. Signal Function

1 FG Frame ground Connector used:
2 DRAWER1 Cash drawer 1 drive signal
3 DRSW Cash drawer switch input
4 VDR Cash drawer drive power supply
5 DRAWER2 Cash drawer 2 drive signal
6 GND Signal ground (common ground on

circuits)

TM5RJ3-66 (Hirose) or
equivalent

Applicable connector:

TM3P-66P (Hirose) or
equivalent

(2) Electric characteristics

1) Drive voltage: 24 VDC

2) Drive current: Approx. 1 A max. (not to exceed 510 ms.)

3) DRSW signal: Signal levels: “L” = 0 to 0.5 V, “H” = 3 to 5 V

(3) DRSW signal

Status can be tested by commands.

(4) Drive circuit

 Cash drawers 1 and 2 cannot be operated at the same time.
 The solenoid used for the cash drawer should be 24  or more. Do not allow the electric

current to exceed 1 A. Excessive current could damage or burn out the circuits.

—30—

3.7 Precautions for Installing the Printer

CAUTION

Horizontal position Vertical position

This printer can only be positioned horizontally. It cannot be positioned vertically or
on a wall.

Do not use the printer under the following conditions.

 Avoid locations subject to vibration or instability.
 Locations that are very dirty or dusty.
 Avoid locations where the printer is not level.

• The printer may fall and cause an injury.

• The quality of printing may deteriorate.

 Oriented other than as specified.

• Malfunction, failure, or electric shock may result.

—31—

Note:

3.8 Adjusting the Paper Near-end Sensor

CAUTION

Paper near-end sensor

Change the settings of the paper near-end sensor to set the position at which the
near-end of the paper is detected.

1. Gently press the paper near-end sensor with your finger.

2. Keep the paper near-end sensor pressed as you move it left and right. The sensor
positions are shown below for the various diameters of the paper roll used.

(Unit: mm)

Sensor position

* Approximately 22.0 18/12

1

2 Approximately 25.2 18/12
3 Approximately 29.2 18/12
4 Approximately 34.0 18/12

*: Sensor position when shipped from the factory. However, factory settings differ depending on the

destination market.

Paper roll outer diameter when near-end is

detected

The diameter of the roll of paper that is detected is an estimate. Some variations may occur
depending on the paper.

Exterior/ interior diameter of core of

paper roll used

—32—

3.9 Loading Paper

CAUTION

1. Turn on the power.

2. Press up on the cover open lever to open the paper cover.

When pressing up on the lever, take care that you do not pinch your fingers in the gap above
the top of the lever.

3. Load the paper roll so that the printable side of the paper is facing up, as shown by
arrow A.

4. Pull a few cm of paper straight out in the direction of arrow B.

5. Close the paper cover until you hear a click. Paper is fed and cut automatically (by
the factory setting).

Refer to 5.3 Manual Setting of Memory Switches

—33—

CAUTION

 Always use the specified types of paper rolls.
 Confirm that the paper roll is set correctly.
 If the paper is skewed and not coming straight out of the paper cover, open it and

straighten the paper.

 Always pull a few cm of paper straight out of the printer if you open the paper cover while

paper is loaded.

 Press on the center of the paper cover to close it securely.
 Be careful of paper cuts while loading the paper.
 Do not touch the print head or auto cutter while the paper cover is open. Doing so may

cause a burn or cut.

3.10 Installing a Driver

Drivers are included on the CD-ROM that comes with the printer.
Install the driver required by your printer.
For information about driver installation, functions, and operations, see the
information provided on the CD-ROM for each driver.
Visit the site below to download the latest driver versions and information.

http://www.citizen-systems.co.jp/english/support/download/printer/driver/

3.11 Precautions for Creating Applications and Practical Operations

If printing is done immediately after the paper is partially cut and torn off, the top of
the next print out may be distorted.
We recommend advancing the paper one line after cutting before printing.

If you are using a serial interface that has a slow data transmission speed, streaks
may appear in the printouts when you are printing graphics or gradated text, which
require large amounts of data.

USB interfaces may be susceptible to the effects of electromagnetic interference
from the host or environment.
If this is the case, try using a cable with ferrite cores on both ends, which are very
effective at eliminating EMI.

—34—

4. MAINTENANCE AND TROUBLESHOOTING

CAUTION

Platen

Print head

4.1 Periodic Cleaning

A dirty print head or platen may reduce printing quality or cause malfunctions. We
recommend cleaning the printer periodically (every 2 to 3 months) as shown below.

1. Turn off the power.

2. Press up on the cover open button to open the paper cover.

3. Wait a few minutes until the print head cools.

4. Use a cotton swab dampened with ethyl alcohol to wipe off any dirt and dust that is
on the print head and platen.

 The print head is hot immediately after printing. Do not touch it.
 Do not touch the print head with bare hands or metal objects.

—35—

4.2 Clearing a Cutter Error

CAUTION

The CUTTER LED flashes, the PAPER LED and COVER LED light, and the auto cutter
blade remains extended because a foreign object or paper jam is obstructing it.
If a cutter error occurs, clear the locked cutter as described below.

1. Turn off printer power.

2. Open the paper cover.

3. Remove any jammed paper including any scraps of paper. (Remove the paper roll
that is loaded in the holder also.)

4. Reload the paper roll and close the paper cover.

5. Turn on the power.

 The print head is hot immediately after printing. Do not touch it.
 Do not touch the print head with bare hands or metal objects.

—36—

4.3 Self Test

Buffer size

Serial communication
conditions
(USB or serial interface
models only)

Interface

Firmware version

Memory
switch
setting

You can use self test to check for printer problems.

Performing a self test operation

1. While paper is loaded, press and hold the FEED button while turning the power on.

2. Hold the FEED button down for about one second until the buzzer sounds. Release
the button to start self test. The printer will print its model name, version, memory
switch settings, and built-in fonts.

—37—

4.4 Hexadecimal Dump Printing

CAUTION

Print received data in hexadecimal. If problems such as missing or duplicated data
occur, this function allows you to check whether or not the printer is receiving data
correctly.

How to do hexadecimal dump printing

1. Load paper.

2. While the paper cover is open, hold down the FEED button as you turn on printing
power. Keep FEED depressed until the POWER LED starts to flash, and then close the
paper cover.

3. The printer will print “HEX dump print mode” followed by the received data printed
in hexadecimal numbers and some characters.

How to stop hexadecimal dump printing

Do one of the following to stop printing.

 Press the FEED button three times in a row
 Turn off the power
 Receive a reset command from an interface

 The printer prints “.” if there is no character corresponding to the data.
 None of the commands function during hexadecimal dump printing.
 If print data does not cover a complete line, press the FEED button to advance the paper.

Print example
HEX dump print mode

61 62 63 64 65 66 67 0A 0D 0D 0D 0D abcdefg.....

0D 0D 0D .....

—38—

4.5 Error Indications

 Paper end, paper near-end

The end of the roll of paper is detected at two stages, paper near-end and paper­end.
When paper near-end is detected, the PAPER LED flashes. Prepare a new paper
roll.
When paper end is detected, the PAPER LED lights and the buzzer sounds. Load
a new paper roll. Memory switch settings can be used to disable the buzzer.

 Cover open

When the cover is open, the COVER LED lights and the buzzer sounds.
Memory switch settings can be used to disable the buzzer.
Do not open the paper cover during printing. If the paper cover is opened by
mistake, the COVER LED lights or flashes. Check the paper and pull a few cm of
paper straight out of the printer before closing the cover. Printing resumes.
Sending a command to resume printing may be required depending on the
memory switch setting.

 Cutter locked

If the auto cutter cannot move because of a paper jam or something else, the
CUTTER LED flashes. Remove the cause of the trouble and press the FEED
button. If the auto cutter still does not operate and the paper cover does not open,
refer to “4.2 Clearing a Cutter Error”.

Refer to 4.2 Clearing a Cutter Error

 Print head hot

When you print dense characters, dark images, or for an extended time in a hot
environment, the print head temperature increases. If the print head exceeds a
specified temperature, the printer stops printing and waits for the print head to
cool. When this happens, the PAPER LED, CUTTER LED, and COVER LED flash.
Printing resumes automatically when the print head cools.

—39—

The status display for various messages is shown below.

Status PAPER LED CUTTER LED COVER LED

Paper near-end Unlit Unlit Unlit —

Paper-end Lit Unlit Unlit Unlit Yes
Cover open*3 Unlit Unlit Lit Unlit Yes*2
Cover open II*4 Unlit Unlit Unlit Yes

Cutter locked Unlit Unlit Unlit Yes

Low-voltage error Unlit Yes

Low-voltage error II Unlit Unlit Unlit Yes

High-voltage error Unlit Unlit Unlit Yes

System error Unlit Unlit Unlit Yes

Memory error Unlit Unlit Unlit Yes

Print head hot Unlit —

Waiting for macro to
execute

Notes:
*1: Buzzer sounds when MSW5-1 (buzzer setting) is set to ON.
*2: MSW10-5 (buzzer event) can be configured to disable the buzzer.
*3: Indicated when a cover is opened during standby.
*4: Indicated when a cover is opened during standby.

SERVICE LED Buzzer

Unlit —

*1

*2

—40—

4.6 Paper Jams

CAUTION

Take care to avoid obstruction of the paper outlet and paper jamming around the
outlet during printing.
If paper cannot get out of the printer, it can roll up on the platen inside the printer and
cause an error.
If the paper wraps around the platen, open the paper cover and carefully pull the
paper out.

4.7 Serial Interface Operation Precautions

While using the serial interface, certain printing conditions can cause white stripes in
printouts and feed failure. To avoid these problems, change memory switch settings
as described below.

1. Change MSW7-1 (serial baud rate) to a faster baud rate setting.

2. Change MSW10-2 (print speed) to a lower level.

Depending on the serial interface transmission speed, ambient temperature, print data duty,
and other factors, changing the above settings may not eliminate the problems.

—41—

5. OTHER

108

165108

5.1 External Views and Dimensions

(Unit: mm)

—42—

5.2 Printing Paper

CAUTION

 

Printable side

83 or less

Paper width 58

+0

-1

Paper thickness

(mm)

53 to 75 75 to 85

Core inner

diameter d

(mm)

12 25.4

Core outer
diameter D

(mm)

18 32

Maximum print

width 54

(Initial setting)

Use the paper shown in the following table or paper of the same quality.

Paper type Product name

Recommended
thermal roll paper

TF50KS-E2D, TF50KS-E or TF60KS-E from Nippon Paper
PD150R or PD160R from Ohji Paper
P220AG, HP220A, HP220AB-1, or P220AB from Mitsubishi Paper

(Unit: mm)

Use thermal paper that is wound as follows:

 Not creased and fits tight to the core.
 Not folded.
 Not glued to the core.
 Rolled with the printable side out.

—43—

5.3 Manual Setting of Memory Switches

Current memory switch

Current setting

Memory switch function

Current setting

Memory switches are used to set various printer settings. Memory switches can be
set manually, or by utilities or commands. This section explains how to perform
manual settings.
For information on how to set the memory switches using commands, please refer
to the Command Reference.

Individual setting mode

Set the memory switches individually.
Do the settings while confirming the memory switch function and settings on the
printout.

1. Load paper.

2. While the paper cover is open, press and hold the FEED button while turning the
power on.

3. Press the FEED button twice and close the paper cover.

The printer enters the mode for setting memory switches individually.
The printer prints “Memory SW (1)” and the current setting, 0 (off) or 1 (on).
(The current settings for memory switches 7 to 13 are not printed.)

4. Press the FEED button.

Each press of the FEED button cycles through the list of memory switches in the following
sequence: “Memory SW (1)” > “Memory SW (2)” > ...“Memory SW (11)” or “Memory
SW (13)” > “Save To Memory” > “Memory SW (1)”.
Press the FEED button until the number for the memory switch you want to change is
printed.

5. Press the FEED button for at least two seconds.

A setting for the memory switch is printed, through the cycle, each time the FEED button
is pressed for at least two seconds.
Press the FEED button for at least two seconds to cycle through the list until the function
of the memory switch you want to change is printed.

—44—

6. Press the FEED button.

A setting is printed each time the FEED button is pressed in order through the cycle.
When the current settings are printed, the COVER LED lights.
Press the FEED button until the setting you want is printed.

7. Press the FEED button for at least two seconds.

The selected settings are set.
The next memory switch function and settings are printed.

8. Repeat steps 5 to 7 to change different functions for the current memory switch
number.

9. Open the paper cover and close it.

The changed memory switch settings are printed.

10. Repeat steps 4 to 9 to change functions for a different memory switch number.

11. Press the FEED button until “Save To Memory” is printed.

12. Press the FEED button for at least two seconds.

The changed memory switch settings are saved and a list of them is printed.
The printer exits individual setting mode when printing is finished.

Memory switch initialization

Set all the memory switches to the factory settings.

1. Do steps 1 through 3 of the procedure to enter individual setting mode.

2. Press the FEED button until “Save To Memory” is printed.

3. Open the paper cover.

4. Press the FEED button for at least two seconds.

All memory switches change to the factory settings.

5. Close the paper cover.

—45—

The function of each memory switch is shown in the following table. (Shaded values
are factory settings.)

Switch no. Function OFF ON

MSW1-1 Power ON Info
MSW1-2 Buffer Size
MSW1-3 Busy Condition
MSW1-4 Receive Error
MSW1-5 CR Mode
MSW1-6 Reserved
MSW1-7 DSR Signal
MSW1-8 Init Signal

Va li d Not Send

4K bytes 45 bytes

Full/Err Full

Print“?” No Print

Ignored LF

Fixed —
Invalid Valid
Invalid Valid

MSW2-1 Reserved —
MSW2-2 Auto Cutter Invalid

* MSW2-3 Spool Print Invalid Valid

MSW2-4 Full Col Print LineFeed
MSW2-5 Resume aft PE
MSW2-6 Reserved

MSW2-7 Reserved
MSW2-8 PNE Sensor

MSW3-1 Resume Cttr Err
MSW3-2 PE signal by PNE Valid
MSW3-3 Reserved

MSW3-4 Reserved
MSW3-5 Reserved
MSW3-6 Reserved
MSW3-7 CBM1000 Mode

MSW3-8 Resume Open Err

MSW4-1 Reserved
MSW4-2 Reserved
MSW4-3 Feed&Cut at TOF Invalid
MSW4-4 Reserved
MSW4-5 Reserved
MSW4-6 Reserved
MSW4-7 Reserved
MSW4-8 Partial Only Invalid

MSW5-1 Buzzer
MSW5-2 Line Pitch
MSW5-3 USB Mode Virtual COM
MSW5-4 Reserved

MSW5-5 GradationQuality

MSW5-6 Reserved

MSW5-7 Reserved

MSW5-8 Reserved

Next To p
Fixed —
Fixed —
Va li d Invalid

Va li d Invalid

Fixed —
Fixed —
Fixed —
Fixed —

Invalid Valid

Close Command

Fixed —
Fixed —

Fixed —
Fixed —
Fixed —
Fixed —

Va li d Invalid
1/360 1/406

Fixed —

Quality Speed

Fixed —
Fixed —
Fixed —

Fixed

Valid

WaitData

Invalid

Valid

Valid

Printer Class

MSW6-1 Act. For Driver

Invalid Valid

—46—

Switch no. Function OFF ON

MSW6-2 Character Space Invalid Valid
MSW6-3 USB Power Save Invalid
MSW6-4 Reserved
MSW6-5 Reserved
MSW6-6 Reserved
MSW6-7 Reserved
MSW6-8 Reserved

Switch no. Function Initial setting Setting value

MSW7-1 Baud Rate

MSW7-2 Data Length
MSW7-3 Stop Bit
MSW7-4 Parity
MSW7-5 Flow Control
MSW7-6 DMA Control
MSW7-7 VCom Protocol

9600 bps 1200 bps, 2400 bps, 4800 bps, 9600 bps,

8bits 7bits, 8bits

1bit 1bit, 2bits

NONE NONE, ODD, EVEN

DTR/DSR DTR/DSR, XON/XOFF

Valid Valid, Invalid

PC Setting PC Setting, DTR/DSR, XON/XOFF

19200 bps, 38400 bps, 57600 bps, 115200 bps

Fixed —
Fixed —
Fixed —
Fixed —
Fixed —

Valid

MSW8-1 Print Width

MSW8-3 Top Margin
MSW8-4 Line Gap Reduce
MSW8-5 Reduced Char V/H

MSW8-6 Auto Side Shift

MSW8-7 Liner Free Mode

MSW9-1 Code Page

MSW9-2 Int’Char Set

MSW9-3 Kanji
MSW9-4 JIS/Shift JIS

MSW10-1 Print Density

MSW10-2 Print Speed

MSW10-4 Old Command
MSW10-5 Buzzer Event

MSW10-6 Buzzer Sound

432dots 436dots, 432dots, 420dots, 390dots, 384dots,

11mm 6mm, 7mm, 8mm, 9mm, 10mm, 11mm

Invalid Invalid, 3/4, 2/3, 1/2, 1/3, 1/4, 1/5, ALL

100% / 100% 100% / 100%, 75% / 100%, 50% / 100%,

Invalid Invalid, 1 dot, 2 dots, 3 dots, 4 dots, 5 dots, 6 dots,

Invalid Invalid, 1h, 6h, 12h, 18h, 24h, 5m, 10m, 15m, 20m,

PC437 PC 437, Katakana, PC 850, PC 858, PC 860, PC 863,

USA USA, France, Germany, England, Denmark, Sweden,

OFF ON, OFF

JIS JIS, Shift JIS (PC932), Shift JIS (x0213)

100 % 70 %, 75 %, 80 %, 85 %, 90 %, 95 %, 100 %,

Level 9 Level 1, Level 2, Level 3, Level 4, Level 5, Level 6,

Invalid Invalid, CBM1, CBM2

All Event/

Error

To ne 2 Tone 1, Tone 2, Tone 3, Tone 4

360dots

100% / 75%, 75% / 75%, 50% / 75%

7 dots

30m

PC 865, PC 852, PC 866, PC 857, WPC1252, Space
page, PC 864, ThaiCode11 1Pass, ThaiCode11
3Pass, ThaiCode18 1Pass, ThaiCode18 3Pass,
TCVN-3

Italy, Spain, Japan, Norway, Denmark 2, Spain 2,
Latin America, Korea, Croatia, China, Vietnam

105 %, 110 %, 115 %, 120 %, 125 %, 130 %,
135 %, 140 %

Level 7, Level 8, Level 9

All Event/Error, Not by C.Open, Not by C.Open/PE

MSW11-1 Bezel LED

Blink by Recv Off, On, Blink, Blink by Recv

—47—

Note:

Switch no. Function Initial setting Setting value

MSW13-1 Security/Target

MSW13-5 BT Device Scan
MSW13-6 Auto Reconnect

*: If print data is very dense, the print head is hot, data transmission is slow, or some other conditions, the

motor and printing may occasionally stop which causes white stripes in the printout. To print high-density
data, set MSW2-3 (Spool Print) to ON to reduce striping, although this increases the time before printing
starts.
For a serial interface, increase the transmission speed to prevent the motor from stopping.

Low/All Low/All, Mid/All, Mid/Paired only, Hi/All, Hi/Paired

Discoverable No Response, Discoverable

Valid Invalid, Valid

only

—48—

CT-S251_UM_103EN

A93403E-1508

October 2015