Epson EU-T532, EU-T542 Technical Manual

Confidential

Technical manual

Thermal printer unit

EU-T532/T542

English

4012872

Issued Date 199 , ,
Issued by

Rev. A i

M-T532/T542 Technical Manual

Confidential

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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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❏ Neither Seiko Epson Corporation nor its affiliates shall be liable to the purchaser of this product or third parties

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, etc., are not exposed.

Touching moving parts could cause a laceration or other injury.

Rev. A iii

M-T532/T542 Technical Manual

Confidential

About This Manual

This manual is consisted 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, general specifications for the
EU-T532/T542.

Chapter 2
Operation Principle

This chapter contains the outline and principles of
mechanisms.

Chapter 3
Handling

This chapter contains precautions on handling, paper
loading/unloading pap er an d rem ovi ng jamm ed pap e r.

Chapter 4
Maintenance

This chapter contains cleaning, inspection, lubrication and
tools.

Chapter 5
Repair

This chapter contains repair levels, repair procedure and
troubleshooting.

Chapter 6
Assembly and Disassembly

This chapter contains assembly and disassembly for the unit s
and the modules of the EU-T532/T542.

Appendix

Appendix contains the exploded, and the lubrication
diagrams of the EU-T532/T542.

iv Rev. A

Confidential

Contents

About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iii

Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv

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 Loop) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Paper Carrying Operation (Without Loop) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Retract Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Detector Mechanism . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Control Circuit Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

Memory Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

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/Closing Units and Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Paper Roll Supply Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Printer Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Cut Sheet Presenter Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Loading/Removing Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Loading Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Removing Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Removing Jammed Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Removing Jammed Paper in the Cut Sheet Presenter Module . . . . . . . . . . . . 3-8

Removing Jammed Paper in the Printer Module . . . . . . . . . . . . . . . . . . . . . . . 3-8

Paper NE Detector Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Rev. A v

M-T532/T542 Technical Manual

Confidential

Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Performing the Self Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Self Test End . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

LED Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

POWER LED (Power Supply Error): Green . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

PAPER OUT LED (Paper-End Error): Red . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

ERROR LED (Error): Red . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

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, Disassembly

Small Parts Abbreviation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27

Component Configurations Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27

Unit Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-27

Module Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-28

Unit Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-30

Cover, circuit board A/B and Control circuit board module . . . . . . . . . . . . . 6-30

Paper Exit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-33

Cut sheet presenter module, Holding plate, printer, Plate, lower paper guide,

Plate, paper guide holder, and Holder, paper roll . . . . . . . . . . . . . . . . . . . . . . 6-34

Module Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-38

Paper roll supply module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-38

Cut sheet presenter module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43

Appendix

EU-T532/T542 Exploded Diagram (Type 1 and 2) . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

EU-T532/T542 Exploded Diagram (Type 3 and 4) . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Paper Roll Supply Module Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Printer Module Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Cut Sheet Presenter Module Exploded Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . A-5

Paper Roll Supply Module Lubrication Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

Printer Module Lubrication Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7

Cut Sheet Presenter Module Lubrication Diagram . . . . . . . . . . . . . . . . . . . . . . . . . A-8

vi Rev. A

Confidential

Rev. A Features and Specifications 1-1

EU-T532/T542 Technical Manual

秘秘秘秘 /Confidential

Chapter 1

Features and Specifications

Features

The EU-T532/T542 (EU-T532 for 79.5 mm {3.13"} paper width/ EU-T542 for 82.5 mm {3.25"}
paper width) is designed to be used for issuing tickets and receipts at banks, kiosks and other
similar locations. The features of the EU-T532/T542 are as follows:

❏ High speed receipt issuing: 150 mm/s {5.9"/s} maximum
❏ High reliability: 600,000 receipt issue
❏ Length of receipt: 228.4 mm {9"} maximum
❏ Available for large paper roll core dimensions: 254 mm {10"} 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

❏ Optional cut sheet retracting mechanism can be used for the EU-T532/T542 Type 2 and 4
❏ Able to perform the remote monitoring using a status monitor

1-2 Features and Specifications Rev. A

秘秘秘秘 /Confidential

System Configuration and Module Names

The whole systems is called the “EU-T532/T542,” and each unit is called a “module” which can
be separated from the others. The EU-T532/T542 has four types, type 1 to 4, depending on the
combination of the modules. (See “Module Combinations and Specifications” on page 1-4.) The
configurations of the modules are as follows:

Figure 1-1 EU-T532/T542 appearance (Type 1 and 2)

Figure 1-2 EU-T532/T542 appearance (Type 3 and 4)

paper roll supply modu le

control circuit board module (inside)

printer module

cut sheet presenter module

holding plate, printer

printer module

cut sheet presenter
module

control circuit board module

*The mounting place for the contro l circui t
module will differ depending on users.

Rev. A Features and Specifications 1-3

EU-T532/T542 Technical Manual

秘秘秘秘 /Confidential

Specifications

The specifications of the EU-T532/T5 42 are shown belo w. Refer to specificat ions for th e EU-T532
and the EU-T542 issued by Seiko Epson Corporation for details.

Table 1.1 Specifications

Item

Specification

Paper roll Outside diameter

254 mm {10"}

Paper width

EU-T532: 79.5 ± 0.5 mm {3.13 ± 0.02"}
EU-T542: 82.5 ± 0.5 mm {3.25 ± 0.02"}

Paper carrying speed

150 mm/s {5.9"/s} maximum

Paper length to be
presented and retracted

Issuing the cut sheet
(Receipt printing)

76.2 to 228.6 mm {3" to 9"}

(When the cut sheet is looped)

76.2 to 3000 mm {3" to 118.1"}

(When the cu t sh e et is not looped )

Retracting the cut sheet 76.2 to 228.6 mm {3" to 9"}

(When the cut sheet is ejected downward of the cut
sheet presenter module: Type 2 and 4)

Print speed

150 mm/s {5.9"/s} maximum

Print width

72 mm {2.84"} maximum (recommended)

Reliability Receipt printing

600,000 times

Cut sheet retracting

60,000 times

Printer

Mechanism: 15,000,000 lines
Thermal head: 100 km {62.14 miles}

Paper roll Specified thermal paper

Original paper No.: P350 KSP
Original paper No.: TF50KS-E NIPPON PAPER

INDUSTRIES CO.,LTD
Original paper No.: KF50 KANZAN
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

1-4 Features and Specifications Rev. A

秘秘秘秘 /Confidential

Module Combinations and Specifications

The EU-T532/T542 can be used as four different types by the mod ule c ombinations. The mod ule
combinations, functions and specifications are as follows:

(*): The printer pulls a cut sheet that has been forgotten in the print er an d ejects it to the low er part of the cut

sheet presenter module.

Environmental condition Operating temperat ure 0 to 50°C

Operating humidity 10 to 80% RH

Item

Type 1

Type 2

Type 3 Type 4

Functions Paper roll is held by

a fixed shaft.

Yes Yes



Cut paper is
advanced by a cut
sheet presenter.

Yes Yes Yes Yes

Cut sheet is
retracted if the user
forgets to remove
the paper.



Yes (*)



Yes (*)

Module
combination

Paper roll supply
module

Yes Yes



Printer module

Yes Yes Yes Yes

Control circuit
board module

Yes Yes Yes Yes

Cut sheet presenter
module

Yes Yes

(with a retracting
function)

Yes Yes

(with a retracting

function)

Mass

Approximately

5.5 kg

{12.13 lb}

Approximately

5.5 kg

{12.13 lb]

Approximately

2 kg

{4.41 lb}

Approximately

2 kg

{4.41 lb}

External dimensions
(W × D × H): mm {inch}

176

×

520.7

×

231.4

{6.93 × 20.5

×

9.11"}

176 × 520.7

×

231.4

{6.93 × 20.5 × 9.11"}

139.3 × 174.6

×

165

{5.48 × 6.85 × 6.5"}

139.3 × 174.6

×

165

{5.75 × 6.85 × 6.5"}

Table 1.1 Specifications

Item

Specification

80

50

10
0

0 5 10 20 30 40 5550

+

50°C 35%

40°C 58%

34°C 80%

Print quality is
guaranteed.

Operation is
guaranteed

.

Rev. A Operation Principles 2-1

EU-T532/T542 Technical Manual

Confidential

Chapter 2

Operation Principles

Outline of Mechanism

The EU-T532/T542 consists of four modules: the paper roll supply module, the printer 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 nearend detector. The appearance of this module is shown below.

Figure 2-1 Paper roll supply module appearance

frame, main

paper nearend detector

screw, paper nearend detector

holder, paper roll
(Inside: shaft, paper roll)

holding plate, pape r roll

paper roll hold unit

plate, fixed

frame, paper roll tension
(Inside: spring, pape r roll tension)

shaft, paper roll tension roller

roller, paper roll tension

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

shaft, paper roll

fixed to the

frame, main a sse m b l y

, the

holder, paper roll A

(for the inner diameter of the paper core: 25. 4 mm {1 inch}) that fits the size of t he paper roll core
used, and

paper roll hold unit

that holds the sides of the paper roll.

The

paper roll hold unit

is supported by the

holding plate, paper roll

so that it can open/

close. The

plate, fixed

slides into the groove of the

shaft, paper roll

and is automatically

locked when the

paper roll hold unit

pushes against the

shaft, paper roll

. To open the

paper

roll hold unit

, see the illustration (a sticker) on the

plate, fixed

: slightly lif t the bottom of the

plate, fixed

in the direction of the arrow (upwards) to release the lock, and then pull it toward

the near side to open the unit. (For the illustrati on of the sticker, see page 3-6.)

Note:

If the paper inner core dimension differs from the

holder, paper roll A

due to the paper thickness, you

can replace it with the

holder, paper roll B

(for the inner diameter of the paper core: 50.8 mm {2 inch})

or the

holder, paper roll C

(for the inner diameter of the paper core: 76.2 mm {3 inch}) packed in the

box. (See page 6-37, “Assembly and Disassembly.” for replacement.)

Paper Load-absorbing Mechanism

The paper load-absorbing mechanism consists of four parts: the

rolle r, pape r ro l l t ensi o n

, the

shaft, paper roll tension roller

, the

frame, paper roll tension

, and the

spring, paper roll

tension

. The

roller, paper roll tension

receives the paper tension. The

shaft, paper roll

tension roller

supports the

roller, paper roll tension

so that the

roller, paper roll tension

can

rotate. The

frame, paper roll tension

fixes the previous two parts and is mounted on the

shaft,

paper roll

. The

spring, paper roll tension

is hooked on one end to the

frame, main

assembly

, and on the other end to the

frame, paper roll tension

.

Using the paper tensile force generated when feeding the paper, this mechanism oscillates the

roller, paper roll tension

around the

shaft, paper roll

, and reduces the paper feeding load due

to inertia of the paper ro ll.

Note:

In order to use the function of this mechanism properly, paper must be fed along the paper rout e indicated
in the illustration on the

paper roll hold unit

. Feeding paper along the paper route other than the route

in the illustration may cause improper operation or printing disorders.

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 2-8 [page 2-22])

The

paper NE detector

is mounted on the

frame, paper roll tension

, and is secured with the

screw, NE detector

. The position of th e

paper NE detector

can be altered to adjust the sett ing
for the amount remaining on the paper roll. (See “Paper NE detector setting method”on page
3-9.)

Rev. A Operation Principles 2-3

EU-T532/T542 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

printer module

holding plate, printer

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

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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

the 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 will be 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

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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-T532/T542 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 outpu t l evel cha nges fro m LOW to H I, the st atus c hanges
to “paper”; then the semi-autoloading function is initiated.

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

The pin No.s 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-T532/T542 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, H

separates from the

movable cutter blade, full, H

when the

platen

is open.

Fixed blade mechanism

This mechanism is mounted on the frame platen unit. This configuration consists of the

fixed

blade, H

which cuts the paper directly, the

spring, fixed b l ade

which stabilizes the vertical

positioning of the

fixed blade, H

, and the

cover, fixed blade

which covers the

fixed blade,

H

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, H

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 t he

frame, base

. The drive force transmission mechanism is on

the

cover, cutter, H

side. The

motor, cutter, H

, which is a DC brush motor attached the

gear,

cutter motor

. It supplies the power and is attached on the

cover, cutter, H

with screws. The

gear, cutter worm, H

is supported by the

shaft, reduction A/C

, and the

gear, cutter drive,

H

is attached with push nuts to the

shaft, cutter drive gear

fixed on the

cover, cutter, H

.

After being transmitted through the

gear, cutter worm, H

, the power is transmitted to the

gear, cutter drive, H

.

The rotational movement of the

gear, cutter drive, H

is translated to the back and forth

movement of the

movable cutter blade, full, H

by being engaged the

shaft, movabl e cu tte r

blade drive

with the oval hole of the

movable cutter blade, full, H

on the

frame, cutter

.

Also, the

microswitch

attached to the

cover, cutter, H

is connected to the

gear, cutter drive,

H

, enabling it to detect the position of the

movable cutter blade, full, H

. The lead wires of the

motor, cutter, H

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, movable

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, H

and the

frame, cutter

together, engage the

shaft, movable

cutter blade drive

with the oval hole of the

movable cutter blade, full, H

, and secure the

cover, cutter, H

and the

frame, cutter

with screws.

Figure 2-17 Movable cutter blade mechanism

gear, cutter drive, H

shaft, cutter drive gear

cover, cutter, H

shaft, movable cutter
blade drive

gear, cutter worm, H

shaft, reduction A/C
(inside the gear, cutter
worm: dot lined part)

frame, cut ter

movable cut ter blade , full, H

receiver, movable

cutter blade

spring, movable
cutter blade

washer, mo vab l e

cutter blade spring

shaft, movable cutter blade

spacer, movable cutter blade

motor, cutter, H

microswitch

gear, cutter motor

Rev. A Operation Principles 2-13

EU-T532/T542 Technical Manual

Confidential

Auto cutting operation

The

autocutter

will operate when the frame platen unit is closed and a paper is loaded. (The

frame platen unit can be closed when the

movable cutter blade, full, H

is in the standby

position. The auto cutting operation is perform ed in the followi ng steps:

1. Drive the

motor, cutter, H

in the forward rotation.

2. The

microswitch

is switched from OFF (open) to ON (closed), while the

motor, cutter, H

continues to rotate in the forward rotation. The

movable cutter blade, full, H

intersects

with the

fixed cutter blade, H

and cuts the paper from the right to the left, to the direction

of the first column.

3. After cutting the paper, the

movable cutter blade, full, H

starts to return to the home

position.

4. As the

movable cutter blade, full, H

approaches the home position, the

microswitch

is

switched from ON (close) to OFF (open); then the

motor, cutter, H

stops rotating and the

brake is applied.

Figure 2-18 Auto cutting operation

Figure 2-19 Auto cutting control example

fixed blade, H

spring, fix e d blade

movable cut ter blade , full, H

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, H

can not be returned to the home position because of a foreign

matter locking the blade when powered by the

motor

, rotate the knob on the

gear, cutter w o r m, H

with a tool such as a ball-point pen or tweezers to move the

movable cutter blade, full , H

to the home

position. The window on the

cover, cutter, H

can be used to check if the

movable cutter blade,

full, H

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-T532/T542 Technical Manual

Confidential

Cut Sheet Presenter Module

The cut sheet presenter module has a mechanism to carry the paper printed and cut by the
printer module to the paper exit. Also, it has an optiona l cut sheet retr acting func tion to r etract a
cut sheet when the cut sheet is not removed.

Figure 2-21 Appearance of cut sheet presenter module

Paper Carrying Operation (With Loop)

A paper carrying operation is performed at the same time with the start of the paper feeding of
the printer module. The

motor, paper fe ed rec eip t, B

rotates in the clockwise direction as

seen from the shaft direction, and the

roller, cut sheet presenter

rotates in the clockwise

direction via the gears. The

roller, cut sheet hold

is pressed to the

roller, cut sheet presenter

by a spring. The first

roller, cut sheet presenter

and the

roller, cut sheet hold

, and the

second

roller, cut sheet presenter

and the

roller, cut sheet hold

are connected with the

belt,

cut paper presenter transmission

(not shown) and rotate in the same direction.

The paper sent from the printer module is fed along the paper guiding part, and carried between
the first

roller, cut sheet presenter

and the

roller, cut sheet hold

. When the tip of the paper

reaches the detection position, the

motor, paper feed receipt, B

stops temporarily.

Figure 2-22 Start of the cut sheet carrying

carried paper sensor

roller, cut sheet hold (first)

cut sheet

roller, cut sheet presenter (second)

motor, paper feed,
receipt, B

roller, cut sheet hold (second)

roller, cut sheet presenter (first)

2-16 Operation Principles Rev. A

Confidential

The tip of the paper sent from the pri nter mod ule is in the stand by state be tween the first

roller,

cut sheet presenter

and the

roller, cut sheet hold

, and the paper is contin uously fed fr om 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

motor, paper feed receipt, B

resumes rotating. At this time, the cutter on the printer module cuts the paper. The cut sheet is
passed from the first

roller, cut sheet presenter

to the second

roller, cut sheet presenter

,

and is carried to the

paper exit

.

When the

carried paper sensor

detects the end of the cut sheet, the

motor, paper feed

receipt, B

will stop. With the cut sheet between the second

roller, cut sheet presenter

and the

second

roller, cut sheet hold

, a series of operations is completed and the cut sheet is ejected

from the

paper exit

.

A

cut sheet presence sensor

is provided near the

paper exit

to detect whether or not the cut

paper is remo ved by a recipient.

Figure 2-24 End of the Cut Sheet Carrying Operation

roller, cut sheet presenter (first)

roller, cut sheet hold (first)

paper guide, upper

cut sheet

autocutter

autocutter

carried paper sensor

roller, cut sheet hold (second)

cut sheet p resence sensor

paper exit

roller, cut sheet presenter (second)

cut sheet

roller, cut sheet hold (first)

roller, cut sheet presenter (first)

Rev. A Operation Principles 2-17

EU-T532/T542 Technical Manual

Confidential

Paper Carrying Operation (Without Loop)

The cut sheet can be carried without forming a loop.

Figure 2-25 Cut Sheet Operation without Loop

Note:

During paper carrying operations without a loop, do not pull out the paper.

Retract Function

The retract function retracts the cut sheet inside the unit if the recipient does not take the cut
sheet. The retract mechanism consists of the

frame, paper route change

, the

plate, route

change guide

, the

roller, retract

, the

solenoid

, and the

paper path change sens or

.

The retracting operation is started by a command signal for the retraction. At first, the

paper

route change

performs the paper path change operation to retract the cut sheet. When the

solenoid

linked with the

frame, paper route c h a nge

is energized, the

frame, paper route

change

and the

plate, route change guide

move in direction A. After the

paper route

change sensor

detects the end of the paper route change operation, the

motor, paper feed

receipt, B

begins to rotate in the counterclockwise direction; then through the gears, the

roller,

cut sheet presenter

and the

roller, retract

inside the retracting paper route rotate and the cut
sheet is retracted into the unit through the retracting paper route. The retracted cut sheet will fall
to the bottom of the cut sheet presenter module.

roller, cut sheet hold

cut sheet

roller, cut sheet presenter

2-18 Operation Principles Rev. A

Confidential

Figure 2-26 Retract Function

Detector Mechanism

The detector mechanism consists of the

cover, open sensor

, the

carried paper sensor

, the

cut sheet presence sensor

, the

paper path change sensor

, and the

retracted paper

sensor 1

.

Cover open sensor

This sensor detects whether the

upper frame, cut sheet pres e nte r unit

is open or not.

Carried paper sensor

This sensor detects the paper presence in the paper carrying route.

Cut sheet presence sensor

This sensor detects whether or not a recipient has taken the cut sheet.

Paper path chan ge sensor

This sensor detects the retracted paper route change when the cut sheet is not taken.

Retracted paper sensor 1

This sensor detects the paper presence in the retracted paper route.

cut sheet

retracted paper sensor 1

plate, paper route
change guide

paper path change sensor

roller, retract

frame, paper route change

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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 2-27 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 sensor Enabled 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

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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

EU-T532 (79.5 mm {3.15"} paper-width model: 576 dots) ON OFF
EU-T542 (82.5 mm {3.25"} paper-width model: 640 dots) OFF OFF

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Notes:

・Changes in DIP switch settings (excluding switches 2-7 and 2-8 interfac e reset signal s) are reco gn ized on ly

when the printer power is turned on or when the printer is reset by using the interface.

・If you turn on DIP SWs 2-7 and 2-8 while the printer power is turned on, the printer may be reset, depending on

the signal state. DIP switches should not be changed while the printer power is on.

Memory Switches

Other settings except DIP switches 1 and 2 are set by the memory switches. (The settings are
changed with a

GS (E

command, and also can be changed by using the MEMSW.exe included
with an EPSON Advanced Windows Driver.) The settings of the memory switches are as
follows:

(*1): Effective only in th e s eria l in terface model.
(*2): Effective only in the parallel interface mode l.

Table 2-6 Print Density Selection

Level Print Density Switch No.3 Switch No.4

1

Slightly light

ON ON

2

Normal

OFF OFF

3

Slightly dark

ON OFF

4

Dark

OFF ON

Table 2-7 Operation Mode Selection

Operation mode Switch No.5

Hexadecimal dump ON

Normal

OFF

Table 2-8 Memory Switch 1

SW No. Function

ON (1) OFF (0)

Default setting

1

Reserved



Fixed to OFF OFF(0)

2
3 BUSY condition Receive buffer full Receive buffer full

or offline

ON(1)

4 Receive error Ignored Prints “?” OFF(0) (*1)
5 Auto line feed Always enabled Always disabled OFF(0) (*2)

6 to 8 Rese r ved



Fixed to OFF OFF(0)

Table 2-9Memory Switches 2 to 6

SW No. Function

ON (1) OFF (0)

Default setting

1 to 8

Reserved



Fixed to OFF OFF(0)

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(*1): •Effective only f or the model type with the paper roll supp ly module

•This setting lets the printer tell the paper neare nd by sending the seco ndary pa per ne arend status when the
specified length of paper is fe d aft er the primary paper neare nd se ns o r in th e paper roll supply modu le
detects the paper nearend.

(*2): Effective only when using with the cut sheet presenter module .

Definition of the primary paper nearend and the secondary paper nearend :

•

The primary paper nearend is defined as when the paper nearend sensor in the paper roll supply module detects

the paper roll nearend.

•

The secondary paper nearend is defined as when the paper is fed for the specific length after the primary paper
nearend is detected.
When the primary and the secondary paper nearends are detected, the status from the printer changes. However,
printer controls, such as the printing stop are not affected.

Table 2-10 Memory Switch 7

SW No. Function

ON (1) OFF (0)

Default setting

1

Reserved



Fixed to OFF OFF(0)

2 Setting for the

secondary paper
near-end position

Refer to Table 2-11

OFF(0) (*1)

3

4 Operation after

cutting

Complete ejection Clamp

OFF(0) (*2)

5 Paper initializing

operation when the
power is turned on

Paper edge is
always cut.

Paper edge is
detected.

6 to 8 Rese r ved



Fixed to OFF OFF(0)

Table 2-11 Setting for Paper Nearend Detecting Position

Paper length
(for the time between detecting the
primary paper nearend with the
nearend sensor and sending the status
of the secondary paper near-end)

Memory SW No.7-2 Memory SW No.7-3

Approximately 5 m {196.85"}

OFF OFF

Approximately 10 m {393.70"}

ON OFF

Approximately 20 m {787.40"}

OFF ON

Approximately 30 m {1181.10"}

ON ON

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(*1): Do not set SW 3 to ON in the following condition:

•

The partial cutter is used when the cut sheet pre sent er mo d ule is not used .

When backward paper feeding is enab led , the follo win g pro cess is execut ed .

•

After cutting the paper with a

GS V

command, backward paper feeding is executed. (When the Black

mark sensor is disabled.)

•

The print star ti ng position adju s tment with a

GS (F

command can be set to the backward direction
relative to the cutting position. In this case, the maximum backward correction value is 14 mm {0.55"}
(112 step × 0.125 mm {0.005"} per step).

(*2): Specific offline means the following states.

• Error state except an automatic recovery error state

• Platen open

• Cut sheet presenter module or cover open

• Paper empty
If this switch is turned on, the printer clears the receive buffer when the offline status shown above occurs. Then
the printer executes any real-time command (

DLE ENQ, DLE EOT

) if it is there, and discard s all ot h er da ta.
When the receive buffer is cleared, if this switch is turned on, three bytes of data, 37H, 24H, and 00H, are
transmitted.

Table 2-12 Memory Switch 8

SW No. Function

ON (1) OFF (0)

Default setting

1 to 2

Print control mode

Refer to 2-13 OFF(0)

3 Backward paper

feeding

Enabled Disabled OFF(0) (*1)

4 Autocutter

installation

Not installed Installed OFF(0)

5 Specific offline

operation

Discards receive
data

Keeps receive data OFF(0) (*2)

6 Backward paper

feeding amount

88 steps 108 steps

OFF(0)

7 Test print when the

paper is loaded

Enabled

Disabled

8 Black mark position Initializes the BM

position

Not initialize the BM
position

Table 2-13 Print Control Mode Selection

Default for the print

control mode SW 1 SW 2

Non-divided energi zin g

mode

OFF OFF

Two-part energizing

mode

ON OFF

Four-pa rt energizing

mode

Either ON or OFF ON

2-24 Operation Principles Rev. A

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Rev. A Handling 3-1

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Chapter 3

Handling

Precautions

Transport Precautions

❏ When shipping the printer, use anti-static packing materials.
❏ Remove a paper roll when transporting the EU-T532/T542.
❏ Make sure to close the

paper roll hold unit

of the paper roll supply module, the

platen unit

of the printer module, and the main unit and the

upper frame, cut sheet presenter unit

of

the cut sheet presenter module when transporting.

Carrying Precautions

❏ Hold the

frame, mai n

and the holding the

plate, printer

of the paper roll supply module

when carrying.

Note:

Do not hold parts other than above such as the

holder, paper roll

(or

shaft, paper roll

) or the

roller, paper roll tension

; otherwise the functions may be affected because of damage or

deformation of parts.

❏ When you put this unit on a place such as a desk, be sure to put it on a flat place; otherwise,

the unit may fall down or a malfunction may occur because of deformation of parts.

Figure 3-1 Correct way of holding the EU-T532/T542

holding plate, printe r

frame, main

hole for ground wire

holder, paper roll
(Inside: shaft, paper roll)

roller, paper roll tension

3-2 Handling Rev. A

Confidential

Installation Precautions

❏ When installing the unit, secure firmly four mounting parts at the bottom of the paper roll

supply module to the system side with screws.

❏ Make sure to ground the unit by using the hole for a ground wire. (See Figure 3-1 for the

position.)

Note:

If the system side where the unit is installed is not flat, that could cause deformation of parts and
malfunction. (It is recommended the difference in level is 0.3 mm {0.012"} or less.)

Handling Precautions

Paper roll supply module

❏ Do not apply excessive pressure to the

paper roll hold unit

when opening or closing it;

otherwise, the unit may not open/close properly because of deformation of parts.

❏ Do not touch the light emission or receivi ng surfaces of t he

paper NE detector

, as dirt may

stick to them, or cause damage by static electricity.

Printer module

CAUTION:

Since the thermal head area and the motor surface can become hot right after or
during printing, never touch them with your bare hands; allow about 15 minutes for
them to cool.

❏ Since the EU-T532/T542 contain permanent magnets (in the motor) as well as

electromagnets, they should not be used in an environment with excessive dirt, dust or
metallic dust.

❏ Never print without p ap er inst all ed or wi t h t he head away from the

platen

, because the life

of the

thermal head

may be shortened.

❏ Never pull out the paper (forward or backward) with the head down (against the

platen

).

❏ Do not turn off the power during operations, especially during a cutting operation;

otherwise the cutter blade could be exposed, leaving the

platen un i t

difficult to open.

❏ Since the head heating elements and the driver IC are very delicate, avoid touching them

with any metal objects such as tweezers or screwdrivers.

❏ Open the

platen unit

only when required.

❏ Never touch the surface of the head heating elements and the driver IC, as dirt may stick to

them, affecting the head heating elements or causing damage from static electricity.

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❏ Before handling the

thermal head

, use proper body grounding procedures to avoid

damage from static electricity.

❏ Make sure no dust collects on the thermal paper.
❏ Since the printer uses a line thermal print head, condensation must be avoided. If

condensation occurs, do not turn on the printer until it has disappeared.

❏ Do not apply excessive pressure to the

thermal head

connectors.

❏ An FFC can be replaced only ten times; then you must use a new one.
❏ Do not apply excessive pressure to the

lever, platen

when opening or closing the

platen

unit

with the lever.

Cut sheet presenter module

CAUTION:

Since the paper feed motor and the solenoid surface can become hot af ter print ing for
a long period of time, never touch them with your bare hands; allow about 15 minutes
for them to cool.

❏ Since the EU-T532/T542 contain permanent magnets as well as electromagnet s in the motor

and the solenoid part, they should not be used in an environment with excessive dirt, dust
and metallic dust.

❏ Operate the cut sheet presenter module or the

upper frame, cut shee t presenter unit

only

when required.

❏ Do not turn off the power during operations, since that could cause a paper jam.

Control circuit module

Serial interf ace i s secu re d with inch- ty pe hexa gonal lo ck scr ews for the de fault set ting. I f you u se
millimeter-type screws, replace the inch-type screws with the millimeter-type screws attached to
the

frame, main

for type 1 and 2. (For type 3 and 4, millimeter-type screws are enclosed in the

box.)

Paper roll

❏ Use only the recommended thermal paper because thermal paper contains a high ion

content such as Na, K and Cl may damage the head heating elements.

❏ Avoid heat, humidity, sunlight and solvents, regardless of whether or not the paper has

been used. (Thermal paper gradually darkens at about 70°C {158°F}.)

❏ Remove the installed paper roll when the unit is not used for a long time in a high

temperature, or high humidity condition; otherwise the thermal sensitive materials
contained in the thermal paper may stick to the thermal head area, affecting the printing
quality.

❏ Label sheets are not available for the EU-T532/T542.

3-4 Handling Rev. A

Confidential

Storage Precautions

❏ Do not store the printer in environments with excessive dust, high temperature, high

humidity, or in direct sunlight.

❏ Before storing the EU-T532/T542 for an extended time, remove the paper and wipe off dirt

and dust; then clean parts such as the

platen

and the

thermal head

of the printer module,
rollers of the cut sheet presenter module with alcohol. After the alcohol evaporates, close
each module and store the unit.

Note:

If you leave the printer with the paper installed, discoloration of the paper and stickiness between the
paper and the

platen

may occur. In this case, replace the paper.

❏ Storing the printer for an extended period with the

platen

closed could cause the platen
rubber to deform and result in defective printing. If the platen rubber is deformed, it can be
restored to its proper shape by feeding paper through the printer. Just feed paper through
the printer until the

platen

works properly; then resume printing.

Opening/Closing Units and Modules

Note:

❏

Do not apply excessive pressure to any operation part; otherwise its function may be damaged because
of deformation or damage of the part.

❏ Apply pressure to each operation part only in the specified direction; otherwise its function may be

damaged because of deformation or damage of the part.

Paper Roll Supply Module

Opening/closing the paper roll hold unit (See Figure 3-2. )

1. Lift the

plate, fixed

upward (in t he direction of arrow B) to release th e lock with the

shaft,

paper roll

.

2. Pull the

plate, fixed

in the direction of arrow A to open the unit.

3. To close the unit, push it to the

shaft, paper roll

until it stops. A t this time, make sure that

the

plate, fixed

is securely engaged with the groove on the

shaft, paper roll

. (Make sure

the unit is not open when it is pulled in the direction of arrow A.)

Printer Module

Opening/closing the platen unit (See Figure 3-2.)

1. Turn the

lever, platen

(green lever) of the printer module in the direction of arrow C to

open the unit.

2. To close the unit, turn the

lever, platen

in the direction of arrow D.

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Cut Sheet Presenter Module

Opening/closing the cut sheet presenter module (See Figure 3-2.)

1. Remove the white screw on the opposite side of the mounting dowels.

2. Put your fingers on/around the

seal, paper exit guides

(green stickers) on the

upper

frame, cut sheet presenter unit

and on the

paper exit

; then pull the cut sheet presenter

module in the direction of arrow E to slide it in direction E.

Note:

Be careful with your hand, as the module is pulled in the direction of arrow F with spring.

3. Pull the module further until the mounting dowels on the module are disengaged; then the
module is turned dow n ward and opened.

4. To put the module back to the pr evious posi tion, li ft up the bott om of the

paper exit

. At this
time, make sure that the mounting dowels (both on the right and le ft sides) are securely
engaged with the mounting parts on the module.

Opening/closing th e upper frame, cut sh eet presenter unit ( Se e Figure 3-2.)

1. Turn the

lever, clamp

in the direction of arrow G to open the unit. You can operate either

lever on the right or the left.

2. To close the unit, turn the

lever, clamp

in the direction of arrow H. At this time, make sure

that the

lever, clamp

is properly engaged with the

shaft, clamp lever

.

Note:

Do not lift the

upper paper gui de

when the

upper frame, cut sheet presenter unit

is

closed.

Figure 3-2 Opening/closing units and module

holder, paper roll
(Inside: shaft, paper roll)

plate, fixed

paper roll hold unit

lever, platen

cut sheet presenter module

mounting dowels

upper frame, cut sheet
presenter unit

upper paper guide

lever, clamp

A

B

C

D

F

E

G

H

paper exit

seal, paper exit guide

white screw side

3-6 Handling Rev. A

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Loading/Removing Paper

Loading Paper

See the sticker on the

paper roll hold unit

for the paper loading.

Figure 3-3 Paper loading display on sticker

Note:

Use only the paper specified in the EU-T532 and the EU-T542 specifications issued by Seiko Epson
Corporation.

Loading paper for the paper roll supply module

Follow the steps below to load the paper for the paper roll supply module.

1. Lift the

plate, fixed

upward to release the lock with the

shaft, paper roll

.

2. Open the

paper roll hold unit

.

3. Attach a

holder, paper roll

which meets the inside diameter of the paper core to the

shaft,

paper roll

; then secure it with a C-ring.

Note:

At the default setting, the

holder, paper roll A

(for the inner diameter of the paper core is 25.4 mm

{1"}) is attached to the paper roll supply module. Since two holders, the

holder, paper roll B

(if the

inner diameter of the paper core is 50.8 mm {2"}), and the

holder, paper roll C

(if the inner

diameter of the paper core is 76.2 mm {3"}), are also packed in the box, use the appropriate

holder,

paper roll

that meets your paper core size.

4. Load the paper roll to th e

holder, paper roll

with the printing surface of the paper facing

upwards.

5. Close the

paper roll hold unit

to secure the paper roll. At this time, make sure that the

plate, fixed

is securely engaged with the

shaft, paper roll

.

plate, fixed

paper roll hold unit

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Loading paper for printer module

Follow the steps below to load the paper for the printer module from the paper roll supply
module.

1. Cut the edge of the paper as shown in Figure 3-4.

Figure 3-4 Shape of paper edge

2. Pull out the paper and pass it under the

roller, paper roll tension

.

3. After inserting the paper edge straight into the paper slot of the printer module so that the
paper is along the upper side of the

plate, lower paper guide

, push the paper w ith your

hand.

4. When the inserted paper is detect ed by the

paper-end detector

of the printer module, the

paper is fed automatically in the semi-autoloading mode.

5. When the semi-autoloading is finished, the extra paper is automatically cut.

6. Remove the extra paper from the

paper exit

.

Note:

• Performing operations other than above can cause improper paper feeding and jamming.

• Make sure that the paper is not wrinkled or torn.

• To avoid paper jams, do not fold the edge of the paper.

• Paper curled in the opposite direction from the paper entrance might be difficult to insert.

• If the paper is not inserted at a right angle, paper jams or paper folding may occur. In this case,

open the

platen unit

, and load the paper properly after removing a paper jam.

• Do not apply excessive pressure to the

shaft, paper roll

; otherwise the

paper roll hold unit

may not open/close properly because of deformation or damage of the shaft.

3-8 Handling Rev. A

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Removing Paper

Follow the steps below to remove the paper roll.

Removing pape r u sing command

While the printer is online, the paper can be removed using a

FS ( z

command. Using this

command, the paper is fed in the reverse direction and detached from the

platen

; then you can

pull the paper backward and remove it.

Manual paper re moving

1. Turn the

lever, platen

to open the

platen unit

. (See “Opening/Closing the platen unit” on

page 3-4.)

2. Pull out the paper from the paper slot of the printer module.

3. Open the

paper hold unit

of the paper roll supply module and remove the paper roll from

the

shaft, paper roll

.

Note:

Do not apply excessive pressure to the

shaft, paper roll

; otherwise the

paper roll hold unit

may

not open or close properly because of deformation or damage of the shaft.

Removing Jammed Paper

CAUTION:

Since the thermal head area and the paper feed motor surface of the printer module
and the paper feed motor surface of the cut sheet presenter module can become hot
right after printing, never touch them with your bare hands; allow about 15 minutes for
them to cool.

Note:

❏

Never pull the paper out with the

platen unit

of the printer module or the

upper frame, cut

sheet presenter unit

of the cut sheet presenter module down.

❏

When using tools such as tweezers to remove paper pieces, avoid touching the head heating elements
or the elements of each paper detector with them.

Removing Jammed Paper in the Cut Sheet Presenter Module

Open the

upper frame, cut sheet presenter unit

or the cut sheet presenter module, and

remove a paper jam. (See “Opening/Closing Units and Module” on page 3-4.)

Removing Jammed Paper in the Printer Module

1. Open the cut sheet presenter module.

2. Turn the

lever, platen

to open the

platen unit

and remove a paper jam. (See “Opening/

Closing Units and Module” on page 3-4.)

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Paper NE Detector Setting

This detector is mounted on the

paper roll tension unit

of the paper roll supply module. By
adjusting the position of the detecto r, the detecto r can detect the amou nt remaining on the pape r
roll at the setting value. At the default setting, the amount remaining is set to be about 5 m
{196.85"} when the pape r ti p is d etected , and when u sin g the pape r which has 25. 4 mm {1"} inne r
diameter of the core, 33.4 mm {1.3"} outer diameter of the core and the 65 µm paper thickness.
When you want to change the setting, follow the steps below.

1. If the paper is loaded, open the

paper roll hold unit

, and remove the paper roll. (See

“Removing Paper” on page 3-8.)

2. Loosen the

screw, NE detector

so that the

paper NE detector

can be moved in the

direction of arrow.

3. Tighten the

paper NE detector

with the

screw, NE detector

at the given fixing hole for

the

paper NE detector

. For further adjustment, use the

paper NE detector

fixing groove.

The hole numbers for the

paper NE detector

fixing hole and the paper roll diameters

detected by the

paper NE detector

are as fol l ows:

Note:

❏

Because the amount remaining on the paper roll will vary with the paper types (thickness), mak e sure
to check before setting.

❏

Do not touch the light emission or receiving surfaces of the

paper NE detector

with your hands or

any objects since dirt may stick to them, or cause damage by static electricity.

Figure 3-5 Setting of the paper NE detector

Table 3-1 Setting of the Paper NE Detector

Hole No. 1 Hole No. 2 Hole No.3 Hole No.4 Hole No. 5 Hole No. 6 Hole No. 7

Detected paper diameter 45 mm

{1.77"}

50 mm

{1.97"}

60 mm

{2.36"}

70 mm

{2.76"}

80 mm

{3.15"}

90 mm

{3.54"}

100 mm

{3.94"}

paper NE fixing hole

paper NE fixing groove

paper NE detector

screw, paper NE detector

1

2

3

4

5

6

7

3-10 Handling Rev. A

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Self Test

The EU-T532/542 have self test functions. Follow the steps below to perform the self tests.

Performing the Self Test

1. Loosen two screws to remove the

cover, circuit board B

.

Figure 3-6 Performing the self test

2. With the paper loaded, turn on the power while holding down the paper feed switch on the
circuit board. (If the power is already on, turn it off first before performing th e self test with
the paper loaded.)

3. The current printer status is printed.

4. When the printing is complete, the message, “Self test printing, please press
FEED button,” is printed; then the PAPER OUT LED starts to flash.

5. Press the paper feed button again while the PAPER OUT LED is flashing; then the printing
(for the test pattern printing) is resumed .

Self Test End

1. After a number of lines are printed, the message, ***completed***, is printed at the end
of the self test; then the unit enters the nor mal op erat io nal mode, with al l set ti ngs initialized.

2. When the self test is completed, attach the

cover, circuit board B

with screws.

Note:

During the self test, check each LED on the circuit board. If an error occurs during the self test, see the
following section and “Troubleshooting” in Chapter 5 for details.

cover, circuit board B

screws

paper feed switch
(See also Figure 3-7.)

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Errors

LED Display

The control circuit board module has three LEDs: the POWER LED for power supply error, the
PAPER OUT LED for paper-out error and the ERROR LED for various k ind of err ors. For r ecovery

from errors, see “Troubleshooting” in Chapter 5.

Figure 3-7 LED positions

POWER LED (Power Supply Error): Green

When the POWER LED is lit, the power is supplied. The LED indicates the following:.

Table 4-4 POWER LED Error

Error type LED flashing pattern Cause

Power supply error Not lit

The power supply connector is unplu gg ed .
The fuse (F1) is blown out.

POWER LED

PAPER OUT LED

ERROR LED

PAPER FEED switch

3-12 Handling Rev. A

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PAPER OUT LED (Paper-End Error): Red

When the PAPER OUT LED is not lit, the paper roll has enough paper on it. The LED indicates the
following:

ERROR LED (Error): Red

ERROR LED has three error types: the automatic recovery error, the possible recovery error, and
the recovery impossible error. The LED indicates the following:

Automatic recovery error

Note:

The high temperature error of the print head is not an abnormality. When the head is cooled down to 60

°

C

or less, the unit recovers automatically.

Table 4-5 PAPER OUT LED Error

Error type LED flashing pattern Cause

Paper-end error Lit

•

The amount of remainin g on the pa per roll is l it tl e, or

no paper is loaded.

• Α

paper jam occurs around the detec to r.

•

Detector failure has occurred.

•

The connector of the detector is unplugg e d.

Waiting for self test
printing to be continued
or macro execution
ready state

Flashing

Self test printing is in th e rea dy st at e du rin g sel f test .

Table 4-6 Automatic recovery error

Error type LED flashing pattern Cause

Print head high
temperature error

The head temperature has reached at 70°C or more.

Approx. 320 ms

→

Approx. 320 ms

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Possible recovery erro r

Recovery impossible error

Note:

When any error shown above occurs, turn off the power as soon as possible.

Table 4-7 Possible Recover Error

Error type LED flashing pattern Cause

Platen open error Platen unit is open during printing.

Autocutter error Autocutter malfunction

Black mark sensor
detection error

No black mark is detected even after a certai n am o un t
of paper with black mark is fed.

Presenter error A paper jam has been detected in the cut sheet

presenter module.

Table 4-8 Impossible recover error

Error type LED flashing pattern Cause

CPU execution error The CPU executes an incorrect address.

R/W error in
memory or G/A

After R/W checking, the printer does not work correctly.

High voltage error The power supply voltage is extremely high .

Low voltage error The power supply voltage is extremely low.

PCB connection
error

The printer is not connected or the head wiring is
disconnected.

Approx. 5.12 s

Approx. 320 ms

Approx. 320 ms

Approx. 5.12 s

Approx. 5.12 s

Approx. 5.12 s

Approx. 320 ms

Approx. 5.12 s

3-14 Handling Rev. A

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Rev. A Maintenance 4-1

EU-T532/T542 Technical Manual

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Chapter 4

Maintenance

To keep the printer in peak working condition, extend its life for a long term and prevent
operational failures, follow the maintenance procedures below.

Cleaning

CAUTION:

• Never clean the thermal head with solvents other than the specified ones, since
other solvents could damage the thermal head or cause the malfunction of
parts.

• Since the head area and each motor surface can become hot right after
printing, allow about 15 minutes for them to cool.

Thermal Head Cleaning

The head heating elements of the printer modul e will collect dust aft er printing for a lon g period
of time because of heat sensitive materials contained in the paper, that could affect printing
quality. In this case, clean the thermal head using the steps below.

1. Turn off the power.

2. Open the cut sheet presenter module. (See “Opening/Closing Units and Modules” on page
3-4.)

3. Open the

platen unit

using the

lever, platen

, and remove the paper.

4. Wipe off the dust on the head heating elements usi ng a cotton swab dampened with alcohol
solvent, such as ethanol, or IPA.

Figure 4-1 Thermal head cleaning

5. After the alcohol evaporates completely, turn the

lever, platen

or push the

push plate,

platen B

to close the

platen unit

.

head heating elemen ts

cotton swab

lever, platen

push plate, platen B

4-2 Maintenance Rev. A

Confidential

Removing Stains (Except for the Thermal Head)

The areas where the paper is fed will be stained or collect dust after printing for a long time
because of paper dust and heat sensitive materials contained in the paper. Especially, if paper
feed rollers, the platen, or the paper detectors are not clean, a malfuncion of paper feeding or
paper detection may occur. In this case, wipe off stains with alcohol.

CAUTION:

Never use thinner, benzine, t richl oroethylene, or ketone group solv ents, si nce they could
damage rubber and plastic parts or cause them to deteriorate.

Removing Dirt and Dust

Use an electronic vacuum cleaner to remove dirt and dust. After cleaning, check the lubrication
point and lubricate when necessary.

Note:

When opening the units and cleaning them, be sure not to damage parts and paper detectors, disconnect
wires, or unplug connectors.

Removing Foreign Matter When the Cutter Locks

Follow the procedures below to remove foreign matter when the cutter of the printer module
locks.

After rotating the

motor

in reverse so that th e

movable cutter blade, full, H

returns to the

home position, shut off the current to the

motor

; then remove any foreign matter. (See Figure

2-20 on page 14 in Chapter 2 for checking the home position.)

If the

movable cutter blade, full, H

fails to return to the home position even after executing

the above procedure, follow the steps below.

1. Shut off the current to the

motor

.

2. Rotate the knob on the

gear, cutter w o rm, H

with a tool, such as tweezers, so that the

movable cutter blade, full, H

returns to the home position; then remove the foreign

matter.

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Inspection

The maintenance and inspection procedures for the printer fall into two categories. One is
“Daily checks” for the printer user, and the other is “Periodic checks” for someone with more
technical knowledge. Maintenance and inspect ion procedures should be carri ed out by properly
qualified personnel.

Daily Checks

Make sure the printer is used properly and kept in good repair. If there are any problems,
replace the printer. The check items are as follows:

Periodic Checks

Every six months, check the items listed in the table below. If there are any problems, correct
them using procedures in the table blow.

Table 4-1 Daily Checks

Check item Standard Procedure

Setup status No cables or connectors are

disconnected.

Connect the cables or connectors

properly.
Paper roll is loaded properly. Load the paper properly.
No unit of each modules is open.

(the paper roll hold unit, the platen unit,
the upper frame, cut sheet presenter unit,
the cover, circuit board B, and etc.)

Close the units.

Paper chips or foreign
matter inside the
product

No paper chips or for eign matter is in side
the product

Remove paper ch ips or foreign matter.

Paper state Specified paper is used. Replace with the specified paper

No discolored or torn paper is used. Replace with a new paper roll.

Table 4-2 Periodic Checks

Check item Standard Procedure

Dust, fuzz or dirt sticking
to various parts

• No dirt or dust is attached or collected in
the paper path.

• Remove dust, fuzz, or dirt with a vaccum
cleaner.

• No paper chips or foreign matter
is in the areas such as around the
thermal head heating elements, the
cutter, gears, detectors, and insi de the
paper path.

• Wipe off dirt and dus t with alc o h ol .

• Remove foreign matter or paper chips.

• Wipe off paper chips on th e pla te n

surface with alcohol when the surface is
accumulated with paper chips.

Lubrication stat u s Lubri c at io n is sa ti s fac t ory . Lubricate the lubric at io n points if

required.

Operating status

• Printing, paper feeding and issuing
operation s perform properly.

• No abnormal sound

• All other functions perform properly and

parts are not deformed or worn.

See “Troubleshooting” on page 5-2.

4-4 Maintenance Rev. A

Confidential

Lubrication

Lubrication is particularly important in keeping the printer operating properly as long as
possible. Therefore, lubricate at prescribed intervals, using the correct lubricants.

Lubricant

The performance and durability of the printer are greatly affected by the lubricant applied.
Therefore, pay careful attention to lubricant specifications, especially for the low temperature
characteristics. The lubricants for t he printer are chosen based on tec hnica l in fo rmat ion ana lysis
and tests on various lubricants by EPSON. The lubricants are available in 40 cc (gr.) plastic
containers (the minimum supply unit). Both G-36 and G-15 are used on this printer.

Lubrication Standards

Lubricate the printer in the following situations:

❏ Lubricant is wiped off during cleaning.
❏ Lubricant is wiped off when disassembly or assembly is performed.

When lubricating parts during assembly of the printer, clean parts before lubricating them.
Refer to the next section and “Lubrication Diagram” at the end of this manual for the lubricants

and the lubrication points .

Lubrication Point

The lubrication points are as follows:

Table 4-2 Lubrication Point

Module Number Lubrication point

Lubrication

type Amount of lubricant

Printer
module

1 Two points where the screw on the

lock lever

is

secured

G-15 1 mm-diameter

lubricant

2 to 7 The seven points where the gears on the

autocutter

are engaged with other parts.

G-36 Appropriate quantity

8 The oval hole on the

movable cutter blade

(Two points)

G-15 1 mm-diameter

lubricant

9 The two points where the

cutter frame

contact the

fixed blade

.

G-15 1 mm-diameter

lubricant

10 The two points where the shaft of the

movable

cutter blade

rotates.

G-15 Appropriate quantity

11 The dowels where the platen unit rotates. G-36 Until the dow els are

covered.

12 The points where the

frame assembly

contact the

lock lever assembly

.

G-15 1 mm-diameter

lubricant

Rev. A Maintenance 4-5

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Note: The lubrication point numbers in the table are the same as those in the lubrication diagrams at the end of this manual.

Lubricant List

Tools

Paper roll

supply

module

13 Two contact points where the paper roll hold un it

turns

G-36 Appropriate quantity

14 Contact point where the paper roll tension turns G-36 Appropriate quantity

Cut sheet

presenter

module

15 Two points where the cut sheet presenter module

turns

G-36 Appropriate quantity

16 Two points where the upper frame, cut sheet

presenter unit turns

G-36 Appropriate quantity

Table 4-3 Lubricant List

Type Name Quantity Commercial availability

Grease

G-15 40 gr

Epson exclusive product

Grease G-36 40 gr

Table 4-4 Tool List

Tool name Commercial availability

Brush #1 Yes
Cleaning brush Yes
Crosshead screwdriver #0, 1 and 2 Yes

ET holder No. 1.5, 2, 2.5, 3, 3.5 and 4

Yes
Tweezers Yes
Diagonal cutting nippers

Yes
Pliers

Yes
Electric solder iron

Yes
Wrist band

Yes

Table 4-5 Measuring Equipment List

Name Standard

Multimeter DC vol ta ge: 400 V max.

Resistanc e: measurable

Oscilloscope 500 MHz with storage

Table 4-2 Lubrication Point

Module Number L ubrication point

Lubrication

type Amount of lubricant

4-6 Maintenance Rev. A

Confidential

Rev. A Repair 5-1

EU-T532/T542 Technical Manual

Confidential

Chapter 5

Repair

Repairs are divided into two levels (A and B) in consideration of the degree of difficulty of
repair. The person who repairs the printer should perform the proper repair procedures,
depending on the individual technical knowledge and skills.

Repair Levels

Repair Procedure

When problems occur, check the condition of the printer and locate the cause of the problem as
outlined in “Troubleshooting Table.” Then repair the unit properly. The table consists of the
following five sections.

Level A: Requires general knowledge of the printer’s operation

principles and structure but does not require specialized
experience.

Level B: Requires a certain degree of knowledge of the printer’s

operating principles and structure as well as skills and
experience using special tools for disassembly and assembly
of the printe r.

Phenomenon Find the type of problem in this column.
Condition Check the condition of malfunction by referring to this

column.

Cause Locate the cause of the problem by referring to this column.

Also, the repair level is indicated for each cause; use this
indicatio n to determine the method of repair.

Where/ how to check The mechanisms that may cause problems as well as

checkpoints are listed in this column. Check the unit as
outlined in this column to locate the malfunctioning section.

Procedure Repair malfunctioning sections as indicated in this column. If

the same problem or phenomenon reoccurs af ter the specified
repair is performed, check other items in t he “Cause” col umn
and repair the unit again.

5-2 Repair Rev. A

Confidential

Troubleshooting

Use troubleshooting procedures in the table below when problems occur.

Table 5-1 Troubleshooting

Phenomenon Condition Cause Level Where/how to check Procedure

No
performance

Power (24 V) is
not supplied

Power connector is
disconnected.

A See if the power

connector is
connected properly.

Connect the power
connector again.

POWER LED is not
lit.

Fuse (F1) is blown.

B Check with a tester if

the fuse (F1) on the
control circuit board is
conductive.

•Replace the blow n
fuse.

•Replace the
control circuit
board if there is no
recovery after the
fuse replacement.

PAPER OUT LED
is lit.

Paper out error (1) Paper is not

loaded in the
printer.

A Check if the paper is

loaded.

Load the paper in
the printer.

(2)Only a small

amount
remaining on

the paper roll
(paper NE
detected)

A Check the amount of

the paper remaining in
the paper supply
module.

Replace the paper
roll if only a small
amount of the
paper remaining is
left.

PAPER OUT LED
is not lit even
when the
paper is out.

Paper detector
failure

(1)Paper chips or

foreign matter is
jammed around
the paper
detector.

A

Check whether paper
chips or foreign matter
is jammed around the
paper detector.

Remove the paper
chips or foreign
matter if there is
any.

(2)Paper chips or

foreign matter is
jammed around
the paper NE
detector.

A

Check whether paper
chips or foreign matter
is jammed around the
paper NE detector.

Remove the paper
chips or foreign
matter if there is
any.

PAPER OUT LED
is lit even when
the paper is not
out.

Paper detector
failure

(1) Paper NE

connector is

disconnected.

A

Check if the paper NE
detector is connected
properly.

Connect the
connector properly
if it is disconne cted.

(2)Paper NE

detector is
damaged.

B Che ck the paper NE

detector function with
an oscilloscope.

Replace the paper
NE detector if it is
damaged.

(3)Paper detector is

disconnected .

A Check if the paper

detector is connected
properly.

Connect the
connector properly
if it is disconne cted.

(4)Printer detector

is damaged.

B Check the paper

detector function with
an oscilloscope.

Replace the paper
detector if it is
damaged.

(5)Printer FFC is

disconnected.

A Check if the printer FFC

is connected properly.

Connect the FFC if it
is disconnected.

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PAPER OUT LED
is flashing.

Self test standby
state

Self test is in the
standby state

A Check if the self test

printing is completed.

Press paper feeding
SW on the control
circuit board to
complete the self
test when not
completed.

ERROR LED is
flashing.
(For the LED
flashing
patterns , see
“Error LED” on
page 3-12.)

Print head high
temperature
error

The head
temperature has
reached at 70°C or
more.

A −

−

(When the head is
cooled down to
60°C or less, the unit
will recover
automatica lly .)

ERROR LED is
flashing
(For the LED
flashing
patterns , see
“Error LED” on
page 3-12.)

Platen open error The platen is open . A

Check if the platen is
not open.

Close the platen
when it is open.

Platen open is
not detected.

The platen open
detector is
damaged.

B Check the platen ope n

detector function with
an oscilloscope.

Replace the
detector if it is
damaged.

Autocutter error (1)Paper chips or

foreign matter is
inside the
autocutter and
has locked it.

B Check whether paper

chips or foreign matter
is jammed inside th e
autocutter.

After turning off the
power, remove
paper chips or
foreign matter; then
turn on the power.

(2)The internal

function of the
autocutter is
damaged.

B Check the power

supply voltage.

Replace the
autocutter if the
power supply
voltage is normal.

Black mark
detection error

(1)No black mark is

printed.

A Check if the paper is

printed with a black
mark.

Replace with the
black mark printed
paper.

(2)The wrong side

of the paper is
used.

A Check if the correct

side of the paper is
used.

Replace with the
paper with the
black mark on the
correct side.

(3)The black mark

detector is
damaged.

B Check the black mark

detector function with
an oscilloscope.

Replace the
detector if it is
damaged.

(4)Paper chips or

foreign matter is
jammed around
the black mark
detector.

A

Check whether paper
chips or foreign matter
is jammed around the
black mark detec t or.

Remove the paper
chips or foreign
matter if there is
any.

Table 5-1 Troubleshooting

Phenomenon Condition Cause Level Where/how to check Procedure

5-4 Repair Rev. A

Confidential

Printing
operation does
not work.

Nothing is
printed.

(1) The head FFC

connection
failure

A Check whether the

head FFC is connected
properly.

Connect the head
FFC properly.

(2)The head FFC

signal line is
broken.

A See or check wi th an

oscilloscope whether
there is damage or
break of the head FFC.

Replace the head
FFC if it is broken.

(3)Head input pulse

failure

B

Check with an
oscilloscope whether
the input pulse is within
the specified range.

If the input pulse is
abnormal , re pla c e
the control circuit
module.

(4)Head failure

(Dr.IC, etc.)

B

If the input pulse is
normal, replace the
thermal head.

Dots are missing
continuously.

(1)Foreign matter is

attached to the
head heating
elements

A

See if anything is wrong
with the head heating
elements

Clean the head
heating elements if
foreign matter
attached.

(2)The head

heating
elements are
damaged.

A Replace the thermal

(3)Head failure

(Dr.IC, etc.)

B

Check with an oscillo­scope if the inpu t pulse
is within the specified
range.

If the input pulse is
normal, replace the
thermal head.

Dots are missing
occasionally.

(1)Foreign matter

is on the surface
of the platen.

A Check the surface of

the plate n with an
oscilloscope or a
magnifier.

Clean the surface of
the platen if foreign
matter is attached
to it.

(2)The platen

surface is
deformed.

A

Replace the platen
if there is any
damage on the
platen surface.

Table 5-1 Troubleshooting

Phenomenon Condition Cause Level Where/how to check Procedure

Rev. A Repair 5-5

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Printing is faint. All printing color is

faint.

Printing dens ity
setting is set to light.
(The color sensitiv ity
difference
depending on the
paper)

B •Check the printing

density setting of the
control circuit module.

•Check if the specifie d
paper is used.

Change the setting
of the printing
density to darken.

All or some part
of printing is faint.

(1)Dirt or foreign

matter attaches
to the head
heating
elements.

A See or check the head

heating elements with
a magnifier.

Clean the head
heating elements if
foreign matter is
attached to the
elements.

(2)Thermal

sensitivity has
deteriorated
due to paper
deterioration

A Check whether the

paper has
deteriorated.

Replace the
deteriorated paper.

(3)Therma l head
heating

elements are
defective.

B Check the surface of

the thermal head with
a magnifier.

Replace the thermal
head.

Printing is partly
faint.

Damage or
deformation of th e
platen surface

A See or check with a

magnifier the platen
surface.

Replace the platen
if the platen surface
is damaged or
deformed.

Abnormal or
incorrect
printing

Abnormal or
incorrect printing

(1)Thermal head
input pulse
failure

B

Check with an oscillo­scope if t h e input pul se
is within the specified
range.

If the input pulse is
abnormal, replace
the control circuit
board.

(2)Therma l head

failure
(Dr.IC, etc.)

B

If input pulse is
normal, replace the
thermal head.

Paper cannot
be inserted.

Paper cannot be
inserted into the
printer module.

(1)Paper chips or

foreign matter is
in the paper
guide of the
printer module.

A Check whether pa per

chips or foreign matter
is inside the paper
guide.

Remove paper
chips or foreign
matter if th ere is
any.

(2)Paper detector

on the paper
guide of the
printer module i s
defective.

B Check if the detector

operates properly.

•Remove paper
chip or foreign
matter if the re is
any.

•Replace the
detector if it is
damaged.

(3)The shape of the

paper edge is
not like the

specified one.

A Check if the paper

edge is cut properly.

Cut the paper edge
properly.

Table 5-1 Troubleshooting

Phenomenon Condition Cause Level Where/how to check Procedure

5-6 Repair Rev. A

Confidential

Paper is not
fed.

Paper is not fed
smoothly.

(1)The paper roll

supply module
does not
oscillate
properly.

B Check if the paper is

pulled out smoothly.
(The paper tension
loading should be les s
than the rating value.)

•Load the paper
properly.

•Replace the paper
roll supply module if
the oscillation
loading of the
paper supply
module is
excessive.

(2) The paper size is
not correct.

A Check the paper

diameter, width, and
thickness.

Use the specified
paper.

Paper is not fed.

(1)Abnormal input

signal or paper
feed motor
failure

B Check the power

supply voltage, input
signal, and operation
of each paper feed
motor.

•Replace the
control circuit
board module if
there is any
problem with the
power supply
voltage, input
signal.

•Replace the motor
if there is any
problem with the
motor operation.

(2)The paper feed

connector is
disconnected.

A

Check if the each
paper feed motor is
connected properly.

Connect the
connector properly.

(3)Power

transmission parts
(gears) are
damaged, or
foreign matter is
caught between
gears.

B

•Check the power
transmission state of
each gears.

•Check if no foreign
matter is caught
between geas.

•Replace damaged
gears.

•Remove foreign
matter if there is
any.

Table 5-1 Troubleshooting

Phenomenon Condition Cause Level Where/how to check Procedure

Rev. A Repair 5-7

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Confidential

Paper feeding
pitch is
defective.

The character
spacing is not
uniform.

(1)The paper roll

supply module
does not
oscillate
properly.

B Check if the paper is

pulled out smoothly.
(The paper tension
loading should be les s
than the rating value.)

•Load the paper
properly.

•Replace the paper
roll supply module if
the oscillation
load of the paper
supply module is
excessive.

(2)Power

transmission parts
(gears) are
damaged, or
foreign matter is
caught between
gears.

B

•Check the power
transmission state of
each gears.

•Check if no foreign
matter is caught
between gears.

•Remove foreign
matter if th ere is
any.

•Replace damaged
gears .

(3)Abnormal input

signal or paper
feed motor
failure

B Check the power

supply voltage, input
signal, and operation
of each paper feed
motor.

•Replace the
control circuit
board module if
there is any
problem with the
power supply
voltage, input
signal.

•Replace the motor
if there is any
problem with the
motor operation.

(4)Paper feed slip

due to the
platen wear and
paper powder

B Check the fric tion force

of the platen surface.

•Clean the platen if
paper powder
accumulates o n it .

•Replace the platen
if it is worn out.

(5)Operation failure

of the paper roll
tension unit

B Check if the unit moves

smoothly.

If it does not
operate properly,
replace the paper
roll tension unit.

Paper can not
be cut.

Paper is not cut
automatically.

(1)Foreign matter

inside the
autocutter

A Check whether foreign

matter is inside the
autocutter.

Remove foreign
matter if there is
any.

(2)Abnormal input

signal or inner
mechanism
damage of the
autocutter

B Check the power

supply voltage, input
signal, and operation
of the cutter motor.

•Replace the
control circuit
board module if
there is any
problem with the
power supply
voltage, input
signal.

•Replace the motor

if there is any
problem with the
autocutting
operation.

Table 5-1 Troubleshooting

Phenomenon Condition Cause Level Where/how to check Procedure

5-8 Repair Rev. A

Confidential

Platen unit can
not open/
close.

Platen unit does
not open.

The cutter blade is
not in the home
position.

B Check if the cutter

blade is in the home
position.

Turn the knob to
return the cutter
blade to the home
position.

Platen unit does
not close.

Foreign matter
inside the printer.

A Check whether foreign

matter is inside the
printer.

Remove foreign
matter if there is
any.

Upper frame,
cut sheet
presenter unit
can not open/
close.

Upper frame, cut
sheet presenter
unit can not
open/close.

Foreign matter
inside the cut sheet
presenter module

A Check whether foreign

matter is inside the cut
sheet presenter
module.

Remove foreign
matter if there is
any.

Table 5-1 Troubleshooting

Phenomenon Condition Cause Level Where/how to check Procedure

Rev. A Assembly and Disassembly 6-1

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Chapter 6

Assembly and Disassembly

Small Parts Abbreviation

All small parts are represented by the abbreviations listed below.

Assembly

❏ Only assembly steps for the printer module are in this section. For assembly steps for other

modules, follow the disassembly procedures in “Disassembly” in reverse sequence. Also,
see <Reassembly Point> in “Disassembly procedure” while assembling.

❏ Perform assembly while referring to the component shapes and mounting positions shown

in the exploded diagrams at the end of this manual.

❏ The ★ symbols in the “Reassembly step” indicate places where checks are required. Make

sure to follow the instructions given in these places.

❏ Circled numbers in the “Reassembly step” indicate that lubrication is required during the

reassembly of that component and that such lubrication will be difficult unless performed
during reassembly.

❏ Refer to “Lubric ation” in Chap ter 4 for lubrication details on th e printer module and other

modules. Also, see the lubrication diagrams at the end of this manual for the places to
lubricate.

Table 6-1 Small Parts Abbreviations

Abbreviation Part name

R.E Retaining rin g E -ty pe
C-ring Crescent ring
C.B. (M2 × 2.5) Cross-recessed binding head screw, 2 × 2.5, F/Zn
C.B. (M2.3 × 3) Cross-recessed binding head screw, 2.3 × 3, F/Zn
C.B. (M2.5 × 4) Cross-recessed binding head screw, 2.5 × 4, F/Zn
C.B. (M3 × 4) Cross-recessed binding head screw, 3 × 4, F/Zn
C.B. (M3 × 6) Cross-recessed binding head screw, 3 × 6, F/Zn
C.P. (M1.6 × 5) Cross-recessed pan head screw, 1.6 × 5, F/Zn
C.P (P2) Cross-recessed pan head (S-P1) screw, 3 × 6, F/Zn
C.B.B-tite (M2 × 6) Cross-resessed binding head B-tite self tapping screw, 2 × 6, F/Zn
C.B.S-tite (M2.5 × 4) Cross-recessed binding head S-tite self tapping screw, 2.5 × 4, F/Zn
C.B.S-tite (M3 × 5) Cross-recessed binding head S-tite, 3 × 5, F/Zn
C.C.P-tite (M2.5 × 6) Cross-resesse d cup head P-tite self tapping screw, 2.5 × 6, F/Zn
C. P-tite. F screw (M2 × 3) Cross-recessed P-tite self tapping flat end screw, 2 × 3, F/Ni

6-2 Assembly and Disassembly Rev. A

Confidential

Pre-assembly A Paper guide,straight, back unit

Reassembly

step

Part name Assembly procedure

1

Paper detector assembly

2

Paper guide, straight, back

(for the EU-T532)

*For the EU-T542, attach the

Paper guide, straight,
back, B

.

❏

Slide the

paper detector assembly

onto the

paper guide, straight, back

*.

★

<Check>

❏

Make sure that the

paper detector asse mbly

is installed securely, as shown

below.

paper detector
assembly

paper guide, straight, back

Install securely.

Rev. A Assembly and Disassembly 6-3

EU-T532/T542 Technical Manual

Confidential

Pre-assembly B Frame, platen, straight unit

Reassembly

step

Part name Assembly procedure

1

Frame, platen

2

Lock lever assembly
C.B.B-tite (M2

×

× ×

×

6)

× 1

❏

Install the

lock lever assembly

on the

frame, platen

, and secure it with a

screw.

★

<Check>

❏

Tightening torque: 294 to 343 mN•m {3.0 to 3.5 kg•cm}

❏

Make sure that the screw does not skew during tightening.

3

Cover, fixed blade

4

Fixed blade, H

❏

Install the

cover, fixed blade

and the

fixed blade, H

on the

frame, platen

;

then secure them with

shouldec

s.

5

Spring, fixed blade
Shouldec (2

×

× ×

× 6 ×

× ×

× 2) × 2

At this time, inst al l the

spring, fixed blade

on one of the

shouldec

s, as

shown below.

★

<Check>

❏

Tightening torque: 147 to 196 mN•m {1.5 to 2.0 kg•cm}

❏

Make sure to install the

fixed blade, H

right-side-up.

❏

Make sure that the dowels on the

frame, platen

fit securely into the holes

on the

cover, fixed blade

.

❏

Make sure to install the

spring, fixed blade

in the correct position.

C.B.B-tite (M2 × 6)

lock lever assembly

frame, platen

shouldecs

spring, fix e d blade

fixed blade

mounting dowels

cover, fixed blade, H

frame, platen

6-4 Assembly and Disassembly Rev. A

Confidential

Pre-assembly B

Reassembly

step

Part name Assembly pr oc edure

6

Push plate, platen, B
C.C.P-tite (M2.5

×

× ×

×

6)

× 1

❏

Install th e

push plate, platen, B

to the

frame, platen

and secure it with a

screw.

★

<Check>

❏

Tightening torque: 392 to 490 mN•m {4 to 5 kg•cm}

7

Spring, lock lever

❏

Hook the ends of t he

spring, lock lever

onto the

lock lever assembly

and

C.B.B-tite (M2

×

× ×

×

6)

from the inside of the

frame, platen

.

★

<Check>

❏

Make sure that the

spring, lock lever

is hooked securely.

push plate, platen, B

frame, platen

C.C.P-tite (M2.5 × 6)

C.B.B-tite (M2 × 6)

spring, lock leve r

lock lever assembly

frame, platen

Rev. A Assembly and Disassembly 6-5

EU-T532/T542 Technical Manual

Confidential

Pre-assembly B

Reassembly

step

Part name Assembly pr oc edure

8

Platen, straight assembly

9

⑩

Bearing, platen
R.E. (2.5)

× 1

❏

After Installing the

platen, straight assembly

to the

frame, platen

, install the

bearing, platen

from the outside of th e

frame, platen

; then secure it with

an

R.E.

❏

Lubricate with G-15 two points where the screw on the

lock lever

assembly

is secured.

platen, straight

assembly

bearing, platen

R.E.(2.5)

bearing,

platen

frame, platen

G-15

6-6 Assembly and Disassembly Rev. A

Confidential

Pre-assembly C Cutter motor assembly

Reassembly

step

Part name Assembly procedure

1

Microswitch

2

Lead wire, paper cutter

❏

Solder the white lead wire of the

lead wire, paper cutter

to the

microswitch

.

3

Cutter motor sub-assembly

❏

Solder the red wire of the

Lead wire, paper cutter

to the red marked

terminal side of the

Cutter motor sub-assembly

, and solder the black lead

wire to the other terminal.

★

<Check>

❏

Make sure to arrange the lead wires properly .

microswitch

white

lead wire, paper cutter

black

red

*No polarity

red mark

red

black

lead wire,
paper cutter

cutter motor

sub-assembly

Rev. A Assembly and Disassembly 6-7

EU-T532/T542 Technical Manual

Confidential

Pre-assembly D Cutter, cover sub-unit

Reassembly

step

Part name Assembly procedure

1

Cutter, cover sub-assembly

➁

Gear, cutter worm, H

❏

Lubricate with G-36 the bore of the

gear, cutter worm, H

and the point

where the

gear, cutter worm, H

comes in con tact with the

cutter, cover

sub-assembly

; then install it on the

cutter, cover sub-asse mb ly .

3

Shaft, reduction A/C

❏

Insert the

shaft, reduction A/C

to the bores of the

gear, reduction A/C

and the

gear, cutter worm, H

.

★

<Check>

❏

Make sure that the

shaft, reduction A/C

is oriented properly before

insertion.

gear, cutter worm, H

G-36

cutter, cover sub-assembly

G-36

G-36

shaft, reduction A/C

gear, cutter worm

6-8 Assembly and Disassembly Rev. A

Confidential

Pre-assembly D

Reassembly

step

Part name Assembly procedure

4

Cutter, motor assembly
C.B.(M2.3

×

× ×

×

3)

× 1

Screw, switch

❏

Install the

cutter, motor assembly

to the

cutter cover sub-a ssembly

, and

secure it with the

C.B.(M2.3

×

× ×

×

3).

❏

Install the

microswitch

to the

cutter cover sub-assembly

, and secure it with

the

screw, switch.

★

<Check>

❏

Tightening torque: 245 to 294 mN•m {2.5 to 3.0 kg•cm} (

C.B.(M2.3

×

× ×

×

3)

)

❏

Tightening torque: 108 to 147 mN•cm {1.1 to 1.5 kg•cm} (

screw, switch

)

❏

Make sure to install the

cutter, motor

with the labeled side down.

❏

Make sure that the

cutter, motor

is installed sec urely.

❏

Make sure that the dowel on the

microswitch

fits securely in the mounting

hole on the

cutter cover sub-assemb ly

.

5

Cutter drive gear
sub-assembly
Plain washer (3

×

× ×

×

0.5

×

× ×

× 7) × 1

R.E. (2.5)

× 1

❏

After lubricating the shaft on the

cutter cover sub-assemb ly

with G-36,

install the

cutter drive gear sub-assembly

and the

plain washer

on the shaft; then secure them with an

R.E.

screw, switch

C.B.(M2.3 × 3)

microswitch

cutter motor
assembly

cutter cover
sub-assembly

mounting ho le

R.E.(2.5)

plain washer

cutter drive gear
sub-assembly

cutter motor

microswitch actuator

G-36

Rev. A Assembly and Disassembly 6-9

EU-T532/T542 Technical Manual

Confidential

Pre-assembly D

Reassembly

step

Part name Assembly procedure

★

<Check>

❏

Make sure not to apply excessive pressure to the

microswitch

actuator

when installing the

cutter drive gear sub-assembly

.

❏

Make sure not to damage the

cutter drive gear sub-assembly

when

securing it with th e

R.E.

➅

❏

Lubricate the specified areas with G-36.

G-36

G-36

G-36

6-10 Assembly and Disassembly Rev. A

Confidential

Pre-assembly E Cutter unit

Reassembly

step

Part name Assembly p ro ce d u re

1

Cutter cover sub-uni t

2

Cutter frame assembly
C.B.S-tite (M3

×

× ×

×

5)

× 1

❏

Pass the

lead wire, paper cutter

through the hole on the

cutter frame

assembly

and secure the

cutter cover sub-unit

and the

cutter frame

assembly

with a screw.

❏

When putting the

cutter cover sub-un it

and the

cutter frame assembly

together, insert the

shaft, movable cutter blade drive

into the oval hole

on the

movable cutter blade

.

★

<Check>

❏

Tightening torque: 686 to 882 mN•m {7 to 9 kg•cm}

❏

Make sure that the

shaft, movable cutter blade drive

fits securely into the

oval hole on the

movable cutter blade

.

❏

Make sure that the edges of the

cutter cover sub- uni t

fit into the hooks on

the

cutter frame assembly

.

C.B.S-tite (M3 × 5)

oval hole

lead wire, paper
cutter

cutter cover, sub-unit

cutter frame assembly

shaft, movable cutter
blade drive

hook

hook

cutter frame assembly

shaft, movable cutter

blade drive

oval hole

cutter cover, sub-unit

cutter cover, sub-unit

Rev. A Assembly and Disassembly 6-11

EU-T532/T542 Technical Manual

Confidential

Pre-assembly E

Reassembly

step

Part name Assembly p ro ce d u re

3

Emergency cutter, full, B
C.B.(M2

×

× ×

×

2.5)

× 2

❏

Install the

emergency cutter, full

to the

cutter cover sub-unit

with screws.

★

<Check>

❏

Tightening torque: 147 to 196 mN•m {1.5 to 2 kg•cm}

4

Plate, A/C

❏

Loosen the

C.B.S-tite (M3

××××

5)

to attach the

plate A/C

to the

cutter cover

sub-unit

; tighten it again.

C.B.(M2 × 2.5)

plate, A/C

C.B.S-tite (M3 × 5)

cutter cover sub unit

6-12 Assembly and Disassembly Rev. A

Confidential

Pre-assembly F Installation of Black mark detector sub-assembly (optional)

Reassembly

step

Part name Assembly p ro ce d u re

1

Black mark (B.M.) sub ­assembly

2

Paper guide
C.P-tite F screw (M2

×

× ×

× 3)

× 1

❏

Install th e

B.M. detector sub-assembly

in one of the two detector

mounting holes on the

paper guide

, and secure it with a screw. Both the

straight path and the curv ed path types can be installed this wa y.

★

<Check>

❏

Tightening torque: 118 to 216 mN•m {1.2 to 2.2 kg•cm}

❏

Make sure that the detector fits securely into the detector mounting hole

on the

paper guide

.

C.P-tite. F screw (M2 × 3)

B.M. detector sub -assembly

paper guide

mounting hole

Rev. A Assembly and Disassembly 6-13

EU-T532/T542 Technical Manual

Confidential

Main Assembly A Installation of the Motor, paper feed, receipt, B and

the Platen detector

Reassembly

step

Part name Assembly procedure

1

Frame assembly

2

Motor, paper feed, receipt,
B
C.B.S-tite (3

×

× ×

×

5)

× 2

❏

Align the

motor, paper feed, receipt, B

with the mounting position on the

frame assembly

and secure it with scerws.

★

<Check>

❏

Tightening torque: 686 to 882 mN•m {7 to 9 kg•cm}

❏

Make sure that the

motor, paper feed, receipt, B

is oriented properly

.

3

Platen detector assembly
C.P. (1.6

×

× ×

×

5)

× 1

❏

Align the

platen detector assembly

to the mounting position on the

frame

assembly

, and secure it with a screw.

motor, paper feed, receipt, B

C.B.S-tite (3 × 5)

frame assembly

frame assembly

platen detector
assembly

C.P. (1.6 × 5)

6-14 Assembly and Disassembly Rev. A

Confidential

Main Assembly A

Reassembly

step

Part name Assembly procedure

★

<Check>

❏

Tightening torque: 98 to 147 mN•m

❏

After installing the

platen detector assembly

, arrange the lead wires.

lead wires

Rev. A Assembly and Disassembly 6-15

EU-T532/T542 Technical Manual

Confidential

Main Assembly B Installation of the Paper guide, straight, front and the

Paper guide, straight, back unit

Reassembly

step

Part name Assembly p ro ce d u re

1

Paper guide, straight, front

(for the EU-T532)

*For the EU-T542, use the

Paper guide, straight, front,

B

.

2

Pin, guide, straight

× 2

❏

Insert the

pin, guide, straight

into the holes on the

paper guide, straight,

front*

.

3

Paper guide, straight, back
unit

(for the EU-T532)

C.B. (2.5

× 4

× 4 × 4

× 4

)

× 2

*For theEU-T542, use the

Paper guide, straight,
back, B unit

.

❏

After putting the

paper guide, straight, front

and the

paper guide, straight ,

back unit

* together, install them to the mounting holes on the

frame

assembly

and secure them with screws.

paper guide, straight, front

pin, guide, straight

C.B. (M2.5 × 4)

frame, assem bly

paper guide, straight,

back unit

mounting hole s

paper guide, straight, front

6-16 Assembly and Disassembly Rev. A

Confidential

Main Assembly B

Reassembly

step

Part name Assembly p ro ce d u re

★

<Check>

❏

Tightening torque: 588 to 637 mN•m {6 to 6.5 kg•cm}

❏

The dowels on t h e

paper guide, straight, back unit

fit securely into the

holes on the

frame assembly

.

❏

Make sure that the lead wires of the

paper detector assembly

are not

caught between the

frame assembly

and the

paper guide, straight,

back unit

.

❏

Make sure that the wires of the

paper detector assembly

are passed

under the hook on the

paper guide, straight, back unit.

hook

paper guide, straight,
back unit

Rev. A Assembly and Disassembly 6-17

EU-T532/T542 Technical Manual

Confidential

Main Assembly C Installation of the Frame, platen, straight unit

Reassembly

step

Part name Assembly p ro ce d u re

➀

❏

Lubricate the dowel on the

frame assembly

with G-36.

➁

❏

Lubricate the point where the

frame assembly

contacts with the

lock

lever assembly

with G-15.

3

Frame, platen, straight unit❏

Install the

frame, platen, straight unit

to the

frame assembly

.

4

Shaft, frame, platen
R.E. (1.5)

× 1

❏

Align the holes on the

frame assembly

and the

frame, platen, straight unit

,

and insert the

shaft, frame, platen

into these holes; then, secure it with an

R.E.

.

5
6

Lever, platen
Spring, lever, platen

❏

Install the

spring, lever, platen

on the

lever, platen

, as shown below.

frame, platen,
straight unit

dowel

frame assembly

G-36

point where the frame

assembly contacts with
the lock lever assembly

G-15

G-15

R.E (1.5)

shaft, frame, platen

longer edge

shorter edge

spring, lever, platen

lever, platen

6-18 Assembly and Disassembly Rev. A

Confidential

Main Assembly C

Reassembly

step

Part name Assembly procedure

★

<Check>

❏

Hook the longer edge of the

spring, lever, platen

into the groove on the

lever, platen

.

❏

Make sure not to deform the

spring, lever, platen

.

7

R.E. (2)

× 1❏ Install the

lever, platen

to the

shaft, frame, platen

, and secure it with an

R.E.

.

★★★★

<Check>

❏

Make sure that the

shaft, lock lever

is placed properly into the specified

position on the

lever, platen

.

8

❏

Remove the longer edge of the

spring, lever, platen

, and hook it on the

shaft, lock lever

.

groove

longer edge

shaft, frame, platen

lever, platen

R.E. (2)

shaft, lock lever

shaft, lock lever

lever, platen

longer edge of the spring,
lever platen

shaft, lock lever

Rev. A Assembly and Disassembly 6-19

EU-T532/T542 Technical Manual

Confidential

Main Assembly D Installation of the Thermal print head assembly

Reassembly

step

Part name Assembly procedure

1

Thermal print head
assembly

❏

Install the

thermal print head assembly

in the grooves on the

frame

assembly

.

★

<Check>

❏

When handling the

thermal print head assembly

, use proper bo dy
grounding procedures to avoid static electricity.
(Use a conductive mat and wrist band during assembly.)

❏

Do not touch the connector te rmina ls and th e sur face o f the

thermal print

head assembly

. If foreign matter attaches to them, wip e off th e foreign

matter lightly, usin g a cott on swab dampened wit h a lco hol.

thermal print head

assembly

frame assembly

6-20 Assembly and Disassembly Rev. A

Confidential

Main Assembly E Installation of the Plate, pressure spring

Reassembly

step

Part name Assembly procedure

1

Plate, pressure spring

2

Circuit board assembly
C.B.S-tite (M2.5

×

× ×

×

4)

× 1

❏

Install the

circuit board

to the

plate, pressure spring

, and secure it with

screws.

★

<Check>

❏

Tightening torque: 588 to 637 mN•m {6 to 6.5 kg•cm}

3

Spring, press head

× 2❏ Install the

spring, press head

to the

plate, pressure spring

.

★

<Check>

❏

Make sure that the

spring, press head

is pushed securely into the

plate,

pressure spring

.

4

❏

Hook the edge of the

spring, press head

to the groove of the

thermal print

head assembly

while pushing the

plate, pressure spring

in the arrow

direction; then hook it to the groove of the

frame assembly

.

plate, pressure spring

C.B.S-tite (M2.5 × 4)

circuit board
assembly

spring, press head

plate, pressure spring

groove of the thermal
print head ass embly

spring, press head

groove of the frame
assembly

groove of the
frame assembly

Rev. A Assembly and Disassembly 6-21

EU-T532/T542 Technical Manual

Confidential

Main Assembly E

Reassembly

step

Part name Assembly p ro ce d u re

★

<Check>

❏

Make sure that the lead wires, such as those for the

paper detector

assembly

are not caught on anything when installing the

spring, press

head

.

❏

Make sure that the lead wires of the

paper detector assembly

and the

paper detector assembly

are passed under the

plate, pressure spring.

❏

Make sure that the edge of the

spring, press head

fits securely into the

groove on the

thermal print head assembly

.

❏

Make sure that the

plate, pressure spring

is hooked securel y into the hole

on the

frame assembly

.

lead wires

plate, pressure spring

spring, press head

thermal print head
assembly

plate, pressure spring

frame assembly

6-22 Assembly and Disassembly Rev. A

Confidential

Main Assembly F Installation of the Fixing plate, the Gear, reduction and

the Gear, idler

Reassembly

step

Part name Assembly procedure

1

Fixing plate
C.B.S-tite (M3

×

× ×

×

5)

× 1

❏

Install the

fixing plate

to the

frame assembly

, and secure it with the screw

while pushing the edge of the

fixing plate

to the

bearing, platen

.

★

<Check>

❏

Tightening torque: 686 to 882 mN•m {7 to 9 kg•cm}

❏

Make sure that the edge of the

fixing plate

is pushed securely to the

bearing, platen

.

2

Gear, reduction

3

Gear, idler
R.E. (2.5)

× 2

❏

Install the

gear, reduction

and the

gear, idler

to the shafts on the

frame

assembly

, and secure them with

R.E.

s.

★

<Check>

❏

Make sure not to deform the shaft on the

frame assembly

when securing

with the

R.E.

C.B.S-tite (M3 × 5)

bearing, platen

fixing plate

frame assembly

R.E. (2.5)

gear, reduction

gear, idler

frame assembly

shafts

Rev. A Assembly and Disassembly 6-23

EU-T532/T542 Technical Manual

Confidential

Main Assembly G Installation of the Cover, gear

Reassembly

step

Part name Assembly procedure

1

C.B.S-tite (M3

×

× ×

×

5)

× 1

❏

Loosen a screw on the gear side.

2

Cover, gear

× 1❏ Hook th

e cover, gear

to the edge of the

shaft, frame, platen

, the frame,

and the

C.B.S-tite (M3

×

× ×

×

5)

; then attach it to the side of the printer.

3

❏

Tighten the

C.B.S-tite (M3

×

× ×

×

5)

again.

★

<Check>

Tightening torque: 686 to 882 mN•m {7 to 9 kg•cm}

C.B.S-tite (M3

×

5)

C.B.S-tite (M3 × 5)

shaft, frame,
platen

cover, gear

6-24 Assembly and Disassembly Rev. A

Confidential

Main Assembly H Installation of the Cutter unit

Reassembly

step

Part name Assembly procedure

1

Cutter unit
C.B.S-tite (M3

×

× ×

×

5)

× 2

❏

Install the

cutter unit

to the

frame assembly

and secure it with screws,

while the

lead wire, paper cutter

is passed through the hook on the

frame

assembly

.

★

<Check>

❏

Tightening torque: 686 to 882 mN•m {7 to 9 kg•cm}

❏

Make sure that the

lead wire, paper cutter

is passed through the hook on

the

frame assembly

properly as sh own above.

❏

Make sure that the

lead wire, paper cutter

is not caught between any

places when securing the

cutter unit.

❏

Install the

cutter unit

in the platen-up state.

②

❏

Lubricate the point where the

fixed blade, H

of the cutter unit contacts

the

cutter frame

with G-15.

C.B.S-tite (M3 × 5)

frame assembly

lead wire, paper cutter

cutter unit

platen

cutter unit

G-15

G-15

Rev. A Assembly and Disassembly 6-25

EU-T532/T542 Technical Manual

Confidential

Assembly I Arranging the lead wires

Reassembly

step

Part name Assembly procedure

1

❏

Insert the lead wire connectors to the connectors on the

circuit board

.

★

<Check>

❏

Make sure that the connectors are oriented properly when connecting.

❏

Make sure that the connectors are inserted securely.

2

❏

All lead wires should be pa ssed through the hook o n th e

frame assembly

,

and arranged inside of th e prin t er.

★

<Check>

❏

Make sure that any of the lead wires are not caught by the projections

(the colored part).

❏

Make sure not to damage the coats of the lead wire s when arr angin g the

lead wires.

3

Sheet, board

× 1❏ Paste the double-sided tape on the

sheet, board

to the

circuit board

.

variable resistor

connector for the platen detector assembly

connector for the
motor, paper feed,
receipt, B

connector for the
lead wire, paper
cutter

connector for the optional B.M. detector

connector for the paper
detector assembly

hook

projections

sheet, board

6-26 Assembly and Disassembly Rev. A

Confidential

Adjustment for Printer Module

Adjustment of the black mark detector

Adjust the

black mark (B.M.) detector

using the following procedure.

Adjustment

step

Adjustment procedure Adjustment point

1

❏

Connect the FFC terminal No.12 to an

oscilloscope to display the output power voltage
of the B.M. detector on the oscilloscope screen.

2

❏

Input DC5 V to the FFC termi nal No. 13.

3.

❏

Insert a “Kodak Gray Card” into the pape r

entrance.
(“Kodak Gray Card”: A commercially available
card for adjusting exposure.)

❏

Make sure that the gray side of the card is in serted

along the

paper guide

which the

B.M. detector

sub-assembly

is installed.

4.

❏

Adjust the output power voltage of the

B.M.

detector

at 1.74 V using the variable resistor on

the

circuit board assembly

.

❏

Turn the slot on the variable resistor to the right

and the left wit h a t ool s uch as a f lat -he a d dri ve r,
to adjust the output power voltage.

.....13 12 11 10 .....

NO.1

NO.15

circuit board

FFC

oscilloscope

DC5 V

GND

B.M. detector
sub-assembly

gray side of the g r ay ca r d

paper guide

<Cross-section>

variable resistor

Rev. A Assembly and Disassembly 6-27

EU-T532/T542 Technical Manual

Confidential

Disassembly

❏ The disassembly process is divided into the unit disassembly and the module disassembly.

First perform the unit disassembly; then proceed to the module disassembly after the
components have been disassembled into modules.

❏ Disassembly of printer compon ents beyond the exploded diagrams at the end of this manual

may result in damage to the printer and its functions.

❏ <Check> and <Reassembly Point> are given in “Disassembly step” with ★ and ✩ symbols.

Make sure to follow the instructions given in these places when disassembly and
reassembly.

❏ New wire bands are required when reassembly for wire bands cut during disassembly. See

page 6-29 and “Part name” in the disassembly steps for types and numbers of wire bands.

❏ The numbers in the illustrations indicate the step numbers.

Component Configurations Overview

The EU-T532/T542 have two disassembly types for ASP (After Service Parts) replacement. The
one is “Unit disassembly” for disassembling the EU-T532/T542 into modules, the other one is
“Module Disassembly” for disassembling each module into small parts. The configurations
when performing those disassemblies are as follows:

Unit Disassembly

(p. 6-30 to 37)

When performing the unit disassembly, the EU-T532/T542 are disassembled into the following
modules and parts. When you want to disassemble a cor responding it em only , see t he p age a nd
the step numbers in brackets after part names.

❏ Cover, UIB (p. 6-30)
❏ Dust cap (p. 6-30)
❏ COM, cover (p. 6-30)
❏ Control circuit board module (p. 6-30 and p. 6-31: step 5)
❏ Paper exit (p. 6-33: step 1)
❏ Cut sheet presenter module (p. 6-30 to 34)
❏ Printer module (p. 6-30, 31, and 33 to 35)
❏ Plate, lower paper guide (p. 6-35: step 5)
❏ Plate, paper guide holder (p. 6-35: step 5 and p.6-36: step 7)
❏ Holding plate, printer (p. 6-30, 31 to 36)
❏ Crescent ring (p. 6-37: step 9)
❏ Holder, paper roll (p. 6-37)
❏ Paper roll supply module (p. 6-30 to 37)

6-28 Assembly and Disassembly Rev. A

Confidential

Module Disassembly

(p. 6-38 to 46)

When performing the module disassembly, the modules are disassembled into the following
parts. When you want to disassemble a corresponding item only, see the page and the step
numbers in brackets after part names.

Paper roll supply module

❏ Cover, circuit board B (p. 6-30: step 5 to 6)
❏ Plapoint (p. 6-30: step 5)
❏ Crescent ring (p. 6-38: step 2 to p. 6-41: step 9)
❏ Paper roll hold unit (p. 6-38: step 1)
❏ Spacer, paper roll holder (p. 6-38: step 2)
❏ Hexagonal nut (p.6-38 to p. 6-39: step 3)
❏ Paper roll tension unit (*1) (p. 6-38: step 2 to p. 6-42: step 12)
❏ Screw, paper NE detector (p. 6-38: step 2 to p. 6-42: step 12 to 13)
❏ Paper NE harness assembly (*2) (p. 6-38: step 2 to p. 6-42: step 12to 15)
❏ Photo interrupter (*3) (p. 6-38: step 2 to p. 6-42: step 12 to 16)
❏ C.B. (M3 × 6) (p. 6-38: step 1)
❏ Wire band

Cut Sheet Presenter Mo du le

❏ Spring, cut sheet presenter (p. 6-43: step 1)
❏ Recover feeding A asse mbly (p. 6-43)
❏ Cable, presenter module (*4) (p. 6-43 to 44)
❏ Presenter module circuit board assembly (p. 6-43 to p. 6-45: step 9)
❏ Spring, cut sheet presenter frame (p. 6-43 to 45)
❏ Upper frame, cut sheet presenter unit (*5) (p. 6-43 to p. 6-46: step 13)
❏ Gear, idler (p. 6-43 to 46)
❏ Lower frame unit (*6) (p. 6-43 to 46)
❏ Wire band
❏ C.B (M3 × 4)
❏ R.E (4)

Rev. A Assembly and Disassembly 6-29

EU-T532/T542 Technical Manual

Confidential

Note:

❏

For the parts marked with (*1) to (*6), new wire bands are required when assembly, since the
following wire bands used for those parts will be cu t during disassembly. See the disassembly steps for
the position of the wire bands.

(*1): Wire band (SKB-85)

×

1

(*2): Wire band (SKB-85)

×

1

(*3): Wire band (SKB-85)

×

1

(*4): Wire band (SK-1.5M)

×

1

(*5): Wire band (SKB-85)

×

2

(*6): Wire band (SKB-85)

×

2 and wire band (SKB-1.5M) × 1

The wire bands given below are the identical ones.

• (*2) and (*3) wire bands (SKB-85)

• (*4) and (*6) wire bands (SKB-1.5M)

• (*5) and (*6) wire bands (SKB-85)

❏

When you replace the

cut sheet presenter module

, the

paper exit

, and the

upper frame

cut sheet presenter unit

, a

seal, paper exit guide

is required for each part.

6-30 Assembly and Disassembly Rev. A

Confidential

Unit Disassembly

Cover, circuit board A/B and Control circuit board module

Disassembly

step Disassembly part name Disassembly proce d u re

1

Cover, UIB

× 1

C.B (M3

×

× ×

×

4)

× 2

❏

Remove the

C.B (M3

××××

4)

to remove the

cover, UIB

from the

cover, circuit

board A

.

2

Dust cap

× 1❏ Remove the

dust cap

from the parallel connector on the circuit board

module.

3

COM, cover

× 1❏ Remove the

COM cover

from the serial connector on the circuit board

module.

4

Hexagonal lock screw
(millimeter screw)

× 2

❏

Remove two

hexagonal screw

s fastening the serial connector on the

control circuit board

and the

cover, circuit board A

.

5

Plapoint

× 2

❏

Loosen two

plapoint

s.

6

Cover, circuit board B

× 1❏ Remove the

cover, circuit board

while sliding it to the right.

7

❏

Disconnect the

paper NE harness assembly

, the connector for the cut
sheet presenter module and two cables for the printer module from the
control circuit board.

4

5

6

cover, circuit board A

3

2

cover, UIB

1

control circuit board module

paper NE harness assembly

cut sheet presenter
module cable

printer module cab les

Rev. A Assembly and Disassembly 6-31

EU-T532/T542 Technical Manual

Confidential

8

Control circuit board
module

× 1

C.B.(3

×

× ×

×

4)

× 4

❏

Remove four

C.B.(3

×

× ×

×

4)

s; then remove the control circuit board mod u le.

★

<Check>

❏

Use a proper body grounding proced u re befo re ha ndli ng th e con trol

circuit board module.

❏

Do not deform the parallel c onne c tor on th e con tro l circu it boa r d

module by getting caugh t it on the cover.

9

Cover, circuit board A

× 1

C.B.(3

×

× ×

×

4)

× 6

❏

Remove six

C.B.(3

×

× ×

×

4)

s: then remove the

cover, circuit board A

from the

paper roll supply module

.

10

Plate, cable hold

× 1

C.B.(3

×

× ×

×

3)

× 2

❏

Remove two

C.B.(3

×

× ×

×

3)

s; then remove the

plate, cable hold

.

Disassembly

step Disassembly part name Disassembly procedure

5

10

9

9

control circuit board module

plate, paper hold

cover, circuit board A

seal, paper exit guide

8

6-32 Assembly and Disassembly Rev. A

Confidential

✩

<Reassembly Point:
for the cover, circuit board A/B and control circuit board module>

1. Hold two cables for the printer module and a cable for the cut sheet
presenter module with the

plate, cable hold

; then secure it with two

C.B.

(3

××××

3)

s.

Tightening torque: 539 to 637 mN•m {5.5 to 6.5 kg•cm}

<Reassembly Check>

•Hold the cable for the cut sheet presenter module 7.5 cm from the

connector while aligning it with the frame inside edge of the paper roll
supply module.

•When you pull the cut sheet presenter module fully to the near side with

your fingers on/around the

seal, paper exit guide

, the cable shou ld have

a little slack. (It should not be stretched out.)

•The cables for the printer module should not be run together.

2. Attach the

cover, circuit board A

to the paper roll supply module, and

secure it with six

C.B. (3

××××

4)

s

3. Attach the control circuit module and secure it with

C.B. (3

××××

4)

s in four

places temporarily.

4. Connect the cables and the connectors to the control circuit board

module.

<Reassembly Check>

Make sure to note the numbers of the pins and the color of the
connectors and before connecting. The connector types are as follows:

5.Secure the serial connector of the control circuit board mo du le to the

cover, circuit board A

with two lock screws.

6. Tighten the control circuit board module firmly.

Tightening torque: 539 to 637 mN•m {5.5 to 6.5 kg•cm}

7. Set the DIP switches.
*For the DIP switch setting details, see “DIP switches” on page 2-20.

Disassembly

step Disassemb ly part name Disassembly procedure

Connector

Type 1

Type 2

Type 3 Type 4

Paper NE harness assembly × 1

○○−−

Cut sheet presenter module × 1

○○○○

Printer module: cable × 2

○○○○

Rev. A Assembly and Disassembly 6-33

EU-T532/T542 Technical Manual

Confidential

Paper exit

Disassembly

step Disasse mb ly p a rt na me Disassembly proce d u re

1

Paper exit

× 1

C.B.(3

×

× ×

×

6)

× 4

❏

Remove four

C.B.(3

×

× ×

×

6)

s; then remove the

paper exit

.

✩

<Reassembly Point>

❏

Tightening torque for reassembly: 539 to 637 mN•m {5.5 to 6.5 kg•cm}

❏

Do not forget to paste the

seal, paper exit guide

on the

paper exit

.

paper exit

seal, paper exit guide

upper frame, cut sheet presenter unit

6-34 Assembly and Disassembly Rev. A

Confidential

Cut sheet presenter module, Holding plate, printer, Plate, lower paper guide,
Plate, paper guide holder, and Holder, paper roll

Disassembly

step Disassembly p a rt n a me Disassembl y pr ocedure

1

C.B.(M3

×

× ×

×

4)

× 2❏ Remove two

C.B.(M3

×

× ×

×

4)

s at the bottom of the cut sheet presenter module.

2

Plapoint

× 1❏ Remove the

plapoint

on the cable side of the cut sheet presenter module.

3

❏

Put your fingers on/ ar ound the

seal, paper exit guide

and pull the cut sheet

presenter module fully to the near side to turn do wn wa rd.

4

Cut sheet presenter
module

× 1

C.B.(M3

×

× ×

×

4)

× 2

❏

Insert a screwdriver between the

shaft, cut sheet presenter frame

and the

recover feeding A assembly

, and remove two upper

C.B.(M3

××××

4)

s to

remove the cut sheet presenter module.

✩

<Reassembly Point>

❏

Do not forget to paste

seal, paper exit guide

on the

upper frame, cut sheet

presenter un it

.

cut sheet presenter module

upper frame, cut sheet presenter unit

1

seal, paper exit
guide

2

recover feeding A assembly

cut sheet presenter module

shaft, cut sheet
presenter frame

Rev. A Assembly and Disassembly 6-35

EU-T532/T542 Technical Manual

Confidential

5

Plate, lower paper
guide

× 1

C.B.(M3

×

× ×

×

4)

× 2

❏

Remove two

C.B.(M3

×

× ×

×

4)

s; then remove the

plate, lower paper guide

from

the

plate, paper guide holder

.

✩

<Reassembly Point>

With the

plate, lower paper guide

tab section inserted in the paper guide of

the printer module, secure the

plate, lower paper guide

pushed against the

holding plate, printer

with screws.

Tightening torque: 539 to 637 mN•m {5.5 to 6.5 kg•cm}

6

Printer module

× 1

C.B.(M3

×

× ×

×

4)

× 4

❏

Remove four

C.B.(M3

×

× ×

×

4)

s, and remove the printer module from the

holding

plate, printer

.

✩

<Reassembly Point>

❏

When you remove the printer module only, attach the

plate, lower paper

guide

again. (See

<Reassembly Point>

of the

plate, lower paper guide

for

attaching.)

❏

Pass the narrower FFC cable through the lower rectangle hole on the

holding

plate, printer

. Fold the other cable (the wider one) so that it faces the

control circuit b o ard sid e wit h out passing it throug h th e

holding plate,

printer

.

Disassembly

step Disassembly p a rt n a me Disassembl y pr ocedure

5

6

plate, lower paper guide

printer module

holding plate, printer

plate, paper guide holder

lower rectangle hole

6-36 Assembly and Disassembly Rev. A

Confidential

7

Plate, paper guide
holder

× 1

C.B.(M3

×

× ×

×

4)

× 4

❏ Remove two

C.B.(M3

×

× ×

×

4)

s securing the

plate, paper guide holder

and the

paper roll supply modu le, and remo ve tw o

C.B.(M3

×

× ×

×

4)

s securing the

plate,

paper guide holder

and the

holding plate, printer

; then remove the

plate,

paper guide holder

.

✩

<Reassembly Point>

1 Secure the

plate, paper guide holder

to the

holding plate, printer

while

pushing it to the

frame, main

of the paper rol l supply module.

2 Secure the

plate, paper guide holder

to the

frame, main

of the paper roll

supply module. At this time, make sure that there is no space between the

plate, paper guide holder

and the

frame, main

.

Tightening torque: 539 to 637 mN•m {5.5 to 6.5 kg•cm}

8

Holding plate, printer

× 1

C.B.(M3

×

× ×

×

4)

× 4

C.B.(M3

×

× ×

×

6)

× 2

❏

Remove four C.B.(M3

×

× ×

×

4)

s and two

C.B.(M3

×

× ×

×

6)

s to remov e the

holding

plate, printer

from the paper roll supply mo du le.

✩

<Reassembly Point>

1. Attach the

holding plate, printer

to the paper roll supply module, and secure

a screw temporarily. (step

➀

below)

2. Secure each screw to the respective mounting positions in sequence of
reassembly steps

➁

to ➆ below.

Tightening torque: 539 to 637 mN•m {5.5 to 6.5 kg•cm}

<Reassembly Check>

Be sure to note the size of screws.

➁

and ➆: C.B. (M3 × 6), other screws: C.B.

(M3 × 4))

Disassembly

step Disassembly p a rt n a me Disassembl y pr ocedure

6

6

Disassembly step: 7
Reassembly step:

➁

Disassembly step: 7
Reassembly step:

➆

Disassembly step: 7
Reassembly step:

➂

Disassembly step: 7
Reassembly step:

➅

holding plate, printe r

plate, paper
guide holder

Disassembly step: 7
Reassembly step:

➄

Disassembly step: 7
Reassembly step:

➀

tighten temporarily

➃

tighten securely

frame, main

Rev. A Assembly and Disassembly 6-37

EU-T532/T542 Technical Manual

Confidential

9

C-ring 46

× 1

❏

Remove the

C-ring 46

from the

shaft, paper roll

.

10

Holder, paper roll

× 1

❏

Remove the

holder, paper roll

from the

shaft, paper roll

.

Disassembly

step Disassembly p a rt n a me Disassembl y pr ocedure

8

9

shaft, paper roll