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Epson Photo750 manual Epson Stylus Photo Revision a

Models: Photo750

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EPSON Stylus Photo 750

Revision A

Table 3-9. Repair of the Control Board

	Sympto	Condition	Cause	Check point	Solution
	m	Condition	Cause	Check point	Solution
	m

Abnormal printing

IC12 is broken.

Check the signal waveform of DATA(Pin 29) of IC14 and Common NPNB/PNPB(Pin 16/19).

If DATA is not input, replace IC2.

IC14 is broken.

Replace IC14.

Troubleshooting

Repair of the Control Board

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Epson Photo750 manual Epson Stylus Photo Revision a

Contents

659,&#0$18$ General Notice Precautions About This Manual Revision Status Table of Contents Maintenance Product Description General Characteristics Overview„ Holds 10 transparency films Printing Speed Raster Graphics ModeGeneral Description PrintingPaper Specification Paper Feeding„ No curled, wrinkled, scuffing or torn paper be used Printable Area Paper Left Right Top BottomWidth Length Margin Typ Min Envelope Adjust Lever SettingsSetting Position of Adjust Lever Paper Lever position Adjustment ValueEnvironmental Condition Environmental ConditionsInk Cartridge Black Ink CartridgeColor Ink Cartridge Reliability Electric SpecificationSafety Approvals Input Data BufferCE Marking Printer Language and Emulation14.1 ESC/P Control Codes „ Dot size control ESC e „ Raster header ESC D „ Raster body Parallel I/F Connector pin assignment and signalsParallel Interface Parallel InterfaceForward channelParallel InterfaceReverse channel Pin Signal Return In/Out Function Description Name GND pinXflag Out Connect pin assignment and signals10. Typical Time of Tack Parallel I/F Mode Typical time of tack13. X-ON/X-OFF, DTR protocol 12. Connector pin assignment and signalsSerial Interface 11. Serial interface14. Connector pin assignment and signals Pin Signal Name Out Function DescriptionUSBUniversal Serial Bus Interface Prevention of data transfer time-out on Host Interface selectionIeee 1284.4 protocol Control Code Bi-directional CommandSwitches Function17. Status printing Special Setting Mode18. Special setting mode LED IndicationsInk Out Paper Out Priority Black Color ErrorsIndicators 19. Printer Status displayed on the control panelInitialization „ When you need to perform test print after the repairPhysical Specification Initialization SettingConsumables and options 20. ConsumablesClassification Name Operating Principles Printer Mechanism Printer MechanismEpson Stylus Photo Revision a Voltage Usage 1 C257 PSB Power Supply CircuitOperating Principles of Electric Circuit Output VoltageTRANST1 Location Function 2 C259 Main Control CircuitMajor Elements Major ElementsReset Circuit Reset CircuitSensor Circuit Sensor CircuitTimer Circuit Eeprom Control CircuitHead Drive Circuit Paper Feed Pump Motor Drive Circuit Paper Feed Pump Motor PF/Pump Motor Drive Circuit10. Carriage Motor Drive Circuit Carriage MotorCR Motor Drive CircuitTroubleshooting Motor Location Check Point Resistance Check Point Signal Level Switch ModeSensor Check Point Motor, Coil ResistanceError Indication LED Indication Condition RemedyPaper Ink End Check Black Color Unit Level Troubleshooting Symptoms and Corresponding Flow ChartSymptom 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 Unit Repair Power Supply Board Repair of the Power Supply BoardSympto Condition Cause Check point Solution Repair of the Control Board Repair of the Control BoardEpson Stylus Photo Revision a 11. Repair of the Printer Mechanism Symptom Condition Cause Check Point SolutionUnit Repair Printer Mechanism 10. Repair of the Printer Mechanism13. Repair of the Printing Mechanism 12. Repair of the Printing Mechanism15. Repair of the Printer Mechanism 14. Repair of the Printer MechanismDisassembly and Assembly Precautions ToolsName Supplier Parts No Phillips Screw Driver Work Completion Check Check ListClassifi Check Point Status Cation Flowchart below shows step-by step disassembly procedures DisassemblyHousing Removal Housing RemovalShield Plate, M/B Removal Circuit Boards RemovalE P O Control Panel Removal Control Panel RemovalAbsorber Tray, AssemblyA Removal Absorber Tray, AssemblyA RemovalPrint Head Removal Printer Mechanism RemovalPrint Head Installation E „ Be sure that the grounding plate is installed to„ Be careful not to damage the rubber part of the cap Pump, Assembly/Cap, Assembly Removal11. Ink Tube Bi-D adjustment. See Bi-D Adjustment on Motor, Assembly, CR Removal15. Motor, Assembly, PF Installation Motor Assembly PF Removal5.5 ASF, Assembly Removal E „ When removing or installing the Hopper Paper Feed Roller Assembly Removal18. Roller Assembly, LD Removal Roller Assembly, LD Left/Right Removal19. Bush Parallel Adjust Removal Carriage Assembly Removal20. Carriage Assembly Removal 21. PE Sensor Assembly Removal PE Sensor Assembly Removal23. Roller, Assembly, Paper Exit Removal Roller, Assembly, PF Removal24. Roller, Assembly, PF Removal 25. HP Sensor Removal HP Sensor Removal26. Bush Holder, Sensor, I/C Removal Cartridge SensorSensor, I/C Removal29. Sensor, I/C Removal Adjustment Required Adjustment Required AdjustmentAdjustment Paper Gap Adjustment„ Do not scratch special coated surface of the PF Epson Stylus Photo Revision B „ You have to go through the menu to input Adjustment by Adjustment ProgramAdjustment Program How to use the Adjustment ProgramOptions in the Program and Keys to Use Setting Destination Information Head Voltage ID Adjustment Screw position for fixing the print head Head Angular AdjustmentAlone more then 5 minutes in the Head Anguler Magnetized condition when the printer has been leftAdjustment, the following screen will be appeared U Preventing from the CR motor fall into the nonBi-D Adjustment Pattern Sample Bi-D AdjustmentHead Cleaning Initial Ink Charge Protect Counter Reset Counter Value for Ink AbsorberProtect Counter Value Maintenance Cleaning Service Maintenance„ Never use chemical solvents, such as thinner, to Type Name Epson Code Supplier Lubrication„ Never use oil and the grease other than those Lubrication PointASF A R , 2 3 V e r a p p l y t h e o i l Appendix Major Component Unit Connector SummaryConnector Summary for C259Main Connector CN4Connector CN8 Connector CN5Connector CN6 Connector CN710. Connector CN11 Connector CN10C259 Main Component Layout Component LayoutAppendix Component Layout 101 Exploded Diagram-1 Exploded DiagramExploded Diagram for Epson Stylus Photo 750 2/3 Exploded Diagram for Epson Stylus Photo 750 3/3 Electric Circuit Page Page