Chapter Troubleshooting | Epson DFX-8500 specs

CHAPTER 5

TROUBLESHOOTING

5.1 PROBLEM ISOLATION	5-1
5.2 SELF DIAGNOSTIC FUNCTION	5-2
5.3 TROUBLESHOOTING	5-3

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Epson DFX-8500 service manual Chapter Troubleshooting

Contents

DFX-8500 Copyright 1998 by Seiko Epson Corporation Nagano, Japan Precautions Preface Revision Sheet Revision Issued Data Contents Table of Contents Chapter Page DFX-8500 Exterior View Features Code Name Option NLQ SpecificationsPrinting Specification PC866 UKR PC Aptec BrasciiUSA UPC-A UPC-E BRASCII*1 Character tables and type faces Character Table Bitmap Font Paper Feeding Electrical SpecificationEnvironmental Condition Reliability Physical Specifications Safety ApprovalsCE Marking Acoustic Noise Continuous Paper Printable area MR 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 Front Entry Rear Entry Minimum Maximum LabelsForm Labels Width Height Inch Avery Continuous Form Labels Continuous Forms with Labels Perforation Overlapping Multi-part Form 12. Paper Width Overlapping Area 16. Raised Portion at a Perforation Parallel Interface Forward channel Interfaces Signal Level Parameter Minimum Maximum Condition Parallel Interface Reverse channel Optional Interface Serial Interface Prevention Hosts from Data Transfer Time-out Interface Selection Control Panel Operating Instructions Switches Indicators Paper Out Ribbon Beeper *1 Description Errors and Buzzers15. Error/Warning Buzzer Information ESC/P DIP Switch Settings SW1-2 SW1-3 SW1-4 SW1-5 SW1-6 Character table 17. Character Table Setting StandardPC866 UKR Pcaptec 23. 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 Usual operation Functions Current paper No. is not a or b ‰Paper SelectCurrent paper No. is a or b Operation at Power On Built-in Detection Paper Memory Function ‰How to recall memories Initializations Power-on InitializationSoftware Initialization Panel Initialization 24. Main Components Main Component 25. M-3I60 Printer Mechanism 1 M-3I60 Printer Mechanism Main Control Board C204 Main Board Reset ICRAM ADM232L 27. C204 DRV Board 3 C204 DRV Board 5 C204 SUB Board 4 C204 DRV-B Board 30. C204 PSB/PSE Board 6 C204 PSB/PSE Board 31. Housing HousingPage Operating Principles Page ‰Plunger mechanism Printer Mechanism Operation‰Printhead ‰Auto platen gap adjustment mechanism ‰Interlock switch‰Carriage mechanism ‰Ribbon feed mechanism ‰Tractor select mechanism ‰Paper feed mechanism Printhead Mechanism Printhead Mechanism Carriage Mechanism Carriage Mechanism Platen Gap Adjustment Mechanism Platen Gap Adjustment Mechanism Tension Roller and PF Roller Operation Paper Feed Mechanism Pinion Gear 10. Tractor Wire Operation Tractor Wire Operation 11. Ribbon Feed Mechanism Ribbon Feed and Tractor Select Mechanisms 12. Tractor Select Mechanism 13. Plunger Mechanism Plunger Mechanism Power Supply Boards Input Input Voltage Fuse Ratings Power Supply OperationPower Supply Board Output Specification +5V DC Line 14. Power Supply Board Block Diagram Power Supply Overview ‰37V line block ½ ‰General‰37V line block 2/2 ‰Cooling fan ‰Fatal error recovery ‰Control and status signalsPSB/PSE Board Control Signals Logic Function Out*1 ‰Protection circuits Control Circuit Operation Overview Control Circuit 15. Control Circuit Block Diagram Main IC Functions 16. Parallel Interface Data Flow ‰Power On/Off Reset Reset Circuit‰Forced Reset ‰/INIT Signal Reset Sensor Circuits 18. Sensor Circuit Block Diagram Platen Gap encoder sensor DFX-8500 At Super draft printing, + 10 % CR Motor Specifications DescriptionCR Motor Drive Circuit NLQ HD Curve Control ‰Acceleration control ‰PI ControlSpeed 0 SP1 SP1 SP2 SP3 Speed ‰Deceleration controlCurrent speed SP3 PF Motor Drive Circuit PF Motor SpecificationsSpecification Description RF Motor Drive Circuit 10. RF Motor Specifications PG Motor Drive Circuit 11. PG Motor Specifications Plunger Drive Circuit 12. Plunger Specifications Printhead Drive Circuit 27. Printhead Drive Circuit Block Diagram ‰HF temperature feedback operation ‰Printhead high temperature feedback operation Circuit Boards Removal Interlock Switch and Cover Open Sensor Assembly RemovalPage Overview Precautions for Disassembly and Assembly Packing Material Attaching Recommended Tools Type Class Code Reference Tools Dial Gauges Screw Abbreviations Specification for ScrewsAbbreviation Part Name Screw Names and Illustrations Inspection Check List for the Repaired Printer Service Checks After Repair Disassembly and Assembly ROM Replacement ROM Replacement Printhead Kit Printhead and Ribbon Mask Assembly Removal Front side 12. Printhead Removal Adjustment Required Top Cover Removal Housing Removal 17. Left and Right Side Covers Removal Left, Right, and Front Covers Removal and Fuse Replacement 20. Front Cover Removal G h t S i d e -19. Fuse Removal 21. Front Panel Removal Front Panel Unit Removal 22. Upper Case Removal Upper Case Removal Circuit Boards Removal Bottom Panel Assembly Removal 24. Connector and Earth Cable Removal left side 26. Bottom Panel Assembly Removal 27. C204 PSE/PSB Board Removal Cooling Fan and C204 Power Supply Board Unit Removal 28. C204 SUB Board Unit Removal 4.3 C204 SUB Board Unit Removal 29. C204 DRV/DRV-B Boards Removal ½ 4.4 C204 DRV-B and C204 DRV Board Units Removal 31. C204 Main Board Removal 1/4 4.5 C204 Main Board Unit Removal 34.C204 Main Board Removal 4/4 35. Grounding Plate Removal AC Inlet Removal 37. C204 PNL Board Removal 4.7 C204 PNL Board Removal 38. Interlock Switch Assembly Removal Interlock Switch and Cover Open Sensor Assembly Removal Printer Mechanism Removal 41. Connector Removal left side Adjustment Required 45. Fan Removal Fan Removal 46. Ribbon Feed Change Lever Unit Removal 1/2 Ribbon Feed Change Lever Unit Removal 48. Removing Connectors 49. Tractor Select Lever Disassembly Tractor Select Lever Upper and Lower Assembly Disassembly 51. Ribbon Jam Sensor Removal Ribbon Jam Sensor Removal 52. Connector Junction Board Removal 53. PG Sensor and PG Motor Removal PG Sensor and PG Motor Removal 54. Plunger Removal Plunger and Paper Bail Assembly Removal 55. Paper Bail Assembly Removal 1/2 Upper Paper Guide and Top PE Sensor Removal 57. Top PE Sensor Connector Removal 59. Tension Roller Gear Removal Tension Roller Shaft Removal 60. Shaft Holder Removal 62. Platen Removal Platen Removal 64. Lower Paper Guide Left Part Removal Paper Jam Sensor Removal 66. Pull Tractor Sensor removal Pull Tractor Sensor Removal 67. PW Sensor Removal Paper Width PW Sensor Removal 68. Carriage Guide Shaft Gear Removal PG Home Sensor Removal 70. CR Guide Shaft Gear Phase Alignment 71. PG Home Sensor Removal PF Motor Removal 72. Left Side Frame Gear Removal Left Side Frame Gear Removal 73. Tractor Wire Removal Front Tractor Assembly Removal 75. Rear Tractor Assembly Removal Rear Tractor Assembly Removal 76. CR Motor Fan Removal CR Motor Fan Removal 77. CR Motor Removal CR Motor Removal 78. CR Sensor Removal 1/2 CR Carriage Encoder Sensor Removal 80. Belt Pulley Removal Carriage Mechanism Disassembly 82. Rear Carriage Guide Shaft Removal Assembling Point Paper Support Assembly Removal 6.24 3.2.6.21 PF Drive Roller Removal Adjustment Page PG Motor Backlash Adjustment Printer Mechanism Adjustments Carriage Timing Belt Tension Adjustment Carriage Timing Belt Tension Adjustment Tractor Wire Tension Adjustment Front Tractor Wire Spring Tension Adjustment Pull Tractor Sensor Position Adjustment Pull Tractor Sensor Position Adjustment Set Dial Gauge to Dial Gauge Base Carriage Guide Shaft Parallelism Adjustment Black Marker to 0 Position Setting R r ia g e 11. Carriage Guide Shaft Parallelism Adjustment 13. Loosing Hexagonal Screws Platen Angle Adjustment 70 mm Center Position Platen BitA BitB Down AngleAdjustmentMethod 17. Alpha Value Print Platen Gap Motor Value Adjustment Beta Values Write Mode Alpha Value Write Mode Beta Default Value*1 Measurement 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 Error Messages Troubleshooting Information Interlock Switch Assembly Location Bypassing Interlock Switch and Cover Open Sensor Motor, Fan, Plunger, and Printhead Coil Resistance Part Coil Resistance FPC a FPC B FPC C Start Printer does not operate when power is turned on END Carriage operation is abnormal Start DFX-8500 END Printing is normal, but paper feeding is abnormal Panel unit operation is abnormal Start Start 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 C204 MAIN/DRV/DRV-B boards Component Repair 2/7 Symptom Cause Checkpoint Solution DFX-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 Adhesive Application Points Ref. No Ref. Figure Lubrication Points Ref. No Ref. Figure Lubricant Lubrication and Adhesive Diagram DFX-8500 Maintenance Page Appendix Page Figure A-1. Cable Connection Connector PIN Assignments C204 PSB/PSE board C204 DRV BoardC204 DRV-B Board Ftmp HfanbFancom Htmp Table A-9. C204 Main Board Connector CN8 Table A-8. C204 Main Board Connector CN7Table A-10. C204 Main Board Connector CN9 Table A-11. Digital Board Connector CN10 Xready BtxdBrxd Bxrst FAN VP3PLN RFH/R Table A-15. C204 Main Board Connector CN16 Table A-19. C204 PSB/PSE Board Connector CN1 Table A-18. C204 DRV-B Board Connector CN1Table A-20. C204 PSB/PSE Board Connector CN5 GMD Figure A-2. C204 Main Board Exploded Diagram Circuit DiagramsPage 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 Figure A-16. Exploded Diagrams for DFX-8500 Exploded Diagrams Figure 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 Imaging & Information Products Division Epson AMERICA, Inc Epson Deutchland GmBH Epson