Epson 1250 - Perfection Photo Flatbed Scanner, Service Manual

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Epson 1250 - Perfection Photo Flatbed Scanner Service Manual Download Page 35

EPSON Perfection 1250/1250 PHOTO

Disassembly and Assembly

35

Figure 4-14. Timing Belt Removal

Figure 4-15. CR Motor Unit

4.2.6 Main Circuit Board Removal

Preparation:

"

Remove the document cover as described in

Document Cover

"

Remove the upper cover as described in

Upper Cover Removal

"

Release the carriage as described in

Carriage Lock Release

1.

Gently slide the carriage assembly forward until the main circuit board
shield plate can be seen.

2.

Remove two screws (CBP, M3x8) securing the main circuit board shield
plate, and then remove it.

3.

Disconnect the cables from the CR motor connector (CN5), carriage ribbon
cable connector (CN4) and control panel connector (CN3).

4.

Remove the main circuit board.

Figure 4-16. Main Circuit Board Removal

Drive Pulley

Timing Belt

E-Ring

Timing Belt

E-Ring

Drive Pulley

Carriage Assembly

CBP (M3x8) screws

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Summary of Contents for 1250 - Perfection Photo Flatbed Scanner

Page 1: ...EPSON Perfection1250 1250PHOTO Color Image Scanner TM PERF1250 Printed in U S A Service Manual ...

Page 2: ......

Page 3: ...EPSON Perfection 1250 1250 PHOTO Color Flatbed Scanner Service Manual ...

Page 4: ...ica Inc nor its affiliates shall be liable to the purchaser of this product or third parties for damages losses costs or expenses incurred by the purchaser or third parties as a result of accident misuse or abuse of this product or unauthorized modifications repairs or alterations to this product Epson America Inc shall not be liable for any damages or problems arising from the use of any options ...

Page 5: ... receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio television technician for help Warning The connection of a non shielded equipment interface cable to this equipment will invalidate the FCC Certification of this device and m...

Page 6: ...ems Chapter 4 Disassembly and Assembly Provides step by step instructions for disassembling the product Chapter 5 Maintenance Describes routine maintenance procedures Chapter 6 Appendix Provides additional information for reference Detailed specifications Connector diagram and pin assignments Electrical diagrams Parts list Exploded diagrams Symbols Used in This Manual DANGER Warnings must be follo...

Page 7: ...ply board and other electronic components C A U T I O N Repairs on EPSON products should be performed only by an EPSON certified repair technician Make certain that the source voltage 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 the available power source do not connect it to the power source Always verify tha...

Page 8: ...EPSON Perfection 1250 1250 PHOTO 8 ...

Page 9: ...riage Lock Release 30 Document Cover 31 Upper Cover Removal 31 Carriage Assembly Removal 32 Motor CR Timing Belt Removal 34 Main Circuit Board Removal 35 Control Panel Board Removal 36 Chapter 5 Maintenance Overview 41 Lubrication 41 Chapter 6 Appendix Specifications 45 Basic specifications 45 Basic TPU specifications 46 Electrical specifications 46 Resistance to electrical noise 47 Operating envi...

Page 10: ...EPSON Perfection 1250 1250 PHOTO 10 ...

Page 11: ...C H A P T E R 1 PRODUCTBASICS ...

Page 12: ......

Page 13: ...nner performs at the following speeds Command level ESC I D2 1 2 Control Panel The control panel includes four buttons as shown below Figure 1 1 Control Panel buttons Buttons The four buttons Start Photo Print Scan to E mail Scan to Web on the control panel can be used in conjunction with the scanner software to make scanning very easy Start Starts EPSON Smart Panel button function can be reassign...

Page 14: ...fection 1250 1250 PHOTO Product Basics 14 Indicator Lights Ready green Lit when the scanner is ready to receive commands Flashes when data is sent to or from the host computer Error red Lit when an error occurs ...

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

Page 16: ......

Page 17: ...olling them Inverter circuit board This board boosts the power supply voltage to 24 V DC and converts it from direct current to alternating current in order to drive the lamp cold cathode fluorescent lamp Lamp A cold cathode fluorescent lamp is used as the light source Mirror and lens mechanism The light that illuminates the document being scanned is reflected to the mirror and lens mechanism insi...

Page 18: ... data is then sent to the control circuit board When line n is being scanned the image data for line n 1 is processed at the same time so that scanning is continuously carried out Figure 2 3 Carriage Movement The carriage assembly slides along the guide rail in the sub scanning direction This movement is powered by the CR motor via the drive pulley to the timing belt which is secured to the carria...

Page 19: ...ach of the main ICs function Table 2 1 Description of Main ICs IC Location Function T224162B 35J IC1 DRAM 256 x 16bit NM24C02M8X IC2 Reset IC ILX555K IC4 CCD LM9833 IC5 ASIC Manages the following CCD control Image processing USB 1 1 Interface Stepping motor control Input image signal correction General purpose I O Programmable frequency divider Buffer control NJM78M120LA TE1 IC7 Regulator PC1 RPI ...

Page 20: ...EPSON Perfection 1250 1250 PHOTO Technical Overview 20 Figure 2 5 Control Circuit Block Diagram MAIN ...

Page 21: ...C H A P T E R 3 TROUBLESHOOTING ...

Page 22: ......

Page 23: ...the remedy provided 2 If that doesn t work see Unit Level Troubleshooting on page 24 3 2 Error Processing Fatal errors Cause Blown bulb illumination is low Carriage does not return to home position Other Scanner malfunction Process Lamp turns off and operation stops A status Bit 7 is set Display LED lights red Reset After removing the cause of the error Turn the power back on Disconnect and then r...

Page 24: ...the Unit Level Troubleshooting section Acceptable commands ESC F ESC f ESC 3 4 Unit Level Troubleshooting Refer to one of these sections to solve scanner problems Scanner Doesn t Initialize on page 25 Carriage Doesn t Move on page 25 Carriage Operates But an Error Occurs on page 25 Lamp Does Not Come On on page 25 Image Isn t Scanned Clearly on page 25 Scanner Doesn t Receive Data From Computer on...

Page 25: ...ective 4 If you can t find any other problems replace the main board CARRIAGE OPERATES BUT AN ERROR OCCURS If the carriage operates but the scanner detects an error 1 If the upper case has been removed reinstall it 2 If the error still occurs replace the main board LAMP DOES NOT COME ON If the fluorescent lamp doesn t come on check the following 1 Check all connections to make sure they re secure ...

Page 26: ...talled correctly Try removing it through the Add Remove Programs icon in the Windows Control Panel then reinstall it 3 The USB cable may be defective Try replacing it 4 If all other possibilites are eliminated try replacing the main board OPTIONAL TPU DOESN T OPERATE If the optional TPU doesn t operate check the following 1 Make sure CN6 is properly connected to the main board 2 Check to see if th...

Page 27: ...C H A P T E R 4 DISASSEMBLY ASSEMBLY ...

Page 28: ......

Page 29: ... following tools when servicing the scanner DANGER Unplug the scanner from the AC power outlet before servicing Wear gloves and use an anti static device such as a wrist strap when servicing the scanner C A U T I O N Perform servicing only on flat stable surfaces Use only the specified tools when servicing the scanner Table 4 1 Tool List Description Availablity Phillips Screwdrivers No 1 and No 2 ...

Page 30: ... 1 Carriage Lock Release 1 Disconnect the power cable from the scanner 2 Make sure the carriage lock at the rear of the scanner is in the released position Figure 4 2 Carriage Lock Position Table 4 2 Screw Name Abbreviations Abbreviation Screw Name CBP P type cross head binding screw CBB B type cross head binding screw Table 4 3 List of Screw Types No Specification Shape 1 CBP M3x8 2 CBB M2 5x12 L...

Page 31: ...described in Carriage Lock Release on page 30 1 Remove two screws CBP M3x8 from the rear of the scanner 2 Disengage the six hooks at the left and right of the cover use a flat tipped screwdriver or similar tool to work the cover upward then lift the back of the upper cover and push it forward to remove it Figure 4 5 Upper Cover Removal Remove Rear Screws Document Cover C A U T I O N When removing ...

Page 32: ...d in Document Cover on page 31 Release the carriage as described in Carriage Lock Release on page 30 1 Remove one screw CBB M2 5x12 and then remove the driven pulley to loosen the timing belt 2 Remove the CR Shaft from the holder 3 Remove the timing belt from the carriage assembly 4 Disconnect the white ribbon cable from the main circuit board Figure 4 8 Carriage Assembly Removal 1 Hooks CBB M2 5x...

Page 33: ...When attaching the timing belt to the carriage assembly Loctite screw lock should be used Figure 4 11 Remove FFC from Main Circuit Board Loctite Screw lock C A U T I O N When applying the Loctite screw lock turn the carriage assembly upside down so that the Loctite screw lock does not get onto any other parts FFC R E A S S E M B L Y ...

Page 34: ...y Removal on page 32 1 Remove two screws CBP M3x8 securing the main board shield plate and then remove the main circuit board shield plate 2 Remove three screws CBP M3x8 securing the CR motor unit 3 Disconnect the CR motor unit cable from the main circuit board connector CN5 and then remove the CR motor unit Figure 4 12 Main Circuit Board Shield Plate Removal Figure 4 13 Motor CR Unit Removal 4 Re...

Page 35: ...escribed in Carriage Lock Release on page 30 1 Gently slide the carriage assembly forward until the main circuit board shield plate can be seen 2 Remove two screws CBP M3x8 securing the main circuit board shield plate and then remove it 3 Disconnect the cables from the CR motor connector CN5 carriage ribbon cable connector CN4 and control panel connector CN3 4 Remove the main circuit board Figure ...

Page 36: ...e document cover as described in Document Cover on page 31 Remove the upper cover as described in Upper Cover Removal on page 31 1 Disconnect the cable from CN1 disengage the two hooks and then remove the control panel board Figure 4 18 Control Panel Board Removal CarriageCable Connector CR Motor Connector Control Panel Connector Hooks Control Panel Board ...

Page 37: ...EPSON Perfection 1250 1250 PHOTO Disassembly and Assembly 37 Figure 4 19 Control Panel Board Removal Connector Control Panel Board ...

Page 38: ...EPSON Perfection 1250 1250 PHOTO Disassembly and Assembly 38 ...

Page 39: ...C H A P T E R 5 MAINTENANCE ...

Page 40: ......

Page 41: ... or it begins making abnormal noise Refer to the following tables for recommended grease type and application points Table 5 1 Recommended Grease Table 5 2 Lubrication Points Figure 5 1 Lubrication Point C A U T I O N Never use organic solvents such as thinner or benzene to clean the scanner Grease Type Contents Part Number Availability G 26 40g B702600001 EPSON product not commerically available ...

Page 42: ...EPSON Perfection 1250 1250 PHOTO Maintenance 42 Figure 5 2 Lubrication Point Figure 5 3 Lubrication Point Tensioning Pully Shaft CR Shaft ...

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

Page 44: ......

Page 45: ...Scanning speed Black White Approx 12 msec line 256 grayscale Approx 36 msec line Full color Approx 36 msec line A4 1200 dpi high speed scanning not including data transmission time Command level ESC I D2 Size 10 9 W x 17 2 D x 2 6 H 278 W x 438 D x 67 H mm Weight Approx 5 5 pounds 2 5 kg Image processing functions Gamma correction User defined correction table setting Image output data 8 bit or 1 ...

Page 46: ... Scanner electrical characteristics Rated input voltage 15 2 V DC Rated power Operation Approx 18 W Standby Approx 5 W Energy saving mode Approx 10 W Rated input current 1 2 A 15 2 V DC AC adapter electrical characteristics Power supply voltage Rated 100 V AC 10 Rated input current 0 4 A Power supply frequencyRated 50 60 Hz 49 5 60 5 Hz Rated output voltage 15 2 V DC Rated output current 1 2 A Ins...

Page 47: ...ge at 15 kV or less Test conditions Constants 150 Ω 150 pF Voltage 3 15 kV Cycles 120 6 1 5 Operating environment Temperature Operation 41 F 95 F 5 C 35 C Storage 13 F 140 F 25 C 60 C Humidity Operation 10 80 no condensation Storage 10 85 no condensation 6 1 6 Reliability Main unit MCBF carriage oscillation10 000 cycles Main unit light source MTTF 5000 hours TPU Light source MTTF5000 hours 6 1 7 D...

Page 48: ...eptacle Pin Layout Device Max packet size or end point 0 8 bytes Vendor ID 0x04B8 Product ID 0x010F No of connectors 1 Configuration Interfaces supported 1 Characteristics Self powering Remote Wake up function not yet supported Bus power consumption 2 mA Interface 0 Alternate setting values None No of end points 3 End point 1 Interrupt IN transfer Max packet size 1 byte End point 2 Bulk In transfe...

Page 49: ...request ESC i Status request ESC F Expansion status request ESC f Scanning start ESC G Pushbutton status request ESC Data form setting Data format setting ESC D i Resolution setting ESC R n1 n2 Scanning area setting ESC A n1 n2 n3 n4 Color setting ESC C i Correction processing Gamma correction setting ESC Z i Gamma correction table setting ESC z i d 256 Auxiliary other Threshold value setting ESC ...

Page 50: ...ary Board Connector Function No of Pins Ref Table Main circuit board CN1 AC input 2 6 3 CN2 USB connector 6 6 4 CN3 Panel circuit board 7 6 5 CN4 CCD circuit board 23 6 6 CN5 CR motor 5 6 7 CN6 TPU 7 6 8 CCD circuit board CN1 Main circuit board 23 6 3 CN2 Inverter circuit board 2 6 9 Inverter circuit board CN1 CCD circuit board 2 6 9 CN2 Lamp 2 6 10 Panel circuit board CN1 Main circuit board 7 6 5...

Page 51: ...ircuit Board CN2 10 HP O 11 15V O 12 PM SW4 O 13 PM SW3 O 14 PM SW2 O 15 PM SW1 O 16 5V O 17 DETECT O 18 OP LED I 19 ERR LED I 20 GND 21 Data I O 22 Data I O 23 TPU I Pin No Signal I O 1 MOTB O 2 MOTA O 3 MOTB O 4 MOTA O 5 15V O Pin No Signal I O Pin No Signal I O 1 15V O 2 TPU_DETECT I 3 NC 4 GND Pin No Signal I O 1 LSV O 2 GND Pin No Signal I O 1 25V O 2 INV GND ...

Page 52: ...EPSON Perfection 1250 1250 PHOTO Appendix 52 6 4 Circuit Diagram The following pages show the circuit diagrams for the scanner s control circuits Main interface Board CCD Board ...

Page 53: ...EPSON Perfection 1250 1250 PHOTO Appendix 53 Figure 6 4 Main interface Board ...

Page 54: ...EPSON Perfection 1250 1250 PHOTO Appendix 54 Figure 6 5 CCD Board ...

Page 55: ... CN4 CONNECTOR D1 SCHOTTKY BARRIER DIODE FLS1 CHOKE COIL IC4 IC Q2 TRANSISTOR Q3 TRANSISTOR Q4 TRANSISTOR 400 POWER CABLE 401 AC ADAPTER 500 SHAFT CR 501 TIMING BELT 502 TORSION SPRING 47 503 PULLEY DRIVE 504 PULLEY DRIVEN 505 SHIELD BASE 506 SHIELD VERTICAL 507 SHIELD BASE BOARD 508 SHIELD REAR 509 SHIELD FRONT 510 HOLDER ASSY MOTOR 511 CR MOTOR 512 CARRIAGE ASSY 01 INDIVIDUAL CARTON BOX FOR AMER...

Page 56: ...agram 1 106 102 100 108 107 509 101 104 504 502 501 507 200 508 510 202 506 103 105 513 503 511 500 512 400 401 505 108 The parts to which no reference number is assigned will not be available as after sale service parts GT 7200U PERFECTION 1250 No 01 Rev 01 10328 201 ...

Page 57: ...ion 1250 1250 PHOTO Appendix 57 03 02 01 The parts to which no reference number is assigned will not be available as after sale service parts GT 7200U PERFECTION 1250 No 02 Rev 01 10328 Figure 6 7 Exploded Diagram 2 ...

Page 58: ...EPSON Perfection 1250 1250 PHOTO Appendix 58 Figure 6 8 Exploded Diagram 3 801 802 800 PERFECTION 1250 PHOTO No 03 Rev 01 10328 ...

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