Epson EU-T432 Technical Manual
Confidential
Technical manual
Thermal printer unit
EU-T432
English
4013753
Issued Date
200 , ,
Issued by
Rev. A i
Confidential
EU-T432 Technical Manual
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Cautions
❏ Should any discrepancy exist between the contents of this document and the provisions of the "Master Contract"
or "Specifications," the latter shall take precedence over the former.
❏ We shall not be responsible for any troubles that might occur from the application of this document by customer
either to a machine other than this product, or to a drive circuit or other device that is the industrial property of a
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for damages, loss es, c osts, or expe nses i ncu rred by the purcha se s or thi rd par ties as a resu lt of: acci dent, m isus e, or
abuse of this product or unauthoriz ed modifi cation s, repairs , or a lterations to th is product , or (excludin g the U. S.)
failure to strictly comply with Seiko Epson Corporation’s operating and maintenance instructions.
❏ Seiko Epson Corporation shall not be liable against any damages or problems arising from the use of any options
or any consumable products other than those designated as Original EPSON Products or EPSON Approved
Products by Seiko Epson Corporation.
ii Rev. A
Confidential
Trademarks
EPSON® is a registered trademark of Seiko Epson Corporation.
General Notice: Other product and company names used herein are for identification purposes only and may be
trademarks of their respective companies.
Points That Must Be Observed
To Assure Product Safety
To assure the safe operation of this product, carefully observe the specifications as well as the notes provided below.
Seiko Epson Corporation will not bear any responsibility for any damage or injuries arising from use of this product
that is not in accordance with the specifications and the notes provided below.
Notes on Head Control
❏ The conditions setting forth the maximum time power can be applied (and the maximum voltage that can be
applied) to electronic components such as the head, motor, and magnets must be observed.
If the maximum time power can be applied (or the maximum voltage that can be applied) is exceeded, the components
mentioned above could overheat and start a fire or beg i n to smoke.
❏ Always include protective circuitry governing the length of time power is applied and the amount of current that
is applied when designing the drive and control circuits for the head, motor, magnets, etc.
If protective circuitry is not included, misoperation of the printer control circuits could cause the comp onents mentioned
above to overheat and begin to smoke or burn.
Notes on Handling
❏ The case must be designed so that movable parts, such as gears, are not exposed.
Touching moving parts could cause a laceration or other injury.
Rev. A iii
Confidential
EU-T432 Technical Manual
About This Manual
This manual consists of the following chapters.
Symbols
Notes in this manual are identified by their level of importance, as defined below.
CAUTION:
Observe cautions to avoid minor injury to yourself, damage to your equipment, or loss of
data.
Note:
Notes have important information and useful tips on the operation of your equipment.
Chapter 1
Features and Specifications
This chapter contains features and general specifications for
the EU-T432.
Chapter 2
Operation Principle
This chapter contains the outline and principles of
mechanisms.
Chapter 3
Handling
This chapter contains precauti ons on handling, pa per loading
and unloading and removing jammed paper.
Chapter 4
Maintenance
This chapter contains information on cleaning, inspection,
lubrication, and tools.
Chapter 5
Repair
This chapter contains repair levels, repair procedures, and
troubleshooting.
Chapter 6
Assembly and Disassembly
This chapter contains assembly and disassembly for the unit s
and modules of the EU-T432.
Appendix
The appendix contains the exploded and adhesive diagrams
of the EU-T432.
iv Rev. A
Confidential
Contents
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Chapter 1
Features and Specifications
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
System Configuration and Module Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Module Combinations and Specifications: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Chapter 2
Operation Principles
Outline of Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Paper Roll Supply Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Paper Holding Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Paper Load-absorbing Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Paper NE Detector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Printer Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Drive Force Transmission Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Paper Feed Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Printing Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Paper Guide Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Detector Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Autocutter Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Cut Sheet Presenter Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Paper Carrying Operation (With a Loop) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Paper Carrying Operation (Without a Loop) . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Detector Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Control Circuit Board Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Memory Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Chapter 3
Handling
Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Transport Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Carrying Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Installation Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Handling Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Storage Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Opening and Closing Modules, Unit and Part . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Paper Roll Supply Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Platen Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Cut Sheet Presenter Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Paper guide, upper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Loading and Removing Paper roll . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Loading a Paper roll . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Removing Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Removing Jammed Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
Removing Jammed Paper From the Cut Sheet Presenter Module . . . . . . . . . 3-9
Removing Jammed Paper From the Printer Module . . . . . . . . . . . . . . . . . . . . 3-10
Paper NE Detector Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10
Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Performing the Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Self Test End . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Rev. A v
Confidential
EU-T432 Technical Manual
LED Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
POWER LED (Power Supply Error): Green . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
PAPER LED (Paper-End Error): Red . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
ERROR LED (Error): Red . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Chapter 4
Maintenance
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Thermal Head Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Removing Stains (Except for the Thermal Head) . . . . . . . . . . . . . . . . . . . . . . . 4-2
Removing Dirt and Dust . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Removing Foreign Matter When the Cutter Locks . . . . . . . . . . . . . . . . . . . . . . 4-2
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Daily Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Periodic Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Lubricant . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Lubrication Standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Lubrication Point . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Lubricant List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Chapter 5
Repair
Repair Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Repair Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Chapter 6
Assembly and Disassembly
Small Parts Abbreviation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
Installation of the Printer Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-3
Pre-assembly A: Paper guide,straight, back unit . . . . . . . . . . . . . . . . . . . 6-3
Pre-assembly B: Frame, platen, straight unit, B . . . . . . . . . . . . . . . . . . . . 6-4
Pre-assembly C: Cutter motor assembly . . . . . . . . . . . . . . . . . . . . . . . . . . 6-7
Pre-assembly D: Cutter, cover sub-unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-8
Pre-assembly E: Cutter unit, B . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-11
Pre-assembly F: Black mark detector sub-assembly (option) . . . . . . . . . 6-13
Main Assembly A: Motor, paper feed, receipt, B and Platen detector . 6-14
Main Assembly B: Paper guide, straight, front and Paper guide, straight, back unit
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-16
Main Assembly C: Frame, platen, straight unit . . . . . . . . . . . . . . . . . . . . 6-18
Main Assembly D: Thermal print head assembly. . . . . . . . . . . . . . . . . . . 6-20
Main Assembly E: Plate, pressure spring. . . . . . . . . . . . . . . . . . . . . . . . . . 6-21
Main Assembly F: Fixing plate, the Gear, reduction and Gear, idler . . 6-23
Main Assembly G: Cutter unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-24
Assembly H: Arranging the lead wires . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-25
Main Assembly I: Cable, printer and Cable, head . . . . . . . . . . . . . . . . . . 6-26
Assembly J: Black mark detector Adjustment . . . . . . . . . . . . . . . . . . . . . . 6-27
Main Assembly K: Cover, cable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28
Main Assembly L: Cover, gear . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-29
vi Rev. A
Confidential
Installation of the Other Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-30
Pre-assembly A: Frame, paper supply assembly . . . . . . . . . . . . . . . . . . . . 6-30
Pre-assembly B: Roll paper holder unit . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-34
Pre-assembly C: Roll paper supply module . . . . . . . . . . . . . . . . . . . . . . . . 6-39
Pre-assembly D: Presenter table assembly . . . . . . . . . . . . . . . . . . . . . . . . . 6-40
Pre-assembly E: Presenter frame, right assembly . . . . . . . . . . . . . . . . . . . 6-41
Pre-assembly F: Presenter frame, left assembly . . . . . . . . . . . . . . . . . . . . . 6-42
Pre-assembly G: Paper guide assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-43
Pre-assembly H: Cutting sheet presenter module . . . . . . . . . . . . . . . . . . . 6-44
Main Assembly A: Printer module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-49
Main Assembly B: Cut sheet presenter module . . . . . . . . . . . . . . . . . . . . . 6-52
Main Assembly C: Roll paper supply module . . . . . . . . . . . . . . . . . . . . . . 6-53
Main Assembly D: Control circuit board and Cover, circuit boards
upper/ lower . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-54
Main Assembly E: Roll paper shaft assembly . . . . . . . . . . . . . . . . . . . . . . 6-57
Appendix
EU-T432 Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Printer Module Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Cut Sheet Presenter Module Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Roll Paper Supply Module Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
EU-T432 Lubrication Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Printer Module Lubrication Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Cut Sheet Presenter Module Lubrication Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Roll Paper Supply Module Adhesive Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Rev. A Features and Specifications 1-1
EU-T432 Technical Manual
Confidential
Chapter 1
Features and Specifications
Features
The EU-T432 is designed to be used for kiosks and cash dispensers. The featur es of th e EU-T43 2
are as follows:
❏ High speed receipt issuing: 150 mm/s {5.9"/s} maximum
❏ High reliability: 300,000 receipt issue
❏ Length of receipt: 228.4 mm {9"} maximum
(When the EU-T432 is equipped with an optional loop guide: 600 mm {23.6"}
❏ Available for large paper roll core dimensions:
203 mm {8"} diameter maximum
❏ Supports ESC/POS
equivalent commands
❏ Able to print bar codes (fence and ladder) and graphics
❏ Options available for all models:
• Japanese Kanji model: Supports JIS Level 1 and 2
• Simple Chinese model: Supports GB50007-85
• Traditional Chinese model: Supports BIG5 Level 1 and 2
• Korean model: Supports C-6501C
❏ Driver and status monitor are available.
1-2 Features and Specifications Rev. A
Confidential
System Configuration and Module Names
The whole systems is called the “EU-T432.” The EU-T432 consists of four modules and the
configuration of the modules are shown below:
Figure 1-1 EU-T432 appearance
paper roll supply modu le
cut sheet presenter module
control circuit board
module
printer module
Rev. A Features and Specifications 1-3
EU-T432 Technical Manual
Confidential
Specifications
The basic specifications of the EU-T432 are shown below. Refer to the specifications for the
EU-T432 issued by Seiko Epson Corporation for more details.
Table 1.1 Specifications
Item
Specification
Paper roll Outside diameter
152.4 mm {6"}
(When equipped with an optional part: 2 0 3 mm {8"))
Paper width
79.5 ± 0.5 mm {3.13 ± 0.02"}
Paper carrying speed
150 mm/s {5.9"/s} maximum
Paper length to be
presented
Issuing the cut sheet
(Receipt printing)
When the cut sheet is looped: 76.2 to 228.6 mm {3 to 9"}
When equipped with an optional loop guide:
76.2 to 600 mm {3 to 23.6"}
When the cut sheet is not looped:
76.2 to 3000 mm {3 to 118.1"}
Print speed
150 mm/s {5.9"/s} maximum
Print width
72 mm {2.84"} maximum (recommended)
Reliability Receipt printing
300,000 times
Printer
Mechanism: 15,000,000 lines
Thermal head: 100 km {62.14 miles},
100 million pulses
Paper roll Specified thermal paper
Original paper No.: P350 KSP
Original paper No.: TF50KS-E NIPPON PAPER
INDUSTRIES CO.,LTD
Original paper No.: PD160R
OJI PAPER MFG.CO., LTD
Original paper No.: TF11KS-ET NIPPON PAPER
INDUSTRIES CO.,LTD
Original paper No.: TF51KS-X1 NIPPON PAPER
INDUSTRIES CO.,LTD
Original paper No.: PD200N
OJI PAPER MFG.CO., LTD
Original paper No.: AFP234 MITSUBISHI PAPER MILLS
CO., LTD
A different paper type may give a different print
quality.
Paper thickness 60 to 150 µm
If the paper thickness is more than 120 µm, the paper
loop must not be used.
1-4 Features and Specifications Rev. A
Confidential
Module Combinations and Specifications:
Environmental condition Operating temperat ure 0 to 50°C
Operating humidity 10 to 80% RH
Table 1-2 Module Combinations and Specifications
Item
6 inch type
8 inch type
Combination of
each module
Paper roll module
Yes Yes
Printer module
Yes Yes
Control board module
Yes Yes
Cut sheet presenter
module
Yes Yes
Paper supply spacer
Yes
Mass
Approximatel y 3.8 kg
{8.38 lb}
Approximatel y 3.9 kg
{8.60 lb]
External dimensions (W × D × H): mm
194.7
×
170.6
×
300
{7.7
×
6.7
×
11.8"}
194.7 × 170.6
×
350
{7.7 × 6.7 × 13.8"}
Table 1.1 Specifications
Item
Specification
80
50
10
0
0 5 10 20 30 40 5550
34°C 80%
40°C 58%
50°C 35%
Print quality is
guaranteed.
+
Operation is
guaranteed.
Rev. A Operation Principles 2-1
EU-T432 Technical Manual
Confidential
Chapter 2
Operation Principles
Outline of Mechanism
The EU-T432 consists o f f our mo dule s: the paper rol l suppl y modu le, t he pri nter module, the cut
sheet presenter module, and the control circuit board module.
Paper Roll Supply Module
The paper roll supply module holds a large diameter paper roll and gu ides the paper to the
printer mod ule. This modu le consists of the paper holding part, the paper load-absorbing
mechanism, and the paper near-end detector. The appearance of this module is shown below.
Figure 2-1 Paper roll supply module appearance
lever, open
paper NE detector
shaft, roll paper
holder, roll paper A
holder, roll paper shaft
guide, roll paper tensio n
plate, opening and
shutting
holder, roll paper shaft
plate, roll paper guide
2-2 Operation Principles Rev. A
Confidential
Paper Holding Section
The paper roll holding mechanism is a shaft support type. The paper roll holding section
consists of the removable
shaft, roll paper
, the
holder, roll paper A
(for the inner diameter of
the paper core: 25.4 mm {1 i nch}) that fits the size of the paper roll core used, the
holder, roll
paper shaft
that supports the
shaft, roll pap er
and the
plate, roll paper guide
that holds the
sides of the paper roll.
The paper holding sectio n turn s on a fi xed screw sec tion so that t he paper holding sectio n can be
opened and closed. The paper holding section can be opened by pulling down the
plate,
opening and shutting
while holdin g down the
lever, open
. When closing the paper holding
section, pull up the
plate, opening and shutting
causing the
lever, open
to be locked
automatically; then the paper holding section is closed securely.
Note:
If the paper inner core dimension differs from the
holder, roll paper A
due to the paper thickness, you
can replace it with an optional holder, a
holder, roll paper B
(for the inner diameter of the paper core:
50.8 mm {2 inch}) or a
holder, paper roll C
(for the inner diameter of the paper core: 76.2 mm {3
inch}).
Paper Load-absorbing Mechanism
The paper load-absorbing mechanism consists of the
guide, roll paper tension
that receives
the paper tension. Using the paper tensile force generated when feeding the paper, this
mechanism oscillates the
guide, roll paper tension
and reduces the paper feeding load due to
inertia of the paper roll.
Paper NE Detector
The
paper NE detector
has two kind of detections, the primary NE detection and the
secondary NE detection. The primary NE detection can detect the amount remaining on the
paper roll using a reflecting photo sensor. After the primary NE detection, the secondary
detection can be used to return the status when the paper is fed to the length specified by the
memory switch setting. (See SW No. 2, 3 in Table 2-10 on page 2-20.)
The
paper NE detector
is mounted on the
frame
and is secured with a screw. The position of
the
paper NE detector
can be altered to adjust the setting for the amount remaining on the
paper roll.
Rev. A Operation Principles 2-3
EU-T432 Technical Manual
Confidential
Printer Module
The printer module has a printing mechanism with the paper feeding and a cutting mechanism
to cut the paper.
The printer consists of the following six mechanisms: the drive force transmission mechanism,
the paper feed mechanism, the printing mechanism, the paper guide mechanism, the detector
mechanism, and the autocutter mechanism.
Figure 2-2 Printer module appearance
Drive Force Transmission Mechanism
This mechanism consists of the
motor, paper feed, receipt, B
(fixed to pinion), the
gear,
reduction
, the
gear, idle r
, and the
gear, platen
. The printer uses a stepping motor, the
rotation force of which is reduced in sequence by the
gear, reduction
and the
gear, idl er
before being transmitted to the
gear, platen
. (The arrows in the figure below indicate the
direction of the gear rotation.) The
gear, platen
is mounted to the frame platen unit and
separates from the
gear, idle r
when the
platen
is open.
Figure 2-3 Drive force transmission mechanism
gear, platen
gear, idler
gear, reduction
motor, paper feed, receipt, B
2-4 Operation Principles Rev. A
Confidential
This printer uses a 4-phase bi-polar stepping motor driven by 24 V voltage controlled 2-2 phase
excitation. The maximum drive frequency of 2-2 phase excitation is 1200 pps. [pps: pulses per
second]
Paper Feed Mechanism
This mechanism consists of the paper feed mechanism and the platen-open mechanism.
Paper feed mechanis m
The paper feed mechanism consists of the
platen
(paper feed roller) and the
thermal head
.
When the
motor, paper feed, receipt, B
rotates counterclockwise as viewed from the shaft,
the gear train transmits the motion to the
platen
which rotates in direction A.
Figure 2-4 Paper feed mechanism
Paper feed operation during prin ting
The
platen
presses the thermal paper against the
thermal head
with a constant force. When
the
platen
rotates in direction A, the thermal paper advances in direction B.
Figure 2-5 Paper feed operation during printing
thermal head
platen
motor, paper feed, receipt, B
A
B
platen
thermal paper
A
Rev. A Operation Principles 2-5
EU-T432 Technical Manual
Confidential
Platen-open mechanism
The platen-open mechanism is used for the following purposes:
• Paper loading when using the printer with the curved path type. (Excluding when
using semi-autoloading mode.)
• Removing a paper jam when the paper jam has occurred
• The
thermal head
and the
platen
cleaning
The mechanism consists of the
frame, platen
, the
lever, platen
, the
shaft, platen
, the
spring,
lever
, the
lock lever
, the
spring, lock lever
, and the
pushplate , p l aten, B
.
In the
frame, platen
, the
platen
is mounted. The
lever, platen
is operated by hand to open t he
frame platen unit. The
shaft, platen
connects the
lever, platen
and the
frame, platen
to the
frame, base
in a manner which allows them to rotate. The
spring, lever
pulls the
lever,
platen
in the opposite direction of arrow A when the
platen
is open. The
lock lever
is located
on the gear train side of the
frame, platen
and locks the frame platen unit to the
frame, base
.
The
spring, lock lever
(inside the
lock lever
) pushes the
lock lever
back. The
pushplate,
platen, B
is secured on top of the
frame, platen
and covers the
fixed blade
.
When the frame platen unit is closed, the
platen
is in the print- ready position where the
gear,
platen
and the
gear, idler
are engaged and the power can be transmitted readily. Also, the
lock lever
is locked at a part of the
frame, base
to prevent the gears from disengaging.
To open the
platen
, turn the
lever, platen
in the direction of arrow A as shown in Figure 2-6.
Simultaneously, the
lock lever
is released and the frame platen unit is opened. To close the
platen
, turn the
lever, platen
in the opposite direction of arrow A until the lever stops.
Figure 2-6 Platen-open mechanism
frame, platen
shaft, platen
frame, base
spring, lock leve r
spring, lever
lever, platen
lock lever
gear, idler
gear, platen
A
< platen-open >
< platen-close >
push plate, platen, B
*The cover, gear is removed in these figures.
2-6 Operation Principles Rev. A
Confidential
Printing Mechanism
This mechanism consists of the
thermal head
which has the head heating elements a rrange d in
a series and has a driver IC for controlling voltage to the head heating elements, the
platen
which is also used for the paper feed mechanism as well as this mechanism (the
thermal head
is also used for both mechanisms), and the
spring, press head
. The
platen
presses the thermal
paper wrapped around the
platen
against the head heating elements pressed by the
spring,
press head
. When the elements are activated, the paper is heated at the designated points,
resulting in the printing actio n.
Printing operation principles
The cross-sections of the
thermal head
and the thermal paper are shown below. Printing is
performed in the following steps:
Figure 2-7 Cross -section of thermal head and thermal paper
1. Drive pulses are sent to the designated dot electrodes in accordance with the print signal.
2. Since the resistor layers are formed at the top of each electrode inside of the
thermal head
,
the resistor layers are heated up when the drive pulses are sent to the electrodes.
3. The thermal energy of the heated resistors is transferred via the protective layer of the
thermal head
to the surface of the thermal paper, and the heat-sensitive layer of the paper
changes color, thus forming the printed character.
<cross-section of thermal paper>
<cross-section of thermal head>
<top view of thermal head>
base
heat- sensitive layer
resistor layer
protective layer
electrode layer
ceramic base plate
glaze layer
electrode laye r
electrode laye r
resistor layer
Rev. A Operation Principles 2-7
EU-T432 Technical Manual
Confidential
Data input and printing
The
thermal head
consists of the head heating elements, the head driver, which controls or
drives the head heating elements, and the
thermistor,
which detects the temperature of the
thermal head
. The serial print data input from Data In (DI1) is synchronized to the CLOCK
(CLK) input, and temporarily placed in the SHIFT REGISTER. Using the LATCH (/LAT) signal
timing, these data are then stored in the LATCH REGISTER. Activated by the STROBE signals
(/STR1, /STR2), the stored print data is used to control the gate ON condition for the head
heating element drive pulse.
This printer is equipped with two strobes, and can print using a maximum of four divisions.
The drive pulse width is controlled by the control circuit board module.
Figure 2-8 Thermal head block diagram
Table 2-3 Strobe and Dot Number
STROBE No. Dot No. Dots/STROBE
1 1 to 320 320
2 321 to 640 320
*The STB terminals are pulled down in the con trol IC.
64 output each
2-8 Operation Principles Rev. A
Confidential
Paper Guide Mechanism
This mechanism consists of the paper guide mechanism. The paper path consists of the
paper
guide, straight, front
and the
paper guide, straight, back
. The paper path is shown below.
Figure 2-9 Paper path
Detector Mechanism
This mechanism consists of the paper-end mechanism, the platen-open detector mechanism, the
head temperature detector mechanism, and the black mark detector mechanism.
Paper-end detector mechanism
The paper-end detector mechanism is located inside the paper guide mechanism to detect the
end of the thermal paper and the paper insertion state in the semi-autoloading mode. This
mechanism consists of the
transparent photo sensor
, the
lever, paper detector
which
presses against the thermal paper and the
spring, paper detector
which pulls the
lever,
paper detector
.
Figure 2-10 Paper -end detector circuit
paper guide, straight, back
paper guide, straight, front
platen
paper
<printer side>
paper-end detector signal
Photo interrupter
Pin No.
220
Ω
75 K
Ω
13 V
13
V
DD
11
7, 8, 10
GND
Rev. A Operation Principles 2-9
EU-T432 Technical Manual
Confidential
The
transparent photo
sensor is in a high state (HI) when the paper is present, and in a low
state (LOW) when the paper is not present because the
lever, paper detector
blocks light to
the sensor. When the end of the thermal paper passes through the paper guide, the
lever, paper
detector
operates as shown in Figure 2-11. At this time, the output level from the
transparent
photo sensor
varies as shown in Figure 2-12, then the absence of paper is detected. When the
semi-autoloading function is used, the insertion of paper changes the status from “no paper” to
“paper.” Since the output level changes from LOW to HI , the status changes to “paper”; th en the
semi-autoloading function is in itiated.
Figure 2-11 Paper-end detector mechanism
Figure 2-12 Paper-end detector operation
platen
thermal head
transparent photo
sensor
lever, paper detector
paper guide, straight, front
frame, base
paper
<paper-present condit ion >
<paper-absent cond it io n>
paper guide, straight, back
paper-end signal
conductive confirma tion
paper-end detection
2-10 Operation Principles Rev. A
Confidential
Platen-open detector mechanism
The platen-open detector mechanism has a
microswitch
which detects whether the
platen
is
open (printing impossible because the
thermal head
is away from the
platen
) or closed
(printing possible). The
microswitch
can be OFF only when the
frame, platen
is perfectly
closed, and at all other times is ON.
Figure 2-13 Platen-open detector circuit
Head temperature detector mechanism
The
thermal head
has a
thermistor
to detect the temperature of the
thermal head
.
Black mark detector mechanism
The black mark mechanism is a device whi ch can be at tached insi de the paper g uide mechanism
to determine the printing position when using pre-p ri nted ther mal pap er. Th is mec hani sm uses
the reflective photo sensor.
Figure 2-14 Black mark detector circuit
<printer side> Pin No.
platen open
platen open
Pins 14 and 15 can be reversed.
14
15
SW2
SW1
Pin No.
black mark de tector
output
<printer side>
220
Ω
0 to 100 K
Ω
10 K
Ω
13
V
DD
12
7, 8, 10
GND
Rev. A Operation Principles 2-11
EU-T432 Technical Manual
Confidential
Black marks are detected through changes in output level from the reflective photo sensor. The
changes in reflectivity between the pre-printed black marks and blank areas of the thermal
paper cause the amount of light returning to the sensor to vary; then the sensor output level is
also varied as shown in Fig ure 2-15 . These v ariat ions ar e used t o detec t the black mark. Si nce the
relationship between the black mark an d the pri nt positi on can be specified in the pr inter set up,
detecting the black mark permits the correct positioning of the paper.
Figure 2-15 Black mark detecting operation
Autocutter Mechanism
This mechanism consists of the fixed blade mechanism, the movable cutter blade mechanism
and the emergency cutter mechanism.
The basic principl e of t he aut ocutt er mecha nism is an appl icati on of the sci ssors princi ple, where
the paper is cut by two crossi ng blades. A config urati on which al lows the two blades to separate
has been adopted so that the
fixed blade
separates from the
movable cutter bl ade , full
when
the
platen
is open.
Fixed blade mechanism
This mechanism is mounted on the frame platen unit. This configuration consists of the
fixed
blade
which cuts the paper directly, the
spring, fixed blade
which stabilizes the vertical
positioning of the
fixed blade
, and the
cover, fixed blade
which covers the
fixed blade
and
is a paper guide as well as makes the operation to open the
platen
safe.
Figure 2-16 Fixed blade mechanism
black mark de tector signal
conductive confirmation
black mark detection
spring, fixed blade
fixed blade
cover, fixed blade
frame, platen unit
2-12 Operation Principles Rev. A
Confidential
Movable cutter blade m ec h an ism
This mechanism is mounted on the
frame, base
.
The drive force tr ansmission mec hanism is on the
cover, cutter
side. The
motor, cutter
is a DC
brush motor on the
gear, cutter motor
. It supplies the power and is attached on the
cover,
cutter
with screws. The
gear, reduction A/C
and the
gear, cutter worm
are supported by t he
shaft, reduct i o n A/C
, and the
gear, cutter drive
is attached with push nuts to the
shaft,
cutter drive gear
fixed on the
cover, cutter
.
After being transmitted through the
gear, reduction A/C
and the
gear, cutter worm
, the
power is transmitted to the
gear, cutter drive
. The
gear, reduction A/C
is pushed against the
gear, cutter w o r m
by the
spring, cutter clutch
and the
washer, Clutch
, forming a one-way
clutch which is used to cut off the transmission of power when the transmitted load exceeds a
prescribed level during paper cuttin g.
The rotational movement of the
gear, cutter drive
is transmit ted to the back and forth
movement of the
movable cutter blade
by being engaged with the
shaft, movable cutter
blade drive
with the oval hole of the
movable blade
on the
frame, cutter
. Also, the
microswitch
attached to the
cover, cutter
is connected t o th e
gear, cutter drive
, enabling it to
detect the position of the
movable cutter blade
. The lead wires of the
motor, cutter
and the
microswitch
are bound together and connect to the
circuit board
.
The
shaft, movable cutter blade
is on the
frame, cutter
side. The
receiver, movabl e cutter
blade
, the
spacer, movable cutter blade
, the
spring, movable cutter blade
and the
washer, movable cutter blade spring
are mounted on the
shaft, movable cutter blade
in a
group with a push nut.
When putting the
cover, cutter
and the
frame, cutter
together, engage the
shaft, movable
cutter blade drive
with the oval hole of the
movable cutter blade
, and secure the
cover,
cutter
and the
frame, cutter
with screws.
Figure 2-17 Movable cutter blade mechanism
gear, cutter drive
shaft, cutter drive gear
cover, cutter
shaft, movable cutter
blade drive
gear, cutter worm
shaft, reduction A/C
(inside the gear, cutter
worm: dot lined part)
frame, cut ter
movable cut ter blade , full
receiver, movable
cutter blade
spring, movable
cutter blade
washer, movable
cutter blade spring
shaft, movable cutter blade
spacer, movable cutter blade
motor, cutter
microswitch
gear, cutter motor
Rev. A Operation Principles 2-13
EU-T432 Technical Manual
Confidential
Autocutting operation
The
autocutter
will operate when the frame platen unit is closed and a paper is loaded. (The
frame platen unit c an be c losed when t he
movable cutter blade, full
is in the standby position.
The autocutting operation is performed in the following steps:
1. Drive the
motor, cutter
in the forward rotation.
2. The
microswitch
is switched from OFF (open) to ON (closed) while the
motor, cutter
continues to rotate in the forward rotation. The
movable cutter blade, full
intersects with
the
fixed cutter blade
and cuts the paper from the ri ght t o t he l eft, toward t he fi rst co lumn.
3. After cutting the paper, the
movable cutter blade, full
starts to return to the home
position.
4. As the
movable cutter blade, full
approaches the home position, the
microswitch
is
switched from ON (closed) to OFF (open); then the
motor, cutter
stops rotating and the
brake is applied.
Figure 2-18 Auto cutting operation
Figure 2-19 Auto cutting control example
fixed blade
spring, fix e d blade
movable cut ter blade , full
cutter motor forward driving
cutter motor brake
switch signal rectifying
waveform
2-14 Operation Principles Rev. A
Confidential
Note:
If the
movable cutter blade, full
cannot be returned to the home position because of foreign matter
locking the blade when powered by the
motor
, rotate the knob on the
gear, cutter worm
with a tool
such as a ball-point pen or tweezers to move the
movable cutter blade, full
to the home position. The
window on the
cover, cutter
can be used to check if the
movable cutter blade, full
has returned to
the home position.
Figure 2-20 Home position check
window
<Movable cutter blade in the home position>
knob
Rev. A Operation Principles 2-15
EU-T432 Technical Manual
Confidential
Cut Sheet Presenter Module
The cut sheet presenter module has a mechanism to feed the paper printed and cut by the
printer mod ule to the paper exit.
Figure 2-21 Appearance of cut sheet presenter module
Paper Feeding Operation (With a Loop)
A paper feeding operation is performed at the same time with the start of the paper feeding of
the printer module. The
motor, cutting paper feed
rotates in the clockwise direction as seen
from the shaft direction, and the
roller, presenter
rotates in the clockwise direction via the
gears. The
roller, cutting paper hold
is pressed to the
roller, presenter
by a spring.
The paper sent from the print er mod ule i s fed along the p aper guidin g par t, and fe d be tween t he
roller, presente r
and the
roller, cutting paper hold
. When the tip of the paper reaches the
detection position of the
paper presence sensor
, the
motor, cutting paper feed
stops
temporarily.
Figure 2-22 Start of the cut sheet feeding
roller, cutting paper hold
paper eject sensor
roller, presenter
paper presence sensor
motor, cutting paper feed
autocutter
paper exit
2-16 Operation Principles Rev. A
Confidential
While the tip of the paper sent from the printer module is in the standby state between the
roller,
presenter
and the
roller, cutting paper hold
, the paper is continuously fed from the printer
module. The paper pushes up the
paper guide, upper
and temporarily forms a loop.
Figure 2-23 Cut Sheet with Loop
When the paper feed from the printer module is finished, the cutter on the printer module cuts
the paper; then the
motor, cutting paper feed
resumes rotating and the cut sheet is fed from
the
roller, presenter
to the
paper exit
.
When the
paper eject sensor
detects the end of the cut sheet, the
motor, cutting paper feed
stops. With the cut sheet between the
roller, presente r
and the
roller, cutting paper hold
, a
series of operations is completed and the cut sheet is ejected from the
paper exit
.
A
paper presence sensor
can detect whether or not the cut paper is removed.
Figure 2-24 End of the Cut Sheet Feeding Operation
motor, cutt in g pa p er feed
roller, presenter
paper guide, upper
roller, cutting paper hold
loop
autocutter
paper exit
autocutter
paper guide, upper
roller, cutting paper hold
paper exit
roller, presenter
cut sheet
paper eject sensor
motor, cutting pape r feed
paper presence sensor
Rev. A Operation Principles 2-17
EU-T432 Technical Manual
Confidential
Paper Feeding Operation (Without a Loop)
The cut sheet presenter module can feed paper without forming a loop.
Figure 2-25 Cut Sheet Operation without Loop
Note:
During paper feeding operations without a loop, do not pull out the paper.
Detector Mechanism
The detector mechanism consists of the
presenter open sensor
, the
paper eject sensor
, and
the
cut sheet presence sensor
.
Presenter open se n sor
This sensor detects whether the
cut sheet presenter module
is open or not.
Paper eject sen s or
This sensor detects the paper presence in the paper feeding route.
Cut sheet presence sensor
This sensor detects whether or not the cut sheet has been removed.
roller, cutting paper hold
motor, cutting paper feed
roller, presenter
paper exit
paper guide, upper
2-18 Operation Principles Rev. A
Confidential
Control Circuit Board Module
The control circuit board module controls all functions of each module and has the interface
connectors and the power supply terminals. Each function can be set by using the DIP switches
and the memory switches.
Figure 2-26 Appearance of the control circuit board module
DIP Switches
The circuit board has two DIP switches (DSW 1/2). Each setting is as follows:
DIP Switch 1
*: Effective only when the serial interface is selected .
Table 2-1 DSW 1
SW No. Function
ON OFF
Default Setting
1 Black mark dete c ot o r Enable d Disabled
OFF
2
Interface selection
Refer to Table 2-2
3
4 Serial interface
handshaking
XON/XOFF DTR/DSR or
CTS/RTS
OFF*
5 Serial interface parity
check
Yes No
6 Serial interface parity
selection
Even Odd
7
Serial interface baud
rate selection
Refer to Table 2-3
8
DIP switch 1
DIP switch 2
Rev. A Operation Principles 2-19
EU-T432 Technical Manual
Confidential
bps: bits per second
DIP Switch 2
(*1): Fixed to OFF
(*2): Effective only w he n th e s eria l in terface is selected.
Table 2-2 Interface Selection
Interface
Switch No. 2 Switch No.3
Parallel interface (IEEE1284) OFF OFF
Serial interface (RS232) OFF ON
Optional interface ON ON or OFF
Table 2-3 Baud Rate Selection
Transmission speed (bps) Switch No.7 Switch No.8
4800 ON ON
9600 OFF ON
19200 ON OFF
38400 OFF OFF
Table 2-4 DSW 2
SW No. Function
ON OFF
Default setting
1
Model type selection Refer to Table 2-5
ON
2
OFF
3
Print density selec tio n
Refer to Table 2-6
4
5 Operation mode
selection
Refer to Table 2-7
6Factory use OFF (*1)
7 I/F pin 6 reset signal-1
Enabled
Disabled
OFF (*2)
8 I/F pin 6 reset signal-2
Enabled
Disabled
Table 2-5 Model Type Selection
Model Switch No.1 Switch No.2
79.5 mm {3.15"} paper-width model: 576 dots) ON OFF
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