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Epson DFX-8500 service manual

Models: DFX-8500

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1.5.4 C204 DRV-B Board	1-41
1.5.5 C204 SUB Board	1-41
1.5.6 C204 PSB/PSE Board	1-42
1.5.7 Control Panel	1-43
1.5.8 Housing	1-43

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Epson DFX-8500 service manual

Contents

DFX-8500 Copyright 1998 by Seiko Epson Corporation Nagano, Japan Precautions Preface Revision Issued Data Contents Revision SheetTable of Contents Chapter Page Features DFX-8500 Exterior ViewOption Code NameNLQ SpecificationsPrinting Specification Brascii PC866 UKR PC AptecUSA UPC-A UPC-ECharacter tables and type faces Character Table Bitmap Font BRASCII*1Electrical Specification Paper FeedingEnvironmental Condition ReliabilitySafety Approvals Physical SpecificationsCE Marking Acoustic NoisePrintable area Continuous PaperMR M C D Y Z General Description Continuous Paper Front Entry Rear Entry Minimum Maximum Paper and MediaContinuous paper Single sheet and multi-part Paper-stapling Height Labels Labels Front Entry Rear Entry Minimum MaximumForm Labels Width Height InchContinuous Forms with Labels Avery Continuous Form LabelsOverlapping Multi-part Form Perforation12. Paper Width Overlapping Area 16. Raised Portion at a Perforation Interfaces Parallel Interface Forward channelSignal Level Parameter Minimum Maximum Condition Parallel Interface Reverse channel Serial Interface Optional InterfaceInterface Selection Prevention Hosts from Data Transfer Time-outOperating Instructions Control PanelSwitches Indicators Paper Out Ribbon Beeper *1 Description Errors and Buzzers15. Error/Warning Buzzer Information DIP Switch Settings ESC/P17. Character Table Setting Standard SW1-2 SW1-3 SW1-4 SW1-5 SW1-6 Character tablePC866 UKR Pcaptec23. Serial I/F Baud Rate Setting SW4-7 SW4-8 Baud rate 21. I/F Selection SW4-3 SW4-4 Mode22. Serial I/F Parity Setting SW4-5 SW4-6 Serial parity Functions Usual operationCurrent paper No. is not a or b ‰Paper SelectCurrent paper No. is a or b Operation at Power On Built-in Detection ‰How to recall memories Paper Memory FunctionPower-on Initialization InitializationsSoftware Initialization Panel InitializationMain Component 24. Main Components1 M-3I60 Printer Mechanism 25. M-3I60 Printer MechanismReset IC Main Control Board C204 Main BoardRAM ADM232L3 C204 DRV Board 27. C204 DRV Board4 C204 DRV-B Board 5 C204 SUB Board6 C204 PSB/PSE Board 30. C204 PSB/PSE BoardHousing 31. HousingPage Operating Principles Page ‰Plunger mechanism Printer Mechanism Operation‰Printhead ‰Interlock switch ‰Auto platen gap adjustment mechanism‰Carriage mechanism ‰Ribbon feed mechanism‰Paper feed mechanism ‰Tractor select mechanismPrinthead Mechanism Printhead MechanismCarriage Mechanism Carriage MechanismPlaten Gap Adjustment Mechanism Platen Gap Adjustment MechanismPaper Feed Mechanism Tension Roller and PF Roller OperationPinion Gear Tractor Wire Operation 10. Tractor Wire OperationRibbon Feed and Tractor Select Mechanisms 11. Ribbon Feed Mechanism12. Tractor Select Mechanism Plunger Mechanism 13. Plunger MechanismPower Supply Operation Power Supply Boards Input Input Voltage Fuse RatingsPower Supply Board Output Specification +5V DC LinePower Supply Overview 14. Power Supply Board Block Diagram‰General ‰37V line block ½‰37V line block 2/2 ‰Cooling fan‰Control and status signals ‰Fatal error recoveryPSB/PSE Board Control Signals Logic Function Out*1 ‰Protection circuitsControl Circuit Control Circuit Operation Overview15. Control Circuit Block Diagram Main IC Functions 16. Parallel Interface Data Flow Reset Circuit ‰Power On/Off Reset‰Forced Reset ‰/INIT Signal Reset18. Sensor Circuit Block Diagram Sensor CircuitsPlaten Gap encoder sensor DFX-8500 At Super draft printing, + 10 % CR Motor Specifications DescriptionCR Motor Drive Circuit Curve Control NLQ HD‰PI Control ‰Acceleration controlSpeed 0 SP1 SP1 SP2SP3 Speed ‰Deceleration controlCurrent speed SP3 PF Motor Drive Circuit PF Motor SpecificationsSpecification Description 10. RF Motor Specifications RF Motor Drive Circuit11. PG Motor Specifications PG Motor Drive Circuit12. Plunger Specifications Plunger Drive Circuit27. Printhead Drive Circuit Block Diagram Printhead Drive Circuit‰Printhead high temperature feedback operation ‰HF temperature feedback operationInterlock Switch and Cover Open Sensor Assembly Removal Circuit Boards RemovalPage Precautions for Disassembly and Assembly OverviewPacking Material Attaching Tools Recommended Tools Type Class Code ReferenceDial Gauges Specification for Screws Screw AbbreviationsAbbreviation Part Name Screw Names and IllustrationsService Checks After Repair Inspection Check List for the Repaired PrinterDisassembly and Assembly ROM Replacement ROM ReplacementPrinthead and Ribbon Mask Assembly Removal Printhead KitFront side 12. Printhead Removal Adjustment Required Housing Removal Top Cover RemovalLeft, Right, and Front Covers Removal and Fuse Replacement 17. Left and Right Side Covers RemovalG h t S i d e -19. Fuse Removal 20. Front Cover RemovalFront Panel Unit Removal 21. Front Panel RemovalUpper Case Removal 22. Upper Case RemovalBottom Panel Assembly Removal Circuit Boards Removal24. Connector and Earth Cable Removal left side 26. Bottom Panel Assembly Removal Cooling Fan and C204 Power Supply Board Unit Removal 27. C204 PSE/PSB Board Removal4.3 C204 SUB Board Unit Removal 28. C204 SUB Board Unit Removal4.4 C204 DRV-B and C204 DRV Board Units Removal 29. C204 DRV/DRV-B Boards Removal ½4.5 C204 Main Board Unit Removal 31. C204 Main Board Removal 1/434.C204 Main Board Removal 4/4 AC Inlet Removal 35. Grounding Plate Removal4.7 C204 PNL Board Removal 37. C204 PNL Board RemovalInterlock Switch and Cover Open Sensor Assembly Removal 38. Interlock Switch Assembly Removal41. Connector Removal left side Printer Mechanism RemovalAdjustment Required Fan Removal 45. Fan RemovalRibbon Feed Change Lever Unit Removal 46. Ribbon Feed Change Lever Unit Removal 1/248. Removing Connectors Tractor Select Lever Upper and Lower Assembly Disassembly 49. Tractor Select Lever DisassemblyRibbon Jam Sensor Removal 51. Ribbon Jam Sensor Removal52. Connector Junction Board Removal PG Sensor and PG Motor Removal 53. PG Sensor and PG Motor RemovalPlunger and Paper Bail Assembly Removal 54. Plunger Removal55. Paper Bail Assembly Removal 1/2 57. Top PE Sensor Connector Removal Upper Paper Guide and Top PE Sensor RemovalTension Roller Shaft Removal 59. Tension Roller Gear Removal60. Shaft Holder Removal Platen Removal 62. Platen RemovalPaper Jam Sensor Removal 64. Lower Paper Guide Left Part RemovalPull Tractor Sensor Removal 66. Pull Tractor Sensor removalPaper Width PW Sensor Removal 67. PW Sensor RemovalPG Home Sensor Removal 68. Carriage Guide Shaft Gear Removal70. CR Guide Shaft Gear Phase Alignment PF Motor Removal 71. PG Home Sensor RemovalLeft Side Frame Gear Removal 72. Left Side Frame Gear RemovalFront Tractor Assembly Removal 73. Tractor Wire RemovalRear Tractor Assembly Removal 75. Rear Tractor Assembly RemovalCR Motor Fan Removal 76. CR Motor Fan RemovalCR Motor Removal 77. CR Motor RemovalCR Carriage Encoder Sensor Removal 78. CR Sensor Removal 1/2Carriage Mechanism Disassembly 80. Belt Pulley Removal82. Rear Carriage Guide Shaft Removal Assembling Point Paper Support Assembly Removal 6.24 3.2.6.21 PF Drive Roller Removal Adjustment Page Printer Mechanism Adjustments PG Motor Backlash AdjustmentCarriage Timing Belt Tension Adjustment Carriage Timing Belt Tension AdjustmentTractor Wire Spring Tension Adjustment Tractor Wire Tension Adjustment FrontPull Tractor Sensor Position Adjustment Pull Tractor Sensor Position AdjustmentCarriage Guide Shaft Parallelism Adjustment Set Dial Gauge to Dial Gauge BaseBlack Marker to 0 Position Setting R r ia g e 11. Carriage Guide Shaft Parallelism Adjustment Platen Angle Adjustment 13. Loosing Hexagonal Screws70 mm Center Position Platen BitA BitB Down AngleAdjustmentMethod Platen Gap Motor Value Adjustment 17. Alpha Value PrintAlpha Value Write Mode Beta Values Write ModeDefault Value*1 BetaMeasurement Seeking and Bi-directional Printing Adjustment A R T A R T Lig h t T im e 23. Bi-d. Adjustment Page Chapter Troubleshooting Page Troubleshooting Information Error MessagesBypassing Interlock Switch and Cover Open Sensor Interlock Switch Assembly LocationCoil Resistance Motor, Fan, Plunger, and Printhead Coil Resistance PartFPC a FPC B FPC C Printer does not operate when power is turned on StartCarriage operation is abnormal ENDStart DFX-8500 END Printing is normal, but paper feeding is abnormal Start Panel unit operation is abnormalStart 1 C204 PSB/PSE Board Repair C204 PSB/PSE Board Main Parts List Location DescriptionCircuit Board Repair DFX-8500 Troubleshooting 2 C204 MAIN/DRV/DRV-B Boards Repair Symptom Cause Checkpoint Solution C204 MAIN/DRV/DRV-B boards Component Repair 2/7DFX-8500 C204 MAIN/DRV/DRV-B boards Component Repair 4/7 DFX-8500 C204 MAIN/DRV/DRV-B boards Component Repair 6/7 DFX-8500 Printer Mechanism Repair DFX-8500 Adjustments DFX-8500 Chapter Maintenence Page Recommended Lubricants Type Name Quantity Availability Preventive MaintenanceLubrication and Adhesive Application Lubrication Points Ref. No Ref. Figure Lubricant Adhesive Application Points Ref. No Ref. FigureLubrication and Adhesive Diagram DFX-8500 Maintenance Page Appendix Page Connector PIN Assignments Figure A-1. Cable ConnectionC204 PSB/PSE board C204 DRV BoardC204 DRV-B Board Hfanb FtmpFancom HtmpTable A-8. C204 Main Board Connector CN7 Table A-9. C204 Main Board Connector CN8Table A-10. C204 Main Board Connector CN9 Table A-11. Digital Board Connector CN10Btxd XreadyBrxd BxrstVP3 FANPLN RFH/RTable A-15. C204 Main Board Connector CN16 Table A-18. C204 DRV-B Board Connector CN1 Table A-19. C204 PSB/PSE Board Connector CN1Table A-20. C204 PSB/PSE Board Connector CN5 GMDCircuit Diagrams Figure A-2. C204 Main Board Exploded DiagramPage Page Page Page Page Component Layout Figure A- 8. C204 Main Board Component Layout Figure A- 9. C204 DRV Board Component Layout Figure A- 11. C204 DRV-B Board Component Layout Figure A- 13. C204 PSB Board Component Layout Figure A- 14. C204 PSE Board Component Layout Connectors on Table A-20. Part List 1/3 Table A-20. Part List 2/3 Table A-20. Part List 3/3 Exploded Diagrams Figure A-16. Exploded Diagrams for DFX-8500Figure A-16. Exploded Diagrams Figure A-17. Exploded Diagrams Figure A-18. Exploded Diagrams Figure A-19. Exploded Diagrams Figure A-20. Exploded Diagrams Figure A-21. Exploded Diagrams Figure A-22. Exploded Diagrams Figure A-23. Packing Material Epson AMERICA, Inc Epson Deutchland GmBH Imaging & Information Products DivisionEpson