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Epson 1240U Service Manual

Color image scanner
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SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
Color Image Scanner
EPSON Perfection 1240U
®
Perfection 1240U PHOTO
SESC00-008

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Summary of Contents for Epson 1240U

  • Page 1 SERVICE MANUAL SERVICE MANUAL SERVICE MANUAL SERVICE MANUAL Color Image Scanner EPSON Perfection 1240U Perfection 1240U PHOTO ® SESC00-008...
  • Page 2 The contents of this manual are subject to change without notice. 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 2. 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 This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPSON Perfection 1240U and Perfection 1240U PHOTO. The instructions and procedures included herein are intended for the experienced repair technicians, and attention should be given to the precautions on the preceding page.
  • Page 5 EPSON Perfection 1240U Revision A Revision Status Revision Issued Date Description August 9, 2000 First Release...
  • Page 6: Table Of Contents

    EPSON Perfection 1240U Revision A Contents Chapter 1 Product Description 4.2.1 Releasing the Carriage Lock ............27 4.2.2 Document Cover Removal ............28 1.1 Features ....................8 4.2.3 Upper Housing Removal ............... 29 4.2.4 Inverter Lamp / Inverter Board Removal ........30 1.2 Product Description ..................
  • Page 7 C H A P T E R PRODUCT DESCRIPTION...
  • Page 8: Features

    EPSON Perfection 1240U Revision A 1.1 Features EPSON Perfection 1240U consists of two models : 1240U and 1240U PHOTO. Major features are as follows. Perfection 1240U PHOTO has the TPU (transparency unit) as standard unit. MAJOR FEATURES Best suited speed / best image quality A4 color image scanner for...
  • Page 9: Product Description

    EPSON Perfection 1240U Revision A 1.2 Product Description Brightness: 7 levels Line Art: Fixed threshold TET (Text Enhancement Technology) GENERAL SPECIFICATION Digital halftoning: Product Type: Flatbed color image scanner Error Diffusion 3 modes (A, B, C) (Bi-level, Quad-level)Dither (Resident) 4 modes (A, B, C)
  • Page 10 EPSON Perfection 1240U Revision A ELECTRICAL SPECIFICATIONS SAFETY, EMC, EPA Scanner unit electrical specifications Safety: UL 1950 Rated input voltage: DC24V CSA C22.2 NO.950 Power consumption: Approx.20W (Operating) EN60950 Approx.10W (Stand-by) IEC60950 EMC: FCC Part15 Subpart B Class B Rated input current: 0.8A : DC24V...
  • Page 11 DOCUMENT Reflective type: Documents which has a smooth surface such as a printing and photograph. Transparency type (with transparency unit) Reversal film Negative film 269mm Figure 1-2. Exterior Dimension of the Perfection 1240U Product Description Product Description...
  • Page 12: Interface Specifications

    Revision A 1.3 Interface Specifications Table 1-2. Configuration Element Description This section provides specifications of the USB, the only interface supported by the Perfection 1240U and the Perfection 1240U PHOTO. • Class: Vendor specific • Subclass: Vendor specific 1.3.1 USB Specifications •...
  • Page 13: Control Codes

    EPSON Perfection 1240U Revision A 1.4 Control Codes classification Name Code Set Half-tone Processing ESC Bi ESC/I (B8) and FS The command levels of this scanner are . The commands supported are shown in the table below. Set Auto Area Segmentation...
  • Page 14: Switches

    Same functions as 'Stylus Scan 2000/2500'. Achieve easy scanning with three buttons. START Button: EPSON Smart Panel (ESP) is run, and export a image data to application which user assigned to relate with the START button. (This button is user programmable)
  • Page 15: Error Indications

    EPSON Perfection 1240U Revision A 1.7 Error Indications FATAL ERROR Cause: Lamp is broken. COMMAND ERROR Power is turned on or command is received without removing the transportation lock. Cause: Undefined command or undefined command Scanner unit fault. parameter is received.
  • Page 16: Manuscript Table

    EPSON Perfection 1240U Revision A 1.8 Manuscript Table Dimension: 216 mm (Horizontal) x 297 mm (Vertical) 3 ± 2 mm 216 mm 3 ± 2 mm Origin Point 297 mm Front Product Description Manuscript Table...
  • Page 17: Chapter 2 Operating Principles

    C H A P T E R OPERATING PRINCIPLES...
  • Page 18: Engine Mechanism

    EPSON Perfection 1240U Revision A 2.1 Engine Mechanism CCD Sensor Board: This board has Color CCD line sensor (independent R,G,B), and controls it and drives circuit. This section explains the engine function and operating principles. Engine can be divided into Carriage Unit and Carriage Move Mechanism.
  • Page 19: Carriage Move Mechanism

    EPSON Perfection 1240U Revision A 2.1.2 Carriage Move Mechanism Carriage Unit slides into sub-scan direction along with the guide rail. For this sliding operation, the carriage motor drives the timing belt attached to the Scanning image is performed in the main scan direction (=1 line) by the CCD...
  • Page 20: Control Circuit

    EPSON Perfection 1240U Revision A 2.2 Control Circuit The CPU (IC12) of this scanner is a one-tip 16-bit bus CPU operating at 20MHz. ASIC (IC10) manages input signal correction, image processing, and SRAM SDRAM controlling the CCD sensor board and USB interface. The power supply control...
  • Page 21: Chapter 3 Troubleshooting

    C H A P T E R TROUBLESHOOTING...
  • Page 22: Overview

    EPSON Perfection 1240U Revision A 3.1 Overview Table 3-1. Errors Detected by the Self-Diagnostic Function This chapter describes troubleshooting procedures for this scanner. LED Condition Error Type (Cause Remedy) Red LED lighting up Command Error 3.2 Self-Diagnostic Function Cause: Undefined command or undefined command parameter is received.
  • Page 23: Troubleshooting

    EPSON Perfection 1240U Revision A 3.3 Troubleshooting Table 3-4. The carriage unit does not operate. Cause Step Checkpoints Finding Remedy This section describes how to troubleshoot problems according to CN3 on the Check that CN3 is disconnected. Connect CN3 on exhibited phenomenons.
  • Page 24 EPSON Perfection 1240U Revision A Table 3-6. The lamp does not light up. Table 3-8. USB Interface Error Cause Step Checkpoints Finding Remedy Cause Step Checkpoints Finding Remedy CN1 on the Check that CN1 is Connect CN1 on The host does On the Windows, access Replace the host.
  • Page 25: Chapter 4 Assembly And Disassembly

    C H A P T E R ASSEMBLY AND DISASSEMBLY...
  • Page 26: Overview

    4.1 Overview 4.1.2 Tools Use the tools specified in Table 4-1. This chapter describes procedures for disassembling the EPSON Table 4-1. Tools Perfection 1240U. Unless otherwise specified, the scanner can be disassembled by reversing the disassembly procedures. Names Availability Part Number...
  • Page 27: Disassembly Procedures

    EPSON Perfection 1240U Revision A 4.2 Disassembly Procedures 4.2.1 Releasing the Carriage Lock 1. Disconnect the AC adapter from the scanner body. 2. Check that the carriage lock at the back of the scanner body is released. Released Locked Figure 4-2. Carriage lock position...
  • Page 28: Document Cover Removal

    EPSON Perfection 1240U Revision A 4.2.2 Document Cover Removal 1. Open the Document Cover. 2. Lift the Document Cover by its edges to remove it. Document Cover Figure 4-3. Document Cover Removal (1) Figure 4-4. Document Cover Removal (2) Assembly and Disassembly...
  • Page 29: Upper Housing Removal

    EPSON Perfection 1240U Revision A 4.2.3 Upper Housing Removal 1. Release the Carriage Lock. (See Section 4.2.1.) Two Hooks on the Front 2. Remove the Document Cover. (See Section 4.2.2.) 3. Remove the two screws (gold, CBP, M3x8) at the back of the scanner body.
  • Page 30: Inverter Lamp / Inverter Board Removal

    EPSON Perfection 1240U Revision A 4.2.4 Inverter Lamp / Inverter Board Removal 1. Release the Carriage Lock. (See Section 4.2.1.) 2. Remove the Document Cover. (See Section 4.2.2.) 3. Remove the Upper Housing. (See Section 4.2.3.) 4. Remove the two screws (CCP, M3x8) on the Carriage Unit. (See Figure 4-8.)
  • Page 31 EPSON Perfection 1240U Revision A 6. Disconnect the connector for the Inverter Lamp from the Inverter Board. Connector 7. Disconnect the 2-pin connector for the CCD sensor. Inverter Board 8. Release the two hooks, and then remove the Inverter Board.
  • Page 32 EPSON Perfection 1240U Revision A 9. Remove the Lamp Cover from the Carriage Cover. 10. Remove the Inverter Lamp from the carriage cover. • When installing the Inverter Lamp, be sure to C H E C K P O I N T connect it to the hook on the Carriage Cover.
  • Page 33: Carriage Unit Removal

    EPSON Perfection 1240U Revision A 4.2.5 Carriage Unit Removal 1. Release the Carriage Lock. (See Section 4.2.1.) 2. Remove the Document Cover. (See Section 4.2.2.) 3. Remove the Upper Housing. (See Section 4.2.3.) 4. Remove the Clip Shaft. 5. Raise the Carriage Unit slightly to remove it from the timing belt, remove the Carriage Guide Shaft, and then remove the Carriage Unit.
  • Page 34 EPSON Perfection 1240U Revision A 6. Remove the six screws (gold, CBP, M3x8), and then remove the Main Circuit Board Shield Plate. 6. CBS Screw (M3x8) 7. Use a standard screw driver to remove the Ferrite Core. 6. Main Board Cover 8.
  • Page 35 EPSON Perfection 1240U Revision A 9. FFC Cable Removal 1) Remove the two screws (CCP, M3x8) on top of the Carriage Unit. (See Section 4.2.4.) 2) Remove the Carriage Cover. (Use a standard screw driver to raise the Carriage Cover and then pull it backward.) (See Section 4.2.4.)
  • Page 36: Carriage Motor / Timing Belt Removal

    EPSON Perfection 1240U Revision A 4.2.6 Carriage Motor / Timing Belt Removal 5. CBS Screw (M3x8) 1. Release the Carriage Lock. (See Section 4.2.1.) 5. Main Board Cover 6. CBS Screws (M3x8) 2. Remove the Document Cover. (See Section 4.2.2.) 3.
  • Page 37 EPSON Perfection 1240U Revision A 8. Follow the steps below to remove the Timing Belt from the CR Motor Unit. Transmission Gear 1) Remove the E-ring from the transmission gear. Drive Pulley 2) Remove the transmission gear. 3) Remove the E-ring from the drive pulley.
  • Page 38: Main Board Removal

    EPSON Perfection 1240U Revision A 4.2.7 Main Board Removal 5. CBS Screws (M3x4) 1. Release the Carriage Lock. (See Section 4.2.1.) 2. Remove the Document Cover. (See Section 4.2.2.) 3. Remove the Upper Housing. (See Section 4.2.3.) 4. Slide the Carriage Unit slowly until you see the whole main board cover.
  • Page 39 EPSON Perfection 1240U Revision A 6. Remove the two screws (CP, M3x5) securing the Main Board. Carriage FFC Connector 7. Disconnect the following cables from the corresponding connectors; CN4 (Panel Board) CR Motor - CN3, carriage FFC, Panel Board - CN4.
  • Page 40: Panel Board Removal

    EPSON Perfection 1240U Revision A 4.2.8 Panel Board Removal 1. Release the Carriage Lock. (See Section 4.2.1.) 2. Remove the Document Cover. (See Section 4.2.2.) Hooks 3. Remove the Upper Housing. (See Section 4.2.3.) 4. Disconnect the Connector (CN1) and Hooks (x2), and then remove the Panel Board.
  • Page 41: Carriage Rail Removal

    EPSON Perfection 1240U Revision A 4.2.9 Carriage Rail Removal CCP Screws (M3x8) 1. Release the Carriage Lock. (See Section 4.2.1.) 2. Remove the Document Cover. (See Section 4.2.2.) 3. Remove the Upper Housing. (See Section 4.2.3.) 4. Remove the Carriage Unit. (See Steps 1-6 in Section 4.2.5.) 5.
  • Page 42: Driven Pulley Removal

    EPSON Perfection 1240U Revision A 4.2.10 Driven Pulley Removal Torsion Spring Hooks 1. Release the Carriage Lock. (See Section 4.2.1.) CCP Screws (M3x8) 2. Remove the Document Cover. (See Section 4.2.2.) 3. Remove the Upper Housing. (See Section 4.2.3.) Driven Pulley Holder 4.
  • Page 43: Chapter 5 Adjustment

    C H A P T E R ADJUSTMENT...
  • Page 44 EPSON Perfection 1240U Revision A This scanner needs no adjustment at the level of the service, including part replacement, specified in Chapter 4 “Disassembly and Assembly”. Adjustment...
  • Page 45: Chapter 6 Maintenance

    C H A P T E R MAINTENANCE...
  • Page 46: Overview

    See the following tables for the recommended grease type and points to apply it. Table 6-1. Recommended Grease Grease Type Contents Part Number Availability G-26 B702600001 G-26 *: EPSON exclusive (Not on the market) Figure 6-1. Lubrication Points Maintenance Overview...
  • Page 47: Chapter 7 Appendix

    C H A P T E R APPENDIX...
  • Page 48: Overview

    EPSON Perfection 1240U Revision A 7.1 Overview 7.1.2 Connector Assignment This section provides useful information for servicing this scanner. Table 7-1. Connector Summary- B124MAIN Connector Number 7.1.1 Interconnection Description Refer to: Number of Pins B124MAIN Board Following figures shows interconnection of the scanner.
  • Page 49 EPSON Perfection 1240U Revision A Table 7-2. Main Board - CN1 Table 7-5. Main Board - CN4 Pin No. Signal Pin No. Signal 1, 3, 5, 7, 18 OP-LED ERR-LED PM-SW1 B-SH PM-SW2 R-SH PM-SW3 G-SH Table 7-6. Main Board - CN6 Pin No.
  • Page 50: Circuit Diagram

    EPSON Perfection 1240U Revision A 7.2 Circuit Diagram The figure on the next page shows the circuit diagram of B124 MAIN. B124 MAIN BOARD Appendix Circuit Diagram...
  • Page 52: Parts List And Explode Diagrams

    EPSON Perfection 1240U Revision A 7.3 Parts List and Explode Diagrams Table 7-9. Parts List Ref.# Description Ref.# Description Ref.# Description HOUSING ASSY.,LOWER;ASP TIMING BELT WIRE HARNESS HOUSING ASSY.,UPPER;ASP HOLDER ASSY.,PULLEY,DRIVEN AC ADAPTER OTHERS LEVER,MOUNT,CARRIAGE TORSION SPRING,238 POWER CABLE MAT,COVER,DOCUMENT...
  • Page 53 EPSON Perfection 1240U Revision A See next page. 160 (For JAPAN) GT-7700U/Perfection 1240U Perfection 1240U PHOTO No.01 Rev.01 10244 Figure 7-2. Exploded Diagram No.1 Appendix Parts List and Explode Diagrams...
  • Page 54 EPSON Perfection 1240U Revision A GT-7700U/Perfection 1240U Perfection 1240U PHOTO No.02 Rev.01 10244 Figure 7-3. Exploded Diagram No.2 Appendix Parts List and Explode Diagrams...
  • Page 55: Tpu; Parts List

    EPSON Perfection 1240U Revision A 7.4 TPU; Parts List Table below shows the parts list of TPU (Transparency Unit). Table 7-10. TPU Parts List Parts Name Number HOUSING ASSY.,UPPER B/L ASSY. COVER,ILLUMINATION HOUSING,LOWER HOUSING,BASE HOUSING,FASTEN,R HOUSING,FASTEN,L BOARD ASSY.,INVERTER HARNESS FOOT SHEET,SPACER C.B.B.
  • Page 56: Exploded Diagram For Tpu

    EPSON Perfection 1240U Revision A 7.5 Exploded Diagram for TPU 816 FOR EAI Perfection 1240U PHOTO / FILM ADAPTER No.04 Rev.01 10244 Figure 7-4. Exploded Diagram for TPU Appendix Exploded Diagram for TPU...