Citizen iDP-3210 User manual

Rev. Issued
0.01 May 7, 1997
Japan CBM Corporation
Information Systems Div.
Service Manual
Model : iDP-3210

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Preface
This manual, which describes the operational principles and procedures for maintenance,
is to be read by service personnel.
Features
This printer, a small-sized line thermal printer, has been developed to be applicable with various
data communication terminals, POS terminals, kitchen printers, etc..
Since it is equipped with many abundant functions, it can be used widely in various applications.
(1) Light weight and small foot print.
(2) Easy paper loading due to auto loading function.
(3) Easy maintenance and cleaning of print head due to the removable platen design.
(4) High speed printing and quiet printing due to Line thermal printing .
(5) High reliability due to long life of printer head and simple design.
(6) Input buffer incorporated.
(7) Bar code printing is available. (Exclusive command)
(8) Drawer kick-out interface incorporated.
(9) Equipped with an auto cutter.

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CONTENTS
Preface.............................................................................................................................................................................2
Features ...........................................................................................................................................................................2
Chapter 1 Handling and Maintenance of Printer............................................................................................................5
Chapter 2 Specifications and Operation Principle..........................................................................................................5
2-1 General Specifications ..........................................................................................................................................5
2.2 Mechanism and Operational Principle .............................................................................................................6
2.2.1 Power Transmission and Paper Feed Mechanism.........................................................................................6
2.2.2 Platen Attaching/Removing Mechanism.......................................................................................................6
2.2.3 Sensor Mechanism ........................................................................................................................................7
2.2.4 Print Head Mechanism..................................................................................................................................8
Chapter 3 Dismantling and Assembling.......................................................................................................................10
3.1 Procedure for Dismantling ..................................................................................................................................10
3.1.1 Remove the printer cover. ............................................................................................................................10
3.1.2 Remove the upper cover...............................................................................................................................10
3.2 Procedure for Assembling...................................................................................................................................14
Chapter 4 Circuit Diagram...........................................................................................................................................16
Circuit Diagram iDP-3210-RF..................................................................................................................................16
Circuit Diagram iDP-3210-PF...................................................................................................................................17
Chapter 5 Trouble-Shooting.........................................................................................................................................20
5.1 Procedure for Repair ...........................................................................................................................................20
Exploded View IDP-3210 1.........................................................................................................................................25
Exploded View IDP-3210 2........................................................................................................................................26
Appendix 1. Outer Drawing of Printer..........................................................................................................................36
Appendix 2. Outer Drawing of AC Adapter Model : 30AD.......................................................................................37
Appendix 3. ACS-130 Service Manual.........................................................................................................................38
*For Auto Paper Cutter ACS-130, please see attached service manual for ACS-130.

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Chapter 1
Handling and Maintenance of Printer
Chapter 2
Specifications and Operational principle

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Chapter 1 Handling and Maintenance of Printer
Please refer to “Item 2 Prior to use”and “Item 3 In using”described in the User’s manual contained
in printer package.
Chapter 2 Specifications and Operation Principle
2-1 General Specifications
ITEM DESCRIPTION
Printing system Line thermal dot printing system
Print width 73.92 mm/448 dots
Dot pitch Horizontal 0.165mm (approx. 6 dots/mm)
Vertical 0.163mm (1/156 inch)
Printing speed 73.3mm/sec. (Max, Print Density = Dark) (450 dot line/sec)
No. of printed digits 44 columns (10 x 16 dots)or 42 columns (10 x 16 dots)
(can be selected by dip switch.)
Character size 1.485mm x 2.61mm (9 x 16 dots)
Character type Alphanumeric, International characters
Bar code type UPA-A/E, JAN(EAN) 13 columns/18 columns, ITF
CODE 39, CODE 128, CODABAR
Line-line distance 1/6 inch (approx. 4.23mm) (can be selected by dip switch.)
Paper Thermal roll paper 80mm x Ø83mm (See Paper Spec..)
Interface Serial (RS-232C), Parallel (Conforms Centronics.)
Input buffer 4K byte
Spec. of power supply unit Rated input : AC100V - 240V, 50/60HZ, 112VA
Rated output : DC24V, 2.0A
Weight Main unit : 1300 g, Power supply unit : 450 g
External dimensions (main body) 152(W) X201(D) X123(H)
Operating temperature/humidity 5 - 40°C, 35 - 85%RH (free of dew condensation)
Storage temperature/humidity - 20 - 60°C, 10 - 90%RH (free of dew condensation)
Reliability Print head’s life : Pulse resistance 50 million pulses
Wear resistance 100 Km
(Printing ratio 12.5%, normal temperature,
normal humidity, recommended paper)
Auto cutter’s life : 500,000 cut (Normal temperature,
normal humidity, recommended paper)
*PRINTING PAPER SPECIFICATION (RECOMMENDED PAPER)
Type :Thermal paper
Paper width :80 ± 1mm
Paper thickness :65 ± 5 Micro m
Roll diameter :Ø83mm or less
Print surface :Outside of the roll (surface)
Recommended paper :Japan Paper Mill. TF50KS-E2C or equivalent
Core :Ø12mm (inner diameter), Ø18mm (outer diameter)
Remarks : Do not use the paper roll if its end is pasted to the core of roll.

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2.2 Mechanism and Operational Principle
The basic construction and operational principle of the printer are divided into the following blocks for explanation.
* Power Transmission and Paper Feed Mechanism.
* Sensor Mechanism.
* Print Head Mechanism.
2.2.1 Power Transmission and Paper Feed Mechanism.
The drive force of the motor as power is transmitted from the motor gear fixed to the motor shaft to the platen
roller through the platen gear. The platen gear rotates by this driving force.
The platen roller is pressed to the surface of the heating element of the thermal head by the force
of bar-shaped springs connected to both the ends of the roller. When paper is inserted between the platen roller
and thermal head, it is caught between the roller and the head by the rotation of the roller,
and transferred to the paper outlet being linked with the rotation of the platen roller.
2.2.2 Platen Attaching/Removing Mechanism
The platen roller of the printer, part of the paper feed mechanism, is constructed in a way that allows attaching
and removing. The platen roller block is composed of a platen roller, platen gear, platen bushes, and platen guides.
Setting this block on to the U-supports of the chassis, the platen gear engages with the motor gear.
Further, the platen block has come in contact with the thermal head by means of the platen bushes being pressed
by bar-formed springs one end of which is fixed to the chassis.
The platen roller can be attached/removed by hooking/undoing each movable end of the springs to the hook on
the metal fitting on the chassis.

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2.2.3 Sensor Mechanism
(1) Paper Sensor
The paper sensor detects the presence/absence of paper
in front of the thermal head. Activation of the thermal
head when paper is not inserted could cause damage or shorten
the life of the head significantly. This sensor is used
to prevent such trouble and for detection of the
presence/absence of paper in the automatic
loading mode.
(The paper sensor is built in the thermal head.)
(2) Paper Near-End Sensor
The paper near-end sensor detects that the remaining paper is low.
The reduced outside diameter of the paper roll (corresponding to approximately 50 cm to 2 m in length of
normal paper) is detected by a sensor provided on the chassis near one end of the paper roll.
The remainder of paper differs depending on paper thickness and core material.
This remainder can not be adjusted.

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2.2.4 Print Head Mechanism
A thermal head is used for this printer. The head is composed of the heating element and the head drive
for the drive and control of the element.
(1) Outline of Drive and Control
Serial print data input from DATA IN(D1) are transmitted to
the shift resistor in synchronization with CLOCK(CP),
and stored in the latch resistor by LATCH(LA) signal.
When the gate is closed by the head activation signal
(Print commands STR 1-3), the heating elements
corresponding to the stored print data are activated,
and the data are printed on paper by heat.
(2) Print Data and Print Position
Print data Nos. 1 to 448 of the 448 bits transferred by DATA IN(D1)
are printed on positions shown in the
following figure.
Circuit Diagram of Thermal Head

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Chapter 3
Disassembling / Assembling

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Chapter 3 Dismantling and Assembling
For maintenance, pay attention to the following matters.
Caution
(1) If printer performs well, do not dismantle, reassemble, nor adjust the printer without reasons.
(2) Upon the completion of an inspection, be sure to check the printer again for abnormality before turning on the
power.
(3) Never print without paper inserted into the printer.
(4) Confirm that paper and the platen roller are set normally.
(5) Be careful not to leave parts, screws, or the like used for maintenance work in the printer.
(6) When handling the thermal head, do not use gloves that easily generate static electricity.
(7) In dismantling and assembling the printer, check cords and circuit boards and the like for flaws,
and be sure not to pass nor fix them forcibly.
3.1 Procedure for Dismantling
3.1.1 Remove the printer cover.
(1) Open the printer cover.
(2) Remove the hinge on the one side
with it bent to the inside.
(3) Remove the other hinge.
3.1.2 Remove the upper cover.
(1) Remove the head SP, and remove the platen roller.
(2) Unfasten two M3 x 8 screws.
(3) Lift the aft part of the cover up to remove it.
Then, insert a (-) screw driver or the like to the clearance
between the case and chassis at the locations shown
by arrow marks (1) and (2) on the front side to
remove the hooks that secures the case to the chassis
(4) If the printer is provided with an optional black
mark sensor or paper holder, pull out the connector for
connection with the control circuit board.
(5)Lift up and remove the cover paying attention
to the head SP.

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lRemove the black mark sensor (option) from the upper cover.
(1) Remove the upper cover.
(2) Bend the claw on the reverse side of the upper cover shown by an arrow mark to remove the edge of
the circuit board on the cable side,
(3) Remove the cable from the upper cover.
(4) When removing the circuit board, be careful not to damage the two projections of the case that hold
the edge of the circuit board.
lRemove the roller from the upper cover
(1) Bend one of the roller shaft fixing blocks to the outside as sown by arrow marks to remove the roller shaft.
lDismantle the platen roller.
(1) Remove the E ring on the platen gear side.
(2) Remove the platen gear and platen bushes. (In reassembling, set the notch on the circumference of
the platen bush to the projection on the side of the paper guide.
(3) Remove the E ring on the opposite side, and remove the platen bushes.
(4)Remove the end of the platen roller (the side opposite to that with a D-cut) from the paper guide.

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5. Remove the bottom plate from the chassis.
(1) Unfasten two M3 x 8 screws.
(2) Slide the bottom plate slightly in the direction
of the arrow mark (1) to remove the power supply
connector from the housing.
(3) Turn and lift the connector side up to remove
the connection with the chassis.
6. Remove the auto-cutter ACS-131.
(1) Remove the bottom plate.
(2) Remove the upper cover.
(3) Remove the connector connected with the
control board.
(4) Unfasten two M2.6 x 6 screws to lift up and
remove the auto-cutter.
7. Remove the control board from the chassis.
(1) Remove the bottom plate.
(2) Remove the upper cover.
(For models not provided with the optional black
mark sensor and paper holder, remove the
platen roller only, since it is not required
to remove the upper cover.)
(3) Undo two M3 x 16 screws and two M3 x 8 screws.
(4) Lift up vertically and remove the board paying
attention not to deform nor damage the thermal head,
paper near-end sensor, power supply switch,
and others in particular.

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lRemove the thermal head from the control board.
(1) Insert a (-) screwdriver between the heat sink of the thermal head and the head BK (at one end of the arrow mark)
to lift the head slightly so that it may float a little from the connector.
(2) Lift the other end of the head slightly in the same manner so that it may float a little from the connector.
(3) Lift the thermal head vertically paying attention not to touch the heating element, and remove the head
from the connector.
Reference: If the upper cover is removed and the above sub items (1) to (3) are carried out, the thermal head
can be removed without removing the control circuit board.
8. Remove the motor from the chassis.
(1) Remove the upper cover.
(2) Remove the control board.
(3) Remove the cable from the chassis,
and unfasten two M3 x 5 screws.
9. Remove the head SP from the chassis.
(1) Remove the upper cover.
(2) Turn the head SP until it becomes vertical, and then, lower
it downward as it is.

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3.2 Procedure for Assembling
For assembling, mount each part according to the procedures shown in the article 3.1, "Procedure for Dismantling"
in the opposite order.

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Chapter 4
Circuit diagram

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Chapter 4 Circuit Diagram
Circuit Diagram iDP-3210-RF
D/N. 3210-08

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Circuit Diagram iDP-3210-PF
D/N.3210-05

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Block Diagram

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Chapter 5
Trouble Shooting

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Chapter 5 Trouble-Shooting
5.1 Procedure for Repair
If a failure occurs, observe the cause of the failure carefully,
locate the point of the failure, and repair it following the prescribed procedures.
lProblem : Seek the cause of the failure from items in this column.
If the problem falls into plural items, check all the matters in such items.
By so doing, hidden causes of the failure may be located.
lCause : Possible causes are listed as many as possible. Assume possible causes, and specify the cause
by methods shown in the next column.
lCheck Method : Check methods for specifying failures are mentioned.
lRepair Method : Repair the failure according to methods mentioned in the following column.
Following the above-mentioned procedure assures effective trouble-shooting with little misjudgment.
5.2 Guide to repair
Phenomenon Cause Check method Repair method
Poor print Poor power supply. Check if specified AC Use specified AC adapter.
adapter is used.
No print or print Poor installation and Check condition of Connect thermal head
result is not clear connection of thermal head installation and connection to control board correctly.
of thermal head and
control board.
Poor installation of control Check installation of Install control board
board. control board. correctly.
Poor installation of platen Check condition of Install platen roller
roller. installation of platen roller. correctly. Replace
Check head SP for deformed thermal head
deformation and bent. unit.
Defect of thermal head ------------- Replace thermal head
unit. unit.
Missing dot Foreign matters are Check head for foreign Wipe foreign matter off
deposed on thermal head. matters stuck on it. with a cotton or soft cloth
soaked in ethyl alcohol.
Defect of thermal head ------------- Replace thermal head unit.
unit.
Print result is very Poor power supply. Check if specified AC Use specified AC adapter.
dirty. adapter is used.
Dirt is stuck on thermal Check thermal head for Wipe foreign matter off
head. stuck dirt. with a cotton or soft cloth
soaked in ethyl alcohol.
Poor print quality Poor paper. Confirm that the paper Use paper to meet
meets specifications is used. specifications.