Epson L120 Service Manual

SERVICE MANUAL

Color Inkjet Printer

L120

CONFIDENTIAL

SEIJ13-005

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 registered

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, for 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 manual.

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 "2.2 Disassembly/Reassembly

Procedures (p28)".

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Revision Status

Revision Date of Issue Description

A January 24, 2014 First Release

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L120

Revision A

Contents

Chapter 1 Troubleshooting

1.1 Troubleshooting......................................................................................................................................................... 9

1.1.1 Troubleshooting Workflow .............................................................................................................................. 9

1.2 Power-On Sequence ................................................................................................................................................ 11

1.3 Fatal Error Code List ............................................................................................................................................... 13

1.3.1 Printer Fatal Error Code ................................................................................................................................. 13

Chapter 2 Disassembly/Reassembly

2.1 Overview ................................................................................................................................................................. 16

2.1.1 Tools ............................................................................................................................................................... 16

2.1.2 Jigs .................................................................................................................................................................. 16

2.1.2.1 Making the Spring Hook Jig.................................................................................................................. 16

2.1.3 Locations of the Parts/Units ........................................................................................................................... 17

2.1.4 Standard Operation Time for Servicing the Product ...................................................................................... 21

2.1.5 Checks and Precautions before Disassembling .............................................................................................. 23

2.1.5.1 Factors which Affect the Print Quality .................................................................................................. 23

2.1.5.2 Factors which Affect the Safety of Service Personnel such as Ink Leakage during Operation ............ 24

2.2 Disassembly/Reassembly Procedures ..................................................................................................................... 28

2.2.1 Disassembly Flowchart................................................................................................................................... 29

2.2.2 Disassembly Flowchart (Printhead/Main Board) ........................................................................................... 33

2.3 Detailed Disassembly/Reassembly Procedure for each Part/Unit........................................................................... 34

2.4 Routing FFCs/cables ............................................................................................................................................... 40

Chapter 3 Adjustment

3.1 Required Adjustments ............................................................................................................................................. 43

3.2 Adjustment Program................................................................................................................................................ 47

3.2.1 Operating Environment .................................................................................................................................. 47

3.2.2 Details of the Adjustment Program ................................................................................................................ 47

3.2.2.1 CR Motor Heat Protection Control / PF Motor Heat Protection Control .............................................. 47

3.3 Mechanism Adjustment / Check ............................................................................................................................. 48

3.3.1 Checking the Platen Gap ................................................................................................................................ 48

3.3.2 CR/PF Belt Tension Check............................................................................................................................. 50

Chapter 4 Maintenance

4.1 Overview ................................................................................................................................................................. 53

4.1.1 Cleaning .......................................................................................................................................................... 53

4.1.2 Lubrication...................................................................................................................................................... 53

4.2 Lubrication Points and Instructions......................................................................................................................... 54

Chapter 5 Appendix

5.1 Connector Diagram ................................................................................................................................................. 57

5.2 Points to be checked before packing the printer...................................................................................................... 57

5.3 Protection for Transportation .................................................................................................................................. 58

5.3.1 Securing the CR Unit...................................................................................................................................... 58

5.3.2 Securing the Printer Cover ............................................................................................................................. 59

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CHAPTER 1

TROUBLESHOOTING

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1.1 Troubleshooting

This section describes the troubleshooting workflow and fatal error information.

1.1.1 Troubleshooting Workflow

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

Revision A

Troubleshooting Troubleshooting 9

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Start

Turn on the power

Does printer turn on the

power?

Yes

Is Power-on sequence

finished without error?

Yes

Standby condition

Print check pattern

Does an error occur

when printing?

Yes

Is printing operation

finished without trouble?

Yes

Finish

Major problem without

error message

No Power

[Presumable Cause]

• PS Unit damage

• Main Board damage

[Major Troubleshooting]

• PS Unit replacement

• Main Board replacement

[Main board replacement]

• EEPROM data copy for old main board

• EEPROM data initial setting for new Main board

Main board replacement

• EEPROM data copy for old Main Board Assy

• EEPROM data initial setting for new Main Board Assy

Please refer to

List (p13)"

[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

• Printhead damage

• Ink clogging of Printhead

• Contamination on Cap Unit /

• Ink System Assy damage

• Float of Porous Pad on Paper

• Narrower/Wider PG

• PE Sensor Lever damage

• PE Sensor damage

[Major Troubleshooting]

• Driver / Panel re-setting

• CR Scale replacement

• Printhead cover cleaning

• Printhead cleaning

• Ink Cartridge replacement

• Printhead replacement

• Rubber cleaning of Cap Unit

• Ink System Assy replacement

• Porous Pad re-installation

• Printer replacement

• PE Sensor Lever replacement

• PE Sensor replacement

• Ink tank replacement

Fatal error

" 1.3 Fatal Error Code

Major problem without error message

Poor Printing

cover

Wiper of Ink System Assy

Guide Front

(out of standard)

(Main Board replacement)

Poor Paper Loading

[Presumable Cause]

• Use of 3rd party media

• Edge guide mis-setting

• Foreign material

• Part come-off

• Contamination of LD Roller or PF roller

[Major Troubleshooting]

• Recommendation of EPSON media

• Edge guide re-setting

• Foreign material removal

• Part re-installation

• Roller replacement

[Presumable Cause]

• Foreign material

• Insufficient grease

•Gear damage

[Major Troubleshooting]

• Foreign material removal

• Lubrication of grease

• Gear replacement

[Phenomenon]

Blank printing

[Presumable Cause]

• Ink tube crumples

• Ink tube connection is incomplete.

[Major Troubleshooting]

• Ink tank replacement

• Ink tube re-installation

Incomplete Initial Ink Charge

[Occurrence Condition]

Ink LED is ON and STM indicates "Initial ink charging is not complete".

[Major Occurrence Timing]

Print start timing.

[Troubleshooting]

Perform initial ink charge

Abnormal Noise

Blank printing

[Occurrence Condition]

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

[Major Occurrence Timing]

• Power-on timing

• Print start timing

• Cleaning timing

[Troubleshooting]

• Porous Pad replacement & Maintenance counter reset

[Occurrence Condition]

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

[Major Occurrence Timing]

• Power-on timing

• Paper loading timing

• Paper eject timing

[Major Troubleshooting]

1 Perform paper eject operation

from operation panel.

• Success

•Fail

2 If fail in the above 1, remove

the paper by opening Printer Cover.

3 Perform paper eject operation

from operation panel again.

• Success

•Fail

4 If fail in the above 3, check

foreign material / part comeoff / PE Sensor Lever / PE Sensor / Main board.

Major problem with error message

Maintenance error

Paper Jam error

Starts paper feeding operation again if printer has print data.

Occurs paper jam error again.

Starts paper feeding operation again if printer has print data.

Occurs paper jam error again.

Ink End error

[Occurrence Condition]

This error occurs when ink counter reaches ink end level.

[Major Occurrence Timing]

• Power-on timing

• Print start timing

• Cleaning timing

[Troubleshooting]

• Refill ink and reset ink counter by panel.

No Paper error

[Occurrence Condition]

This error occurs when top of paper can not be detected correctly by PE Sensor in the specified steps up to completion of the paper loading operation. (No paper / No loading / large paper skew)

[Major Occurrence Timing]

• Paper loading timing

[Major Troubleshooting]

1 Set paper in ASF and perform

paper feed operation.

2 If the paper stops before

reaching PE Sensor, remove it and check the paper condition.

3 A) If paper is OK, set paper in

ASF and move edge guides to appropriate position, and perform 2 again.

B) If damage in the above 2,

check foreign materials / parts come-off / parts transformation in paper path.

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

check foreign material / Part come-off / surface condition of LD Roller or PF Roller / PE Sensor Lever / PE Sensor / Main Board / PF Motor.

Paper Jam Fatal error

[Occurrence Condition]

This error occurs when CR Unit is blocked by jammed paper.

[Major Occurrence Timing]

• Power-on timing

[Major Troubleshooting]

• Remove jammed paper

[NOTE]

On this product, if CR Unit touches jammed paper, CR Unit moves back in the opposite direction so that customer can remove the paper. However, if CR Unit cannot move in this sequence, this error occurs.

Double Feed error

[Occurrence Condition]

When manual duplex printing is selected using the printer driver, this error occurs if the actual paper length detected by PE Sensor does not match with the paper length specified in the printer driver. (The error occurs when the actual length is longer than the theoretical length specified in the driver.)

[Major Occurrence Timing]

• Paper loading timing

• Paper eject timing

[Troubleshooting]

• PE Sensor Lever replacement

• PE Sensor replacement (Main Board replacement)

• Main Board replacement

[NOTE]

This error may occur in the manual duplex printing if the inverted sheet printed on the first side sticks to the second sheet when the first side printing is complete and the sheet is inverted and set to ASF to print on the other side.

Paper Size Unmatch error

[Occurrence Condition]

This error occurs if the actual paper length detected by PE Sensor does not match with the paper length specified in the printer driver. (The error occurs no matter when the actual length is longer or shorter than the theoretical length specified in the driver.)

[Major Occurrence Timing]

• Paper eject timing

[Troubleshooting]

• PE Sensor Lever replacement

• PE Sensor replacement (Main Board replacement)

• Main Board replacement

*1: If the Hopper of ASF on the returned product touches the LD Roller, the initial ink charge has

not been completed for the product yet.

*2: 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.

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

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

claims recurs, then proceed to the troubleshooting.

 This flowchart is compiled based on the following contents.

• Our experience regarding the quality problem.

• ESK’s repair data.

• Printer Mechanism specification for the product.

Troubleshooting Troubleshooting Workflow 10

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1.2 Power-On Sequence

This section describes the power-on sequences in two conditions. The preconditions are as follows.

 Condition 1: Normal power-on sequence (See Table 1-1.)



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

 Initial ink charge has finished and every cartridge has sufficient ink.  No paper on the paper path.  The Printhead is capped with the Cap Assy.  The CR Unit is normally fixed by the Change Lever.  Maintenance error recovery has never been performed.

Table 1-1. Condition 1: Normal Power-on Sequence

Operation

1. Printhead initialization and fuse inspection

1-1.Initializes the Printhead, and checks for the fuse on the circuit boards in the printer.

2. Checking for waste ink overflow

2-1.Checks the waste ink counter if the waste ink overflow is occurring.

3. Seeking the home position

3-1.The CR Unit moves to the 80-digit side slowly and confirms it touches the Change Lever (CR lock).

Revision A

CR Unit/PF Roller

movement and

position

3-2.The CR Unit moves to the 0-digit side slowly.

3-3.After the PE Sensor checks if paper exists, the PF Motor rotates clockwise for one second and releases the CR lock.

3-4.While checking if the CR Unit does not touch the Change Lever (CR lock) or the foreign material, the CR Unit

moves to the 80-digit side slowly until it touches the Left Frame.

3-5.The distance from the position where the CR Unit touched to the Left Frame is regarded as the standard distance

from the origin position, and the home position is fixed. From then on, the CR Unit position is monitored according to the signals from the CR Encoder.

3-6.The CR Unit moves to near its home position quickly.

4. PF Motor Measurement

4-1.The PF Motor rotates clockwise until the PF Roller turns five times to perform a load measurement.

5. Detecting ink cartridge and initializing ink system

5-1.The CR Unit returns to its home position.

6. Low temperature operation sequence

6-1.The CR Unit quickly moves back and forth between near the Change Lever and near the Left Frame for two times.

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: The fatal error occurs if there is a problem such as the fuse blew. *4: The empty suction operation may occur depending on the situation. *5: Executed when the detected temperature is under 5

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

Troubleshooting Power-On Sequence 11

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 Condition 2: Power-on sequence after recovering from a paper jam error (See Table 1-2.)



Turning on the printer after turning it off with a paper jam fatal error.

 There still remains paper on the paper path out of the detecting area of the PE Sensor.  Maintenance error recovery has never been performed.

Revision A

Table 1-2. Condition 2: Power-on Sequence after Recovering from a Paper Jam Error

Operation

Executes No.1 to No.3 on the normal power-on sequence (Table 1-1).

4. Detecting remaining paper

4-1.5.The CR Unit returns to its home position.

4-2.The CR Unit moves to the 80-digit side and confirms there is no paper.

4-3.The CR Unit quickly returns to its home position, and displays on the LCD that the paper jam error has occurred.

When the user removes the paper and releases the paper jam error by panel operation, the normal power-on sequence from No.1 (Table 1-1) is executed

again.

Note *1: “Paper exists” is detected when the CR Unit touches the paper. When “paper does not exist” is detected, the power-on sequence

of condition 1 (Table 1-1) is executed from No.4.

*2: If the paper jam error cannot be solved after repeating the power-on sequence on condition 2 (

into the paper jam fatal error for the third time.

CR Unit/PF Roller

movement and

position

Table 1-2) twice, the printer turns

 To recover from the maintenance error, the dedicated software that can be downloaded

from the web site which can be accessed from STM3 is required.

 The printer operation related to the maintenance error recovery is as follows.

• When the waste ink counter reaches the threshold value (1) for the first time and the maintenance error occurs, the counter threshold of the maintenance error is changed to threshold value 2 after performing recovery from the maintenance error.

• After the threshold value (2) is enabled, the warning; to notify the possibility of ink leakage out of the printer, is displayed every time the waste ink counter increases by 1%.

• If the waste ink counter reaches the threshold value (2), the maintenance error occurs. Then, the waste ink counter is changed back to the threshold value (1) after recovering from the maintenance error, and the warning is displayed repeatedly according to the increment of the waste ink counter until the maintenance error occurs when the threshold value (2) is reached. (Recovery from the maintenance error can be performed up to the specified number of times.)

Troubleshooting Power-On Sequence 12

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1.3 Fatal Error Code List

This section describes how to check the fatal error code, description, and the possible causes.

1.3.1 Printer Fatal Error Code

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

Table 1-3. Fatal Error List (Printer)

Revision A

Error type

DC motor error

Error

code

01H CR PID excess load error

02H CR PID excess speed error

03H CR PID reverse error

04H CR PID lock error

08H CR load position reverse error

09H CR load position excess speed error

0AH CR load position excess load error

F1H PF PID excess load error

F2H PF PID excess speed error

Error name Possible cause

• CR Motor failure

• CR Unit drive mechanism overload (paper jam, foreign object, insufficient grease, deformation of the Main Frame)

• Some part may be detached. (Paper Guide Upper Assy, Cap Assy)

• Tooth skip of the CR Timing Belt

• Improper tension of the CR Timing Belt

• Cable disconnection

• Main Board failure (Motor driver failure)

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

• Main Board failure (Motor driver failure)

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

• Some external force is applied to the printer such as stopping the CR Unit during printer operation, vibration or the like.

• Tooth skip of the CR Timing Belt

• Paper jam

• Main Board failure (Motor driver failure)

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

• CR Motor failure

• CR Unit drive mechanism overload (paper jam, foreign object, insufficient grease, deformation of the Main Frame)

• Some part may be detached. (Paper Guide Upper Assy, Cap Assy)

• Cable disconnection

• Main Board failure (Motor driver failure)

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

• Main Board failure (Motor driver failure)

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

• Tooth skip of the CR Timing Belt

• Improper tension of the CR Timing Belt

• Paper jam

• Main Board failure (Motor driver failure)

• CR Motor failure

• CR Unit drive mechanism overload (paper jam, foreign object, Change Lever failure)

• Cable disconnection

• Main Board failure (Motor driver failure)

• PF Motor failure

• PF drive mechanism overload (paper jam, foreign object, insufficient grease, deformation of the Main Frame)

• Tooth skip of the PF Timing Belt

• Improper tension of the PF Timing Belt

• Cable disconnection

• Main Board failure (Motor driver failure)

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

• Tooth skip of the PF Timing Belt

• Improper tension of the PF Timing Belt

• Main Board failure (Motor driver failure)

Troubleshooting Fatal Error Code List 13

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Revision A

Table 1-3. Fatal Error List (Printer)

Error type

DC motor error

Motor drive time error

Printhead system error

Sequence error

Circuit error 80H Circuit error (include blowout of a fuse) • Main Board failure

Error

code

F3H PF PID reverse error

F4H PF PID lock error

F8H PF load position reverse error

F9H PF load position excess speed error

FAH PF load position excess load error

D1H CR (PID) driving time error • Main Board failure (Firmware failure)

D2H CR (load position) driving time error

D3H PF (PID) driving time error • Main Board failure (Firmware failure)

D4H PF (BS) driving time error

40H Transistor temperature error • Main Board failure

41H X-Hot detect error (pre printing)

42H X-Hot detect error (after flushing)

43H Head temperature error

50H Home position error

56H

5BH Insoluble paper jam error

Contact error at ink replacement timing (Power-off)

Error name Possible cause

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

• Tooth skip of the PF Timing Belt

• Improper tension of the PF Timing Belt

• Paper jam

• Paper is pulled out from the ASF side when paper is fed

• Main Board failure (Motor driver failure)

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

• PF Motor failure

• PF drive mechanism overload (paper jam, foreign object, insufficient grease, deformation of the Main Frame)

• Cable disconnection

• Main Board failure (Motor driver failure)

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

• Tooth skip of the PF Timing Belt

• Improper tension of the PF Timing Belt

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

• Tooth skip of the PF Timing Belt

• Improper tension of the PF Timing Belt

• Main Board failure (Motor driver failure)

• PF Motor failure

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

• Tooth skip of the PF Timing Belt

• Improper tension of the PF Timing Belt

• Cable disconnection

• Change Lever failure

• CR Motor failure

• Main Board failure (Motor driver failure)

• Change Lever failure

• CR Motor failure

• Main Board failure (Motor driver failure)

• Printhead failure

• Main Board failure

• Foreign object

• Deformation of the Main Frame

• Change Lever failure

• Paper jam

• Foreign object

• Ink Cartridges are not installed correctly

• Paper jam

• Foreign object

• Deformation of the Main Frame

• Change Lever failure

• Paper jam

Troubleshooting Fatal Error Code List 14

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CHAPTER 2

DISASSEMBLY/REASSEMBLY

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Before folding

Fold here

Clip

40 mm or more

After folding

Fold appropriate length

to hitch a spring.

Clip

2.1 Overview

This chapter describes procedures for disassembling the main parts/units of this product. Unless otherwise specified, disassembled parts/units can be reassembled by reversing the disassembly procedure. See the cautions or tips for disassembly/reassembly described in "2.3 Detailed Disassembly/Reassembly Procedure for each Part/

Unit (p34)".

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 ---

Acetate tape --- 1003963

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

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

Revision A

2.1.2 Jigs

Name Quantity EPSON Part Code

Spring hook jig* 1 Can be made with a commercial item See " Making the Spring Hook Jig (p16)".

Thickness gauge (1.5 mm) 2 Commercially available

Thickness gauge (2.0 mm) 2 Commercially available

Sonic tension meter 1 1294120

Note *: If performing the disassembling/reassembling procedure is difficult using tweezers such as when reassembling " Cap Lever/Cap

Assy (p35)", the spring hook jig helps you to remove/attach the spring easier.

2.1.2.1 Making the Spring Hook Jig

Fold a clip (commercial item) as shown in Fig. 2-1.

Figure 2-1. Making the Spring Hook Jig

Disassembly/Reassembly Overview 16

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Front

Right

3 4

Rear

Left

2.1.3 Locations of the Parts/Units

This section shows the locations of the main parts/units of this product.

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

 Exterior parts

Revision A

No. Name No. Name

1 Housing Upper (p31) 5 Buttons (p31)

2 Printer Cover (p29) 6 Paper Support Assy (p29)

3 Cap Tank (p29) 7 Paper Support Joint (p29)

4 Ink Supply Tank Upper Housing (p29) 8 Frame Base Assy (p30)

Figure 2-2. Exterior Parts

Disassembly/Reassembly Overview 17

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L120

8 11

 Printer mechanism

No. Name No. Name

1 CR Driven Pulley Assy (p30) 6 Adapter (p31)

2 CR Scale (p30) 7 CR Unit (p32)

Revision A

3 CR Timing Belt (p32) 8 PF Roller Unit (p32)

4 Printhead (p31) 9 Star Wheel Holder Assy (p31)

5 CR Encoder Sensor (p32) 10 Paper Guide Upper Assy (p32)

11 Joint (p31)

Figure 2-3. Printer Mechanism: Front

No. Name No. Name

1 LD Roller Assy (p30) 6 Pump Unit (p32)

2 LD Roller Cover (p30) 7 Cap Assy (p29)

3 Hopper (p30) 8 Porous Pad for Cap Assy (p29)

4 Retard Roller Assy (p29) 9 Cap Lever (p29)

5 Paper Back Lever (p29)

Figure 2-4. Printer Mechanism: Right

Disassembly/Reassembly Overview 18

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