Epson Perfection 4490 photo Service Manual
  1. Manuals
  2. Brands
  3. Epson Manuals
  4. Scanner
  5. Perfection 4490 Photo
  6. Service manual

Epson Perfection 4490 photo Service Manual

Color image scanner photo automatic document feeder
Hide thumbs Also See for Perfection 4490 photo:
Table of Contents

Advertisement

Quick Links

See also: User Manual , Product Information Manual
Service Manual
Color Image Scanner
EPSON Perfection 4490 Photo
Automatic Document Feeder
SESC05004

Advertisement

Table of Contents
loading

Related Manuals for Epson Perfection 4490 photo

Summary of Contents for Epson Perfection 4490 photo

  • Page 1 Service Manual Color Image Scanner EPSON Perfection 4490 Photo Automatic Document Feeder SESC05004...
  • Page 2 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.
  • Page 3 REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.

  • Page 4: About This Manual

    Provides Epson-approved methods for adjustment. destruction of, equipment. CHAPTER 6.MAINTENANCE Provides preventive maintenance procedures and the lists of Epson- May indicate an operating or maintenance procedure, practice or approved lubricants and adhesives required for servicing the product. C H E C K condition that is necessary to accomplish a task efficiently.
  • Page 5 Revision Status Revision Date of Issue Description May 31, 2005 First release CHAPTER 4 DISASSEMBLY AND ASSEMBLY • 4.2.15 Removing Torsion Spring (p49) A caution is added. CHAPTER 7 APPENDIX August 31, 2005 • 7.3 Exploded diagram (p73) is updated. •...

  • Page 6: Table Of Contents

    EPSON Perfection 4490 Photo Revision B Contents Chapter 1 PRODUCT DESCRIPTION Chapter 4 Disassembly / Assembly 1.1 Features........................9 4.1 Overview ......................30 4.1.1 Precautions....................30 1.2 Specifications ...................... 10 4.1.2 Recommended Tools .................. 30 1.3 Detailed Specifications..................12 4.1.3 Recommended Screws................30 1.4 Interface.......................
  • Page 7 EPSON Perfection 4490 Photo Revision B Chapter 5 ADJUSTMENT 5.1 Overview ......................58 5.1.1 Adjustment item..................58 5.1.2 Adjustment method..................58 5.1.3 Adjustment of Torsion Springs on the TPU CR Drive Belt ....... 58 Chapter 6 Maintenance 6.1 Overview ......................60 6.1.1 Cleaning ......................
  • Page 8 C H A P T E R PRODUCT DESCRIPTION...

  • Page 9: Features

    1.1 Features Multiple exposure levels from Natural to Vivid are preset for Auto • Exposure The main features of the EPSON Perfection 4490 Photo are as follows. Digital ICE for Film Dust and scratch removal with hardware High Quality Built-in 2.7" x 9.3" transparency unit (TPU)

  • Page 10: Specifications

    13.5 W • Sleep mode: 3.8 W Note *: The maximum hardware resolution of 4800 x 9600 dpi is achieved using EPSON's • Micro Step Drive technology. The motor basic step is 2400 dpi. Rated current 1.1 A Output Resolution...
  • Page 11 EPSON Perfection 4490 Photo Revision B Rated output current 1.1 A EMC AND SAFETY STANDARDS COMPLIANCE Current resistance 500 VDC: > 100 MΩ (AC input terminal and DC output terminal) Scanner 100 V • FCC15B Class B (USA) • CSA108.8 Class B (Canada) (FCC represents) Voltage resistance 3000 VAC for 1 min.

  • Page 12: Detailed Specifications

    EPSON Perfection 4490 Photo Revision B 1.3 Detailed Specifications 1.4 Interface The interfaces of this scanner are shown below. IMAGE PROCESSING FUNCTION Gamma Correction 1 User defined level Color Correction 1 User defined level AC Input Line Art Fixed threshold...

  • Page 13: Exterior Specifications

    EPSON Perfection 4490 Photo Revision B 1.5 Exterior Specifications 1.5.1 Explanation of Switches Copy Button Scan to PDF Button Status LED Start Button Starts the EPSON Smart Panel. Copy Button Prints photos and makes prints from films. Scan to E-mail Button Sends the scanned image by an e-mail.

  • Page 14: Dimensions

    Dimensions and Weight Dimensions 272 x 475 x 113mm (W x D x H) Weight Approx. 4.0 kg (without AC adaptor) 4.113 kg (with AC adaptor) Unit: mm Figure 1-3. External Dimensions of Perfection 4490 Photo PRODUCT DESCRIPTION Exterior Specifications...

  • Page 15: Maximum Document Size And Placement

    EPSON Perfection 4490 Photo Revision B 1.5.4 Maximum Document Size and Placement TRANSPARENT DOCUMENT REFLECTIVE DOCUMENT Size : 2.72 in (68 mm) W x 9.44 in (236 mm) H Size : 8.5 in (216 mm) W x 11.7 in (297 mm) H 67.56 ±...

  • Page 16: Control Codes

    EPSON Perfection 4490 Photo Revision B 1.6 Control Codes Category Command Name Code Control Normal response The following table is the list of control codes by the scanner. Abnormal response NACK Scanning stop Category Command Name Code Header Execution command...

  • Page 17: Error-Time Processing

    EPSON Perfection 4490 Photo Revision B 1.7 Error-Time Processing Table 1-1. Error Definition and Remedy List Category LED Indication Cause Scanner response Recovery Command error None An invalid command or invalid command • The scanner (interpreter) ignores the The error condition is cleared when the scanner parameter was detected.
  • Page 18 C H A P T E R OPERATING PRINCIPLES...

  • Page 19: Engine Operation Outline

    EPSON Perfection 4490 Photo Revision B 2.1 Engine Operation Outline CCD Sensor Board Forms an alternative six-lines color CCD (R, G, B independent) and its control and drive circuits. This section explains the functions and operating principles of the Perfection 4490...

  • Page 20: Tpu Carriage Unit Outline

    EPSON Perfection 4490 Photo Revision B 2.1.2 TPU Carriage Unit Outline The TPU Carriage Unit consists of TPU Inverter Board, Lamps (light source), SUB_C Board, and SUB_D Board. (Refer to Fugure 2-3.) Front Lamps SUB_C Board Rear TPU Inverter Board SUB_D Board Figure 2-3.

  • Page 21: Carriage Moving Mechanism Operation

    EPSON Perfection 4490 Photo Revision B 2.1.3 Carriage Moving Mechanism Operation The Carriage Unit slides along the guide rail in the sub scanning direction. To perform this sliding operation, the CR (Carriage) Motor transmits its drive power to the Timing The image data of a document are scanned in the combination of the main scanning Belt, which is fixed to the Carriage Unit, via the Drive Pulley and Deceleration Gear.

  • Page 22: Tpu Carriage Drive Mechanism Operation

    EPSON Perfection 4490 Photo Revision B 2.1.4 TPU Carriage Drive Mechanism Operation The TPU Carriage Unit slides along the guide shaft in the secondary scanning direction as the TPU CR (Carriage) Motor transmits its drive power to the TPU CR Drive Belt connected to the TPU Carriage Unit, via the Idle Pulley and Drive Pulley.

  • Page 23: Digital Ice Function Operation

    EPSON Perfection 4490 Photo Revision B 2.2 Digital ICE Function Operation Digital ICE for Film Process Sequence Read the visible light position. Two holes in the upper housing are scanned with This scanner features Digital ICE for Film, an image correction process that uses a visible light in order to register the home position of image being scanned.

  • Page 24: Operation Principle Of Electric Circuit

    EPSON Perfection 4490 Photo Revision B 2.3 Operation Principle of Electric Circuit Power supply The scanner is powered with 24 VDC voltage from the AC adapter. The following electric circuits are used in the scanner. AC adapter rated voltage Main Board Rated output DC24 1.1A...
  • Page 25 C H A P T E R TROUBLESHOOTING...

  • Page 26: Overview

    EPSON Perfection 4490 Photo Revision B 3.1 Overview OPTION ERROR (Only when the Option Unit is fitted and the scanner is ready to operate under the This chapter explains the remedies for errors detected by the scanner’s self-diagnostic control command (ESC e)) function, and provides a troubleshooting guide based on observed ploblems.

  • Page 27: Troubleshooting

    EPSON Perfection 4490 Photo Revision B 3.2 Troubleshooting Table 3-5. Scanned Image Quality Error. Step Possible Cause Corrective Action This section provides troubleshooting procedures based on observed faults. The Document Glass is not clean. (Image Clean the glass. has white spots) 6.1.1 Cleaning...
  • Page 28 EPSON Perfection 4490 Photo Revision B Table 3-8. The Carriage Unit does not operate. Table 3-11. The TPU Carriage Unit does not operate. Step Possible Cause Corrective Action Step Possible Cause Corrective Action The Carriage Lock has not been released.
  • Page 29 C H A P T E R DISASSEMBLY / ASSEMBLY...

  • Page 30: Overview

    WARNING and CAUTION. 4.1.3 Recommended Screws Before disassembling or reassembling this product, always The following table indicates the screws used in the EPSON Perfection 4490 Photo W A R N I N G disconnect the Power Cable and Interface Cable. When you Scanner.

  • Page 31: Disassembly Procedure

    EPSON Perfection 4490 Photo Revision B 4.2 Disassembly Procedure This section illustrates how to remove the main components of this product. Unless otherwise specified, the reassembly procedure is the reverse of the disassembly procedure. For additional assembly illustrations, refer to the exploded diagrams in the Appendix.

  • Page 32: Removing The Tpu Unit

    EPSON Perfection 4490 Photo Revision B 4.2.1 Removing the TPU Unit Open the TPU Unit. Hold both ends of the TPU Unit and then lift and remove it. Disconnect the TPU Unit cable from the Main Unit. Main TPU Unit TPU Unit Cable Figure 4-2.

  • Page 33: Removing The Upper Housing

    EPSON Perfection 4490 Photo Revision B 4.2.2 Removing the Upper Housing Remove the TPU Unit. See Section 4.2.1 on page 32. Remove the four C.B.P. M3 x 8 screws that secure the Upper Housing to remove Upper Housing C.B.P. 3 x 8 (7±1 kgf.cm)

  • Page 34: Removing The Carriage Unit

    EPSON Perfection 4490 Photo Revision B 4.2.3 Removing the Carriage Unit Disconnect the Carriage FFC from the Main Board. See Section 4.2.5 Step 5 - Step 7 Remove the two-sided tape that secure the Carriage FFC to the Upper Housing.
  • Page 35 EPSON Perfection 4490 Photo Revision B Move the A part on the Driven Pulley Holder Assy. in the direction of the arrow 10. Push up the B part of the Lock Plate attached on the rear of the Carriage Unit to and remove the CR Tension Belt from the Driven Pulley.

  • Page 36: Removing The Panel Board

    EPSON Perfection 4490 Photo Revision B 4.2.4 Removing the Panel Board When reinstalling the Panel Board, pay attention to the followings. Put the ground terminal into the front bushing of the Lower Remove the Carriage Unit. See Section 4.2.3 on page 34.

  • Page 37: Removing The Main Board

    EPSON Perfection 4490 Photo Revision B 4.2.5 Removing the Main Board Remove the Main Board Cover in the following procedure. Remove the C.B.P. M3 x 8 screw and C.B.P. M3 x 12 screws that secure the Release the Carriage Lock.
  • Page 38 EPSON Perfection 4490 Photo Revision B Release the tab of the Main Board Cover with a flat-blade screwdriver and lift When reinstalling the Main Board Cover, match the two tabs and one side (tab side) of the Main Board Cover.
  • Page 39 EPSON Perfection 4490 Photo Revision B Remove the four C.B.P. M3 x 8 screws that secure the Main Board. Disconnect the all connectors on the Main Board and remove the Main Board. CN1: Carriage FFC CN2: CR Motor Cable CN3: Power Switch Connector CN6: Panel FFC C.B.P.

  • Page 40: Removing The Power Switch

    EPSON Perfection 4490 Photo Revision B 4.2.6 Removing the Power Switch Push the Power Switch toward the outside while releasing the two tabs, and remove the Power Switch by pushing it out through the hole on the Lower Move the Carriage Unit to the front of the main unit.

  • Page 41: Removing The Panel Ffc

    EPSON Perfection 4490 Photo Revision B 4.2.7 Removing the Panel FFC When installing the Panel FFC, attach the Ferrite Core as shown in the figure below. Move the Carriage Unit to the front of the main unit. See Section 4.2.3 Step 1 - Step 3 Disconnect the Panel FFC from the Main Board.

  • Page 42: Chapter 2 Operating Principles Holder Assy

    EPSON Perfection 4490 Photo Revision B 4.2.8 Removing the Driven Pulley, Driven Pulley Spring, Remove the Driven Pulley Spring from the Driven Pulley Holder Assy. and the Driven Pulley Holder Assy. Remove the washer and remove the Driven Pulley from the shaft of the Driven Pulley Holder Assy.

  • Page 43: Removing The Cr Motor Unit, Motor Tension Belt, And The Cr Tension Belt

    EPSON Perfection 4490 Photo Revision B 4.2.9 Removing the CR Motor Unit, Motor Tension Belt, Install the ground plate in the following procedure. and the CR Tension Belt Match the positioning hole of the ground plate with the guide pin of the Lower Housing.
  • Page 44 EPSON Perfection 4490 Photo Revision B Remove the torsion spring and the C.B. M3 x 3 screw that secure the Tensioner, and remove the Pulley. When installing the Tensioner, make sure to perform the Tensioner A D J U S T M E N T R E Q U I R E D Adjustment.

  • Page 45: Removing Tpu Lower Housing

    EPSON Perfection 4490 Photo Revision B 4.2.10 Removing TPU Lower Housing Remove the six C.B.P. M3 x 12 screws and the two C.B.P. M3 x 8 screws that secure the TPU Lower Housing. Remove the TPU Unit. See Section 4.2.1 on page 32.

  • Page 46: Removing The Sensor Board

    EPSON Perfection 4490 Photo Revision B 4.2.11 Removing the Sensor Board 4.2.12 Removing the Hinge Assy. Remove the TPU Lower Housing. See Section 4.2.10 on page 45. Remove the TPU Lower Housing. See Section 4.2.10 on page 45. Remove the C.B.P. M3 x 8 screw that secures the Sensor Board.

  • Page 47: Removing The Tpu Unit Cable

    EPSON Perfection 4490 Photo Revision B 4.2.13 Removing the TPU Unit Cable When installing the TPU Unit Cable, put the cable and the Remove the TPU Lower Housing. See Section 4.2.10 on page 45. cable tie into the notches as shown in Figure 4-31.

  • Page 48: Removing The Drv Board

    EPSON Perfection 4490 Photo Revision B 4.2.14 Removing the DRV Board Remove the TPU Lower Housing. See Section 4.2.10 on page 45. Remove the two C.B.P. M3 x 8 screws that secure the DRV Board Cover and remove the ground to remove the DRV Board Cover.

  • Page 49: Removing Torsion Spring

    EPSON Perfection 4490 Photo Revision B 4.2.15 Removing Torsion Spring To adjust the tension of the TPU CR Drive Belt, attach the three A D J U S T M E N T R E Q U I R E D torsion springs in the following procedure.

  • Page 50: Removing The Tpu Carriage Unit

    EPSON Perfection 4490 Photo Revision B 4.2.16 Removing the TPU Carriage Unit Remove the CN3 Connector from the DRV Board, and remove the two-sided tape to remove the TPU Carriage Unit. When performing the procedure given below, be careful not to lose...

  • Page 51: Removing The Tpu Inverter Board

    EPSON Perfection 4490 Photo Revision B 4.2.17 Removing the TPU Inverter Board Release Connector Cables from the tabs of the Carriage Frame shown in the figure below. Remove the TPU Carriage Unit. See Section 4.2.16 on page 50. Disconnect the all connectors (CN2, CN3, CN4) from the TPU Inverter Board.
  • Page 52 EPSON Perfection 4490 Photo Revision B Remove the Protective Cover from the TPU Inverter Board. When installing the TPU Inverter Board to the TPU Carriage Frame, match the positioning holes and the guide pins as shown Protective Cover in the figure below.

  • Page 53: Chapter 3 Troubleshooting 4.2.18 Removing The Sub_C Board, Sub_D Board, And The Lamp

    EPSON Perfection 4490 Photo Revision B 4.2.18 Removing the SUB_C Board, SUB_D Board, and Remove the two C.B.P. M3 x 6 screws that secure the TPU Lamp Cover to remove the Lamp Remove the TPU Carriage Unit. See Section 4.2.16 on page 50.
  • Page 54 EPSON Perfection 4490 Photo Revision B Remove the Lamp from the two tabs on each end of the TPU Carriage Unit. When installing the SUB_C Board and SUB_D Board, match the notches and tabs as shown in Figure 4-42. Lamp When installing the TPU Lamp Cover, match the positioning holes and the guide pins as shown in the figure below.

  • Page 55: Removing The Tpu Cr Motor

    EPSON Perfection 4490 Photo Revision B 4.2.19 Removing the TPU CR Motor Remove the three C.P.F.P. M3 x 8 screws that secure the TPU CR Motor Unit and remove it. When performing the procedure given below, be careful not to lose...
  • Page 56 EPSON Perfection 4490 Photo Revision B Remove the three TPU CR Motor Dampers. Remove the flat washer and remove the Driven Pulley, TRU CR Drive Belt, and Route the TPU CR Motor Cables through the groove and the Idle Pulley in that order.
  • Page 57 C H A P T E R ADJUSTMENT...

  • Page 58: Chapter 5 Adjustment

    EPSON Perfection 4490 Photo Revision B 5.1 Overview 5.1.2 Adjustment method 5.1.2.1 Motor Tension Belt tension adjustment This section explains the adjustment required when this product is disassembled. Press the Pulley against the Motor Tension Belt, and temporarily fit the Tensioner.

  • Page 59: Chapter 6 Maintenance

    C H A P T E R MAINTENANCE...

  • Page 60: Overview

    EPSON Perfection 4490 Photo Revision B 6.1 Overview 6.1.2 Lubrication Lubrication is required when any part of the Carriage Unit of the scanner has been This chapter explains the maintenance work necessary to keep this product in the best replaced or the Carriage moves with noticeably large operation noise. The specified condition and to prevent problems.
  • Page 61 EPSON Perfection 4490 Photo Revision B [Lubrication Point] [Lubrication Point] Applying Point Pulley shaft of the CR Motor Concave portion of the Carriage Unit Lock [Lubrication Type] G-26 [Lubrication Type] G-26 Applying Point [Lubrication Amount] Adequate dose [Lubrication Amount] Adequate dose...
  • Page 62 EPSON Perfection 4490 Photo Revision B [Lubrication Point] Carriage guide rail on the TPU Applying Point Lower Housing [Lubrication Type] G-26 [Lubrication Amount] Adequate dose [Remarks] Use a brush to apply it Figure 6-5. Lubricating the TPU Lower Housing [Lubrication Point]...

  • Page 63: Chapter 7 Appendix

    C H A P T E R APPENDIX...

  • Page 64: Connectors

    EPSON Perfection 4490 Photo Revision B 7.1 Connectors 7.1.2 Connector Configuration The following table indicates the connector signal wiring on the electrical circuit SUB_C Board SUB_D Board boards of this product. Fluorescent Sensor Board Lamp 7.1.1 Connector Reference Table Board...

  • Page 65: Circuit Diagrams

    EPSON Perfection 4490 Photo Revision B 7.2 Circuit Diagrams The control electrical circuit diagrams of this product are shown on the following pages. Main Board Panel Board DRV Board Image Sensor Board SUB Board SUB_C Board SUB_D Board APPENDIX Circuit Diagrams...
  • Page 66 Model : GT-X750,Perfection 4490 Photo Board : Main Board Rev. Sheet : 1/1...
  • Page 67 Model : GT-X750, Perfection 4490 Photo Model : GT-X750, Perfection 4490 Photo Board : PNL Board Board : PNL Board Rev. Rev. Sheet : 1/1 Sheet : 1/1...
  • Page 68 Model : GT-X750, Perfection 4490 Photo Board : DRV Board Assy Rev. Sheet : 1/1...
  • Page 69 Model : GT-X750, Perfection 4490 Photo Board : Image Sensor Board Rev. Sheet : 1/1...
  • Page 70 Model : GT-X750, Perfection 4490 Photo Board : SUB Board Rev. Sheet : 1/1...
  • Page 71 Model : GT-X750, Perfection 4490 Photo Board : SUB-C Board Rev. Sheet : 1/1...
  • Page 72 Model : GT-X750, Perfection 4490 Photo Board : SUB-D Board Rev. Sheet : 1/1...

  • Page 73: Exploded Diagram

    EPSON Perfection 4490 Photo Revision B 7.3 Exploded diagram The exploded diagrams of this product are shown on the following pages. B176-ACCE-0012 B176-CASE-0012 B176-CASE-002 B176-MECH-001 APPENDIX Exploded diagram...
  • Page 74 GT-X750 / Perfection 4490 Photo NO.1 Rev.02 B176-ACCE-0012...
  • Page 75 GT-X750 / Perfection 4490 Photo NO.2 Rev.02 B176-CASE-0012...
  • Page 76 G T -X750 / P erfection 4490 P hoto NO.3 R ev.01 B 176-C AS E -002...
  • Page 77 G T -X750 / P erfection 4490 P hoto NO.4 R ev.01 B 176-ME C H-001...

  • Page 78: Parts List

    EPSON Perfection 4490 Photo Revision B 7.4 Parts List Table 7-1. Perfection4490 Photo Parts List Ref No. Part Name Remarks HARNESS,POWER SWITCH ASSY Table 7-1. Perfection4490 Photo Parts List CARRIAGE ASSY.,ASP MOTOR,CR Ref No. Part Name Remarks INSULATOR,MOTOR,CR NON FIG HARNESS,USB 2.0 ASSY.

  • Page 79: Optional Part; Auto Document Feeder

    Within 1 dot (within 2 dots in the top and bottom 5cm areas of the document for 600dpi Connectivity scanning) This ADF Unit can be connected to the Perfection 4490 Photo. 7.5.2.3 Supported documents 7.5.2 Basic specifications Applicable document color...
  • Page 80 EPSON Perfection 4490 Photo Revision B 7.5.2.4 Electrical characteristics 7.5.2.8 Compliant Standards (Electromagnetic interference resistance, electrical noise resistance) Rated input voltage DC 24 26.4V − DC 5 ± 5%V Electromagnetic interference resistance VCCI Class 2 Rated input current : 0.8A : 0.2A...

  • Page 81: Interface

    EPSON Perfection 4490 Photo Revision B 7.5.3 Interface 7.5.2.10 Weight and dimensions Weight Approx. 2.4kg Connector shape8-pin mini-DIN (male) Dimensions 319 x 539 x 137mm (outline shown below) Figure 7-3. Connector Shape Table 7-2. Pin Assignment Pin No. Signal Explanation...

  • Page 82: Adf; Disassembly

    EPSON Perfection 4490 Photo Revision B 7.6 ADF; Disassembly This section explains the disassembling procedure of the main component units and parts of the optional part ADF. Unless otherwise explained, reassemble the ADF in the reverse procedure of disassembling. 7.6.1 Removal of B81334 Main Board Remove the screws that are securing the Main Board Cover at the bottom, and remove the Main Board Cover.

  • Page 83: Asf Part

    EPSON Perfection 4490 Photo Revision B 7.6.2 ASF Part Disconnect the six cables from the Main Board. Remove the Top Cover. Open the Cover and remove the Guides (black). Release the engagement with the internal paper guide, and remove the Cover from the Case Shaft.
  • Page 84 EPSON Perfection 4490 Photo Revision B 7.6.2.1 ASF Part Disassembly Remove the two screws (black, CB + flat washers) at both ends of the Cover. Remove the two screws (gold, P-TITE + flat washers) from the bottom, and remove the Cover.
  • Page 85 EPSON Perfection 4490 Photo Revision B Remove the four screws (gold, P-TITE + flat washers), and remove the Motor/ Solenoid Assembly. Three screws When removing the screws shown in Figure 7-12, be careful since C A U T I O N the gear will pop out.
  • Page 86 EPSON Perfection 4490 Photo Revision B 7.6.2.2 Gear Frame Release the Locks of the two Bushings (white plastic parts on both sides). Remove the Roller Shaft (front). Insert and push a flat-blade screwdriver into the gap shown below. Push up the White Reference Plate forcibly in the direction of an arrow to disengage the Hook.
  • Page 87 EPSON Perfection 4490 Photo Revision B Release the Locks of both Bushings, and remove the Roller Shaft (rear). Remove Roller Remove the three screws that are securing the metal fittings, and remove the metal Shaft (rear). fittings. When removing the screw nearest to the Lever, push the Release Lever in the direction of an arrow.
  • Page 88 EPSON Perfection 4490 Photo Revision B Remove the two screws (gold, P-TITE), and remove the black Plastic Frame. After removing screws, remove this black Remove two screws. Plastic Frame. Figure 7-20. Removal of Plastic Frame APPENDIX ADF; Disassembly...

  • Page 89: Disassembly Of Asf And Frame

    EPSON Perfection 4490 Photo Revision B 7.6.3 Disassembly of ASF and Frame ASF Assembly After moving the Paper Edge Guide in the direction of an arrow, remove the one screw (silver, P-TITE + flat washer). Separate the ASF Assembly and Frame Part.
  • Page 90 EPSON Perfection 4490 Photo Revision B Remove the Actuator and PE Board Assembly. Figure 7-23. Removal of Actuator and PE Board Assembly 1 PE Board Assembly Actuator Figure 7-24. Removal of Actuator and PE Board Assembly 2 APPENDIX ADF; Disassembly...

  • Page 91: Disassembly Of Asf Assembly

    EPSON Perfection 4490 Photo Revision B 7.6.4 Disassembly of ASF Assembly 7.6.4.1 Removal of ASF Feed Roller Assembly Remove the Right Hopper Release Lever from the right end of the ASF Feed ASF Feed Roller Shaft Securing Bush Roller Shaft.
  • Page 92 EPSON Perfection 4490 Photo Revision B Remove the projection of the ASF Frame from the top left mounting hole of the ASF Hopper Assembly. Mounting hole at top left of ASF Hopper Fit the cam on the right of the ASF Hopper Assembly in the notch (rectangular) of...
  • Page 93 EPSON Perfection 4490 Photo Revision B The following shows the parts development diagram of the ASF Assembly. Hopper Assembly Brake Lever ASF HP Detection Torsion Spring 41.2 Wheel ASF Frame Left Hopper Release Lever Right Hopper Release Lever Left Feed Roller...
  • Page 94 EPSON Perfection 4490 Photo Revision B When removing or reinstalling the ASF Hopper Assembly, use C H E C K care so that the grease on the Cam will not adhere to any other P O I N T parts. If it has adhered, wipe it completely.
  • Page 95 EPSON Perfection 4490 Photo Revision B After reinstalling the right Feed Roller Assembly to the ASF C H E C K Frame, make sure that the right Feed Roller Assembly is P O I N T securely locked by the Hook in the right side rear part of the ASF Frame.
  • Page 96 EPSON Perfection 4490 Photo Revision B 7.6.4.2 Disassembly of Feed Roller Assembly Feed Roller Compression Cover Remove the two hooks that are used to install the Feed Roller Cover to the Feed Spring 1.66 Roller Assembly. Remove the two Hooks that are used to install the Feed Roller Assembly to the Frame part in the circumference of the Feed Roller Assembly shaft hole.

  • Page 97: Adf; Lubrication

    EPSON Perfection 4490 Photo Revision B 7.7 ADF; Lubrication <Lubrication Gear point> Lubrication is required when any part of the Carriage Unit of the scanner has been Pinion replaced or the Carriage moves with noticeably large operation noise. The specified <Oil type>...

  • Page 98: Adf; Exploded Diagram

    EPSON Perfection 4490 Photo Revision B 7.8 ADF; Exploded diagram The exploded diagrams of this product are shown on the following pages. B813-OPTI-1 B813-OPTI-2 B813-OPTI-3 B813-OPTI-4 B813-OPTI-5 APPENDIX ADF; Exploded diagram...
  • Page 99 Automatic Document Feeder for GT-X750 / Perfection 4490 No.01 Rev.01 B813-OPTI-1...
  • Page 100 Automatic Document Feeder for GT-X750 / Perfection 4490 No.02 Rev.01 B813-OPTI-2...
  • Page 101 Automatic Document Feeder for GT-X750 / Perfection 4490 No.03 Rev.01 B813-OPTI-3...
  • Page 102 Automatic Document Feeder for GT-X750 / Perfection 4490 No.04 Rev.01 B813-OPTI_4...
  • Page 103 Automatic Document Feeder for GT-X750 / Perfection 4490 No.05 Rev.01 B813-OPTI_5...

  • Page 104: Adf; Parts List

    EPSON Perfection 4490 Photo Revision B 7.9 ADF; Parts List Table 7-4. Automatic Document Feeder Parts List Ref No. Part Name WIRE,STOPPER Table 7-4. Automatic Document Feeder Parts List SHEET GUIDE;B GROUNDING PLATE Ref No. Part Name ANTI-STATIC BRUSH;B EARTH WIRE,A...
  • Page 105 EPSON Perfection 4490 Photo Revision B Table 7-4. Automatic Document Feeder Parts List Table 7-4. Automatic Document Feeder Parts List Ref No. Part Name Ref No. Part Name SOLENOID ASSY. MOUNTING PLATE,REAR,R DAMPER,CR ROLLER ASSY.,PF;B SPACER,SOLENOID ROLLER ASSY.,EJ FLANGE BUSHING,6 COMBINATION GEAR,15.2,24...

Table of Contents