Epson L655 Service Manual

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Page 1

SERVICE MANUAL

Color Inkjet Printer

Epson ET-4550/3600

Epson L655/656/605/606

CONFIDENTIAL

SEMF15-002

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Notice:

by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior written permission of SEIKO EPSON CORPORATION.

 All effort have been made to ensure the accuracy of the contents of this manual. However, should any errors be

detected, SEIKO EPSON would greatly appreciate being informed of them.

 The contents of this manual are subject to change without notice.  The above not withstanding SEIKO EPSON CORPORATION can assume no responsibility for any errors in this

manual or the consequences thereof.

EPSON is a registered trademark of SEIKO EPSON CORPORATION.

Note :Other product names used herein are for identification purpose only and may be trademarks or r egistered

trademarks of their respective owners. EPSON disclaims any and all rights in those marks.

Printer CS Quality Assurance Department

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Safety Precautions

All safety procedures described here shall be strictly adhered to by all parties servicing and maintaining this product.

DANGER

Strictly observe the following cautions. Failure to comply could result in serious bodily injury or loss of life.

1. Always disconnect the product from the power source and peripheral devices when servicing the product or performing maintenance.

2. When performing works described in this manual, do not connect to a power source until instructed to do so. Connecting to a power source causes high voltage in the power supply unit and some electronic components even if the product power switch is off. If you need to perform the work with the power cable connected to a power source, use extreme caution to avoid electrical shock.

WARNING

Strictly observe the following cautions. Failure to comply may lead to personal injury or loss of life.

1. Always wear protective goggles for disassembly and reassembly to protect your eyes from ink in working. If any ink gets in your eyes, wash your eyes with clean water and consult a doctor immediately.

2. When using compressed air products; such as air duster, fo r cleaning during repair and maintenance, the use of such products containing flammable gas is prohibited.

PRECAUTIONS

Strictly observe the following cautions. Failure to comply may lead to personal injury or damage of the product.

1. Repairs on Epson product should be performed only by an Epson certified repair technician.

2. No work should be performed on this product by persons unfamiliar with basic safety knowledge required for electrician.

3. The power rating of this product is indicated on the serial number/rating plate. Never connect this product to the power source whose voltages is different from the rated voltage.

4. Replace malfunctioning components only with those components provided or approved by Epson; introduction of second-source ICs or other non-approved components may damage the product and void any applicable Epson warranty.

5. The capacitors on the Main Board may be electrically charged right after the power turns off or after driving motors which generates counter electromotive force such as when rotating the PF Roller or when moving the CR Unit. There is a risk to damage the Main Board if the Head FFC is short-circuited with the capacitors on the Main Board electrically charged, therefore, after the power turns off or after motors are driven, leave the printer untouched for approximately 30 seconds to discharge the capacitors before starting disassembly/ reassembly.

6. To prevent the circuit boards from short-circuiting, be careful about the following when handling FFC or cables.



When handling FFC, take care not to let the terminal section of FFC touch metal parts.

 When connecting cables/FFC to the connectors on circuit boards, connect them straight to the connectors to avoid

slant insertion.

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7. In order to protect sensitive microprocessors and circuitry, use static discharge equipment, such as anti-static wrist straps, when accessing internal components.

8. Do not tilt this product immediately after initial ink charge, especially after performing the ink charge several times. Doing so may cause ink to leak from the product because it may take some time for the waste ink pads to completely absorb ink wasted due to the ink charge.

9. Never touch the ink or wasted ink with bare hands. If ink comes into contact with your skin, wash it off with soap and water immediately. If you have a skin irritation, consult a doctor immediately.

10. When disassembling or assembling this product, make sure to wear gloves to avoid injuries from metal parts with sharp edges.

11. Use only recommended tools for disassembling, assembling or adjusting the printer.

12. Observe the specified torque when tightening screws.

13. Be extremely careful not to scratch or contaminate the following parts.

Nozzle plate of the printhead

  CR Scale  PF Scale  Coated surface of the PF Roller  Gears  Rollers  LCD  Scanner Sensor  Exterior parts

14. Never use oil or grease other than those specified in this manual. Use of different types of oil or grease may damage the component or give bad influence on the printer function.

15. Apply the specified amount of grease described in this manua l .

16. Make the specified adjustments when you disassemble the printer.

17. When cleaning this product, follow the procedure described in this manual.

18. When transporting this product after filling the ink in the printhead, pack the printer without removing the ink cartridges in order to prevent the printhead from drying out.

19. Make sure to install antivirus software in the computers used for the service support activities.

20. Keep the virus pattern file of antivirus software up-to-date.

21. When disassembling/reassembling this product, if you find adhesive power of the double-sided tape which secure the parts or FFC is not enough, replace the tape with new one and attach it correctly to the specified points where the parts or FFC should be secured.

22. Unless otherwise specified in this manual, the labels attached on the returned product should be transferred to the corresponding attachment positions on the new one referring to the labels on the returned product.

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About This Manual

This manual, consists of the following chapters, is intended for repair service personnel and includes information necessary for properly performing maintenance and servicing the product.

CHAPTER 1. TROUBLESHOOTING

Describes the step-by-step procedures for the troubleshooting.

CHAPTER 2. DISASSEMBLY / REASSEMBLY

Describes the disassembly/reassembly procedures for main parts/units of the product, and provides the standard operation time for servicing the product.

CHAPTER 3. ADJUSTMENT

Describes the required adjustments for servicing the product.

CHAPTER 4. MAINTENANCE

Describes maintenance items and procedures for servicing the product.

CHAPTER 5. APPENDIX

Provides the following additional information for reference:

• Connector Diagram

• Protection for Transportation

Symbols Used in this Manual

Various symbols are used throughout this manual either to provide additional information on a specific topic or to warn of possible danger present during a procedure or an action. Pay attention to all symbols when they are used, and always read explanation thoroughly and follow the instructions.

Indicates an operating or maintenance procedure, practice or condition that, if not strictly observed, could result in serious injury or loss of life.

Indicates an operating or maintenance procedure, practice, or condition that, if not strictly observed, could result in bodily injury, damage or malfunction of equipment.

May indicate an operating or maintenance procedure, practice or condition that is necessary to accomplish a task efficiently. It may also provide additional information that is related to a specific subject, or comment on the results achieved through a previous action.

For Chapter 2 “Disassembly/Reassembly”, symbols other than indicated above are used to show additional information for disassembly/reassembly. For the details on those symbols, see "2.3 Disassembly/Reassembly

Procedures (p37)".

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Revision Status

Revision Date of Issue Description

A May 19, 2015 First Release B October 19, 2015

C May 9, 2016

D June 15, 2016

 Chapter 2

 "2.1.5.1 Factors which Affect the Print Quality (p28)"  "2.1.5.2 Factors which Affect the Safety of Service Personnel such as Ink

Leakage during Operation (p29)"

 Chapter 1  1.1.1 Touble Shooting Workflow  Deleted “Initial Ink Charge” (p11)  Added “Poor Printing” “Blank Printing” (p27)  Chapter2  2.1.5 Checks and Precautions before Disassembling  2.1.5.1 Factors Which Affect the Print Quality(P27)  2.1.5.2 Factors Which Affect the Safety of Service Person such as Ink Leakage  during Operation(P30)  2.1.5.4 Discharging Procedure (P34)  2.3.2 Disassembly Flowchart  CISS System(P40)  2.4 Detail Disassembly/Reassembly Procedure for each Part/Unit  Ink Tank Housing Upper(P50)  Ink End Sensor Board Holder(P50)  Ink End Sensor Board(P50)  Charpt3  Required Adjustment List(P58)  3.3.1 Checking the Platen Gap(P64)

 Cover  The New Model Name(ET-3600,L605/606) is Added in the Service Manual Cover  Chapter1  1.3 Fatal Error Code List  The Fatal Error Code for Hexadecimal Number is Added (P14,15,16,17)

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Epson ET-4550, L655/656 Revision B

Contents

Chapter 1 Troubleshooting

1.1 Troubleshooting....................................................................................................................................................... 10

1.1.1 Troubleshooting Workflow ............................................................................................................................ 10

1.2 Power-On Sequence ................................................................................................................................................ 12

1.3 Fatal Error Code List............................................................................................................................................... 14

Chapter 2 Disassembly/Reassembly

2.1 O verview ................................................................................................................................................................. 19

2.1.1 Tools ............................................................................................................................................................... 19

2.1.2 Jigs .................................................................................................................................................................. 19

2.1.3 Locations of the Parts/Units ........................................................................................................................... 20

2.1.4 Standard Operation Time for servicing the product ....................................................................................... 24

2.1.5 Checks and Precautions before Disassembling .............................................................................................. 27

2.1.5.1 F actors which Affect th e Print Qu ality .................................................................................................. 27

2.1.5.2 F actors which Affect th e Safety of Servi ce Personnel such as Ink Leakage during Operation ............ 28

2.2 Common cautions when disassembling/reassembling the Product......................................................................... 34

2.3 D isassembly/Reassembly Procedures ..................................................................................................................... 36

2.3.1 Functional differences between models and component parts....................................................................... 36

2.3.2 Disassembly Flowchart................................................................................................................................... 37

2.4 Detailed Disassembly/Reassembly Procedure for each Part/Unit........................................................................... 44

2.5 Routing FFCs/cables ............................................................................................................................................... 50

Chapter 3 Adjustment

3.1 Required Adjustments ............................................................................................................................................. 54

3.2 Adjustment Program.................................. ..................................... ......................................................................... 58

3.2.1 O perating Environment .................................................................................................................................. 58

3.2.2 Details of the Adjustment Program ................................................................................................................ 58

3.2.2.1 CR Motor Heat Protection Control / PF Motor Heat Protection Control .............................................. 59

3.2.2.2 Scanner Motor Heat Protection.............................................................................................................. 59

3.2.2.3 MAC Address Setting.................................. .......................................................................................... 60

3.3 D etails of Adjustments ............................................................................................................................................ 61

3.3.1 Checking the Platen Gap ................................................................................................................................ 61

3.3.1.1 Preparation ............................................................................................................................................. 61

3.3.1.2 Confirmation procedure......................................................................................................................... 63

Chapter 4 Maintenance

4.1 Cleaning................................................................................................................................................................... 65

4.1.1 Cleaning the nozzle plate section of the printhead......................................................................................... 65

4.1.2 Cleaning the CR Unit ..................................................................................................................................... 66

4.1.3 Cleaning the Exterior Parts/inside of the printer ............................................................................................ 67

4.2 Lubrication .............................................................................................................................................................. 68

4.3 Lubrication Points and Instructions......................................................................................... ................................ 69

Chapter 5 Appendix

5.1 Connector Diagram ................................................................................................................................................. 75

5.2 P rotection for Transportation .................................................................................................................................. 76

5.2.1 Securing the CR Unit.................................................... ... ..................................... .......................................... 76

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5.2.2 Securing the Stacker Assy ............................................................................................................................ 77

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CHAPTER 1

TROUBLESHOOTING

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Epson ET-4550, L655/656

 This flowchart is compiled based on the following contents.

• Our experience regarding the quality problem

• ESK’s repair data

• Printer Mechanism specification for ET-4550, L655/656

 If the reason for the return is evident, first check the phenomenon user claims recurs,

then proceed to the troubleshooting.

What is returned reason?

Standby condition

Is printing operation

finished without error?

Start

Turn on the printer

(p 11)

Copy an image

*: In case of “Not Trouble Found”, check fatal error code.

(p 11)

ADF/Scanner

unit failure

Printer failure only

Yes

Does printer turn on the

power?

Is Power-on sequence

finished without error?

Print check pattern

Is printing operation

finished without trouble?

Is scanning operation

finished without

trouble?

Is ADF operation finished

without trouble?

Copy an image by ADF

ADF failure?

Finish

1.1 Troubleshooting

This section describes the troubleshooting workflow.

1.1.1 Troubleshooting Workflow

The following page describes the troubleshooting workflow. Follow the flow when troubleshooting problems.

Revision B

Figure 1-1. Troubleshooting Workflow (1)

Troubleshooting Troubleshooting Workflow 10

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Epson ET-4550, L655/656 Revision B

The power-on

sequence does not start (p 10)

No Power

[Presumable Cause]

• Power Supply Unit damage

• Main Board damage

• Panel Unit damage

[Major Troubleshooting]

• Power Supply Unit replacement

• Main Board replacement

• Panel Unit replacement

* : If the printer can turn on but turns

off right away, the protection circuit may cut off the power due to an error such as a circuit failure.

Please refer to " 1.3 Fatal Error

Code List (p14)"for

troubleshooting.

Error is indicated during printing nozzle check pattern (p 10)

Fatal error

Error is indicated during power-on sequence (p 10)

Maintenance error

[Occurrence Condition]

This error occurs when maintenance counter in EEPROM exceeds the specified value.

[Major Occurrence Timing]

• Power-on timing

• Print start timing

• Paper eject timing

• Cleaning timing

[Major Troubleshooting]

• Replace Maintenance Box

• Paper Guide Lower Porous Pad replacement

• Maintenance counter reset (only Paper Guide Lower Porous Pad)

Incomplete Initial Ink Charge

[Occurrence Condition]

LCD and STM indicate "Initial ink charging is not complete".

[Major Occurrence Timing]

• Power-on timing

[Major Troubleshooting]

• Perform initial ink charge

Ink End error

[Occurrence Condition]

This error occurs when ink counter reaches ink end level.

[Major Occurrence Timing]

• Power-on timing

• Print start timing

• Paper eject timing

• Cleaning timing

[Major Troubleshooting]

• Refill ink and reset ink counter by panel.

Paper Jam error

Please refer to " Paper Jam error".

CR Fixing Tape error

[Occurrence Condition]

This error occurs if a paper jam occurs during the power-on sequence before initial ink charge.

[Major Occurrence Timing]

Power-on timing (before initial ink charge)

[Major Troubleshooting]

Open the scanner unit and remove the CR fixing tape.

Problems related to print result or during printing(p 10)

Scanning cannot be performed

successfully (p 10)

Scanner failure

[Presumable Cause]

• Contamination of Scanner Glass

• Contamination of Document Pad

• CIS Unit bonding failure

• CIS Unit damage

• Scanner Motor damage

[Major Troubleshooting]

• Scanner Glass cleaning

• Document Pad cleaning

• Document Pad replacement

• CIS Unit replacement

• Scanner Motor replacement

• Scanner Unit replacement

ADF does not operate normally

(p 10)

Paper Jam error

[Occurrence Condition]

This error occurs when top/bottom of paper is not detected by PE Sensor in the specified steps of paper feeding operation correctly.

[Major Occurrence Timing]

• Power-on timing

• Paper loading timing

• Paper eject timin g

• Duplex print timing

[Major Troubleshooting]

1 remove the jammed paper by opening

Scanner Unit or Printer Cover. 2 Push “Start” button. 3 If not resolved by 2), check the

following.

• Foreign material, bits of paper

• Part come-off

• PE Lever

• PE Sensor

• Float of Paper Guide Front Porous Pad

•Main Board

• PW Sensor

[NOTE]

* If an error occurs during printing, the page where the error occurred is skipped and the printing resumes from the next page. * If an error occurs during duplex printing, the following are performed.

• If an error occurs during the front face of duplex printing, the page where the error occurred and the next page are skipped and the printing resumes from the page after the next.

• If an error occurs during the back face of duplex printing, the page where the error occurred is skipped and the printing resumes from the next page.

No Paper error

[Occurrence Condition]

This error occurs when top of paper is not detected by PE Sensor in the specified steps of paper loading operation correctly.

[Major Occurrence Timing]

Paper loading timing

[Major Troubleshooting]

1 Put paper in cassette and push

“START” button.

2 If a paper stops before reaching

PE Sensor, remove it and check the paper condition.

3 A) If no damage on the paper, s et

edge guide correctly after putting paper in ca ssette and push “PRINT” button again. B) If damage on the paper, check foreign materials / parts come off / parts transforma tion in paper path.

4 If not resolved by 3-A) & 3-B),

check the following.

• Pickup Roller

• Duplex Unit

• PE Sensor

• Main Board

• PF Motor

• Casette Assy

Double Feed error

[Occurrence Condition]

This error occurs on the following cases.

• A paper is ejected without printing during paper loading operation.

• Actual paper length is longer than theoretical one.

[Major Occurrence Timing]

Paper loading timing

[Major Troubleshooting]

• PE Lever replacement

• PE Sensor replacement

• PW Sensor replacement

• Main Board replacement

[NOTE]

This error occurs only for manual duplex print.

No Paper Cassette error

[Occurrence Condition]

This error occurs if one of the cassettes is not installed.

[Major Occurrence Timing]

Paper loading timing (Front loading)

[Major Troubleshooting]

Install the Cassette Assy.

Paper Size Unmatch error

[Occurrence Condition]

This error occurs when actual paper size is not matched to theoretical one.

[Major Occurrence Timing]

• Duplex print timing

• FAX data print timing

[Major Troubleshooting]

1 Put correct sized paper in

cassette, and push “START” button.

2 If not resolved by step 1),

check the following points.

• PE Lever

•PE Sensor

• PW Sensor

• Main Board

Poor Printing

[Phenomenon]

• Poor printing quality

• Ink stain on paper

• Dot missing

• Paper eject without printing

[Presumable Cause]

• Driver / Panel mis-setting

• Contamination of CR scale

• Contamination of Printhead Cover

• Printhead damage

• Ink clogging of Printhead

• Contamination on Cap Unit / Wiper of Inksystem Assy

• Inksystem Assy damage

• Float of Paper Guide Front Porous Pad

• Narrow PG

• PE Lever damage

• PE Sensor damage

• PW Sensor damage

[Major Troubleshooting]

• Driver / Panel re-setting

• CR Scale replacement

• Printhead cover cleaning

• Printhead cleaning

• Refill ink

• Printhead replacement

• Rubber cleaning of Cap Unit of Inksystem Assy

• Inksystem Assy replacement

• Paper Guide Front Porous Pad re-installation

• PG readjustment

• Printer Mechanism replacement

• PE Lever replacement

• PE Sensor replacement

• PW Sensor replacement

• Main Board replacement

Poor Paper Loading

[Presumable Cause]

• Use of 3rd party media

• Edge guide mis-setting

• Foreign material

• Part come-off

• Contamination of paper feed roller (Duplex Unit)

• Cassette Assy damage

• Pickup Roller deterioration, contamination

• Contamination of PF roller

[Major Troubleshooting]

• Recommendation of EPSON media

• Edge guide re-setting

• Foreign material removal

• Part re-installat ion

• PF Roller replacement

• Cassette Assy replacement

• Pickup Roller replacement

Abnormal Noise

[Presumable Cause]

• Foreign material

• Insufficient grease

• Gear damage

[Major Troubleshooting]

• Foreign material removal

• Lubrication of grease

• Gear replacement

ADF failure

[Phenomenon]

• No paper feed

• Double feed

• Paper jam

• Paper skew

[Presumable Cause]

• Wear of Pickup Roller

• Wear of ADF Pad Assy

• Gear damage

• Scanner Motor damage

• Contamination of Scanner Glass

• ADF Paper Support Assy damage

• Foreign material

• ADF Cover Assy damage

• Wear of EJ Roller

• ADF Sensors damage

[Major Troubleshooting]

• ADF Cover Assy replacement

• ADF Pad Assy replacement

• Scanner Glass cleaning

• ADF Paper Support Assy replacement

• Foreign material removal

• Scanner Unit replacement

• ADF Unit replacement

Figure 1-2. Troubleshooting Workflow (2)

Troubleshooting Troubleshooting Workflow 11

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080

CRLock

CRUnit

1.2 Power-On Sequence

This section describes the power-on sequences for this product. The preconditions are as follows.

 Power-on sequence (See Table 1-1.)



Turning on the printer after turning it off without an error.

 The power was turned off normally at the previous shut down.  Initial ink charge has finished and every ink tank has sufficient ink.  No paper on the paper path.  The Printhead is capped by the cap of the Ink System and the CR Lock is engaged normally.

Table 1-1. Normal Power-on Sequence

CR Unit/PF Roller

movement and position

1. Printhead initialization

1-1.Initializes the Printhead.

Operation

2. Maintenance error de tec t ion

2-1.Checks the tube maintenance counter for ink tube errors. 2-2.Checks the waste ink counter if the waste ink overflow is occurring.

3. Releasing the CR lock

3-1.The PF Motor rotates clockwise, and releases the CR lock.

4. Seeking the home position

4-1.The CR Unit moves to the 0-digit side slowly and confirms it touches the Right Frame.

4-2.By regarding the position where the CR Unit touches the Right Frame as the specified distance from the origin, the

home position is determined. Thereafter, the position of the CR Unit is monitored based on the information provided by the CR Encoder Sensor.

4-3.The CR Unit slowly moves to its home position.

4-4.The PF Roller rotates clockwise for approximately 1 second.

5. Low temperature operation sequence

5-1.The CR Unit moves between around the switch lever and in front of the Left Frame two times.

080 HP

Troubleshooting 12

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Epson ET-4550, L655/656 Revision B

Table 1-1. Normal Power-on Sequence

Operation

6. Adjustment of CR acceleration delay

6-1.The CR Unit moves between around the switch lever and in front of the Left Frame two times.

CR Unit/PF Roller

movement and position

080 HP

6-2.The measured CR acceleration delay time is recorded in the EEPROM.

7. CR measurement

7-1.The CR Unit moves until it touches the Right Frame.

7-2.The CR Unit slowly moves to its home position, and then moves until it touches the Right Frame again.

7-3.The CR Motor carries out the measurement drive, and the measured value is recorded in the EEPROM.

7-4.The CR Unit slowly moves to its home position

8. Ink detection and initializing the Ink System

8-1.The CR Unit moves slowly until it touches the Right Frame, and then moves back to its home position.

Note *1: The rotation directions of the PF Motor are as follows.

Clockwise: Paper is fed normally Counterclockwise: Paper is fed backward

*2: The conditions of the CR lock are as follows.

Red CR lock is set

White CR lock is released *3: If it cannot be initialized, the fatal error occurs. *4: Executed when the detected temperature is under 5

C (41oF) by the thermistor on the Printhead.

*5: The empty suction operation may occur depending on situations.

080 HP

Troubleshooting 13

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Epson ET-4550, L655/656 Revision B

1.3 Fatal Error Code List

This section describes the fatal error code and the possible cause for this product.

Table 1-2. Fatal Error List

Error type

ADF/Scanner

Error

code

0x01 (100001)

0x02 (100002)

0x03 (100003)

0x04 (100004)

0x05 (100005)

0x06 (100006)

0x09 (100009)

0x0A (100010)

0x0B (100011)

0x0D (100013)

0x0E (100014)

0x10 (100016)

0x11 (100017)

0x12 (100018)

0x13 (100019)

0x14 (100020)

0x20 (100032)

0x30 (100048)

Error name Possible cause

• ADF Encoder failure (contaminated/detached scale, Encoder Board

ADF PID excess speed error

ADF PID reverse error

ADF PID lock error

ADF PID acceleration lock error

ADF PID excess load error

ADF PID driving time error • Main Board failure

ADF BS+ excess speed error

ADF BS+ reverse error

ADF BS+ lock error

ADF BS+ excess load error

ADF BS+ driving time error • Main Board failure

HP detection failure

Contact detection distance exceeded

Opposite side contact detection distance exceeded error

Wrong contact detection distance error

Measurement error

LED light failure

Option error • Main Board failure

failure)

• Motor driver failure (Main Board failure)

• ADF Encoder failure (contaminated/detached scale, Encoder Board failure)

•Paper jam

• ADF Encoder failure (contaminated/detached scale, Encoder Board failure)

• Scanner Motor failure

•Paper jam

• Cable disconnection

• ADF Encoder failure (contaminated/detached scale, Encoder Board failure)

• Motor driver failure (Main Board failure)

• ADF Encoder failure (contaminated/detached scale, Encoder Board failure)

•Paper jam

• ADF Encoder failure (contaminated/detached scale, Encoder Board failure)

• Scanner Motor failure

•Paper jam

• Cable disconnection

• CIS Unit failure

• Scanner Housing failure

• Main Board failure

• Insufficient grease

• Foreign object

• FFC for CIS failure / FFC for CIS connection failure

• CIS Unit failure

• Scanner Housing failure (Including wrong attachment of the origin mark)

• Main Board failure

• FFC for CIS failure / FFC for CIS connection failure

• Motor failure

• Scanner drive mechanism was overloaded.

• Insufficient grease

• Foreign object

• Lack of gears

• Deformation of the shaft

• CIS Unit failure

• Main Board failure

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Table 1-2. Fatal Error List

Error type

ADF/Scanner

Printer

Error

code

0x36 (100054)

0x41 (100065)

0x42 (100066)

0x43 (100067)

0x44 (100068)

0x45 (100069)

0x46 (100070)

0x49 (100073)

0x4A (100074)

0x4B (100075)

0x4D (100077)

0x4E (100078)

0x51 (100081)

0x52 (100082)

0x53 (100083)

0x54 (100084)

0x55 (100085)

0x60 (000096)

0x68 (000104)

0x69 (000105)

Error name Possible cause

•Paper jam

Paper jam error

FB PID excess speed error

FB PID reverse error

FB PID lock error • ADF Encoder failure (contaminated/detached scale, Encoder Board

FB PID acceleration lock error

FB PID excess load error

FB PID driving time error • Main Board failure

FB BS+ excess speed error

FB BS+ reverse error

FB BS+ lock error

FB BS+ excess load error

FB BS+ driving time error • Main Board failure

Auto judge Fatal Error 1

Auto judge Fatal Error 2

Auto judge Fatal Error 3

Auto judge Fatal Error 4

Auto judge Fatal Error 5

Home position

Valve initialization timing contact detection error

I/S clutch action timing contact detection error

• Foreign object

• Loading/ejecting papers out of the standard range or curled papers

• Using long papers (Legal or longer)

• ADF Encoder failure (contaminated/detached scale, Encoder Board failure)

• Motor driver failure (Main Board failure)

• ADF Encoder failure (contaminated/detached scale, Encoder Board failure)

• Paper jam error

failure)

• Scanner Motor failure

• ADF drive mechanism overload (assembling failure, foreign object, lubrication failure)

• Cable disconnection

• ADF Encoder failure (contaminated/detached scale, Encoder Board failure)

• Motor driver failure (Main Board failure)

• ADF Encoder failure (contaminated/detached scale, Encoder Board failure)

• Paper jam error

• ADF Encoder failure (contaminated/detached scale, Encoder Board failure)

• Scanner Motor failure

• ADF drive mechanism overload (assembling failure, foreign object, lubrication failure)

• Cable disconnection

---*

• Carriage overload error (paper jam/foreign object)

• Deformation of the Main Frame

• Ink system failure

• CR Motor failure

• Deformation of the Front Frame

• CR Encoder failure (contaminated/detached scale, Encoder Board failure)

• Cable disconnection

• Ink system failure

• Main Board failure

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Table 1-2. Fatal Error List

Error type

Printer

Error

code

0x6B (000107)

0x7F (000111)

0x8D (000141)

0x8E (000142)

0x8F (000143)

0x93 (000147)

0x97 (000151)

0x9A (000154)

0x9B (000155)

0x9C (000156)

0x9D (000157)

0x9E (000158)

0x9F (000159)

0xE1 (000225)

0xE2 (000226)

0xE3 (000227)

0xE4 (000228)

0xE5 (000229)

Error name Possible cause

• PF Encoder failure (contaminated/detached scale, Encoder Board

PF runaway error

Inspection mode timing error

Factor error other than printer device

Driver mismatch error An unsupported driver was used

EEPROM verify error (by command)

PE Sensor error

Head drive circuit excessive voltage error

Circuit error (include blowout of a fuse)

Transistor temperature error

X-Hot detect error (pre printing)

X-Hot detect error (after flushing)

Head temperature error

Printing inspection less mode error

CR PID excess load error

CR PID excess speed error

CR PID reverse error

CR PID lock error

CR PID speed fall error

failure)

• Motor driver failure

This error occurs if the printer becomes a fatal error status due to a failure of parts other than the printer such as the scanner or ADF.

• PE Sensor failure

• Main Board failure

• Head FFC failure

• Main Board failure

• Printhead failure

• Main Board failure

This error occurs if the printing or manual cleaning are performed in Printing inspection less mode.

• CR Encoder failure (contaminated/detached scale, Encoder Board failure)

• CR Motor failure

• Carriage overload error (paper jam/foreign object)

• Cable disconnection

• CR Encoder failure (contaminated/detached scale, Encoder Board failure)

• Motor driver failure (Main Board failure)

• Slipping teeth of the CR Timing Belt

• Improper tension of the CR Timing Belt

• CR Encoder failure (contaminated/detached scale, Encoder Board failure)

• Slipping teeth of the CR Timing Belt

• Improper tension of the CR Timing Belt

• Carriage overload error (paper jam/foreign object)

• CR Encoder failure (contaminated/detached scale, Encoder Board failure)

• CR Motor failure

• Carriage overload error (paper jam/foreign object)

• Cable disconnection

• CR Encoder failure (contaminated/detached scale, Encoder Board failure)

• Motor driver failure (Main Board failure)

• Slipping teeth of the CR Timing Belt

• Improper tension of the CR Timing Belt

• Carriage overload error (paper jam/foreign object)

---*

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Table 1-2. Fatal Error List

Error type

Printer

System Error

Error

code

0xE8 (000232)

0xE9 (000233)

0xEA (000234)

0xEE (000238)

0xEF (000239)

0xF1 (000241)

0xF2 (000242)

0xF3 (000243)

0xF4 (000244)

0xF8 (000248)

0xF9 (000249)

0xFA (000250)

0xFE (000254)

0xFF (000255)

202620 WiFi error 205102 Card board error

CR load position reverse error

CR load position excess speed error

CR load position excess load error

CR PID driving time error

CR load position excess driving time error

PF PID excess load error

PF PID excess speed error

PF PID reverse error

PF PID lock error

PF load position reverse error

PF load position excess load error

PF PID driving time error

PF load position excess driving time error

Error name Possible cause

• CR Encoder failure (contaminated/detached scale, Encoder Board failure)

• Slipping teeth of the CR Timing Belt

• Improper tension of the CR Timing Belt

• Carriage overload error (paper jam/foreign object)

• CR Encoder failure (contaminated/detached scale, Encoder Board failure)

• Motor driver failure (Main Board failure)

• Slipping teeth of the CR Timing Belt

• Improper tension of the CR Timing Belt

• CR Encoder failure (contaminated/detached scale, Encoder Board failure)

• CR Motor failure

• Carriage overload error (paper jam/foreign object)

• Cable disconnection

• Main Board failure

• PF Encoder failure (contaminated/detached scale, Encoder Board failure)

• PF Motor failure

• PF drive mechanism overload (paper jam/foreign object)

• Cable disconnection

• PF Encoder failure (contaminated/detached scale, Encoder Board failure)

• Motor driver failure (Main Board failure)

• Slipping gears have occurred around the PF Motor gears.

• PF Encoder failure (contaminated/detached scale, Encoder Board failure)

• Slipping gears have occurred around the PF Motor gears.

•Paper jam

• PF Encoder failure (contaminated/detached scale, Encoder Board failure)

• PF Motor failure

• PF drive mechanism overload (paper jam/foreign object)

• Cable disconnection

• PF Encoder failure (contaminated/detached scale, Encoder Board failure)

• Slipping gears have occurred around the PF Motor gears.

• PF Encoder failure (contaminated/detached scale, Encoder Board failure)

• Motor driver failure (Main Board failure)

• Slipping gears have occurred around the PF Motor gears.

• PF Encoder failure (contaminated/detached scale, Encoder Board failure)

• PF Motor failure

• PF drive mechanism overload (paper jam/foreign object)

• Cable disconnection

• Main Board failure

WiFi board failure Card board failure

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Note "*": Not occurs except in manufacturing process

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CHAPTER 2

DISASSEMBLY/REASSEMBLY

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2.1 Overview

This chapter describes procedures for disassembling the main parts/units of ET-4550, L655/656. Unless otherwise specified, disassembled parts/units can be reassembled by reversing the disassembly procedure. See the cautions or tips for disassembly/reassembly described in "2.4 Detailed Disassembly/Reassembly Procedure

for each Part/Unit (p45)".

Read the " Safety Precautions (p3)" before disassembling and reassembling. When you have to remove units or parts that are not described in this chapter, see the exploded diagrams of SPI

(Service Parts Information).

2.1.1 Tools

Use only specified tools to avoid damaging the printer.

Name Availability EPSON Part Code

(+) Phillips screwdriver #1 O 1080530 (+) Phillips screwdriver #2 O --Flathead screwdriver O --Flathead Precision screwdriver #1 O --Tweezers O --Longnose pliers O --Nippers O ---

Note 1: Some of the tools listed above are commercially available.

2: EPSON provides the tools listed with EPSON part code.

2.1.2 Jigs

Name Q’ty EPSON Part Code

Thickness gauge (1.48mm) 1 Commercially available Thickness gauge (1.76mm) 1 Commercially available Teflon tape (thickness: 0.08 mm) 1 Commercially available Tube clip 4 Commercially available

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4 3

Front 7

Right

Left

1112

Rear

2.1.3 Locations of the Parts/Units

This section shows the locations of the main parts/units of ET-4550, L655/656.

The parts/units which can not be seen in the following pictures are indicated in dotted lines ().

 Exterior parts

No. Name No. Name

1 ADF Document Support (p39) 8 Ink Tank Unit (p39) 2 ADF Unit (p40) 9 Scanner Unit (p40) 3 Stacker Assy (p39) 10 FAX Filter Assy (p42)* 4 Panel Unit (p39) 11 Duplex Unit (p37 ) 5 Cassette Assy (p37) 12 Waste Ink Pad Assy (p39) 6 ADF LD Cover Assy (p39) 13 Hinge (p39)

Disassembly/Reassembly Overview 21

7 ADF Pad Assy (p40)

Note "*": The FAX Filter Assy is mounted only on models for some country/region.

Figure 2-1. Exterior Parts

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1 2 3

 Printer mechanism

No. Name No. Name

1 PE Sensor Lever Assy (p41) 4 Front Frame (p41) 2 Printhead (p39) 5 PF Roller (p43) 3 CR Unit (p43)

Figure 2-2. Printer Mechanism: Front

No. Name No. Name

1 CR Scale & Spring (p41) 4 CR Encoder Sensor (p43) 2 CR Timing Belt (p43) 5 PW Sensor (p43) 3 Holder Board (p39)

Figure 2-3. Printer Mechanism: Right

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1 2 3

578

No. Name No. Name

1 Main Board Assy (p41) 4 EJ Roller Gear (p41) 2 Panel FFC (p39) 5 PF Scale (p41) 3 Wireless LAN Module (p41) 6 PF Encoder (p41)

Figure 2-4. Printer Mechanism: Left

No. Name No. Name

1 Head FFC (p39) 5 Paper Guide Upper Assy (p41) 2 Tube Guide (p39) 6 Main Frame Assy (p41) 3 Ink End Sensor FFC (p41) 7 Holder Cam Assy (p41) 4 Star Wheel Holder Assy (p41) 8 CR Motor (p43)

Figure 2-5. Printer Mechanism: Rear

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7 5

2 3

Front Rear

 Ink Tank Unit

No. Name No. Name

1 Tube Guide Sheet (p44) 5 Tube Lock (p44) 2 Adapter(Bk) (p44), Adapter(C/M/Y) (p44) 6 Adapter Cover (p44) 3 Ink Supply Adapter Tube Assy (p44) 7 Tube Clamp (x3) (p44) 4 Joint (p44)

Figure 2-6. Ink Tank Unit (1)

No. Name No. Name

1 Ink Tank Cover (p39) 5 Ink Supply Tank (C/M/Y) (p44) 2 Ink Tank Housing Upper (p44) 6 Ink End Sensor Assy (p44) 3 Cap Tank (p44) 7 Ink Supply Tank (Bk) (p44) 4 Ink Tank Housing Lower (p44) 8 Ink Supply Tank Tube Assy (p44)

Figure 2-7. Ink Tank Unit (2)

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2.1.4 Standard Operation Time for servicing the product

The following are the standard operation time for servicing the product. Those are based on the MTTR result measured using a prototype of ET-4550, L655/656 that has the most functions among these product series. For ET-4550, L655/656 the standard operation time differs slightly due to the differences in structure, however, perform servicing referring to this operation standard time.

The underlined parts/units are supplied as After Service Parts.

Table 2-1. Standard Operation Time for servicing the product

Time

Parts/Unit

Replacement

Panel Unit 0:45 0:15 1:00

Panel Board 2:02 0:15 2:17 Panel Buttons 2:33 --- 2:33 LCD Unit 2:25 0:15 2:40

Panel Housing Assy 2:25 --- 2:25 Waste Ink Pad Assy Pickup Roller Assy Adapter Cover Holder Board Printhead Printhead Grounding Plate 2:12 --- 2:12 Head FFC 3:29 --- 3:29 Paper Stopper Assy 0:43 --- 0:43 ADF LD Cover Assy Gear Cover 0:52 --- 0:52 ADF Document Support Spur Gear 25.8/20.4, Combination Gear 24.9.6 1:00 --- 1:00 Bevel Gear Shaft 10.4 0:58 --- 0:58 Document Mat 0:13 --- 0:13 Stacker Assy Ink Tank Cover Ink End Sensor Lumirror Ink Tank Unit

Ink Tank Housing Lower

Cap Tank

Ink Tank Housing Upper

Ink End Sensor Assy

Ink Supply Tank (Bk, C/M/Y)

Ink Supply Tank Tube Assy Rail Cassette 3:47 --- 3:47 Tube Clamp (x3) Tube Lock Joint Adapter (Bk, C/M/Y) Tube Guide Sheet

0:37 0:12 0:49 0:11 --- 0:11 0:09 --- 0:09 0:25 --- 0:25 1:38 13:06 14:44

0:09 --- 0:09

0:19 --- 0:19

0:08 --- 0:08 0:08 --- 0:08 0:36 --- 0:36 3:04 --- 3:04 3:45 --- 3:45 0:34 --- 0:34 4:27 --- 4:27 5:23 --- 5:23 8:42 --- 8:42 8:43 --- 8:43

1:06 --- 1:06 0:28 --- 0:28 0:12 --- 0:12 2:10 --- 2:10 1:58 --- 1:58

Adjustment/

Inspection

Total

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Table 2-1. Standard Operation Time for servicing the product

Time

Parts/Unit

Replacement

Ink Supply Adapter Tube Assy 5:48 --- 5:48 Housing Upper Speaker 0:52 --- 0:52 Tube Guide Panel FFC ADF/Scanner Unit 3:03 --- 3:03

ADF Unit

ADF Hinge Holder 4:02 --- 4:02 ADF Hinge Right 4:09 --- 4:09 ADF Hinge Left 3:53 --- 3:53 Cable Holder 3:48 --- 3:48 ADF Frame Assy 5:33 --- 5:33

ADF Frame Upper Assy 6:24 --- 6:24

ADF Pad Assy

ADF Frame Lower Assy 6:24 --- 6:24

Scanner Unit

Scanner Housing Upper Assy 5:03 --- 5:03 CIS Module 5:12 --- 5:12 Combination Gear 19.2.12.6 5:18 --- 5:18 Combination Gear 18.4.9.66 5:22 --- 5:22 Scanner Carriage Unit 5:31 0:58 6:29 Scanner FFC 6:28 --- 6:28

Scanner Housing Lower Assy 6:28 --- 6:28 Hinge PS Unit Printer Mechanism 6:21 --- 6:21

Main Board Assy

Main Board Shield Plate Upper 11:13 --- 11:13

Main Board

Main Board Shield Plate Lower 11:18 --- 11:18

Holder Cam Assy 6:55 --- 6:55 CR Scale CR Driven Pulley Assy 7:33 --- 7:33 CR Scale Holder 7:17 --- 7:17 Right Frame 7:13 --- 7:13 Paper Guide Upper Assy PE Sensor Lever Assy PF Encoder Sensor PF Scale 7:11 --- 7:11 Wireless LAN Module

Read OK Read NG 11:44 20:39

Read OK Read NG 11:44 22:58

1:51 --- 1:51

3:07 --- 3:07 2:36 --- 2:36

3:41 --- 3:41

6:53 --- 6:53

3:41 0:58 4:39

3:17 --- 3:17 3:15 1:40 4:55

8:55

11:18

6:49 --- 6:49

7:12 4:03 11:15 7:17 0:12 7:29 6:56 --- 6:56

6:26 --- 6:26

Adjustment/

Inspection

1:28 10:23

1:28 12:46

Total

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Table 2-1. Standard Operation Time for servicing the product

Time

Parts/Unit

Replacement

Adjustment/

Inspection

Total

Ink End Sensor FFC EJ Roller Gear 9:03 1:45 10:48 Front Frame 10:59 5:34 16:33 Star Wheel Holder Assy 11:38 1:45 13:23

Star Wheel Holder Shield Plate 11:48 --- 11:48

Star Wheel Holder 11:48 1:45 13:33

EJ Roller 11:56 1:45 13:41 Main Frame Assy 11:20 7:18 18:38

PW Sensor Cover 11:33 --- 11:33

PW Sensor

CR Motor 12:24 0:22 12:46

CR Unit 12:35 5:12 17:47

CR Encoder Sensor 13:01 --- 13:01 CR Pressing Plate/Compression Spring3.71 13:26 --- 13:26 CR Timing Belt 12:49 --- 12:49 Carriage 14:24 5:12 19:36

Main Frame 12:35 6:45 19:20

ASF Cover Assy 11:34 --- 11:34 ASF Drive Transmission Gears 11:41 --- 11:41 PF Roller Stopper 11:41 --- 11:41 PF Roller 11:51 2:15 14:06 PF Drive Transmission Gear 12:32 --- 12:32 Planet Gear Assy 12:44 --- 12:44 Planet Release Holder Assy 13:01 --- 13:01 PF Motor Gears 11:57 --- 11:57 PF Motor 12:47 0:20 13:07

Frame Base Assy 6:21 --- 6:21

Ink System Pickup Gear 7:10 --- 7:10 Pickup Driven Shaft 7:21 --- 7:21 Stacker Guide Left 6:32 --- 6:32 Stacker Guide Right 6:32 --- 6:32 PE Sensor Cassette Sensor Pickup Lever 6:33 --- 6:33 Cassette Lock Lever/Torsion Spring 426 6:42 --- 6:42 I/F Cover 6:38 --- 6:38 FAX Unit FAX Filter Assy* 7:20 --- 7:20 FAX Filter Board

7:01 --- 7:01

11:51 2:41 14:32

7:00 --- 7:00

6:39 0:31 7:10 7:18 --- 7:18

6:49 --- 6:49

6:53 --- 6:53

Note "*": The FAX Filter Assy is mounted only on models for some country/region.

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Ink Supply Tank Assy

Ventilation Hole

Ink Supply Tank Assy

2.1.5 Checks and Precautions before Disassembling

2.1.5.1 Factors which Affect the Print Quality

HOW TO PLACE THE INK TANK ASSY WHEN DISASSEMBLING/REASSEMBLING

The film under sealing film attached on the Ink Supply Tank Assy of this printer is ventilation film. The ink in the ink tanks is vented to atmosphere through this film to keep ink supply to the Printhead stable. If the film gets wet with ink, the ink in the tanks is not properly vented and printing may not be capable.

In order to prevent this from occurring, make sure to place the Ink Supply Tank Assy as shown below after removing it.

Figure 2-8. How to Place the Ink Tank Assy

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Joint Ink Supply Tank

Ink Supply Tank Tube AssyInk Supply Adapter Tube Assy

Adapter

2.1.5.2 Factors which Affect the Safety of Service Personnel such as Ink Leakage during Operation

Ink may spill when removing the following parts from ET-4550, L655/656. This section describes the parts that may cause ink spill and the means to minimize the ink spill when removing the parts.

THE PARTS THAT MAY CAUSE INK SPILL WHEN REMOVING

Parts When ink may spill Location

Joint Removing the Ink Supply Tank Tube Assy / Ink Supply Adapter Tube Assy from

the Joint

Ink Supply Tank

Ink Supply Tank Tube Assy

Adapter Removing the Ink Supply Adapter Tube Assy from the Adapter C

Ink Supply Adapter Tube Assy

Note : These parts are indicated with the icon in disassembly/reassembly flowchart. (See "2.3 Disassembly/Reassembly Procedures

(p37)".)

• Removing the tubes of the Ink Supply Tank Tube Assy from the Joint

• Removing the tubes of the Ink Supply Tank Tube Assy from the Ink Supply Tank

• Removing the Ink Supply Adapter Tube Assy from the Joint

• Removing the Ink Supply Adapter Tube Assy from the Adapter

A, B

A, C

Figure 2-9. Location

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Carriage

Adapter

Ink path

Joint part

Tube Clip

Film

MEANS DO TO MINIMIZE THE INK SPILL

Before disassembling, confirm that the printer is in the following condition.  Adapter is removed

Before disconnecting the joint parts of the ink path, make sure that the Adapter is removed from the Carriage.

Figure 2-10. Adapter

 Adapter and Ink tube are disconnected Before disconnecting the Adapter and the Ink tube, pinch the ink tube with a Tube Clip

When touch the film on the ink path, ink may leak out from the joint part. So touch the plastic part.

Figure 2-11. Adapter and Ink tube

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Ink Tank Unit

DISCHRGING INK FROM THE INK SUPPLY TANK

Discharging ink is recommended only when disconnecting the Ink Supply Tank Tube Assy from the Ink Supply Tank. Before performing the above disconnection, discharge ink from the Ink Supply Tank as follows.

 It is recommended that the ink in the Ink Supply Tank should be d ischarged completely

before proceeding to disassembling/reassembling.

 After all the reassembling work is complete, the discharged ink of each color should be

refilled back to the Ink Supply Tank before performing the adjustment. Confirm the colors indicated on the film of the Ink Supply Tank so as not to mistake them, and make sure to refill each ink back to the correct tank from the corresponding ink supply hole.

 Necessary tools

• Containers (x 4) for each discharged ink

• Injector (with a tip of φ3.2 mm)

• Cloth

• Cotton swab (x 4)

• Tube Clip

 Discharging preparation

1. Remove the Ink Tank Cover.

2. Remove the screws (x5) that secure the Ink Tank Unit. (p 47)

3. Remove the Ink Tank Unit from the Frame Base Assy.

Figure 2-12. Discharging preparation (1)

4. Release the Tube Lock from the hooks (x 2) on the Tube Guide . (p 48)

5. Remove the screw that secures the Adapter Cover and remove the Adapter Cover. (p 47)

6. Remove the Tube Guide Sheet from the hooks (x 3) on the CR Unit. (p 48)

7. Release the Ink Supply Adapter Tube Assy from the groove on the CR Unit.

8. Remove the Adapter (x 4) from the CR Unit.

9. To minimize ink spill, pinch the Ink Supply Adapter Tube Assy with a Tube Clip.

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Cloth

Adapter

Tube Clip

Cotton swabs

Hole

Ink Supply Adapter Tube Assy

Frame Base Assy

In the next step, ink may spill from the Ink Supply Adapter Tube Assy when removing it from the Adapter. Therefore, carry out the next step somewhere other than right over the printer and be careful not to contaminate the printer and the surroundings.

10. Remove the Ink Supply Adapter Tube Assy from the Adapter.

11. Insert a cotton swab into the end of the Ink Supply Adapter Tube to prevent ink from leaking.

12. Remove the Tube Clip from the Ink Supply Adapter Tube.

13. Repeat Step 9 to Step 12 and disconnect all tubes (x 4) of the Ink Supply Adapter Tube Assy from the Adapter.

Figure 2-13. Discharging preparation (2)

In the next step, be careful not to let the cotton swabs fall off from the Ink Supply Adapter Tube.

After inserting the Ink Supply Adapter Tube, pinch it with the Tube Clip.

14. Pull out the Ink Supply Adapter Tube Assy in the direction of the arrow from the hole on the Frame Base Assy.

Figure 2-14. Discharging preparation (3)

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Injector

Ink Supply

Adapter

Tube Assy

Container

Refill hole

Holder

 Discharging procedure

1. Insert the tip of the injector to each of the refill holes on the Ink Supply Tank.

2. Suck out ink in the tanks (x 4) of the Ink Supply Tank and transfer it into the containers (x 4) by color.

Figure 2-15. D ischarging Ink (1)

3. Next, Release the Ink Supply Tank Tube from holder of the Ink Supply Tank.

Figure 2-16. D ischarging Ink (2)

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Ink Tank Unit

Tip of the Ink Supply

Adapter Tube Assy

Ink Tank Unit

4. Raise the tip of the Ink Supply Adapter Tube. And return the ink of the Ink Tube to the Ink Tank Unit..

Figure 2-17. D ischarging Ink (3)

5. Suck out all the remaining ink while inclining the Ink Tank Unit. And then transfer it to the containers.

Figure 2-18. D ischarging Ink (4)

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Main Frame

Assy

Printer

Mechanism

ADF/Scanner Unit

2. 2.

2.2 Common cautions when disassembling/reassembling the Product

This section describes common cautions when disassembling/reassembling the product. Before disassembling/reassembling the printer including this product, be sure to read " Safety Precautions (p3)"

and this section.

Item Content Photo/Illustration

When handling parts

1. When handling new parts for replacement, ta ke care n ot to contam inate or damage them.

2. When disassembling/reassembling the parts, take care not to damage the FFCs/cables/Ink tube if there is a possibility of coming into cont act with them.

3. When reassembling the product, take care not to let components of the unit come off.

When reassembling

When applying

When installing parts, take care not to damage them when securing them by tightening screws.

Do not lubricate any part other than those specified. If grease is applied on such a part, wipe it off completely. ---

grease External parts Confirm visually that there are no scratches, dirt, and gaps. --Moving parts After reassembling, confirm that there are no abnormal noises and they

work smoothly.

---

Timing belts 1. Take care not to broke them.

2. Confirm that it is installed properly onto the transmissive sections of the pinion gear/driven roller.

Motors Take care not to damage them. --Sensors 1. Take care not to touch the detector sections.

2. As for the encoder Sensor used with a circular scale, the photo sensor section should be set over the encoded area of the circular scale.

3. Take care not to get injured by the sharp ends of the board terminal on the back of the circuit boards when handling the sensors or the peripheral parts.

Scales 1. Take care not to touch the encoded area.

2. Install it with the black triangular section up. (CR Scale only)

3. Wipe off alcohol before installing. (CR Scale only)

4. Confirm that they do not touch the photo sensors after installation.

Waste ink pads

1. Take care not to stain your hands with the waste ink soaked in the ink pads. If ink comes into contact with your hands, wash it off with water immediately.

2. Take care not to stain the printer's pa rts with the waste i nk soaked in the ink pads. If ink comes into contact with the parts, wash it off. (Especially, pay attention to Paper Guide Front/Lower Porous Pad)

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Holder Cam AssyD/E Lever

Protrusion Groove

Ink Supply Tank

Housing Upper

Item Content Photo/Illustration

FFCs 1. Be sure to insert them to their connectors on the boards as far as they

will go without any loose connection such as a half-way or slant connection.

2. Route them along their routing paths.

3. If the double-sided tape that secures the FFCs is not strong enough to secure them, make sure to replace the tape and secure the FFCs firmly.

Gears When installing gears, pay attention to the following:

• The gear section should not be damaged.

• No foreign material is attached.

• No grease is attached on any parts other than those specified.

PF rollers Do not touch rollers for paper feeding when handling them.

---

One Time parts

ADF/Scanner Unit

Holder Cam Assy

After removing One Time parts specified in this manual, do not reuse them, but be sure to replace them with new ones.

When disassembling/reassembling the ADF/Scanner Unit, make sure to do the work with the unit open to prevent damage to the Hinges.

Install the assy while aligning the protrusion on the D/E Lever with the groove on the cam of the Holder Cam Assy.

Ink System 1. Take care not to stain your hands with ink.

2. When you connect the ink tube to another part, insert the ink tube up to the root of the joint to prevent ink leakage and secure the tube with the tube clamp.

3. If it's hard t o insert the ink tube to the j oint, appl y CR06 to the inserting part of the ink tube.

Ink Supply Tank

When handling the Ink Supply Tank, do not put it with the ventilation hole (A in the figure on the right) downward. (See

before Disassembling (p28)"

)

One Time icon:

---

"2.1.5 Checks and Precautions

MAC Address Label

1. Take care not to stain or damage it.

2. When replacing the Housing Upper, transfer the MAC address label to the new Housing Upper.

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Cassette Assy

Duplex Unit

2.3 Disassembly/Reassembly Procedures

2.3.1 Functional differences between models and component parts

In "2.3.2 Disassembly Flowchart (p38)", the procedures are indicated on the premise that some parts/units are removed in advance. Make sure to remove the following parts/units before sta r ting disassembly.

 Cassette Assy

 Duplex Unit

Figure 2-19. Removing the Cassette

Figure 2-20. Removing the Duplex Unit

Disassembly/Reassembly Disassembly/Reassembly Procedures 37

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Item Description Reference

Parts/unit name

White-letter

Part/unit supplied as an ASP ---

Black-letter

Part/unit not supplied as an ASP ---

Icon

Indicates a practice or condition that could result in injury or loss of life if not strictly observed.

Indicates the reference page in blue-letter

Indicates a practice or condition that could result in damage to, or destruction of equipment if not strictly observed.

Indicates the reference page in blue-letter

Indicates the parts that are inevitably broken in the disassembling procedure, and should be replaced with a new one for reassembly.

---

Indicates the parts that may cause the ink spill when they are removed.

"2.1.5 Checks and Precautions

before Disassembling (p28)"

Indicates necessary check items in the disassembling/assembling procedure.

Indicates the reference page in blue-letter

Indicates supplementary explanation for disassembly is given.

Indicates the reference page in blue-letter

Indicates particular tasks to keep quality of the units are required.

Indicates the reference page in blue-letter

Indicates particular routing of cables is required.

Indicates the reference page in blue-letter

Indicates particular adjustment(s) is/are required. Chapter 3 " Adjustment (p54)" Indicates lubrication is required. Chapter 4 " Maintenance (p65)"

Indicates the number of screws securing the parts/ units.

---

Indicates the points secured with other than a screw such as a hook, rib, dowel or the like.

---

Printer

Mechanism

1 4

(p 22) (p 43)

Main Frame Assy

---

(p 21) (p 27)

Paper Guide

Upper Assy (p29)

 CR Timing Belt  FFC/Cable * 1

Note "*": The boxes with only part names indicates the removal of such parts. If the names of FFCs or cables are

shown, disconnect the FFCs or cables from their connectors.

Black letters indicate a part/unit not supplied as an ASP.

The name enclosed in gray indicate a part/unit that must be removed on the way to the target parts.

Shows necessary procedures before removing the following parts.*

Shows the procedure number on the “FFC/ cable list”.

White letters indicate a part/unit supplied as an ASP.

Shows the screw types and the specified torque in the “Screw type/torque list”.

Shows removal/installation as a unit/assy. is available.

Reference page

2.3.2 Disassembly Flowchart

This section describes procedures for disassembling the parts/units in a flowchart format. For some parts/units, detailed procedures or precautions are provided (accordingly indicated by icons and cell's color). Refer to the explanations in the example chart below and perform an appropriate disassembling and assembling procedure. (See "2.4 Detailed Disassembly/Reassembly Procedure for each Part/Unit (p45)".) For routing cables, see "2.5 Routing FFCs/cables (p51)".

The example below shows how to see the charts on the following pages.

Disassembly/Reassembly Disassembly/Reassembly Procedures 38

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S12

START

Panel Unit

(p 46) (p 54)

 Alarm cable  Panel FFC

Housing Upper

(p 46)

 FFC/Cable* 1

ADF/Scanner

Unit

(p 45) (p 51)

 FFC/Cable* 2

Printer

Mechanism

(p 49)

(p 52) (p 54) (p 65)

Frame Base Assy

(p 65)

Waste Ink Pad

Assy

Pickup Roller

Assy

 CR Lock Release  Head FFC  CR Encoder FFC

---

(p 40)

(p 54)

---

Speaker

---

(p 46) (p 51)

Panel FFC

---

Joint (p44)

Tube Lock (p44)

(p 40)

(p 51)

Tube Guide

(p 54)

 PS Unit cable (CN501)

Hinge

---

PS Unit

---

(p 41)

---

(p 54)

---

(p 42)

When replacing the Printhead, Holder Board, Adapter or Ink Tank Unit, it is not necessary to remove the ADF/Scanner Unit. However, the replacing work should be done in a dark narrow space. If you find the work difficult, remove the ADF/Scanner Unit beforehand.

---

Adapter Cover

(p44)

Adapter(Bk)

(p44)

Adapter(C/M/Y)

(p44)

Holder Board

---

Printhead

(p 47) (p 54)

Printhead

Grounding Plate

---

Paper Stopper

Assy

(p 48) (p 65)

Panel Unit (p39)

Housing Upper

(p39)

Head FFC

(p 52)

ADF LD Cover

Assy

---

Document Mat

(p 45)

---

Stacker Assy

---

Ink Tank Cover

---

Rail Cassette

---

 Ink End Sensor FFC

Gear Cover

---

Spur Gear 25.8/

20.4

Combination

Gear 24.9.6

(p 65)

---

ADF Document

Support

---

Bevel Gear Shaft

10.4

(p 65)

---

Ink End Sensor

Lumirror

---

(p 47)

---

Ink Tank Unit

(p 47)

(p 44)

Screw type/torque list

Symbol Screw Type Torque

---

FFC/cable list

No. FFC/Cable

 Disconnect the following FFC and cable

from the connectors on the Main Board.

• Scanner FFC (CN72)

• Grounding wire

• ADF PE Sensor cable (CN76)

 Disconnect the following FFC and cables

from the connectors on the Main Board, and release their routing.

• FAX FFC (CN1)

• PE Sensor cable (CN13)

• Cassette Sensor cable

• Panel FFC Release (CN2)

• CR Motor Cable Release (CN9)

• Ink End Sensor FFC

• Tube Guide Sheet

S10

S11

S12

S13

S14

S15

S16

S17

S18

C.B.P-TITE SCREW 2x8 F/ZN-3C 4 ± 1kgf·cm

C.B.P-TITE SCREW 2x8 F/ZN-3C 6 ± 1kgf·cm

C.B.P-TITE SCREW 2.5x8 F/ZN-3C 4

C.B.P-TITE SCREW 2x5 F/ZN-3C 2 ± 0.5kgf·cm

C.B.P-TITE SCREW 3x8 F/ZN-3C 6

C.B.S-TITE SCREW 3x8 F/ZB-3C 6 ± 1kgf·cm

C.B.P-TITE SCREW 3x10 F/ZB-3C 6

C.B.P-TITE SCREW 3x10 F/ZN-3C 6 ± 1kgf·cm

C.B.P-TITE SCREW 2x6 F/ZN-3C 2 C.B.P-TITE SCREW 2x6 F/ZN-3C 6 ± 1kgf·cm C.B.S-TITEP4 SCREW 3x8 F/ZN-3C 6 C.B.P-TITES-P1 SCREW 3x12 F/ZN-3C 6 ± 1kgf·cm C.B.S-TITE SCREW 3x6 F/ZN-3C 8 C.B.S-TITE SCREW 3x6 F/ZN-3C 6 ± 1kgf·cm C.B.S-TITE SCREW 3x6 F/ZN-3C 4 C.P-TITE SCREW 3x4 F/ZN-3C 4 ± 1kgf·cm C.B.S-TITE SCREW 3x10 F/ZN-3C 4 C.B.S-TITE SCREW 2x6 F/ZN-3C 3 ± 0.5kgf.cm

± 1kgf·cm

± 0.5kgf·cm

± 1kgf·cm

± 1kgf.cm

Flowchart 2-1. Disassembly Flowchart (1)

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S11

S10

S11

S12

S13

S14

S15

S16

S17

S18

ADF Unit

(p 45)

Scanner Unit

---

(p 39)

 LCD FFC (CN4)

---

ADF LD Cover

Assy (p39)

Gear Cover

(p39)

Spur Gear 25.8/

20.4

---

Scanner

Housing Upper

Assy

Combination Gear 24.9.6 (p39) Bevel Gear Shaft

10.4 (p39)

Cable Holder

(p40)

ADF Hinge

Holder

---

ADF Hinge

Right

ADF Hinge Left

---

Cable Holder

---

 ADF PE Sensor cable

(p 45)

---

(CN71)

---

Panel Board

(p 46)

LCD Unit

---

Panel Housing

Assy

---

Panel Buttons

---

ADF Frame Assy

---

Combination

Gear 19.2.12.6

(p 46)

Combination

Gear 18.4.9.66

(p 46)

 Scanner FFC

CIS Module

(p40)

Scanner

Carriage Unit

(p 51) (p 65)

---

 Scanner FFC

CIS Module

---

Scanner FFC

(p 51)

Scanner

Housing Lower

Assy

(p 51) (p 54)

---

(p 65)

---

ADF Frame Upper Assy

---

ADF Frame Lower Assy

---

ADF Pad Assy

(p 45)

---

Screw type/torque list

Symbol Screw Type Torque

C.B.P-TITE SCREW 2x8 F/ZN-3C 4 ± 1kgf·cm C.B.P-TITE SCREW 2x8 F/ZN-3C 6 ± 1kgf·cm C.B.P-TITE SCREW 2.5x8 F/ZN-3C 4

± 1kgf·cm

C.B.P-TITE SCREW 2x5 F/ZN-3C 2 ± 0.5kgf·cm C.B.P-TITE SCREW 3x8 F/ZN-3C 6

± 1kgf·cm

C.B.S-TITE SCREW 3x8 F/ZB-3C 6 ± 1kgf·cm C.B.P-TITE SCREW 3x10 F/ZB-3C 6

± 1kgf·cm

C.B.P-TITE SCREW 3x10 F/ZN-3C 6 ± 1kgf·cm C.B.P-TITE SCREW 2x6 F/ZN-3C 2

± 0.5kgf·cm

C.B.P-TITE SCREW 2x6 F/ZN-3C 6 ± 1kgf·cm C.B.S-TITEP4 SCREW 3x8 F/ZN-3C 6

± 1kgf·cm

C.B.P-TITES-P1 SCREW 3x12 F/ZN-3C 6 ± 1kgf·cm C.B.S-TITE SCREW 3x6 F/ZN-3C 8

± 1kgf·cm

C.B.S-TITE SCREW 3x6 F/ZN-3C 6 ± 1kgf·cm C.B.S-TITE SCREW 3x6 F/ZN-3C 4

± 1kgf·cm

C.P-TITE SCREW 3x4 F/ZN-3C 4 ± 1kgf·cm C.B.S-TITE SCREW 3x10 F/ZN-3C 4

± 1kgf.cm

C.B.S-TITE SCREW 2x6 F/ZN-3C 3 ± 0.5kgf.cm

Flowchart 2-2. Disassembly Flowchart (2)

Disassembly/Reassembly Disassembly/Reassembly Procedures 40

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S13

 FFC/Cable* 3  Extension Spring

Main Board Assy

(p 49)

Right Frame

(p41)

Holder Cam

Assy (p41)

 D/E Lever & Spring

release

(p 39)

---

(p 42)

Holder Cam

Assy

S14

(p 49)

EJ Roller Gear

(p 50) (p 65)

Front Frame

 CR Timing Belt

---

CR Scale &

Spring

(p 49)

CR Driven

Pulley Assy

(p 65)

 CR Motor cable

---

Right Frame

S15

---

CR Scale Holder

S13

---

 PE Sensor Holder screw  Extension Spring

Paper Guide

Upper Assy

PE Sensor Lever

---

Assy

---

(p 54)

PF Encoder

Sensor

(p 49) (p 52)

Wireless LAN

Module

---

Ink End Sensor

FFC

(p 53)

PF Scale

---

(p 49)

Main Frame

Assy

(p 50)

(p 54) (p 65)

(p 43)

(p 54)

---

(p 43)

Star Wheel

Holder Assy

S12

(p 50) (p 54)

EJ Roller Gear

(p41)

EJ Roller

(p 54) (p 65)

---

(p 42)

---

FFC/cable list

No. FFC/Cable

 Disconnect the following FFC and cable from the connectors on the

Main Board.

• Head FFC (CN14)

• PF Encoder FFC (CN6)

• PF Motor cable (CN10)

• CR Motor cable (CN9)

• Ink End Sensor FFC (CN5)

Screw type/torque list

Symbol Screw Type Torque

C.B.P-TITE SCREW 2x8 F/ZN-3C 4 ± 1kgf·cm

C.B.P-TITE SCREW 2x8 F/ZN-3C 6 ± 1kgf·cm

C.B.P-TITE SCREW 2.5x8 F/ZN-3C 4

C.B.P-TITE SCREW 2x5 F/ZN-3C 2 ± 0.5kgf·cm

C.B.P-TITE SCREW 3x8 F/ZN-3C 6

C.B.S-TITE SCREW 3x8 F/ZB-3C 6 ± 1kgf·cm

C.B.P-TITE SCREW 3x10 F/ZB-3C 6

C.B.P-TITE SCREW 3x10 F/ZN-3C 6 ± 1kgf·cm

C.B.P-TITE SCREW 2x6 F/ZN-3C 2

S10

C.B.P-TITE SCREW 2x6 F/ZN-3C 6 ± 1kgf·cm

S11

C.B.S-TITEP4 SCREW 3x8 F/ZN-3C 6

S12

C.B.P-TITES-P1 SCREW 3x12 F/ZN-3C 6 ± 1kgf·cm

S13

C.B.S-TITE SCREW 3x6 F/ZN-3C 8

S14

C.B.S-TITE SCREW 3x6 F/ZN-3C 6 ± 1kgf·cm

S15

C.B.S-TITE SCREW 3x6 F/ZN-3C 4

S16

C.P-TITE SCREW 3x4 F/ZN-3C 4 ± 1kgf·cm

S17

C.B.S-TITE SCREW 3x10 F/ZN-3C 4

S18

C.B.S-TITE SCREW 2x6 F/ZN-3C 3 ± 0.5kgf.cm

± 1kgf·cm

± 0.5kgf·cm

± 1kgf·cm

± 1kgf.cm

Flowchart 2-3. Disassembly Flowchart (3)

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S17

S16

S15

S10

S11

S12

S13

S14

S15

S16

S17

S18

(p 39)

Ink System

(p 50)

Pickup Gear

---

Pickup Roller

Assy (p39)

Pickup Driven

Shaft

---

Stacker Assy

(p39)

---

Stacker Guide

Left

---

(p 41)

PE Sensor

---

(p 53) (p 54)

Stacker Guide

Right

---

(p 41)

---

Wireless LAN

---

Module (p41)

 Panel FFC

Pickup Roller

Assy (p39)

Cassette Sensor

S18

(p 53)

(p 41)

 EJ Grounding Spring

Star Wheel

Holder Shield

Plate

Pick Up Lever

---

Main Board Shield Plate

Upper

(p 50)

---

Star Wheel

Holder

---

Main Board

---

(p 54)

Cassette Lock

Lever/

Torsion Spring

426

---

I/F Cover

---

FAX Unit

(p 53)

---

 Fax Filter FFC

FAX Filter Assy

---

Fax Filter board

---

Only for some country/region

Screw type/torque list

Symbol Screw Type Torque

C.B.P-TITE SCREW 2x8 F/ZN-3C 4 ± 1kgf·cm C.B.P-TITE SCREW 2x8 F/ZN-3C 6 ± 1kgf·cm C.B.P-TITE SCREW 2.5x8 F/ZN-3C 4 C.B.P-TITE SCREW 2x5 F/ZN-3C 2 ± 0.5kgf·cm C.B.P-TITE SCREW 3x8 F/ZN-3C 6 C.B.S-TITE SCREW 3x8 F/ZB-3C 6 ± 1kgf·cm C.B.P-TITE SCREW 3x10 F/ZB-3C 6 C.B.P-TITE SCREW 3x10 F/ZN-3C 6 ± 1kgf·cm C.B.P-TITE SCREW 2x6 F/ZN-3C 2

± 1kgf·cm

± 0.5kgf·cm

C.B.P-TITE SCREW 2x6 F/ZN-3C 6 ± 1kgf·cm

Main Board Shield Plate

Lower

C.B.S-TITEP4 SCREW 3x8 F/ZN-3C 6 C.B.P-TITES-P1 SCREW 3x12 F/ZN-3C 6 ± 1kgf·cm

---

C.B.S-TITE SCREW 3x6 F/ZN-3C 8

± 1kgf·cm

C.B.S-TITE SCREW 3x6 F/ZN-3C 6 ± 1kgf·cm

---

The FAX Filter Assy is mounted only on models for some country/region.

C.B.S-TITE SCREW 3x6 F/ZN-3C 4

± 1kgf·cm

C.P-TITE SCREW 3x4 F/ZN-3C 4 ± 1kgf·cm C.B.S-TITE SCREW 3x10 F/ZN-3C 4

± 1kgf.cm

C.B.S-TITE SCREW 2x6 F/ZN-3C 3 ± 0.5kgf.cm

Flowchart 2-4. Disassembly Flowchart (4)

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S16

S10

S11

S12

S13

S14

S15

S16

S17

S18

(p 41)

PW Sensor

Cover

---

PW Sensor

(p 54)

 CR Motor cable

---

CR Motor

(p 51)

CR Unit

---

Main Frame

---

PF Roller

Stopper

---

PF Roller

ASF Cover Assy

---

ASF Drive

Transmission

---

Gears

---

Encoder Sensor

---

CR Pressing

Plate/

Compression

Spring3.71

---

CR Timing Belt

---

(p 50) (p 65)

PF Motor Gear

---

PF Drive

Transmission

Gear

---

S11

---

Carriage

---

PF Motor

---

(p 52)

---

Planet Gear Assy

---

Screw type/torque list

---

Symbol Screw Type Torque

Paper Guide

Front

(p 65)

Planet Release

Holder Assy

---

C.B.P-TITE SCREW 2x8 F/ZN-3C 4 ± 1kgf·cm C.B.P-TITE SCREW 2x8 F/ZN-3C 6 ± 1kgf·cm C.B.P-TITE SCREW 2.5x8 F/ZN-3C 4

± 1kgf·cm

C.B.P-TITE SCREW 2x5 F/ZN-3C 2 ± 0.5kgf·cm C.B.P-TITE SCREW 3x8 F/ZN-3C 6

± 1kgf·cm

C.B.S-TITE SCREW 3x8 F/ZB-3C 6 ± 1kgf·cm C.B.P-TITE SCREW 3x10 F/ZB-3C 6

± 1kgf·cm

C.B.P-TITE SCREW 3x10 F/ZN-3C 6 ± 1kgf·cm C.B.P-TITE SCREW 2x6 F/ZN-3C 2

± 0.5kgf·cm

C.B.P-TITE SCREW 2x6 F/ZN-3C 6 ± 1kgf·cm C.B.S-TITEP4 SCREW 3x8 F/ZN-3C 6

± 1kgf·cm

C.B.P-TITES-P1 SCREW 3x12 F/ZN-3C 6 ± 1kgf·cm C.B.S-TITE SCREW 3x6 F/ZN-3C 8

± 1kgf·cm

C.B.S-TITE SCREW 3x6 F/ZN-3C 6 ± 1kgf·cm C.B.S-TITE SCREW 3x6 F/ZN-3C 4

± 1kgf·cm

C.P-TITE SCREW 3x4 F/ZN-3C 4 ± 1kgf·cm C.B.S-TITE SCREW 3x10 F/ZN-3C 4

± 1kgf.cm

C.B.S-TITE SCREW 2x6 F/ZN-3C 3 ± 0.5kgf.cm

Flowchart 2-5. Disassembly Flowchart (5)

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S10

S11

S12

S13

S14

S15

S16

S17

S18

 Joint

Housing Lower

Housing Upper

Ink End Sensor

Ink Tank

(p 48)

Ink Tank

(p 49)

Assy

(p 39)

Cap Tank

Adapter Cover

Tube Clamp (x3)

Tube Lock

 Ink Supply Adapter

Tube Assy

 Ink Supply Tank Tube

(p 48)

---

S10

(p 47)

(p 48)

---

(p 48)

---

Assy

Joint

---

 Ink Supply Adapter

Tube Assy

Tube Lock (p44)

(p 48)

Adapter(Bk)

---

(p 47)

Adapter(C/M/Y)

---

(p 47)

Tube Guide

Sheet

(p 48)

---

(p 49)

 Ink Supply Tank Tube

Assy

Ink Supply Tank

(Bk)

(p 49)

Ink Supply Tank

Tube Assy

---

Tube Clamp

(x3) (p44)

Ink Supply

Adapter Tube

Ink Supply T ank

(C/M/Y)

Assy

---

(p 48)

---

Screw type/torque list

Symbol Screw Type Torque

C.B.P-TITE SCREW 2x8 F/ZN-3C 4 ± 1kgf·cm C.B.P-TITE SCREW 2x8 F/ZN-3C 6 ± 1kgf·cm C.B.P-TITE SCREW 2.5x8 F/ZN-3C 4

± 1kgf·cm

C.B.P-TITE SCREW 2x5 F/ZN-3C 2 ± 0.5kgf·cm

(p 49)

C.B.P-TITE SCREW 3x8 F/ZN-3C 6

± 1kgf·cm

C.B.S-TITE SCREW 3x8 F/ZB-3C 6 ± 1kgf·cm C.B.P-TITE SCREW 3x10 F/ZB-3C 6

± 1kgf·cm

C.B.P-TITE SCREW 3x10 F/ZN-3C 6 ± 1kgf·cm C.B.P-TITE SCREW 2x6 F/ZN-3C 2

C.B.P-TITE SCREW 2x6 F/ZN-3C 6 ± 1kgf·cm C.B.S-TITEP4 SCREW 3x8 F/ZN-3C 6

± 0.5kgf·cm

± 1kgf·cm

C.B.P-TITES-P1 SCREW 3x12 F/ZN-3C 6 ± 1kgf·cm C.B.S-TITE SCREW 3x6 F/ZN-3C 8

± 1kgf·cm

C.B.S-TITE SCREW 3x6 F/ZN-3C 6 ± 1kgf·cm C.B.S-TITE SCREW 3x6 F/ZN-3C 4

± 1kgf·cm

C.P-TITE SCREW 3x4 F/ZN-3C 4 ± 1kgf·cm C.B.S-TITE SCREW 3x10 F/ZN-3C 4

± 1kgf.cm

C.B.S-TITE SCREW 2x6 F/ZN-3C 3 ± 0.5kgf.cm

Flowchart 2-6. Disassembly Flowchart (6)

Disassembly/Reassembly Disassembly/Reassembly Procedures 44

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ADF/Scanner Unit

Rear

C.B.P-TITE SCREW 3x10 F/ZN-3C (6 ± 1 kgf·cm)

0 digit side

Tab

ADF Unit

ADF cable holder

Hook

ADF Hinge

Scanner

Unit

ADF Pad Assy

Hook

Bottom

ADF Pad Assy

Dowel

ADF Frame Assy

Step4

ADF PE Sensor cable

ADF PE Sensor

Dowel and Hole

C.B.P-TITE SCREW 3x8 F/ZN-3C (6 ± 1 kgf·cm)

ADF Base

Document Mat

Standard line

ADF Unit

Scanner Housing Upper Assy

Scanner Unit Upper

Scanner Housing Lower Assy

C.B.P-TITE SCREW 3x10 F/ZN-3C (6 ± 1 kgf·cm)

Scanner Unit Bottom

2.4 Detailed Disassembly/Reassembly Procedure for each Part/Unit

ADF/Scanner Unit

Remove the ADF/Scanner Unit as follows.

1. Open the ADF/Scanner Unit and remove the screw that secures the ADF/S canner Unit.

2. Release the ADF/Scanner Unit from the hinge on the 80-digit side.

3. Release the dowel on the 0-digit side of the ADF/Scanner Unit by pressing the tab outwardly and then remove the ADF/Scanner Unit by lifting it.

4. Disconnect the ADF PE Sensor cable, Scanner FFC, and grounding wire. (p 51)

ADF Unit/Scanner Unit

Release the hooks (one each) on the ADF Hinges and the hook on the ADF cable holder, and remove the ADF Unit/Scanner Unit.

ADF Pad Assy

Release the hooks (x 2) and dowels (x 2) on the ADF Pad Assy from the ADF Frame Assy, and then remove the ADF Pad Assy.

ADF Frame Assy

Remove the ADF Frame Assy as follows.

1. Remove the screws (x 2) that secure the ADF Frame Assy.

2. Release the dowels (x 2) on the ADF Frame Assy from the holes (x 2) on the ADF Base.

3. Release the ADF PE Sensor cable from the securing points of the routing. (p 51)

4. Disconnect the ADF PE Sensor cable from the ADF PE Sensor on the ADF Frame Assy, and then remove the ADF Frame Assy.

Document Mat

Attach the Document Mat on the ADF Unit with double-sided tape as shown above while aligning the mat with the standard lines.

Scanner Housing Upper Assy

Tighten the screws in the order indicated in the figure above.

Disassembly/Reassembly Detailed Disassembly/Reassembly Procedure for each Part/Unit 45

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Epson ET-4550, L655/656 Revision B

ScannerS drive gears

Extension Spring 0.526

Scanner drive leverScanner Housing Lower Assy

Panel Unit (Backface)

Panel Unit

C.B.P-TITE SCREW 3x10 F/ZB-3C (6 ± 1 kgf·cm)

Hook

Step3

Panel Board Speaker cable

Panel FFC

C.B.P-TITE SCREW 3x10 F/ZN-3C (6 ± 1kgf·cm)

Dowel and positioning hole

Panel Housing Assy Panel Board

Speaker

Housing Upper

Left

Hook

Precision driver

Right

Precision driver

Hook

Scanner Housing Lower Assy

Panel Unit

Install the Scanner driver gears, scanner drive lever, and Extension Spring 0.526 as shown above.

Panel Board

Speaker

Remove the Panel Unit as follows.

1. Remove the screws (x 2) that secure the Panel Unit.

2. Release the hooks (x 3) on the Panel Unit, and detach the Panel Unit.

3. Disconnect the Panel FFC and the Speaker cable from the connectors on the backface of the Panel Board, and remove the Panel Unit.

Housing Upper

 When reassembling, align the dowels on the Panel Housing

Assy with the positioning holes on the Panel Board.

 Tighten the screws in the order indicated in the figure above.

When handling the Speaker, do not pinch the middle of the woofer cone but make sure to hold it by the rim.

Since the Housing Upper is secured by the hooks (x 2) shown above, release the hooks with a precision screwdriver or a similar tool when removing the Housing Upper.

Disassembly/Reassembly Detailed Disassembly/Reassembly Procedure for each Part/Unit 46

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Epson ET-4550, L655/656 Revision B

CR Unit

Section A

CR Unit

C.B.P-TITE SCREW 2.5x8 F/ZN-3C (4 ± 1 kgf·cm)

Printhead

Head FFC

80 digit side

Adapter Cover

C.B.P-TITE SCREW 2x6 F/ZN-3C (6 ± 1 kgf·cm)

Dowel and positioning hole

Hook

Adapter

Film

0.5 mm or less

Adapter

Ink Supply Adapter Tube

Connection of Ink

Supply Adapter

Tube Assy

Ink Supply Adapter

Tube Assy

C.B.P-TITE SCREW 3x10 F/ZB-3C (6 ± 1 kgf·cm)

Back

Hook

Ink End Sensor FFC

Magnified image of installed lumirror

Ink End Sensor Lumirror

Hook

Ink End

Sensor FFC

Ink End Sensor Lumirror

A C

Bottom of Ink End Sensor Assy

Ink End

Sensor FFC

Rib D

Rib E

Ink End

Sensor Lumirror

Ink End

Sensor Assy

Ink End Sensor Lumirror

Printhead

After printing, waste ink may easily collect in Section A on the CR Unit shown above. When removing the Printhead, take extreme care not to let the terminal of the Head FFC disconnected from the Printhead touch the area around Section A. Be careful in the same manner when replacing the Print Mechanism and transferring the Printhead.

If the Head FFC is connected with the terminal contaminated with waste ink, the print circuit boards may be short-circuited. Therefore, if waste ink is attached on the terminal, make sure to wipe it off completely with a dry cloth or the like.

 Before installing the Printhead, move the CR Unit to the 80-digit side.  Tighten the screws in the order given in the figure above.

Adapter Cover

When removing/replacing the Adapter Cover, not to apply excessive



downward force when tightening the screws. Frame may be deformed by applying force perpendicularly when tightening the screws and it may affect print quality.

Remove the Adapter Cover as follows.

1. Remove the screw (x 1) that secure the Adapter Cover.

2. Remove Adapter Cover by sliding it in the arrow’s direction. When attaching Adapter Cover, align the dowels (x 2) on it with

the positioning holes on CR Unit.

Otherwise, theMain

Adapter

 Be careful not to damage or peel off the film of the Adapter.  When removing Ink Supply Adapter Tube Assy, be careful not

to contaminate the surroundings because ink may spill from the tubes.

Use a precision screwdriver when releasing the hooks of the Adapter.

When connecting the Ink Supply Adapter Tube Assy to the Adapter, insert each tube fully and make sure the gaps between the end of tubes and the Adapter are 0.5 mm long or less.

Ink Tank Unit

 Remove Ink Tank Unit carefully because Ink End Sensor FFC is connected to it.  Take care not to damage Ink End Sensor FFC when routing it because the FFC is right-sized and does not have any extra length. (See " Ink End

Sensor FFC (2) (p53)".)

Before removing Ink Tank Unit, remove the screws (x 5) and disengage the hooks (x 2) on the bottom.

Disassembly/Reassembly Detailed Disassembly/Reassembly Procedure for each Part/Unit 47

Remove the Ink End Sensor Lumirror as follows:

1. Disengage (A) of Ink End Sensor Lumirror from the rib D on Ink End Sensor Assy.

2. Release (B) of Ink End Sensor Lumirror from the hook on Ink End Sensor Assy.

3. Disengage (C) of Ink End Sensor Lumirror from the rib E on Ink End Sensor Assy and remove Ink End Sensor Lumirror.

Ink End Sensor Lumirror

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Epson ET-4550, L655/656 Revision B

Ink Tank Housing Lower

C.B.P-TITE SCREW 3x10 F/ZN-3C (6 ± 1 kgf·cm)

Hook

Note: Ink Supply Tank in photo above is not charged with ink.

Slider Base

Paper Stopper Assy

Paper Stopper

Stopper lever

Cam SliderExtension Spring 1.59

Compression Spring1.99

Tube Guide

Hook Dowel

Tube Guide Sheet

Step 3

Hook

Tube Guide

Tube Lock

Step 8

Ink Supply

Adapter Tube

Assy

Tube Guide Sheet

Hole and Hook

CR Unit

Step 7

0.5 mm or less

Ink Supply Adapter Tube

Joint

0.5 mm or less

Step 8

Ink Supply Tank Tube

Tube Clamp

Ink Supply Tank Tube

Black

C, M, Y

Tube Clamp

Tube Lock

Ink Supply Adapter Tube Assy

To adapter To tank

Groove on CR Unit

Step 1, 2

Cap Tank

45 degrees

3 mm or less

Ink Tank Housing Lower

Paper Stopper Assy

Ink Supply Adapter Tube Assy / Tube Guide Sheet / Joint / Tube Lock / Tube Clamp

Remove the Ink Tank Housing Lower as follows:

1. Remove the screws (x 2) that secure the Ink Tank Housing

2. Disengage the hooks (x 2) and remove Ink Tank Housing

Lower.

If any of the parts of the Paper Stopper Assy 1st/2nd comes off when removing it, be sure to reassemble the Paper Stopper Assy 1st/2nd as shown above.

Cap Tank

When connecting the Cap Tank to the Ink Tank Housing Upper, insert each cap fully and make sure the gaps between the end of caps and the Ink Tank Housing Upper are 3 mm long or less.

Disassembly/Reassembly Detailed Disassembly/Reassembly Procedure for each Part/Unit 48

To prevent damage to Cap Tank, attach it with the knob at an angle of 45 degrees.

1. Attach Tube Clamp while align it with the markings (x 3) on Ink Supply Adapter Tube Assy as shown above.

2. Attach Tube Lock onto Ink Supply Adapter Tube Assy.

3. Align the holes on Tube Guide Sheet with the dowels (x 2) on Tube Guide and secure them with the hooks (x 2).

4. With the opening on Tube Clamp facing Tube Guide Sheet, attach Ink Supply Adapter Tube Assy onto Tube Guide.

5. Connect Ink Supply Adapter Tube Assy with Adapter and secure it with the groove on CR Unit.

6. Engage the holes (x 3) on Tube Guide Sheet with the hooks (x 3) on CR Unit, secure them by sliding it in the arrow's direction.

7. Connect Ink Supply Adapter Tube Assy with Joint.

8. Secure Tube Lock with the hooks (x 2) on Tube Guide.

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Epson ET-4550, L655/656 Revision B

Ink Tank HousingUpper

Hook C.B.P-TITE SCREW 3x10 F/ZN-3C (6 ± 1 kgf·cm)

Groove

C.B.P-TITE SCREW 3x8 F/ZN-3C (6 ± 1 kgf·cm)

1 mm or less

Back

Ink Supply Adapter Tube

Ink Supply Tank

Ink End Sensor Assy

0 digit side

Printer Mechanism

80 digit side

C.B.P-TITE SCREW 3x10 F/ZN-3C (6 ± 1 kgf·cm) C.B.P-TITE(S-P1) SCREW 3x12 F/ZN-3C (6 ± 1 kgf·cm)

Screw (x2)

Side view of CR Unit

Slit of CR Encoder

Black mark

CR Scale

CR Unit

Holder Cam AssyD/E Lever

Protrusion Groove

Main Frame

PF Encoder Sensor

C.B.P-TITE SCREW 2x8 F/ZN-3C (4 ± 1 kgf·cm)

PF Scale

PF Roller PF Encoder

Sensor

PF Scale

PF Roller

C.B.S-TITE SCREW 3x6 F/ZN-3C (4 ± 1 kgf·cm)

Main Board Assy

C.B.S-TITE SCREW 3x6 F/ZN-3C (8 ± 1 kgf

·cm)

Ink Tank Housing Upper

Remove the Ink Tank Housing Upper as follows:

1. Remove Cap Tank.

2. Remove the screws (x 2) that secure the Ink Tank Housing Upper.

3. Disengage the hooks (x 2) and remove Ink Tank Housing Upper.

Ink End Sensor Assy / Ink Supply Tank

Remove the Ink End Sensor Assy as follows:

1. Remove the screws (x 4) that secure the Ink End Sensor Assy.

2. Remove Ink End Sensor Assy by sliding it in the arrow's direction.  When connecting the Ink Supply Tank Tube Assy to the Ink

Supply Tank, insert each tubes fully and make sure the gaps between the end of tubes and the Ink Supply Tank are 1 mm long or less.

 Attach Ink End Sensor Assy while aligning it with the groove

on Ink Supply Tank, and secure the assy with the screw (x 4).

Printer Mechanism

When removing the Printer Mechanism, remove the screws (x 9) shown above.

 Take utmost care not to catch cables/FFCs.  Tighten the screws in the order given in the figure above.

CR Scale

Holder Cam Assy

PF Encoder Sensor/PF Scale

Main Board Assy

 When attaching the PF Scale, if the double-sided tape does not

Disassembly/Reassembly Detailed Disassembly/Reassembly Procedure for each Part/Unit 49

 Attach with the black triangle on the upper left corner.  Set through the slit on the CR Encoder.

 When reassembling, align the cam slit on t he Holder Cam Assy

with the protrusion on the D/E Lever.

 After installing the Holder Cam Assy, make sure that the

Holder Cam Assy operates normally.

have sufficient adhesive power or is contaminated, make sure to replace the tape.

 Make sure to attach the PF Scale correctly perpendic ular to t he

PF Roller.

 After installing the PF Encoder Sensor, make sure that the PF

Scale is not in contact with the PF Encoder Sensor.

Tighten the screws in the order indicated in the figure above.

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Epson ET-4550, L655/656 Revision B

Main Board Shield Plate Upper

C.B.S-TITE SCREW 3x6 F/ZN-3C (4 ± 1 kgf·cm) C.P SCREW 3x4 F/ZN-3C (4 ± 1 kgf·cm) C.B.S-TITE SCREW 3x10 F/ZN-3C (4 ± 1 kgf·cm)

Bottom

EJ RollerEJ Roller Gear

Star Wheel Holder Assy

EJ grounding spring

80 digit side

C.B.P-TITE(SP-1) SCREW 3x12 F/ZN-3C (6 ± 1 kgf·cm)

PF Roller grounding springPF Roller

Rear

D/E Lever

Cutout

CR unit

C.B.P-TITE SCREW 3x10 F/ZN-3C (6 ± 1 kgf·cm)

Bottom of CR Unit

Rail

80 digit side

Guide

Nozzle plate surface of Printhead

Main Frame Assy

Section B

Ink Tube

Rib

Align the marking

Right Frame

C.B.S-TITE SCREW 3x6 F/ZN-3C (4 ± 1 kgf·cm)

C.B.S-TITE SCREW 3x6 F/ZN-3C (8 ± 1 kgf·cm)

Hook and Hole

Main Board Shield Plate Upper

EJ Roller Gear

Star Wheel Holder Assy

PF Roller

Tighten the screws in the order indicated in the figure above.

Insert the EJ Roller Gear fully into the EJ Roller to make it secur ed completely.

Main Frame Assy

 Attach the EJ grounding spring as shown above.  Tighten the screws in the order indicated in the figure above.

Ink System

Attach the PF Roller grounding spring as shown above.

Right Frame

Remove the PW Sensor, CR Unit and so on without removing the Main Frame Assy as much as possible when removing them because section B on the Paper Guide Front Assy is deformed when the screw of 80-digits side is removed.

If removing the Main Frame Assy, remove it as follows.

1. Move the CR Unit to the end of the 80-digit side, and detach the rails (x 2) of the CR Unit from the guides on the Front Frame.

2. Remove the D/E Lever by sliding it to the 0-digit side and aligning the shape of the lever with the cutout on the Main Frame Assy.

3. Release the CR Motor cable from the hook on the Main Frame Assy. (p 51)

4. Release the Head FFC from the hook on the Front Frame. (p 52)

5. Remove the screws (x 2) that secure the Main Frame Assy, and remove the Main Frame Assy.

Disassembly/Reassembly Detailed Disassembly/Reassembly Procedure for each Part/Unit 50

When routing the Ink Tube, be careful about the following.

 Route through the ribs (x 3) on the Frame Base Assy.  Make sure that the Ink Tube is not folded in any part.  Align the marking of the ink tube with the hole of the Frame

Base Assy.

When reassembling, align the hooks on the Main Frame/Front Frame with the positioning holes on the Right Frame.

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Epson ET-4550, L655/656 Revision B

ADF/Scanner Unit

Main Board Assy

Scanner FFCGrounding wire

ADF PE Sensor cable

ADF Frame Assy

ADF PE Sensor

cable

ADF PE Sensor cable

Hole Rib ADF Base

Scanner Housing Lower Assy

Rib Cable guide

Scanner FFC Ferrite core

Scanner GND wire GND terminalHole

Double-sided tape

Rib

Scanner Carriage Unit

CIS Module

Scanner FFC

FFC guide

Scanner encoder sensorScanner FFC

Hook

CR Motor

CR Motor cable

Main BoardCR Motor cable

CR Motor cable Printer Mechanism

Rib Double-sided tape

Frame Base Assy

Panel FFCRear

Speaker cable

Panel FFC

2.5 Routing FFCs/cables

ADF/Scanner Unit

Connect the Scanner FFC, ADF PE Sensor cable, and grounding wire to their connectors on the Main Board Assy as shown above.

ADF Frame Assy

Route the ADF PE Sensor cable through the rib and then through the hole on the bottom of the ADF Base, and then connect it to the ADF PE Sensor on the ADF Frame Assy.

Scanner Housing Lower Assy

 Scanner FFC

• Route through the ribs (x 11) on the Scanner Housing Lower Assy.

• Set the ferrite core in the position shown below and secure it with double-sided tape.

 Scanner grounding (GND) wire

• Set the grounding (GND) terminal in the position shown above.

• Route through the cable guides (x 3), then through the hole on the Scanner Housing Lower Assy.

Scanner Carriage Unit

CR Motor cable

Speaker cable/Panel FFC



Route the Scanner FFC through the ribs (x 2) on the Scanner Carriage Unit.

 Route the Scanner FFC through the FFC guide and connect to CN1 on

Scanner encoder sensor Connect the Scanner FFC to the CIS Module aligning with the folds on the FFC.



Route through the hooks (x 9) on the Printer Mechanism, and connect to the connector (CN9) on the Main Board.

 Speaker cable Route through the rib on the Frame Base Assy.  Panel FFC Route behind the ribs (x 4) on the Frame Base Assy and secure at the points (x2) above with double-sided tape.

Disassembly/Reassembly Routing FFCs/cables 51

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CR Unit

Head FFC

CR Encoder

Sensor

CR Encoder FFC

CR Encoder

Rear

Side

CR Unit

Head FFC

CR Encoder FFC

CR Unit

Hook Hole Double-sided tape

Front Frame

CR Encoder FFC

Main Board Assy

Rear

Head FFC

Main Board Assy

Rear

Front Frame

Holder Board

PS Unit cable Ferrite core

Cassette Sensor

cable

FAX FFC

PE Sensor cable

CR Motor cable Wrap 1 turn

Printer Mechanism

Hook Rib

Main Board Assy

Frame Base Assy

PF Encoder Sensor FFC

Double-sided tape

Left side of Printer Mechanism

PF Motor

cable

PF Motor cable Main Board

Groove Rib Hook

Paper Guide

Front

Main

Board Assy

Head FFC / CR Encoder FFC

Printer Mechanism

 PE Sensor cable: Route through the hook on the Main Board Assy and connect to the connector (CN13) on the Main Board Assy.  Cassette Sensor cable: Route through the hook on the Main Board Assy and connect to the connector (CN16) on the Main Board Assy.

FAX FFC: Route along the FFC’s folds and through the hooks on the Main Board Assy and connect to the connector (CN1) on the Main Board Assy.

  PS Unit cable: Connect to the connector (CN501) on the Main Board Assy, and route through the hook on the Main Board Assy, and then set the

ferrite core in the position shown above.

 CR Motor cable: Route through the rib on the Frame Base Assy and wrap one turn around the hook on the Frame Base Assy.

 Route the Head FFC as follows:

1. Connect to the connector on the Printhead, and then install the Printhead. (p 47)

2. Route the hole on the CR Unit, then route through the hooks (x 3) on the side of the CR Unit.

3. Route through the hooks (x 4) on the Main Board Assy and Front Frame, then connect to the connector (CN14) on the Main Board Assy.  Route the CR Encoder FFC as follows:

1. Route through the hole on the CR Unit and connect it to the connector (CN1) on the CR Encoder.

2. Route through the hooks (x 3) on the side of the CR Unit.

3. Attach the Holder Board.

4. Route through the hooks (x 4) on the Main Board Assy and Front Frame, then secure with double-sided tape on the Front Frame at the positions (x 2) shown above.

5. Connect to the connector (CN17) on the Main Board Assy.

PF Encoder Sensor FFC

Secure the PF Encoder Sensor FFC with double-sided tape at the point shown above, and connect it to the connector (CN6) on the Main Board Assy.

PF Motor cable

 Route through the grooves (x 5) and the rib on the Paper Guide Front.  Route through the hook on the Main Board Assy and connect to the

connector (CN10) on the Main Board Assy.

Disassembly/Reassembly Routing FFCs/cables 52

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FAX FFC

Rib Double-sided tape

Frame Base Assy

FAX Unit

Frame Base Assy

Rib Hook Groove

PE Sensor

PE Sensor cable

80-digit side

Main Board

CN5

Rib Double-sided tape

0-digit side

Frame

Base Assy

Frame

Base Assy

Ink End Sensor FFCInk End Sensor FFC

Inside of Frame Base Assy

Ink End Sensor FFC

Hook Hole

Ink Tank Housing Upper

Ink Supply Tank

Ink End Sensor Assy

Ink End

Sensor FFC

CN1

Rib Hook Cutout

Top

Ink End Sensor FFC

Ink End

Sensor Assy

Rib Hole Groove

Frame Base Assy

Cassette Sensor

Bottom

Cassette Sensor cable

FAX Unit

PE Sensor

Ink End Sensor FFC (1)

Route the FAX FFC along the rib on the Frame Base Assy, and secure it with double-sided tape at the point shown above.

Ink End Sensor FFC (2)

Route the PE Sensor cable through the ribs (x2), hook, and groove on the Frame Base Assy.

Route the Ink End Sensor FFC as follows from the 80 digit side.

80-digit side:



Connect to the connector (CN5) on the Main Board and secure with double-sided tape at the point shown above.

 Center: Route along the folds of the Ink End Sensor FFC and secure with double-sided tape (x 2) at the points on the Front Frame shown above.

0-digit side:



Route along the folds of the Ink End Sensor FFC and through the hole on the Frame Base Assy, and then route through the hook.

Cassette Sensor

Route the Ink End Sensor FFC as shown below.

1. Route from the bottom of the Ink End Sensor Assy upward through the cutout.

2. Route through the rib (x 1) and hook (x 1) on the Ink End Sensor Assy, and then connect to the connector (CN1) as shown above.

Disassembly/Reassembly Routing FFCs/cables 53

Route the Cassette Sensor cable as shown below:

1. Route through the rib and into the hole on the bottom of the Frame Base Assy.

2. Pull out from the hole on the other side and route through the ribs (x 3) and grooves (x 2) on the Frame Base Assy.

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CHAPTER 3

ADJUSTMENT

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Epson ET-4550, L655/656 Revision B

3.1 Required Adjustments

The table from the following page lists the required adjustments depending upon the parts being repaired or replaced. Find the part(s) you removed or replaced, and check which adjustment(s) must be carried out.

 When performing the adjustment with printing and feeding papers, conform

information of paper in the printer to the size and type of paper set in the cassette.

 After all required adjustments are completed, use the “Final check pattern print”

function to print all adjustment patterns for final check. If you find a problem with the printout patterns, carry out the adjustment again.

 When replacing the Main Board and the Printer Mechanism at the same time, the

adjustment should be made after performing the initial setting.

 The table items and marks used in the “Required Adjustment List” provided on the

following pages have the following meanings.

• “---” indicates that the adjustment is not required.

• The “Mechanism Adjustment” should be performed just after reinstalling or reassembling the part or unit.

• The “Adjustments using the Adjustment Program” need to be performed after reassembling the printer completely.

 If you have removed or replaced multiple parts, make sure to check the required

adjustments for the all parts. And when multiple adjustments must be carried out, be sure to carry out them in the order given in the “Priority” row.

Adjustment Required Adjustments 55

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OK NGNG

-2

-1

0 1 2

Table 3-1. Required Adjustment List

Adjustment Type

Adjustment Item

Cassette Assy

Duplex Unit

Panel Unit

Waste Ink Pad Assy

Printhead

Part Name

Interface Board

Scanner Unit

PS Unit

Priority 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Purpose

Remove Replace Remove Replace Remove Replace Remove Replace Remove Replace Remove Replace Remove Replace Remove Replace

Mechanism adjustment

Checking

the

Platen Gap

Check if the PG is within the standard.

---

--O O

---

Adjustment using the Adjustment Program

EEPROM

data copy

To copy adjustment values or the like stored on the old Main Board to the new board when the Main Board needs to be replaced.

Initialize

Setting

(MAC address

setting)

To write saledestinationspecific settings and the serial number into the Main Board after replacing it

Head ID input Ink charge

To correct characteristic variation of the replaced Printhead by entering its Printhead ID

To fill ink inside the new Printhead to make it ready for print after replacing the Printhead.

(Head ID).

Maintenance counter reset

To reset the waste ink counter after replacing the Waste Ink Pad Assy.

PE Detector

confirmation

Confirm the PE sensor's chattering after detecting the end of the paper falls within the specified period.

PF/EJ

adjustment

To correct variations in paper feed accuracy to achieve higher print quality.

First dot position /

PW adjustment

To correct the mounting position of the PW Sensor on a software basis to adjust the detection position and Nozzle position dispersion.

Bi-D

adjustment

To correct print start timing in bidirectional printing through software control.

Head angular

adjustment

To correct tilt of the Printhead caused at the installation through software control.

PF band

adjustment

To correct variations in paper feed accuracy to achieve higher print quality in band printing.

adjustment

To correct the paper detection positions and the mounting positions of the PE Sensor by software control.

deterioration

offset

To reset the counter or set it to its maximum according to the replaced parts.

deterioration

offset

Corrects the amount of light using software to adjust the deterioration of the sensor by mist or similar causes.

CR motor

heat

protection

control

To measure and correct the electrical variation of each motor and the power supply board.

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- --- --- O --- --- O --- --- --- --- --- ---

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- --- O O --- --- O O --- --- --- --- ---

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- O --- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- --- --- --- O O --- --- --- --- --- --- ---

--- --- O O --- --- O O O O O O --- --- --- --- ---

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

--- O --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- O

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- --- --- --- --- --- --- --- --- --- O O O

PF motor

heat

control

SCN motor

heat

protection

control

How to judge

Adjustment program

Tool

See " 3.3.1

Checking the Platen Gap (p62)" for the

details.

Thickness

gauge,

Teflon tape

-2 -1 0 1 2

-2

-1

--- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- ---

Examine the printout patterns and enter the value for the pattern with no overlap and gap between the two rectangles.

PW Adjustment

Examine the misaligned lines printed on top, bottom, left, and right of the paper, and enter the number beside the line that is exactly 5 mm away from the paper edge for each side.

1st dot adjustment

Examine the lines on the left side of paper, and enter the number beside the line that overlaps with

-2 -1 0 1 2

Examine the printout patterns for each of the four modes, and enter the value for the pattern with no gap and overlap for each mode.

the horizontal line.

NGOK

Band pattern

Enter the values of the most straight lines.

Microweave

pattern

Enter the value for the group of which the gaps between the two color bars are the smallest.

Examine the printout patterns and enter the value for the pattern with no overlap and gap between the two rectangles.

--- --- --- --- --- ---

OOOOOOO O OOOOOOOOO

--- --- --- --- --- --- --- Ruler --- --- --- --- --- --- --- --- ---

Adjustment Required Adjustments 56

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OK NGNG

-2

-1

0 1 2

Table 3-1. Required Adjustment List

Check if the PG is within the standard.

Mechanism adjustment

Checking

the

Platen Gap

EEPROM

data copy

To copy adjustment values or the like stored on the old Main Board to the new board when the Main Board needs to be replaced.

Initialize

Setting

(MAC address

setting)

To write saledestinationspecific settings and the serial number into the Main Board after replacing it

Head ID input Ink charge

To correct characteristic variation of the replaced Printhead by entering its Printhead ID

To fill ink inside the new Printhead to make it ready for print after replacing the Printhead.

(Head ID).

Maintenance counter reset

To reset the waste ink counter after replacing the Waste Ink Pad Assy.

PE Detector

confirmation

Confirm the PE sensor's chattering after detecting the end of the paper falls within the specified period.

PF/EJ

adjustment

To correct variations in paper feed accuracy to achieve higher print quality.

Adjustment using the Adjustment Program

First dot position /

PW adjustment

To correct the mounting position of the PW Sensor on a software basis to adjust the detection position and Nozzle position dispersion.

Bi-D

adjustment

To correct print start timing in bidirectional printing through software control.

Head angular

adjustment

To correct tilt of the Printhead caused at the installation through software control.

PF band

adjustment

To correct variations in paper feed accuracy to achieve higher print quality in band printing.

adjustment

To correct the paper detection positions and the mounting positions of the PE Sensor by software control.

deterioration

offset

To reset the counter or set it to its maximum according to the replaced parts.

deterioration

offset

Corrects the amount of light using software to adjust the deterioration of the sensor by mist or similar causes.

CR motor

heat

protection

control

PF motor

heat

protection

control

To measure and correct the electrical variation of each motor and the power supply board.

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

---

--O

--- --- --- --- --- --- O --- O O O --- --- --- --- --- ---

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- O --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

O --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

--- O O --- O O O O O O O O O O O O O

--- --- --- --- --- --- O --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- --- O --- --- --- O --- --- --- --- --- ---

--- --- --- --- --- --- --- O O --- --- --- --- --- --- --- ---

SCN motor

heat

protection

control

Adjustment Type

Priority 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Adjustment Item

Purpose

Paper Guide Upper Assy

PE Sensor Lever Assy

Main Board

Part Name

EJ Roller Gear

Front Frame

Remove Replace Remove Replace Remove Replace

(EEPROM Read OK)

Replace (EEPROM Read NG)

Remove Replace Remove Replace

How to judge

Adjustment program

Tool

See " 3.3.1

Checking the Platen Gap (p62)" for the

details.

Thickness

gauge,

Teflon tape

-2 -1 0 1 2

-2

-1

--- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- ---

Examine the printout patterns and enter the value for the pattern with no overlap and gap between the two rectangles.

PW Adjustment

Examine the misaligned lines printed on top, bottom, left, and right of the paper, and enter the number beside the line that is exactly 5 mm away from the paper edge for each side.

1st dot adjustment

Examine the lines on the left side of paper, and enter the number beside the line that overlaps with

-2 -1 0 1 2

Examine the printout patterns for each of the four modes, and enter the value for the pattern with no gap and overlap for each mode.

the horizontal line.

NGOK

Band pattern

Enter the values of the most straight lines.

Microweave

pattern

Enter the value for the group of which the gaps between the two color bars are the smallest.

Examine the printout patterns and enter the value for the pattern with no overlap and gap between the two rectangles.

--- --- --- --- --- ---

OOOOOOO O OOOOOOOOO

--- --- --- --- --- --- --- Ruler --- --- --- --- --- --- --- --- ---

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OK NGNG

-2

-1

0 1 2

Table 3-1. Required Adjustment List

Adjustment Type

Priority 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18

Adjustment Item

Purpose

Star Wheel Holder Assy

Main Frame Assy

PW Sensor

Part Name

Paper Guide Lower Porous Pad

PE Sensor

Remove Replace Remove Replace Remove Replace Remove Replace Remove Replace

Mechanism adjustment

Checking

the

Platen Gap

Check if the PG is within the standard.

---

--O O

---

Initialize

EEPROM

data copy

Setting

(MAC address

Head ID input Ink charge

Maintenance counter reset

PE Detector

confirmation

PF/EJ

adjustment

setting)

To copy adjustment values or the like stored on the old Main Board to the new board when the Main Board needs to be replaced.

To write saledestinationspecific settings and the serial number into the Main Board after replacing it

To correct characteristic variation of the replaced Printhead by entering its Printhead ID (Head ID).

To fill ink inside the new Printhead to make it ready for print after replacing the Printhead.

To reset the waste ink counter after replacing the Waste Ink Pad Assy.

Confirm the PE sensor's chattering after detecting the end of the paper falls within the specified period.

To correct variations in paper feed accuracy to achieve higher print quality.

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- --- O --- --- --- O --- --- --- --- --- ---

--- --- --- --- --- O --- O --- --- --- --- --- --- --- --- ---

--- --- --- --- --- O O O O O O O --- O O --- ---

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- --- --- O --- --- --- O --- O --- --- ---

Adjustment using the Adjustment Program

First dot position /

PW adjustment

To correct the mounting position of the PW Sensor on a software basis to adjust the detection position and Nozzle position dispersion.

Bi-D

adjustment

To correct print start timing in bidirectional printing through software control.

Head angular

adjustment

To correct tilt of the Printhead caused at the installation through software control.

PF band

adjustment

To correct variations in paper feed accuracy to achieve higher print quality in band printing.

adjustment

To correct the paper detection positions and the mounting positions of the PE Sensor by software control.

deterioration

offset

To reset the counter or set it to its maximum according to the replaced parts.

deterioration

offset

Corrects the amount of light using software to adjust the deterioration of the sensor by mist or similar causes.

CR motor

heat

protection

control

PF motor

heat

protection

control

To measure and correct the electrical variation of each motor and the power supply board.

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- O --- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- --- O --- --- --- --- --- O --- --- --- --- ---

SCN motor

heat

protection

control

How to judge

Adjustment program

Tool

See " 3.3.1

Checking the Platen Gap (p62)" for the

details.

Thickness

gauge,

Teflon tape

-2 -1 0 1 2

-2

-1

--- --- --- --- --- --- --- --- --- --- --- ---

--- --- --- --- --- ---

Examine the printout patterns and enter the value for the pattern with no overlap and gap between the two rectangles.

PW Adjustment

Examine the misaligned lines printed on top, bottom, left, and right of the paper, and enter the number beside the line that is exactly 5 mm away from the paper edge for each side.

1st dot adjustment

Examine the lines on the left side of paper, and enter the number beside the line that overlaps with

-2 -1 0 1 2

Examine the printout patterns for each of the four modes, and enter the value for the pattern with no gap and overlap for each mode.

the horizontal line.

NGOK

Band pattern

Enter the values of the most straight lines.

Microweave

pattern

Enter the value for the group of which the gaps between the two color bars are the smallest.

Examine the printout patterns and enter the value for the pattern with no overlap and gap between the two rectangles.

--- --- --- --- --- ---

OOOOOOO O OOOOOOOOO

--- --- --- --- --- --- --- Ruler --- --- --- --- --- --- --- --- ---

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3.2 Adjustment Program

This section provides the operating environment, functions related to safety and privacy policy, and the adjustment item newly added of the Adjustment Program. See "3.1 Required Adjustments (p55)" for the adjustments not explained here.

3.2.1 Operating Environment

The operating environment for the Adjustment Program is as follows.

OS: Windows Vista, 7, 8, 8.1

  Interface: USB

3.2.2 Details of the Adjustment Program

Refer to the guide in the Adjustment Program for the details of the procedure.

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Check the check box of the replaced parts.

Perform button

Check the check box of the replaced parts.

Perform button

Check the check box of the replaced parts.

3.2.2.1 CR Motor Heat Protection Control / PF Motor Heat Protection Control

Purpose To measure the manufacturing variations of the DC motors (CR Motor/PF Motor), Main Board and Power

Supply Board to determine the correction value used for estimating the current values of the motors.

Risks if the adjustment is not correctly made

Procedure 1. Select from the menu of the Adjustment Program. Check the check box of the replaced parts and press the

Adjustment Program screen

The printer cannot measure the current value of motor correctly, then the heat generation caused by motor drive cannot be estimated accurately either, and which may results in trouble such as incorrect control of motors when allotting a cool down period according to each heat generation. In the worst case, excessive heat generation may cause smoke or ignition.

“Perform” button to measure the correction value.

2. The correction value is automatically measured and the measurement value is writt en to the EEPROM on

the Main Board.

Remarks ---

3.2.2.2 Scanner Motor Heat Protection

Purpose To measure the manufacturing variations of the DC motors (Scanner Motor), Main Board and Power Supply

Board to determine the correction value used for estimating the current values of the motors.

Risks if the adjustment is not correctly made

Procedure 1. Select from the menu of the Adjustment Program. Check the check box of the replaced parts and press the

Adjustment Program screen

“Perform” button to measure the correction value.

2. Turn off the printer and turn it back on.

3. The correction value is automatically measured and the measurement value is writt en to the EEPROM on

the Main Board.

Remarks ---

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MAC Address Label

Last six digits of MAC address

3.2.2.3 MAC Address Setting



This setting is not necessary when the data in EEPROM on the Main Board can b e read o ut.

 To avoid a conflict of MAC address on a network, make sure to correctly follow the MAC

address setting flowchart given on the following.

 The user should be notified of the change of MAC address because of the following

reasons.

• If the user has set the printer’s MAC address on a router, the repaired printer with a new MAC address cannot be connected to the network.

• The default printer name on a network consi sts of “EPSO N” and th e last si x digit s of th e MAC address. Therefore, the printer name becomes different from the previous one.

 You are required to enter the last six digits of the MAC address (xx:yy:zz) on the

adjustment program. MAC address example: B0:E8:92:xx:yy:zz (“xx, yy, zz” represents a value unique to each printer)

Figure 3-1. MAC Address Label

 Setting procedure

1. After replacing the Main Board Assy*, note down the MAC address written on a label on the Housing Upper.

2. Connect the printer and the PC with the USB cable.

3. Start the adjustment program.

4. Select the “Initial Setting” from the menu. The initial setting screen appears.

5. Enter the last six digits of MAC address into the MAC address entry field, and click the Perform button.

6. Select the network status sheet print menu on the printer’s control panel, and print the sheet. Check the MAC address printed on the sheet to see if it is correct.

Figure 3-2. MAC Address Setting Screen

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[Bubbles] [Foreign material]

Teflon tape

Thickness gauge

3.3 Details of Adjustments

This section provides adjustment procedures for which explanation in details is necessary. See "3.1 Required

Adjustments (p55)" for the adjustments not explained here.

3.3.1 Checking the Platen Gap

This section describes the procedure for checking the platen gap (PG).

 The standard range of the PG is as follows:

• Standard: 1.7

 Check the platen gap before installing the CR Scale.

 Tools



Thickness gauges for PG check: 1.48 mm gauge, 1.76 mm gauge

 Teflon tape: Commercially available product (thickness: 0.08 mm)

3.3.1.1 Preparation

This section describes how and what to prepare for the preparation before starting the PG check.  Modification of the thickness gauges

± 0.14 mm

 The Printhead of this printer has an integral structure of the Printhead Cover and

Printhead nozzle surface. Therefore, if the thickness gauge touches the nozzle surface in the same way as performed in the traditional procedure, the nozzle surface may be damaged. When checking the platen gap, make sure to apply Teflon tape (thickness : 0.08 mm) on all the thickness gauges used for checking the Platen Gap in advance.

 Use commercially available Teflon tape of 0.08 mm in thickness.  When applying Teflon tape on the thickness gauges, make sure no bubbles or foreign

material remain under the tape.

Application procedure of Teflon tape.



1. Clean the surfaces of the thickness gauge by using alcohol, and make sure no dirt or contamination remains on the surfaces.

2. Apply Teflon tape on the thickness gauge as shown below.

Figure 3-1. Modification of Thickness Gauge (1)

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Before trimming

After trimming

Thickness gauge Teflon tape

Fold the tape at the edge and trim it at the center in the thickness direction.

3. Fold the excess portions of Teflon tape along the edges of the thickness gauge, and trim the portions at about

the center in the thickness direction of the sides.

Figure 3-2. Modification of Thickness Gauge (2)

When trimming the Teflon tape, the teflon tape can be easily cut out by guiding the half thickness gauge.

 Make sure to wear the heavy gloves to prevent the cutter from cutting the hand when

trimming the Teflon tape.

4. Make sure any tears or burrs on the applied Teflon tape, then the modification of thickness gauges is complete.

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Part(s) to be assembled on the CR Unit: Part(s) NOT to be assembled on the CR Unit

• Empty Adapters • CR Scale

• Adapter Cover

• Tube Guide Sheet*

• Ink Supply Adapter Tube Assy*

Note "*": Not necessarily removed from the printer if the part(s) is/are not assembled on the CR Unit.

80-digit side

Thickness gauges

0-digit side

Thickness gauges

3.3.1.2 Confirmation procedure

When performing the PG adjustment, make sure of the following.

 Make sure the parts assembled on the CR Unit are as follows.

 Move the CR Unit by pulling the top of the CR timing belt.  Be careful not to damage the nozzle surface of the Printhead with the thickness gauge.  When make the Printhead touch the thickness gauge, be careful not to let the Printhead

run onto the gauge.

1. Move the CR Unit in the middle of the printer.

2. Place the 1.48 mm thickness gauges protected with Teflon tape on the points shown below.

Figure 3-3. Position of the Thickness Gauge

3. Move the CR Unit to the right and to the left to make sure that the CR Unit does not touch the gauges. If it touches a gauge, the PG is narrower than the standard. In such a case, reassemble or replace the Printer Mechanism.

4. Move the CR Unit back in the middle of the printer and place the 1.76 mm thickness gauges protected with Teflon tape on the same points as in Step 2.

5. Move the CR Unit to the right and to the left to make sure that the CR Unit touches the gauges. If it does not touch any gauge, the PG is wider than the standard. In such a case, reassemble or replace the Printer Mechanism.

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CHAPTER 4

MAINTENANCE

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Soft dry dust-free cloth Nozzle plate Head cover

Clean it parallel to the nozzle line.

Foreign material

4.1 Cleaning

4.1.1 Cleaning the nozzle plate section of the printhead

 This cleaning should be carried out only if you can see foreign material on the nozzle

plate of the printhead.

 Make sure not to break the nozzle plate with excess force.  Make sure not to deform the head cover.  To prevent mixed colors, make sure to clean it parallel to the nozzle line.  Only wipe off where foreign material attaches, and do not touch the other sections to the

utmost. If foreign material is big, make sure to wipe it off with a clean part of a soft dry dust-free cloth in batches.

 When cleaning the nozzle plate of the printhead, actual ink/pure water/CR02 can be used

to enhance transcription. But, make sure not to use the undesignated liquid (tap water/ CR06) because they may have a negative influence on the printhead filter.

 Tools



Soft dry dust-free cloth

 Liquid (pure water/CR02)

 Cleaning procedure

1. Remove foreign material by moving a soft dry dust-free cloth slowly and lightly.

Note:Actual ink/pure water/CR02 can be used to enhance transcription of foreign material.

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4.1.2 Cleaning the CR Unit

In this product, ink may be attached on the CR Unit by structure of Printhead and CR Unit. So, head short circuit may arise due to ink attachment on the terminal of the head FFC when replacing the printhead.

 This cleaning should be carried out only when replacing the printhead.  When installing the Printhead, make sure the Head FFC is not contaminated with ink

beforehand.

 Tool



Cotton swab or soft dry dust-free cloth

 Cleaning procedure

1. After pulling out the head FFC while holding the printhead from the carriage, confirm the ink attachment on the CR Unit.

2. If ink attached on the CR Unit, wipe it off with a cotton swab (or a soft dry dust-free cloth).

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4.1.3 Cleaning the Exterior Parts/inside of the printer

This section describes how to clean the sections other than the carriage.  Instructions for cleaning

Exterior parts such as housing



Wipe dirt off with a soft clean cloth moistened with water. For glossy or transparent parts, use of unwoven cloth is recommended to avoid scratching those parts.

 Inside of the printer

Remove paper dust with a vacuum cleaner.

 Rubber or plastic rollers such as an Pickup Roller used to feed paper

If paper dust adhered to the rollers decreases the frictional force of the rollers and the rollers cannot properly feed paper, wipe off the paper dust with a soft cloth moistened with diluted alcohol.

 Instructions for cleaning ink stains

Wipe the stains off with a cloth wrung out of diluted alcohol.

 Do not use alcohol for cleaning the transparent parts. Doing so may cause them to get

cloudy.

 When wiping paper dust off the Pickup Roller/Middle Roller, be careful not to rub

against the surface asperity.

 To minimize the effect on the parts, use diluted alcohol such as 70% diluted ether.  After using alcohol for cleaning, make sure to wipe the part off with a soft dry dust-free

cloth to remove alcohol traces fully.

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4.2 Lubrication

The type and amount of the grease used to lubricate the printer parts are determined based on the results of the internal evaluations. Therefore, refer to "4.3 Lubrication Points and Instructions (p70)" for the repairing procedures below, and apply the specified type and amount of the grease to the specified part of the printer mechanism.

"4.3 Lubrication Points and Instructions (p70)" also provides information about whether or not the parts which

require lubrication are supplied as ASP and the lubrication status when supplied as ASP. For the parts which are not supplied as ASP, if their movement is not smooth enough, check their lubrication status and lubricate them if necessary.

 Grease

Type Name EPSON Part Code Supplier

Grease G-45 1033657 EPSON Grease G-71 1480655 EPSON Grease G-72 1409258 EPSON Grease G-96 1590700 EPSON

 Tools

Name Availability EPSON Part Code

Injector O * ---

Brush O * ---

Flux dispenser O * ---

Note "*": Use tools whose specifications are specified in "4.3 Lubrication Points and Instructions (p70)"

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ADF Frame Assy

Application Point

ADF Base Assy

Scanner Housing Lower Assy

Rail

Application Point

Scanner motor pinion gear

1. Application Point

Scanner Carriage Unit

2. Application Point

従動プーリホルダ

Scanner Carriage Unit

Apply in grooves

Application Point

4.3 Lubrication Points and Instructions

<Part supply as ASP> Supplied as the ADF Unit <Lubrication status when

supplied as ASP> Lubricated

<Lubrication Point> Gear support shafts (3

points) on ADF Frame Assy and ADF Base Assy

<Type> G-71

<Application Amount> φ 1 mm x 5 mm x 3 points

<Remarks> Apply with injector and

spread over entire circumference of the shafts.

<Part supply as ASP> Supplied as the Scanner Unit <Lubrication status when

supplied as ASP> Lubricated

<Lubrication Point> Rail on Scanner Housing

Lower Assy <Type>

G-45 <Application Amount>

0.03 g x 3 points <Remarks>

 Apply with injector.  After application, spread

with brush back and forth over entire rail in the order of [1] through [3] following the arrows.

Figure 4-1. Lubrication of the ADF Frame Assy

<Part supply as ASP> Supplied as the Scanner Unit <Lubrication status when

supplied as ASP> Lubricated

1. Gear support shafts (2 points) on Scanner Carriage Unit

2. Scanner motor pinion gear

<Type> G-45

<Application Amount> φ 1 mm x 10 mm x 3 points

1. Apply with injector and spread over entire circumference of the shafts with brush.

2. Apply with injector.

Figure 4-2. Lubrication of the Scanner Housing Lower Assy

<Part supply as ASP> Supplied as the Scanner Unit <Lubrication status when

supplied as ASP> Lubricated

<Lubrication Point> Grooves (4 points) on rail

guide of Scanner Carriage Unit

<Type> G-45

<Application Amount> φ 1 mm x 2 mm x 4 points

<Remarks> Apply with injector.

Figure 4-3. Lubrication of the Scanner Carriage Unit (1)

Maintenance Lubrication Points and Instructions 70

Figure 4-4. Lubrication of the Scanner Carriage Unit (2)

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Scanner Carriage Unit

Inside

Outside Outside

Inside

Application Point

Bevel Gear Shaft 10.4

1. Application Point

2. Application Point

Main Frame

Application Point

0-digit side

80-digit side

CR Unit

Front

0-digit side

Main Frame Assy

CR Unit

80-digit side

EJ ローラ

Front Frame

(1)

Front Rear

Main Frame Assy(3)

(2)

(4)

(5)

Front Rear

Application Point

Rear

<Part supply as ASP> Supplied as the Scanner Unit <Lubrication status when

supplied as ASP> Lubricated

<Lubrication Point> Installation position (7

points) for CIS module of Scanner Carriage Unit

<Type> G-96

<Application Amount> Appropriate amount

 Apply with Flux

Dispenser.

 Stir G-96 before use.

<Part supply as ASP> Supplied as the ADF Unit <Lubrication status when

supplied as ASP> Lubricated

1. Shaft of Bevel Gear Shaft 10.4

2. Contact points with Combination Gear 24,9.6

<Type>

1. G-71

2. G-96

1. φ 1 mm x 10 mm

2. Appropriate amount

1. Apply with injector.

2. Apply with Flux Dispenser. Stir G-96 before use.

<Part supply as ASP> Supplied as the Printer

Mechanism <Lubrication status when

supplied as ASP> Lubricated

<Lubrication Point> Contact points (2 points)

with D/E Lever on Main frame

<Type> G-71

<Application Amount> φ 0.5 mm x 10 mm

<Remarks> Spread over the specified

areas with brush.

Figure 4-6. Lubrication of the Bevel Gear Shaft 10.4 Figure 4-7. Lubrication of the Main Frame

Front Frame

Maintenance Lubrication Points and Instructions 71

Figure 4-5. Lubrication of the Scanner Carriage Unit (3)

Figure 4-8. Lubrication of the Main Frame Assy/Front Frame

<Part supply as ASP> Supplied as the Printer

Mechanism <Lubrication status when

supplied as ASP> Lubricated

<Lubrication Point> Contact points with CR

Unit on Main Frame Assy (4 points) and on Front Frame (1 point)

<Type> G-71

1. 1.15 g x 2 mm

2. 0.42 g x 2 mm

3. 0.63 g x 2 mm

4. 0.76 g x 2 mm

5. 0.40 g x 2 mm <Remarks>

 Apply with injector.  After application, spread

by moving CR Unit to the right and to the left (from 0-digit side to 80digit side)

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Driven Pulley Holder

3. Application Point

Driven Pulley Holder

2. Application Point

Driven Pulley

1. Application Point

Driven Pulley Holder

3. Application Point

EJ Roller Gear

Application Point

EJ Roller

Spur Gear 12

Application Point

Spur Gear 12

PF Roller grounding spring

Paper Guide Front

Application Point

Paper Guide Front

EJ Roller

1. Application Point

2. Application Point

<Part supply as ASP> Supplied as the Printer

Mechanism <Lubrication status when

supplied as ASP> Lubricated

1. Inside of shaft hole on Driven Pulley

2. Bearings (2 points) of Driven Pulley Holder

3. Contact points (6 points) with Main Frame on Driven Pulley Holder

<Type> G-71

<Application Amount> φ 1 mm x 1 mm

 Apply with injector.

1. Never lubricate on areas other than inside of shaft hole on Driven Pulley.

2. After setting Driven Pulley in Driven Pulley Holder, wipe off excess grease.

<Part supply as ASP> Supplied as the Printer

Mechanism <Lubrication status when

supplied as ASP> Lubricated

<Lubrication Point> Shaft of EJ Roller Gear

<Type> G-71

0.08 g <Remarks>

Apply with injector and spread over entire circumference of the shaft.

<Part supply as ASP> Supplied as the Printer

Mechanism <Lubrication status when

supplied as ASP> Lubricated

1. Gear of Spur Gear 12 on PF Roller

2. Contact point with the PF Roller grounding spring

<Type> G-71

1. Appropriate amount (3 mm x 15 mm)

2. Appropriate amount (φ 1 mm x 5 mm)

<Remarks> Apply with injector.

Figure 4-9. Lubrication of the CR Driven Pulley Assy

<Part supply as ASP> Supplied as the Printer

Mechanism <Lubrication status when

supplied as ASP> Lubricated

<Lubrication Point> Contact points (3 points)

with PF Roller on Paper Guide Front

<Type> G-71

<Application Amount> φ 1 mm x 1mm

<Remarks> Apply with injector.

Figure 4-10. Lubrication of the EJ Roller Gear Figure 4-11. Lubrication of the PF Roller

<Part supply as ASP> Supplied as the Printer

Mechanism <Lubrication status when

supplied as ASP> Lubricated

<Lubrication Point> Contact points (8 points)

with EJ Roller on Paper Guide Front

<Type>

1. G-71

2. G-96 <Application Amount>

1. φ 2 mm x 2 mm

2. 0.04 g <Remarks>

1. Apply with injector.

2. Apply with Flux Dispenser. Stir G-96 before use.

Figure 4-12. Lubrication of the Paper Guide Front (1)

Figure 4-13. Lubrication of the Paper Guide Front (2)

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Application Point

Paper Guide Front

Frame Base

Support shaft

Application Point

Frame Base

1. Application Point

2. Application Point

1. Application Point

2. Application Point

3. Application Point

(3) Cross section view of application point

Bottom

Slider Base

Cam slider rail

Paper Stopper Assy

Application Point

<Part supply as ASP> Supplied as the Printer

Mechanism <Lubrication status when

supplied as ASP> Lubricated

<Lubrication Point> Support shaft for

Combination Gear 16.10.4 on Paper Guide Front

<Type> G-71

<Application Amount> Appropriate amount

<Remarks> Apply with injector and

spread over entire circumference of the shaft.

<Part supply as ASP> None <Lubrication status when

supplied as ASP>

--<Lubrication Point>

Support shaft for Cassette Lock Lever of Frame Base

<Type> G-71

<Application Amount> Appropriate amount

<Remarks> Spread over the specified

areas with brush.

<Part supply as ASP> None <Lubrication status when

supplied as ASP>

---

<Lubrication Point> Contact points (12 points)

with Cassette Assy on the rail of Frame Base

<Type> G-96

<Application Amount> Appropriate amount

 Apply with Flux

Dispenser.

 Stir G-96 before use.

Figure 4-14. Lubrication of the Paper Guide Front (3) Figure 4-15. Lubrication of the Frame Base Assy (1)

<Part supply as ASP> None <Lubrication status when

supplied as ASP>

--<Lubrication Point>

Contact points with Cassette Assy on the bottom of Frame Base

1. On sides x 2

2. On backface of ribs x 5

3. On slopes x 2 <Type>

G-96 <Application Amount>

Appropriate amount <Remarks>

 Apply twice with Flux

Dispenser.

 Stir G-96 before use.

Figure 4-16. Lubr i cation of the Frame Base Assy (2)

<Part supply as ASP> None <Lubrication status when

supplied as ASP>

---

<Lubrication Point> Cam slider rail (3 points)

on Slider Base (a component of Paper Stopper Assy)

<Type> G-72

± 0.05 g x 3points

0.1

<Remarks> Apply with injector.

Maintenance Lubrication Points and Instructions 73

Figure 4-17. Lubrication of the Frame Base Assy (3)

Figure 4-18. Lubrication of the Paper Stopper Assy

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Combination Gear 24,9.6

Application Point

Spur Gear 20.4

Application Point

ADF Frame Lower Assy ADF Frame Assy

<Part supply as ASP> Supplied as the ADF Unit <Lubrication status when

supplied as ASP> Lubricated

<Lubrication Point> Combination Gear 24,9.6

(2 points) and Spur Gear

20.4 <Type>

G-96 <Application Amount>

Appropriate amount <Remarks>

 Apply with Flux

Dispenser.

 Stir G-96 before use.

<Part supply as ASP> Supplied as the ADF Unit <Lubrication status when

supplied as ASP> Lubricated

<Lubrication Point> Contact points with ADF

Frame Assy and ADF Frame Lower Assy each other

<Type> G-96

<Application Amount> Appropriate amount

 Apply with Flux

Dispenser.

 Stir G-96 before use.

Figure 4-19. Lubrication of the Combination Gear 24,9.6/Spur Gear 20.4

Figure 4-20. Lubrication of the ADF Frame Assy/ADF Frame Lower Assy

Maintenance ?????? 74

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Epson ET-4550, L655/656 Revision B

Check the check box of the replaced parts.

Perform button

4.4 Shipping Setting

This section describes the shipping setting.

 Regarding Epson ET-4550, L655/656, Scanner CR moves to the 0-digit side after the

initial ink charge compared with being at the 80-digits side in factory default. Scanner CR may fall by shocked in transportation and so on because there is no structure for scanner CR not to fall at the 80-digits side. Therefore, move the scanner CR of all repaired products to 0-digit side.

 Object product All products  Setting procedure

1. Finish repairing, adjustment, printing inspection and so on before it is possible to ship products.

2. Start the adjustment program.

3. Select the “Shipping setting” from the menu. The shipping setting screen appears.

4. Check the checkbox of the “Scanner position set during transportation” and press the “Write” button.

5. Make sure the scanner CR moved to the 0-digit side when the shipping setting was finished.

Maintenance Shipping Setting 75

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CHAPTER 55

APPENDIX

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Epson ET-4550, L655/656 Revision B

5.1 Connector Diagram

Cable connections of this printer are shown below.

Ink End Sensor Assy

Wireless LAN Module

Panel Unit

LCD

Panel FFC

CN4

Ethernet Module

Cassette Sensor

AC in

Fax Unit

Fax Filter Board

Speaker

CN1

PE Sensor

PS Unit

CN1

CN4

CN3

CN2

CN11

Main Board

CN13

CN16

CN501

CN1

Figure 5-1. Connector Diagram

CN5

CN17

CN14

CN10

CN9

CN6

CN72

CN71

CR Unit

PW Sensor

CN2

CR Encoder Board

CN1

Printhead

PF Motor

CR Motor

PF Encoder

ADF/Scanner Unit

CIS Module

ADF PE Sensor

Appendix Connector Diagram 77

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Side view of CR Unit

40 mm

Strong tape

CR Unit

Strong tape

Folded ends

5.2 Protection for Transportation

This section describes the cautions for packing the printer before returning it to the user.

5.2.1 Securing the CR Unit

 Purpose

To prevent damaging the CR Unit by shock during transportation.

 Risk if it is not performed.

Fatal error caused by the damage of the CR Unit.

 Preparation

Strong tape (Length: 170 mm, width: 22 mm, fold on the end: 5 mm)

 Method

1. Turn off the printer and move the CR Unit to the 0-digit side fully.

2. Attach the strong tape on the CR Unit as shown below to secure the CR Unit.

After applying the strong tape, make sure no pieces of strong tape such as the one on the side of the CR Unit are peeled.

Figure 5-2. Securing the CR Unit

Appendix Protection for Transportation 78

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Epson ET-4550, L655/656 Revision B

Stacker Assy Upper

Strong tape

Adjust the edge of the strong tape to this line.

5.2.2 Securing the Stacker Assy

 Purpose

To prevent damaging the Stacker Assy by shock during transportation.

 Risk if it is not performed.

Damage of the Stacker Assy by the shock during transportation.

 Preparation

Strong tape (Length: 400 mm, width: 22 mm, fold on the end: 5 mm)

 Method

Attach the strong tape along a top edge of the stacker Assy as shown below to secure it.

Figure 5-3. Securing the Stacker Assy

Appendix Protection for Transportation 79

Confidential

Epson L655 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Chapter 1 Troubleshooting

Chapter 2 Disassembly/Reassembly

Chapter 3 Adjustment

Chapter 4 Maintenance

Chapter 5 Appendix

TROUBLESHOOTING

1.1 Troubleshooting

1.1.1 Troubleshooting Workflow

1.2 Power-On Sequence

1.3 Fatal Error Code List

DISASSEMBLY/REASSEMBLY

2.1 Overview

2.1.1 Tools

2.1.2 Jigs

2.1.3 Locations of the Parts/Units

2.1.4 Standard Operation Time for servicing the product

2.1.5 Checks and Precautions before Disassembling

2.1.5.1 Factors which Affect the Print Quality

2.1.5.2 Factors which Affect the Safety of Service Personnel such as Ink Leakage during Operation

Main Frame Assy

ADF/Scanner Unit

2.2 Common cautions when disassembling/reassembling the Product

Ink Supply Tank

Housing Upper

Holder Cam Assy

2.3 Disassembly/Reassembly Procedures

2.3.1 Functional differences between models and component parts

2.3.2 Disassembly Flowchart

2.4 Detailed Disassembly/Reassembly Procedure for each Part/Unit

2.5 Routing FFCs/cables

ADJUSTMENT

3.1 Required Adjustments

3.2 Adjustment Program

3.2.1 Operating Environment

3.2.2 Details of the Adjustment Program

3.2.2.1 CR Motor Heat Protection Control / PF Motor Heat Protection Control

3.2.2.2 Scanner Motor Heat Protection

3.2.2.3 MAC Address Setting

3.3 Details of Adjustments

3.3.1 Checking the Platen Gap

3.3.1.1 Preparation

3.3.1.2 Confirmation procedure

MAINTENANCE

4.1 Cleaning

4.1.1 Cleaning the nozzle plate section of the printhead

1. Remove foreign material by moving a soft dry dust-free cloth slowly and lightly.

4.1.2 Cleaning the CR Unit

1. After pulling out the head FFC while holding the printhead from the carriage, confirm the ink attachment on the CR Unit.

2. If ink attached on the CR Unit, wipe it off with a cotton swab (or a soft dry dust-free cloth).

4.1.3 Cleaning the Exterior Parts/inside of the printer

4.2 Lubrication

4.3 Lubrication Points and Instructions

4.4 Shipping Setting

APPENDIX

5.1 Connector Diagram

5.2 Protection for Transportation

5.2.1 Securing the CR Unit

1. Turn off the printer and move the CR Unit to the 0-digit side fully.

2. Attach the strong tape on the CR Unit as shown below to secure the CR Unit.

5.2.2 Securing the Stacker Assy

Main Frame

Assy