Epson Perfection 640U Series Service Manual Download

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EPSON Perfection 640U

Color Image Scanner

SESC00-005

SERVICE MANUAL

Summary of Contents for Perfection 640U Series

Page 1: ...EPSONPerfection640U Color Image Scanner SESC00 005 SERVICE MANUAL SERVICE MANUAL SERVICE MANUAL SERVICE MANUAL ...

Page 2: ...accuracy of the contents of this manual However should any errors be detected SEIKO EPSON would greatly appreciate being informed of them 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 General Notice Other product names used herein are for identifica...

Page 3: ...HIS MANUAL DO NOT CONNECT THE UNIT TO A POWER SOURCE UNTIL INSTRUCTED TO DO SO WHEN THE POWER SUPPLY CABLE MUST BE CONNECTED USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS WARNING 1 REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTIFIED REPAIR TECHNICIAN 2 MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE LISTED ON THE SERIAL NU...

Page 4: ...cifications of the product CHAPTER 2 OPERATING PRINCIPLES Describes the theory of electrical and mechanical operations of the product CHAPTER 3 TROUBLESHOOTING Provides the step by step procedures for troubleshooting CHAPTER 4 DISASSEMBLY AND ASSEMBLY Describes the step by step procedures for disassembling and assembling the product CHAPTER 5 ADJUSTMENTS This product reqires no adjusment CHAPTER 6...

Page 5: ...EPSON Perfection 640U Rev A Revision Status Revision Issued Date Description A July 13 2000 First Release ...

Page 6: ...pter 4 Assembly and Disassembly 4 1 Overview 24 4 1 1 Precautions 24 4 1 2 Tools 24 4 1 3 Screws 24 4 2 Disassembly Procedures 25 4 2 1 Releasing the Carriage Lock 25 4 2 2 Document Cover Removal 26 4 2 3 Upper Housing Removal 27 4 2 4 Inverter Lamp Inverter Board Removal 28 4 2 5 Carriage Unit Removal 31 4 2 6 Carriage Motor Timing Belt Removal 34 4 2 7 Main Board Removal 36 4 2 8 Panel Board Rem...

Page 7: ...C H A P T E R 1 PRODUCTDESCRIPTION ...

Page 8: ...device Color CCD line sensor Maximum read area 8 5 x 11 7 216 x 297 mm Maximum effective picture element 5100 x 7020 pixels 600 dpi Scanning resolution Main 600 dpi Sub 2400 dpi with micro step Output resolution 72 96 150 300 600 1200 2400 9600 dpi Gray scale levels 12bits pixel In 12bits Out 8bits Color separation By the color filter of CCD Scanning speed 600 dpi Color 16 msec line Monochrome bi ...

Page 9: ...e AC 100 120V 10 or AC 220 240V 10 Rated current 0 4A Input AC 100V or 0 2A Input AC 200V Rated frequency range 50 60Hz Input frequency range 49 5 60 5 Hz Rated output voltage DC24V Rated output current 0 8A Insulation resistance 10 M Ω at 500 VDC between AC line and chassis Dielectric strength AC 1 2kV 1 min between AC line and chassis SAFETY EMC EPA Safety NOM UL1950 CSA C22 2 No 950 EN60950 IEC...

Page 10: ...st should be avoided Illumination Operation under direct sunlight or near strong light source is not guaranteed and should be avoided DOCUMENT Reflective type Documents which has a smooth surface such as printing and photograph DIMENSION Dimension 269 W x 435 D x 93 H mm Refer to Figure 1 2 Weight 2 8 Kg Figure 1 2 Exterior Dimension of the Perfection 640U 269mm 435mm 93mm ...

Page 11: ...Assignment Table 1 2 Configuration Pin No Signal 1 VCC 2 Data 3 Data 4 GND 1 2 3 4 Element Description Device Class Vendor specific Subclass Vendor specific Protocol Vendor specific Maximum packet size for endpoint 0 8byte Vendor ID 0x04B8 Seiko EPSON Corp Product ID 0x010B Number of possible configurations 1 Configuration Number of interfaces supported by this configuration 1 Characteristics Self...

Page 12: ...scanning and printing by pushing button This button is not User programmable SCAN Button The SCAN Button is assigned to the PhotoDeluxe on ESP Scanning starts full automatically and export a image data to PhotoDeluxe This button is not User programmable Category Command Name Code Execute Command Request Identity ESC I Request Identity 2 ESC i Request Status ESC F Request Extended Status ESC f Star...

Page 13: ...rameter Maintain at current settings Scanner sends NACK and waits for the next command or parameter Indicator Red LED lighting up Remedy Once the correct command is received the error condition is cleared INTERFACE ERROR Cause Detects the wrong action in the communication procedure Disposition Lamp goes off and scanner stops operating Indicator Red LED High speed blinking Remedy Turn power off and...

Page 14: ...EPSON Perfection 640U Revision A Product Description Manuscript Table 14 1 8 Manuscript Table Dimension 216 mm Horizontal x 297 mm Vertical 216 mm 3 2 mm 297 mm Front 3 2 mm Origin Point ...

Page 15: ...C H A P T E R 2 OPERATINGPRINCIPLES ...

Page 16: ...the sensor s control and driver circuits Inverter Board This board generates voltage used to drive the lamp The board pressures up 24VDC and converts it from direct current to alternating current Lamp A white cold fluorescent lamp is used as the light source Mirror and Lens Mechanism Light emitted to the document reaches the CCD sensor via the mirror and lens mechanism in the carriage unit where t...

Page 17: ... are simultaneously performed one after another Figure 2 3 Carriage Movement The carriage unit slides in the sub scan direction along the guide rail To slide the carriage the carriage CR motor drives the timing belt attached to the carriage unit by conveying torque via the drive pulley and transmission gear Scanning start position is determined by CR HP sensor which is located on the control board...

Page 18: ...jor ICs Figure 2 5 Control Circuit Diagram IC Location Functions M37920 IC11 CPU 24 bit Address Bus 16 bit Data Bus SDM4260CLU 6S IC6 DRAM 256k x 16bit BA033FP E2 IC11 Regulator IC 3 3 VDC NJM78M05DLA TE1 IC7 Regulator IC 5 VDC E02A32SA IC9 ASIC Manages the following Input image signal correction CCD control USB interface control Image processing Memory control Data in output control A3957SLBTR IC...

Page 19: ...C H A P T E R 3 TROUBLESHOOTING ...

Page 20: ... NACK and waits for the next command or parameter Remedy Once the correct command is received the error condition is cleared Red LED High speed blinking Goes off after 30 minutes Interface Error Cause Detects the wrong action in the communication procedure Disposition Lamp goes off and scanner stops operating Remedy Turn power off and then turn it on again Plug out and in the USB connector Accepta...

Page 21: ...onnectors disconnected Yes Connect any disconnected connectors No Replace the main board Table 3 4 The carriage unit does not operate Cause Step Checkpoints Finding Remedy CN3 on the main board is disconnected 1 Check that CN3 is disconnected Yes Connect CN3 on the main board properly The carriage drive mechanism is defective 2 Is grease G 26 properly applied See Chapter 6 No Apply grease to the s...

Page 22: ...Replace the inverter board The main board is defective 6 Replace the main board Table 3 7 Image is not read clearly Cause Step Checkpoints Finding Remedy Any mirror in the carriage unit or the surface of the lamp is dirty 1 After cleaning the mirror s check that image is read clearly No Clean the surface of the lamp The CCD sensor board is defective 2 Replace the carriage unit The main board is de...

Page 23: ...C H A P T E R 4 ASSEMBLYANDDISASSEMBLY ...

Page 24: ...nces W A R N I N G Disconnect the power cable before disassembling or assembling the scanner C A U T I O N When servicing note the points below Consider the size of the scanner and make enough room for servicing Since this scanner is a precision equipement service it on a flat level heavy duty table R e a r B a c k F r o n t R i g h t L e f t E P S O N I n s i d e Table 4 1 Tools Names Availabilit...

Page 25: ...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 Figure 4 2 Carriage lock position Released Locked C A U T I O N When locking the carriage for transporting the scanner make sure the carriage is at the home position ...

Page 26: ...bly and Disassembly Disassembly Procedures 26 4 2 2 Document Cover Removal 1 Open the Document Cover 2 Lift the Document Cover by its edges to remove it Figure 4 3 Document Cover Removal 1 Figure 4 4 Document Cover Removal 2 Document Cover ...

Page 27: ...x8 at the back of the scanner body 4 Lifting up the rear end of the Upper Housing release the two hooks with pushing the Upper Housing toward the front and then remove the Upper Housing Figure 4 5 Upper Housing Removal 1 Figure 4 6 Upper Housing Removal 2 Figure 4 7 After Removing the Upper Housing C A U T I O N When removing the Upper Housing make sure two hooks are released from the Lower Housin...

Page 28: ... 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 5 Using a standard screw driver lift up the carriage cover in the Carriage Unit and then move it to the back to remove it See Figure 4 9 Figure 4 8 Carriage Unit Disassembly 1 Figure 4 9 Carriage Unit Disassembly 2 CCP Screws M3x8 ...

Page 29: ...edures 29 6 Disconnect the connector for the Inverter Lamp from the Inverter Board 7 Disconnect the 2 pin connector for the CCD sensor 8 Release the two hooks and then remove the Inverter Board Figure 4 10 Inverter Board Removal Hooks Connector 2 pin Connector Inverter Board ...

Page 30: ...Inverter Lamp Removal 2 C H E C K P O I N T When installing the Inverter Lamp be sure to connect it to the hook on the Carriage Cover When removing the Inverter Lamp be careful not to touch the Inverter Lamp directly The Inverter Board will be warm immediately after the power is turned off so wait for it to cool sufficiently before removing it Catches Carriage Cover Lamp Cover Carriage Cover Inver...

Page 31: ...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 Figure 4 13 Carriage Unit Removal 1 Figure 4 14 Carriage Unit Removal 2 Figure 4 15 Carriage Unit Removal 3 Clip Shaft CR Shaft ...

Page 32: ... M3x8 and then remove the Main Circuit Board Shield Plate 7 Use a standard screw driver to remove the Ferrite Core 8 Disconnect the FFC Cable white from the Main Circuit Board Figure 4 16 Shield Plate Removal Figure 4 17 Ferrite Core Removal 6 CBS Screw M3x8 6 CBP Screws M3x8 6 Main Board Cover FFC Cable Ferrite Core ...

Page 33: ...a standard screw driver to raise the Carriage Cover and then pull it backward See Section 4 2 4 3 Use a standard screw driver to remove the Ferrite Core 4 Disconnect the FFC Cable white from underneath the Carriage Unit connector and hook x2 Figure 4 18 FFC Cable Removal 1 Figure 4 19 FFC Cable Removal 2 C A U T I O N Do not touch the mirror when removing the FFC Cable Ferrite Core Hooks Connector...

Page 34: ...rriage Unit See Steps 1 8 in Section 4 2 5 5 Remove the six screws gold CBP M3x8 and then remove the main board cover 6 Remove the screw gold CBP M3x8 securing the CR Motor Unit 7 Disconnect the cable for the CR Motor Unit from the connector on the main board and then remove the CR Motor Unit Figure 4 20 Shield Plate Removal Figure 4 21 CR Motor Unit Removal 5 CBS Screw M3x8 5 CBS Screws M3x8 6 CB...

Page 35: ...rom the CR Motor Unit 1 Remove the E ring from the transmission gear 2 Remove the transmission gear 3 Remove the E ring from the drive pulley 4 Remove the drive pulley Figure 4 22 Timing Belt Removal Figure 4 23 Parts in the CR Motor Unit Timing Belt Drive Pulley Transmission Gear E ring Transmission Gear E ring Timing Belt Drive Pulley ...

Page 36: ...ection 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 5 Remove the six screws CBP M3x8 securing the main board cover and then remove the main board cover Figure 4 24 Main Board Removal 1 4 Carriage Unit 5 CBS Screws M3x4 ...

Page 37: ...F connector securing the Main Board 7 Disconnect the following cables from the corresponding connectors CR Motor CN3 carriage FFC Panel Board CN4 8 Remove the Main Board Figure 4 25 Main Board Removal 2 Figure 4 26 Main Board Removal 3 Figure 4 27 Main Board CP Screw M3x5 Carriage FFC Connector CN3 CR Motor CN4 Panel Board ...

Page 38: ...ection 4 2 1 2 Remove the Document Cover See Section 4 2 2 3 Remove the Upper Housing See Section 4 2 3 4 Disconnect the Connector CN1 and Hooks x2 and then remove the Panel Board Figure 4 28 Panel Board Removal C H E C K P O I N T In the following steps manually move the carriage back and forth slowly if necessary Connector Hooks Panel Board ...

Page 39: ...age 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 Remove the two screws CCP M3x8 securing the Carriage Rail and then remove the Carriage Rail Figure 4 29 Carriage Rail Removal CCP Screws M3x8 Carriage Rail ...

Page 40: ...the Carriage Unit See Steps 1 8 in Section 4 2 6 6 Release the timing belt from the Driven Pulley 7 Use a standard screw driver to remove the Torsion Spring from the Hook 8 Remove the screw CCP M3x8 securing the Driven Pulley Holder 9 Take out the Driven Pulley Holder 10 Remove the E ring 11 Remove the Driven Pulley Figure 4 30 Driven Pulley Removal Figure 4 31 Driven Pulley Unit CCP Screws M3x8 H...

Page 41: ...C H A P T E R 5 ADJUSTMENT ...

Page 42: ...EPSON Perfection 640U Revision A Adjustment 42 This scanner needs no adjustment at the level of the service including part replacement specified in Chapter 4 Disassembly and Assembly ...

Page 43: ...C H A P T E R 6 MAINTENANCE ...

Page 44: ...with neutral detergent If any trace is left wipe it off with a dry clean cloth again 6 1 2 Lubrication You need to lubricate the carriage unit if you have replaced it or notice it making abnormal noise See the following tables for the recommended grease type and points to apply it Table 6 1 Recommended Grease EPSON exclusive Not on the market Table 6 2 Lubrication Points Figure 6 1 Lubrication Poi...

Page 45: ...C H A P T E R 7 APPENDIX ...

Page 46: ...AIN Panel Board 6 pin CN4 CN1 CN1 18 pin CCD Board 2 pin CN2 CN1 Inverter Board Lamp 2 pin CN2 CR Motor CN1 Connector Number Description Number of Pins Refer to B125MAIN Board CN1 To the CCD Sensor Board 18 Table 7 2 CN2 AC Input 2 Table 7 3 CN3 To the CR Motor 4 Table 7 4 CN4 To the Panel Board 6 Table 7 5 CN5 To the USB Cable 4 Table 1 1 CCD Sensor Board CN1 To the Main Board 18 Table 7 2 CN2 To...

Page 47: ...ble 7 7 Inverter Board CN2 Pin No Signal I O 1 3 5 7 18 GND 2 B I 4 R I 6 G I 8 B SH O 9 R SH O 10 G SH O 11 SH O 12 12V O 13 F1X O 14 F2X O 15 RS O 16 5V O 17 24V O Pin No Signal I O 1 24V I 2 GND Pin No Signal I O 1 BX O 2 AX O 3 B O 4 A O Pin No Signal I O 1 GND 2 OP LED O 3 ERR LED O 4 PM SW1 I 5 PM SW2 I 6 PM SW3 I Pin No Signal I O 1 24 O 2 GND Pin No Signal I O 1 LAMP O 2 LAMP O ...

Page 48: ...EPSON Perfection 640U Revision A Appendix Circuit Diagram 48 7 2 Circuit Diagram The figure on the next page shows the circuit diagram of B125 MAIN B125 MAIN BOARD ...

Page 49: ...Not mounted Not mounted Not mounted Not mounted for check side B IC Socket Not mounted Not mounted Not mounted Not mounted Not mounted For USB connector detection ...

Page 50: ...MENT 136 CLIP SHAFT 450 BOARD ASSY PNL 105 FERRITE CORE 137 PULLEY DRIVE 500 CARRIAGE ASSY 106 RAIL CR 138 PULLEY IDLE 501 FERRITE CORE 107 FOOT 140 C B P TITE SCREW 3X8 F ZN 502 HARNESS FFC 108 DOUBLE SIDE TAPE 22X10 141 C C P TITE 3X8 F ZB 503 C C P TITE 3X8 F ZB 109 HOOK HOUSING 142 C P SCREW 504 COVER CARRIAGE 110 COVER MAIN BOARD 150 MOTOR ASSY CR 505 LAMP SET ASP N 111 BASE PLATE MAIN BOARD ...

Page 51: ...grams 51 133 141 131 137 150 140 500 400 401 160 300 134 136 103 101 104 100 135 153 132 135 102 141 105 108 141 130 106 112 201 107 107 109 109 138 151 152 111 450 200 110 A A 140 140 140 140 120 142 140 See next page GT 6700U Perfection 640U No 01 Rev 01 10234 140 140 ...

Page 52: ...EPSON Perfection 640U Revision A Appendix Parts List and Explode Diagrams 52 503 507 502 505 509 506 501 504 508 503 GT 6700U Perfection 640U No 02 Rev 01 10234 ...

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