Epson EPL-5500W 3.1 GENERAL INFORMATION

3.1 GENERAL INFORMATION

This chapter describes disassembly/assembly procedures to use to replace the main assemblies of the

EPL-5500W.

3.1.1 Precautions for Disassembly/Assembly

Follow the precautions below when disassembling/assembling the printer.

❒Disconnect the power cord before disassembling/assembling the printer.

❒Be sure to handle the fusing unit carefully, because the unit remains hot for a while after

the printer stops printing.

❒If it is necessary to plug in the power cord and operate the printer after disassembling it,

please be careful of the following:

1.Keep your hands and clothing well away from operating or rotating parts (such as

rollers, fan motors, etc.).

2.Never touch electric terminals or high-voltage components (such as the charger and the

high-voltage unit).

❒Do not disassemble the photoconductor unit and toner cartridge.

❒If the photoconductor unit is removed from the printer, do not place it in direct sunlight.

❒Do not disassemble the optical unit.

❒Never turn power on if the optical unit is not installed.

❒To prevent damage to ICs from static electricity, do not touch the ICs on the circuit

board or the terminals of peripheral electrical components with your hands.

❒Use only the recommended tools to ensure safe and efficient maintenance work.

Inappropriate tools may damage the machine.

❒Never open the upper unit until the main motor stops completely. Otherwise, the gears

may be damaged.

❒When transporting the printer, remove the photoconductor unit and toner cartridge from

the printer.

❒When transporting the printer a long distance, pack up the printer using the original

packing material.

3.1.2 Tools

Use the tools listed in Table 3-1 for disassembling/assembling the printer and for troubleshooting.

Table 3-1. Tools

Name Commercially Available? Part No.

Philips screwdriver no. 2 Yes B743800200

Regular screwdriver Yes B743000100

Tweezers Yes B641000100

Soldering iron Yes B740200100

Round-nose pliers Yes B740400100

EPL-5500W Service Manual Disassembly and Assembly

Rev. A 3-1

Contents

Main Page NOTICE - i - Copyright 1995 by SEIKO EPSON CORPORATION Nagano, Japan PRECAUTIONS DANGER - ii - WARNING DANGER SAFETY INFORMATION For United States Users; - iii - For Other Countries Users; For Denmark Users; - iv - For Norway Users; Laser Safety Labels For United State For Europe Page PREFACE Page Page Chapter 1 General Description Page Page 1.1 FEATURES Figure 1-1. Exterior View of the EPL-5500W Page 1.2 SPECIFICATIONS 1.2.1 Basic Specifications Table 1-2. Paper Feed Methods Table 1-3. Paper Types Table 1-4. Usability of Special Papers Figure 1-2. Printable Area Printable Area 4.0 mm 4.0 mm 4.0 mm4.0 mm 1.2.2 Electrical Specifications Table 1-5. Electrical Requirements and Ranges 1.2.3 Reliability Specifications 1.2.4 Environmental Conditions for Operation (Including Imaging Cartridge) 1.2.5 Environmental Conditions for Storage and Transportation 1.2.6 Applicable Standards Safety Standards Safety Regulations (Laser Radiation) EMI Others Page 1.3 INTERFACE SPECIFICATIONS 1.3.1 Parallel Interface 1.4 OPERATING INSTRUCTIONS 1.4.1 Control Panel Figure 1-3. Control Panel Indicator Lights 1.4.2 Display of Messages 1.4.2.1 Status Messages Table 1-6. Status Messages 1.4.2.2 Error Messages Table 1-7. Error Messages Table 1-7. Error Messages (Continued) 1.4.3 Printing Resolution Host PC Capability Dependency Table 1-8. Host PC Conditions 1.5 MAIN COMPONENTS Figure 1-4. Main Components 1.5.1 C180 MAIN Board Figure 1-5. C180 MAIN Board Page Page Page Chapter 2 Operating Principles Page 2.1 ENGINE OPERATION Figure 2-1. Main Components 2.1.1 Print Process 2-2 Rev. A Figure 2-2. Print Process Diagram 2.1.1.1 Paper Feeding Figure 2-3. Paper Feeding from the Paper Feed Tray Paper Feeding Tray (Standard Tray) 2.1.1.2 Drum Charge Figure 2-4. Drum Charge 2.1.1.3 Laser Exposure 2.1.1.4 Development Figure 2-5. Laser Exposure Figure 2-6. Development 2.1.1.5 Image Transfer 2-6 Rev. A Lower Fusing Roller Figure 2-7. Image Transfer Thermal Fuse Thermistor Upper Fusing Roller Heater Lamp Paper Figure 2-8. Fusing 2.1.2 Engine Control Rev. A 2-7 Figure 2-9. Engine Controller Connection Diagram 2.1.2.1 Main Motor Functions and Control Figure 2-10. Gear and Roller Positions 2-8 Rev. A M1 Main Motor Board C180 MAIN 2.1.2.3 Fuser Control Figure 2-13. Fuser Control Circuit Figure 2-14. Temperature for Fuser Control Procedure Figure 2-15. Scanner Motor Control Circuit 2.1.2.4 Scanner Motor Control 2.1.2.5 Laser Diode Drive Figure 2-16. Laser Diode Drive Circuit L DATA Figure 2-18. Laser Emission Power Adjustment Timing Forced Laser Diode ON VIDEO Figure 2-19. High-Voltage Supply Block Diagram Figure 2-20 shows theprint process. 2-14 Rev. A Development Figure 2-22 is the end of the print sequence. Figure 2-20. Print Process Figure 2-21. Print Sequence (Start) Figure 2-22. Print Sequence (End) 2.1.2.7 Fan Motor Control Figure 2-23. Power Supply Circuit Block Diagram 2.1.2.8 Power Supply Circuit Function and Safety Protection 2.2 PARALLEL INTERFACE CONTROLLER OPERATION 2.2.1 C180 MAIN Board Operation Figure 2-24. Parallel Interface Controller Section Figure 2-25. C180 MAIN Board Block Diagram Page Chapter 3 Disassembly and Assembly Page 3.1 GENERAL INFORMATION 3.1.1 Precautions for Disassembly/Assembly 3.1.2 Tools Table 3-1. Tools 3.1.3 Small Parts Table 3-2. Abbreviations Used for Screws Table 3-3. Screw Types and Abbreviations 3.1.4 Service Checks after Repair Table 3-4. Checks after Repair 3.2 DISASSEMBLY AND ASSEMBLY 3.2.1 Housing Removal Figure 3-1. Removing the Housing 3.2.1.1 Case Removal Page 3.2.3 Disassembling the Engine 3.2.3.1 Optical Unit Removal Figure 3-4. Removing the Optical Unit Page Page Page Page Page 3.2.3.6 Fusing Unit Removal Figure 3-15. Gear and Spring Position Figure 3-16. Removing the Fusing Guide Plate Page Page 3.2.3.7 Fusing Unit Disassembly Figure 3-21. Removing the Heater Lamp Page Page Page Page Page Page 4.1 ADJUSTMENTS 4.1.1 Print Position Adjustment Figure 4-1. Print Position Adjustment 4.2 mm Leading Edge EPL-5500W Service Manual Adjustments Chapter 5 Troubleshooting List of Tables 5.1 OVERVIEW 5.2 SELF-DIAGNOSTIC FUNCTION AND TOOL Table 5-1. Error Codes 5.3 TROUBLESHOOTING 5.3.1 Troubleshooting of Abnormal Operations Table 5-2. Symptoms and Reference Tables Table 5-3. The Printer Does Not Operate at All Table 5-4. Both LED Lights Do Not Come On Table 5-5. Clear Paper Jam (1) Table 5-6. Clear Paper Jam (2) Table 5-6. Clear Paper Jam (2) (Continued) Table 5-7. Check Toner & Cover Table 5-8. Service Error (1) Table 5-9. Service Error (2) Table 5-10. Service Error (3) Table 5-11. Service Error (4) 5.4.2 Print Quality Anomalies Table 5-12. Print Quality Anomalies Page Table 5-12. Print Quality Anomalies (Continued) Chapter 6 Maintenance Page 6.1 MAINTENANCE 6.1.1 User Maintenance Figure 6-2. Cleaning the Electrode Comb 6.1.1.1 Cleaning Figure 6-1. Position of the Special Tool 6.1.1.2 Replacement of Consumables Maintenance EPL-5500W Service Manual 6.1.2 Service Maintenance 6.1.2.1 Periodic Service Maintenance Table 6-1. Periodic Service Maintenance 6.1.2.2 Cleaning Table 6-2. Cleaning Parts and Procedures Page Appendix A Reference Materials List of Tables A.1 CONNECTOR PIN ASSIGNMENTS Rev. A A-1 Figure A-1. Connector Connections SL2 TH1 Table A-1. Board Connector Summary Main Board (C180 MAIN Board) Power Supply Board (PWB-E Board) High-Voltage Supply Board (PWB-FBoard) A.1.1 Main Board (C180 MAIN Board) Table A-2. CN2 Pin Assignments Table A-3. CN202 Pin Assignments Table A-4. CN203 Pin Assignments Table A-5. CN204 Pin Assignments Table A-6. CN205 Pin Assignments Table A-7. CN206 Pin Assignments Table A-8. CN207 Pin Assignments Table A-9. CN208 Pin Assignments Table A-10. CN209 Pin Assignments Table A-11. CN210 Pin Assignments Table A-12. CN211 Pin Assignments Page Page Page Figure A-3. C180 MAIN Circuit Diagram (2/2) Rev. A A-9 Figure A-4. PWB-E (120 V) Circuit Diagram A-10 Rev. A Figure A-5. PWB-E (220/240 V) Circuit Diagram Rev. A A-11 Page Page EPSON OVERSEAS MARKETING LOCATIONS As of October 1995