Epson Photo750 manual About This Manual

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About This Manual

This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of EPSON Stylus Photo

750.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.

Contents

This manual consists of six chapters and Appendix.

CHAPTER 1. PRODUCT DESCRIPTIONS

Provides a general overview and specifications 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 the troubleshooting.

CHAPTER 4. DISASSEMBLY AND ASSEMBLY

Describes the step-by-step procedures for disassembling and assembling the product.

CHAPTER 5. ADJUSTMENTS

Provides Epson-approved methods for adjustment.

CHAPTER 6. MAINTENANCE

Provides preventive maintenance procedures and the lists of Epson-approved lubricants and adhesives required for servicing the product.

APPENDIX Provides the following additional information for reference:

•Connector pin assignments

•Electric circuit boards components layout

•Exploded diagram

•Electrical circuit boards schematics

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. Be aware of all symbols when they are used, and always read WARNING, CAUTION or NOTE messages.

WA R Indicates an operating or maintenance procedure, practice or condition that, if not strictly observed, could result in injury or loss of life.

C A U T IndicatesO N an operating or maintenance procedure, practice,

or condition that, if not strictly observed, could result in damage to, or destruction of, equipment.

May indicate an operating or maintenance procedure,

C H E

P O I N 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.

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Contents 659,&#0$18$ General Notice Precautions About This Manual Revision Status Table of Contents Maintenance Product Description Overview General Characteristics„ Holds 10 transparency films Raster Graphics Mode General DescriptionPrinting Printing SpeedPaper Feeding Paper Specification„ No curled, wrinkled, scuffing or torn paper be used Paper Left Right Top Bottom Printable AreaWidth Length Margin Typ Min Adjust Lever Settings Setting Position of Adjust LeverPaper Lever position Adjustment Value EnvelopeEnvironmental Conditions Environmental ConditionBlack Ink Cartridge Ink CartridgeColor Ink Cartridge Electric Specification Safety ApprovalsInput Data Buffer ReliabilityPrinter Language and Emulation CE Marking14.1 ESC/P Control Codes „ Dot size control ESC e „ Raster header ESC D „ Raster body Connector pin assignment and signals Parallel InterfaceParallel InterfaceForward channel Parallel I/FPin Signal Return In/Out Function Description Name GND pin Parallel InterfaceReverse channelConnect pin assignment and signals Xflag OutParallel I/F Mode Typical time of tack 10. Typical Time of Tack12. Connector pin assignment and signals Serial Interface11. Serial interface 13. X-ON/X-OFF, DTR protocolPin Signal Name Out Function Description 14. Connector pin assignment and signalsUSBUniversal Serial Bus Interface Interface selection Prevention of data transfer time-out on HostIeee 1284.4 protocol Bi-directional Command SwitchesFunction Control CodeSpecial Setting Mode 18. Special setting modeLED Indications 17. Status printingErrors Indicators19. Printer Status displayed on the control panel Ink Out Paper Out Priority Black Color„ When you need to perform test print after the repair InitializationInitialization Setting Physical Specification20. Consumables Consumables and optionsClassification Name Operating Principles Printer Mechanism Printer MechanismEpson Stylus Photo Revision a 1 C257 PSB Power Supply Circuit Operating Principles of Electric CircuitOutput Voltage Voltage UsageTRANST1 2 C259 Main Control Circuit Major ElementsMajor Elements Location FunctionReset Circuit Reset CircuitSensor Circuit Sensor CircuitEeprom Control Circuit Timer CircuitHead Drive Circuit Paper Feed Pump Motor PF/Pump Motor Drive Circuit Paper Feed Pump Motor Drive CircuitCarriage MotorCR Motor Drive Circuit 10. Carriage Motor Drive CircuitTroubleshooting Check Point Signal Level Switch Mode Sensor Check PointMotor, Coil Resistance Motor Location Check Point ResistanceLED Indication Condition Remedy Error IndicationPaper Ink End Check Black Color Symptoms and Corresponding Flow Chart Unit Level TroubleshootingSymptom Cause Flow Chart E c k t h e Error S s a g e . R e f e r t o T a b le 3 A R T Repair of the Power Supply Board Unit Repair Power Supply BoardSympto Condition Cause Check point Solution Repair of the Control Board Repair of the Control BoardEpson Stylus Photo Revision a Symptom Condition Cause Check Point Solution Unit Repair Printer Mechanism10. Repair of the Printer Mechanism 11. Repair of the Printer Mechanism12. Repair of the Printing Mechanism 13. Repair of the Printing Mechanism14. Repair of the Printer Mechanism 15. Repair of the Printer MechanismDisassembly and Assembly Tools PrecautionsName Supplier Parts No Phillips Screw Driver Check List Work Completion CheckClassifi Check Point Status Cation Disassembly Flowchart below shows step-by step disassembly proceduresHousing Removal Housing RemovalCircuit Boards Removal Shield Plate, M/B RemovalE P O Control Panel Removal Control Panel RemovalAbsorber Tray, AssemblyA Removal Absorber Tray, AssemblyA RemovalPrinter Mechanism Removal Print Head RemovalE „ Be sure that the grounding plate is installed to Print Head InstallationPump, Assembly/Cap, Assembly Removal „ Be careful not to damage the rubber part of the cap11. Ink Tube Motor, Assembly, CR Removal Bi-D adjustment. See Bi-D Adjustment onMotor Assembly PF Removal 15. Motor, Assembly, PF Installation5.5 ASF, Assembly Removal Paper Feed Roller Assembly Removal E „ When removing or installing the HopperRoller Assembly, LD Left/Right Removal 18. Roller Assembly, LD RemovalCarriage Assembly Removal 19. Bush Parallel Adjust Removal20. Carriage Assembly Removal PE Sensor Assembly Removal 21. PE Sensor Assembly RemovalRoller, Assembly, PF Removal 23. Roller, Assembly, Paper Exit Removal24. Roller, Assembly, PF Removal HP Sensor Removal 25. HP Sensor RemovalCartridge SensorSensor, I/C Removal 26. Bush Holder, Sensor, I/C Removal29. Sensor, I/C Removal Adjustment Required Adjustment Required AdjustmentPaper Gap Adjustment Adjustment„ Do not scratch special coated surface of the PF Epson Stylus Photo Revision B Adjustment by Adjustment Program Adjustment ProgramHow to use the Adjustment Program „ You have to go through the menu to inputOptions in the Program and Keys to Use Setting Destination Information Head Voltage ID Adjustment Head Angular Adjustment Screw position for fixing the print headMagnetized condition when the printer has been left Adjustment, the following screen will be appearedU Preventing from the CR motor fall into the non Alone more then 5 minutes in the Head AngulerBi-D Adjustment Bi-D Adjustment Pattern SampleHead Cleaning Initial Ink Charge Counter Value for Ink Absorber Protect Counter ResetProtect Counter Value Maintenance Service Maintenance Cleaning„ Never use chemical solvents, such as thinner, to Lubrication „ Never use oil and the grease other than thoseLubrication Point Type Name Epson Code SupplierASF A R , 2 3 V e r a p p l y t h e o i l Appendix Connector Summary Connector Summary for C259MainConnector CN4 Major Component UnitConnector CN5 Connector CN6Connector CN7 Connector CN8Connector CN10 10. Connector CN11Component Layout C259 Main Component LayoutAppendix Component Layout 101 Exploded Diagram Exploded Diagram-1Exploded Diagram for Epson Stylus Photo 750 2/3 Exploded Diagram for Epson Stylus Photo 750 3/3 Electric Circuit Page Page