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Epson EPL-5500W Service Manual

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EPSON TERMINAL PRINTER
EPL-5500W

SERVICE MANUAL

EPSON
4005668

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Summary of Contents for Epson EPL-5500W

  • Page 1: Service Manual

    EPSON TERMINAL PRINTER EPL-5500W SERVICE MANUAL EPSON 4005668...
  • Page 2 - ii -...
  • Page 3 All efforts have been made to ensure the accuracy of the contents of this manual. However, should any errors be detected, SEIKO EPSON would greatly appreciate being informed of them. The above notwithstanding SEIKO EPSON can assume no responsibility for any errors in this manual or the consequence thereof.
  • Page 4 POWER SUPPLY CABLE MUST BE CONNECTED, USE EXTREME CAUTION IN WORKING ON POWER SUPPLY AND OTHER ELECTRONIC COMPONENTS. WARNING REPAIRS ON EPSON PRODUCT SHOULD BE PERFORMED ONLY BY AN EPSON CERTI- FIED REPAIR TECHNICIAN. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/RATING PLATE.

  • Page 5: Safety Information

    SAFETY INFORMATION This printer is a page printer which operates by means of a laser. There is no possibility of danger from the laser, provided the printer is operated according to the instructions in this manual provided. Since radiation emitted by the laser is completely confined within protective housings, the laser beam cannot escape from the machine during any phase of user operation.
  • Page 6 VAROITUS Laitteen käyttäminen muulla kuin tässä käyttöohjeessa mainitulla tavalla saattaa altis- taa käyttäjän turvallisuusluokan 1 ylittävälle näkymättömälle lasersäteiylle. VARNING Om apparaten används på annat sätt än i denna bruksanvisning specificerats, kan användaren utsättas för osynlig laserstrålning, som överskrider gränsen för laser klass For Finland, Sweden Service People VAROITUS Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle laser-säteilylle.
  • Page 7 [Label inside printer] The following laser safety label will be attached inside the printer as shown below. For Denmark, Finland, Sweden, and Norway - v -...
  • Page 8 Includes a step-by-step guide for product disassembly and assembly. CHAPTER 4. ADJUSTMENTS Includes a step-by-step guide for adjustment. CHAPTER 5. TROUBLESHOOTING Provides Epson-approved techniques for adjustment. CHAPTER 6. MAINTENANCE Describes preventive maintenance techniques and lists lubricants and adhesives required to service the equipment. APPENDIX Describes connector pin assignments, circuit diagrams, circuit board component layout and exploded diagram.
  • Page 9 REVISION SHEET Revision Issue Date Revision Page Rev. A November 24, 1995 1st issue - vii -...
  • Page 10 TABLE OF CONTENTS CHAPTER 1. GENERAL DESCRIPTION CHAPTER 2. OPERATING PRINCIPLES CHAPTER 3. DISASSEMBLY AND ASSEMBLY CHAPTER 4. ADJUSTMENTS CHAPTER 5. TROUBLESHOOTING CHAPTER 6. MAINTENANCE APPENDIX - viii -...

  • Page 11: Table Of Contents

    Chapter 1 General Description Table of Contents 1.1 FEATURES 1.2 SPECIFICATIONS 1.2.1 Basic Specification ......... . . 1-3 1.2.2 Electrical Specifications .
  • Page 12 List of Tables Table 1-1. Options for the EPL-5500W ....... . 1-2 Table 1-2.
  • Page 13 Rev. A 1-iii...

  • Page 14: Figure 1-1. Exterior View Of The Epl-5500W

    EPL-5500W Service Manual General Description 1.1 FEATURES The EPSON EPL-5500W laser printer has a 300/600 dots per inch (dpi) resolution and 6 pages per minute ® (ppm) printing speed in a dedicated Microsoft Windows Printing System. It works under Microsoft Windows 3.1x and Windows 95, achieving very high performance due to the recent advances in PC...

  • Page 15: General Description

    General Description EPL-5500W Service Manual Table 1-1 lists the optional units available for the EPL-5500W. Table 1-1. Options for the EPL-5500W Cat. No. Description Note S050005 Developer cartridge Developer and toner cartridge S051029 Photoconductor unit — Rev. A...

  • Page 16: Specifications

    EPL-5500W Service Manual General Description 1.2 SPECIFICATIONS This section provides statistical data for the EPL-5500W. 1.2.1 Basic Specifications Printing method: Laser beam scanning and dry electrophotography Resolution: 600/300 dpi Printing speed: 6 ppm (letter/A4) First printing time (A4/LT): Less than 20 seconds (face-up output)

  • Page 17: Figure 1-2. Printable Area

    General Description EPL-5500W Service Manual Usability of special papers: See Table 1-4. Table 1-4. Usability of Special Papers Input Envelopes Labels Card Stock Letterhead Standard built-in paper tray Manual feed slot R: Reliable feeding and good image quality. P: Possible, but better avoided.

  • Page 18: Electrical Specifications

    EPL-5500W Service Manual General Description 1.2.2 Electrical Specifications Table 1-5. Electrical Requirements and Ranges Description 100 V Version 200 V Version Rated voltage 120 VAC 240 VAC Input voltage range 132 VAC 264 VAC Rated frequency range 60 Hz Input frequency range...

  • Page 19: Applicable Standards

    General Description EPL-5500W Service Manual 1.2.6 Applicable Standards Safety Standards 120 VAC model: UL 1950, CSA 22.2 No. 950 Deviation 3 220/240 VAC model: EN 60950 (IEC950), NEMKO (IEC950), SETI (IEC950), SEMKO (IEC950), DEMKO (IEC950) Safety Regulations (Laser Radiation) 120 VAC model:...

  • Page 20: Software Specifications

    EPL-5500W Service Manual General Description 1.2.9 Software Specifications Built-in modes: Microsoft Windows Printing System PCL4 (software emulation) Rev. A...

  • Page 21: Interface Specifications

    General Description EPL-5500W Service Manual 1.3 INTERFACE SPECIFICATIONS The EPL-5500W is equipped with the following external interfaces: Parallel interface 1.3.1 Parallel Interface The parallel interface has the following two modes: ECP mode Microsoft Peppy mode Pin assignments: Fully IEEE-1284 compliant...

  • Page 22: Operating Instructions

    EPL-5500W Service Manual General Description 1.4 OPERATING INSTRUCTIONS This section describes printer functions, including control panel operation and messages. 1.4.1 Control Panel The printer control panel gives you easy control over most common printer operations. The panel consists of the indicator lights described below.

  • Page 23: Display Of Messages

    General Description EPL-5500W Service Manual 1.4.2 Display of Messages This printer indicates two types of messages with the status message window for the printer driver on the PC. 1.4.2.1 Status Messages This section describes the status messages. Table 1-6. Status Messages...

  • Page 24: Printing Resolution Host Pc Capability Dependency

    EPL-5500W Service Manual General Description Table 1-7. Error Messages (Continued) Message Status Measures Printer is cover open or no Check the cover and toner Check Toner & Cover toner cartridge is installed. cartridge. Paper in the tray to be fed into...

  • Page 25: Main Components

    General Description EPL-5500W Service Manual 1.5 MAIN COMPONENTS To simplify maintenance and repair, the main components of the EPL-5500W have been designed for easy removal and replacement. The main components are: C180 MAIN Board Main board PWB-E Board Power supply circuit board...

  • Page 26: C180 Main Board

    EPL-5500W Service Manual General Description 1.5.1 C180 MAIN Board The C180 MAIN board contains a parallel interface controller and engine controller board. The primary functions of this board are receiving print data from the host and sending the print image to the engine controller via the video interface.

  • Page 27: Pwb-E Board

    General Description EPL-5500W Service Manual 1.5.2 PWB-E Board The PWB-E is the power supply board, which consists of a switching regulator circuit. It converts the AC line voltage into +24 V and +5 VDC voltages. There are two types of power supply board, the 100/120 V type and 220/240 V type.

  • Page 28: Optical Unit

    EPL-5500W Service Manual General Description 1.5.4 Optical Unit The optical unit consists of the laser diode (semi-conductor laser), the mirror motor (scanner motor) which drives the polygon mirror for laser scanning, and several mirrors and lenses. The laser beam generated by the laser diode is conducted to the OPC drum surface by way of the polygon mirror, as well as several mirrors and lenses, to create a latent electro-photographic image on the drum.

  • Page 29: Photoconductor Unit

    General Description EPL-5500W Service Manual 1.5.6 Photoconductor Unit Core mechanisms of the printing process, such as charging and imaging, are integrated into this unit. Figure 1-10. Photoconductor Unit 1.5.7 Developing Cartridge The developing mechanism for the printing process is integrated into this cartridge.

  • Page 30: Table Of Contents

    Chapter 2 Operating Principles Table of Contents 2.1 ENGINE OPERATION 2.1.1 Print Process ..........2-2 2.1.1.1 Paper Feeding .

  • Page 31: List Of Tables

    List of Tables Table 2-1. Functions of C180 MAIN Board Main Elements ....2-18...

  • Page 32: Engine Operation

    EPL-5500W Service Manual Operating Principles 2.1 ENGINE OPERATION This section describes the functions and operating principles of the EPL-5500W engine. Figure 2-1 shows the locations and names of the main engine components. Figure 2-1. Main Components Fan Motor (M3) 11. Paper Feeding Tray Lower Fusing Roller 12.

  • Page 33: Print Process

    Operating Principles EPL-5500W Service Manual 2.1.1 Print Process This section describes the print process from paper feeding to paper exit. Figure 2-2 shows a diagram of the print process. Optical Unit Print Exit Fusing Exposure Drum Cartridge Drum Charge Toner...

  • Page 34: Paper Feeding

    EPL-5500W Service Manual Operating Principles 2.1.1.1 Paper Feeding Paper can be fed into the printer from the paper feed tray (150 sheets) or from the manual feed slot (1 sheet at a time). Paper fed by the paper take-up roller is transported to the transport roller, pre-image transfer roller, and then exit roller.

  • Page 35: Drum Charge

    Operating Principles EPL-5500W Service Manual 2.1.1.2 Drum Charge The PC drum is charged with static electricity before laser exposure. The rotating charge brush and pre-film are used as the charging method. Less ozone is generated by the corona charge of the rotating charge brush and the pre-film, and the PC drum can be charged with low voltage because the charge is directly applied to the PC drum.

  • Page 36: Laser Exposure

    EPL-5500W Service Manual Operating Principles 2.1.1.3 Laser Exposure The laser beam, emitted from the optical unit, makes an invisible static image. The SOS (start of scan) sensor, installed on the laser diode control board (PWB-D), unifies the laser emission timing for each scan line.

  • Page 37: Image Transfer

    Operating Principles EPL-5500W Service Manual 2.1.1.5 Image Transfer The electrode comb is an image transfer system that transfers the toner image on the PC drum onto the paper. Image Transfer Unit Housing Housing Electrode Comb Pre-Image Transfer Roller C180 MAIN...

  • Page 38: Engine Control

    EPL-5500W Service Manual Operating Principles 2.1.2 Engine Control This section describes engine control, the power supply board, and the high-voltage supply board. The engine is controlled by the main board (C180 MAIN board). Figure 2-9 shows the engine controller connection diagram.

  • Page 39: Main Motor Functions And Control

    Operating Principles EPL-5500W Service Manual 2.1.2.1 Main Motor Functions and Control The M1 main motor transmits the drive to the printer rollers and the optional second paper feed unit (lower cassette) via each gear, as shown below. Toner Cartridge Sleeve Roller...

  • Page 40: Paper Take-Up Sensor And Paper Exit Sensor

    EPL-5500W Service Manual Operating Principles Figure 2-11 shows the main motor drive circuit. The M1 main motor is a four-phase stepping motor, controlled by the CPU (IC201) on the main board (C180 MAIN). This board has a stepping motor driver IC that drives the M1 main motor with a constant current.

  • Page 41: Fuser Control

    Operating Principles EPL-5500W Service Manual 2.1.2.3 Fuser Control The heater lamp, powered by AC voltage, heats the fuser. When the power supply board receives a FUSER signal from the main board (C180 MAIN), the power supply board (PWB-E) supplies the AC voltage to the heater lamp.

  • Page 42: Scanner Mirror Motor Control

    EPL-5500W Service Manual Operating Principles If any of the following conditions are detected, the printer indicates a fuser error: If the thermistor detects the temperature has not risen by 20º C for 50 msec. within 12 to 30 sec. after warm up. (This error applies only when the thermistor detects a temperature of 90º C (194º F) or less.)

  • Page 43: Laser Diode Drive

    Operating Principles EPL-5500W Service Manual 2.1.2.5 Laser Diode Drive Figure 2-16 shows the laser diode drive circuit. Laser diode emission is controlled by three signals (LDATA, LDAPC1, and LDAPC2) from the main board (C180 MAIN). Laser Diode SSCAN LD_CTL SOS Mirror...

  • Page 44: Bias Voltages And Laser Drive Timing

    EPL-5500W Service Manual Operating Principles 2.1.2.6 Bias Voltages and Laser Drive Timing Figure 2-19 is a diagram of the drum charge bias voltage, image transfer bias voltage, and the developing bias voltage control circuit. These bias voltages are generated from the +24 VDC from the high-voltage supply board (PWB-F).

  • Page 45: Figure 2-20. Print Process

    Operating Principles EPL-5500W Service Manual Figure 2-20 shows the print process. Brush Roller Charging Laser Exposure PC Drum Development Image Transfer Figure 2-20. Print Process Figure 2-21 shows the start print sequence. The printer’s engine starts printing when it receives the PRINT signal from the video controller circuit.

  • Page 46: Fan Motor Control

    EPL-5500W Service Manual Operating Principles 2.1.2.7 Fan Motor Control The fan motor (M3) rotates at engine initialization, and stops after 2 sec. The fan motor also rotates during printing. When printing ends, the fan motor stops after 3 min. If the following condition is detected, the printer indicates a laser error: The voltage equivalent to the motor current of the fan motor remains 160 mV or lower for 2 sec.

  • Page 47: Parallel Interface Controller Operation

    Operating Principles EPL-5500W Service Manual 2.2 PARALLEL INTERFACE CONTROLLER OPERATION The parallel interface controller section converts from a bidirectional parallel interface to a video interface. The parallel interface controller section is in the C180 MAIN board. C180 MAIN Board Parallel Interface...
  • Page 48 EPL-5500W Service Manual Operating Principles Table 2-1 lists the functions of the main elements of the video controller section in the C180 MAIN board. Table 2-1. Functions of C180 MAIN Board Main Elements Element Location Function This ASIC contains the following functions: E05B23 ASIC Changing from parallel I/F to video I/F.
  • Page 49 Chapter 3 Disassembly and Assembly Table of Contents 3.1 GENERAL INFORMATION 3.1.1 Precautions for Disassembly/Assembly ......3-1 3.1.2 Tools .
  • Page 50 Figure 3-27. Removing the Upper Fusing Roller ..... . . 3-18 Figure 3-28. Removing the Lower Fusing Roller ..... . . 3-19 Figure 3-29.

  • Page 51: General Information

    EPL-5500W Service Manual Disassembly and Assembly 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.

  • Page 52: Small Parts

    Disassembly and Assembly EPL-5500W Service Manual 3.1.3 Small Parts In the following sections, abbreviations are used for small parts, such as screws and washers. Tables 3-2 and 3-3 list these abbreviations. Table 3-2. Abbreviations Used for Screws Abbreviation Part Name...

  • Page 53: Service Checks After Repair

    EPL-5500W Service Manual Disassembly and Assembly 3.1.4 Service Checks after Repair Check the repaired unit using the following list on completion of servicing. Table 3-4. Checks after Repair Item Location Checkpoint Check Control panel Do all LEDs and buttons function normally?

  • Page 54: Disassembly And Assembly

    Disassembly and Assembly EPL-5500W Service Manual 3.2 DISASSEMBLY AND ASSEMBLY This section describes and illustrates procedures for removing and disassembling components of the EPL-5500W. Cleaning is described in Chapter 6. The assembly procedures are not described, except for special notes where necessary, because assembly can be accomplished by performing disassembly in reverse.

  • Page 55: Removal Of The Controller Section

    EPL-5500W Service Manual Disassembly and Assembly 3.2.2 Removal of the Controller Section The control section is comprised of the controller board (the C180 MAIN board). 3.2.1.1 Main Board (C180 MAIN Board) Removal Turn the printer so that its right side faces you.

  • Page 56: Disassembling The Engine

    Disassembly and Assembly EPL-5500W Service Manual 3.2.3 Disassembling the Engine This section describes disassembling the engine, including the high-voltage unit (PWB-F) and power supply board (PWB-E). 3.2.3.1 Optical Unit Removal Do not touch the optical unit, except during replacement. Do not open the unit under any conditions.

  • Page 57: Figure 3-5. Removing The Image Transfer Unit

    EPL-5500W Service Manual Disassembly and Assembly 3.2.3.2 Image Transfer Unit Removal Open the top cover. Remove harness cover A. (Refer to Section 3.2.3.3.) Remove the 2 screws and holders at both ends of the image transfer unit. Figure 3-5. Removing the Image Transfer Unit - 1 Disconnect the 2 connectors and remove the unit.

  • Page 58: Figure 3-7. Moving The Image Transfer Unit

    Disassembly and Assembly EPL-5500W Service Manual After reinstalling the image transfer unit, check that the unit smoothly moves up and down. Figure 3-7. Moving the Image Transfer Unit Remove the electrode comb. When reinstalling the electrode comb, be careful of the direction of installation. Install the electrode comb so that the comb terminal faces the image transfer roller drive gear.

  • Page 59: Upper Unit Removal

    EPL-5500W Service Manual Disassembly and Assembly 3.2.3.3 Upper Unit Removal Open the upper unit. Remove the right cover and left cover. (Refer to Section 3.2.1.1.) Disconnect connectors CN202, CN208, and CN211 from the C180 MAIN. Remove harness covers A and B, and pull CN1 out from the PWB-E board.

  • Page 60: High-Voltage Supply Board (Pwb-F) Removal

    Disassembly and Assembly EPL-5500W Service Manual 3.2.3.4 High-Voltage Supply Board (PWB-F) Removal Open the top cover. Remove 1 screw from the PWB-F cover. Remove the PWB-F cover. Figure 3-11. Removing the PWB-F Cover Remove the 4 screws from the PWB-F board.

  • Page 61: Power Supply Unit (Pwb-E) Removal

    EPL-5500W Service Manual Disassembly and Assembly 3.2.3.5 Power Supply Unit (PWB-E) Removal Remove the upper unit. (Refer to Section 3.2.3.3.) Remove 6 screws, and remove the PWB-E cover. Figure 3-13. Removing the PWB-E Cover Disconnect connector CN207 from the C180 MAIN board.

  • Page 62: Fusing Unit Removal

    Disassembly and Assembly EPL-5500W Service Manual 3.2.3.6 Fusing Unit Removal Open the top cover. (Refer to Section 3.2.3.3.) Remove the image transfer unit. (Refer to Section 3.2.3.2.) Remove 1 screw, and remove the drive tension section of the fusing unit.
  • Page 63 EPL-5500W Service Manual Disassembly and Assembly Remove the harness cover. Figure 3-17. Removing the Harness Cover Remove the fusing entrance guide. Figure 3-18. Removing the Fusing Entrance Guide Rev. A 3-13...

  • Page 64: Figure 3-19. Removing The Fusing Unit

    Disassembly and Assembly EPL-5500W Service Manual 10. Remove 4 screws, and remove the fusing unit. Figure 3-19. Removing the Fusing Unit After reinstalling the fusing unit, check the direction of the bushings on the paper exit roller and the connection between the roller and the ground plate.

  • Page 65: Fusing Unit Disassembly

    EPL-5500W Service Manual Disassembly and Assembly 3.2.3.7 Fusing Unit Disassembly This section describes how to remove the paper exit sensor, heater lamp, lower fusing roller, and upper fusing roller. Heater Lamp Do not touch the glass surface of the lamp with your bare hands.

  • Page 66: Figure 3-22. Removing The Thermistor

    Disassembly and Assembly EPL-5500W Service Manual Thermistor Remove the fusing unit. (Refer to Section 3.2.3.6.) Remove the 1 screw, and remove the thermistor. Figure 3-22. Removing the Thermistor When reinstalling the thermistor, wire the harness as shown below. Figure 3-23. Wiring 3-16 Rev.

  • Page 67: Figure 3-25. Paper Exit Sensor

    EPL-5500W Service Manual Disassembly and Assembly Paper Separator Remove the fusing unit. (Refer to Section 3.2.3.6.) Release the lock of the holder, and remove the 3 paper separators. Figure 3-24. Removing the Paper Separators When reinstalling the paper separators, be careful of their positions, because the middle one differs from the others.

  • Page 68: Figure 3-26. Removing The G-Rings

    Disassembly and Assembly EPL-5500W Service Manual Fusing Roller Remove the fusing unit. (Refer to Section 3.2.3.6.) Remove the 2 G-rings from the fusing unit. Figure 3-26. Removing the G-Rings When reinstalling the G-rings: Be careful of the direction. Securely position them into the grooves of the fusing roller.

  • Page 69: Figure 3-28. Removing The Lower Fusing Roller

    EPL-5500W Service Manual Disassembly and Assembly Take out the lower fusing roller. Figure 3-28. Removing the Lower Fusing Roller Thermal Fuse Remove the fusing unit. (Refer to Section 3.2.3.6.) Remove 2 screws, and remove the thermal fuse. Figure 3-29. Removing the Thermal Fuse Rev.

  • Page 70: List Of Figures

    Chapter 4 Adjustment Table of Contents 4.1 ADJUSTMENT 4.1.1 Print Position Adjustment ........4-1 List of Figures Figure 4-1.
  • Page 71 4-ii Rev. A...

  • Page 72: Print Position Adjustment

    EPL-5500W Service Manual Adjustments 4.1 ADJUSTMENTS This section describes the adjustment procedures for the EPL-5500W. You must perform these adjustments after servicing the printer, especially when any component or part is replaced. 4.1.1 Print Position Adjustment You can adjust the vertical print position on a sheet of paper by turning the image synchronizing volume control on the main board (C180 MAIN).
  • Page 73 Chapter 5 Troubleshooting Table of Contents 5.1 OVERVIEW 5.2 SELF-DIAGNOSTIC FUNCTION AND TOOL 5.3 TROUBLESHOOTING 5.3.1 Troubleshooting of Abnormal Operation ......5-3 5.3.2 Print Quality Anomaly .
  • Page 74 EPL-5500W Service Manual Troubleshooting 5.1 OVERVIEW The EPL-5500W has a sophisticated, built-in, self-diagnostic function that reduces troubleshooting time by identifying failed parts or components. This self-diagnostic test identifies the troubleshooting problems for page printers, in which even a trivial failure can result in a serious print quality problem.
  • Page 75 Troubleshooting EPL-5500W Service Manual Table 5-1. Error Codes Error Code Error Condition 0x02 Fan motor error 0x10 Scanner mirror motor error 0x13 Scanner mirror motor and fan motor error 0x20 Laser light error 0x23 Laser light and fan motor error...

  • Page 76: Troubleshooting

    EPL-5500W Service Manual Troubleshooting 5.3 TROUBLESHOOTING This section describes troubleshooting abnormal operations and print quality problems. 5.3.1 Troubleshooting of Abnormal Operations This section describes how to detect malfunctions, and determine their cause, and it suggests what actions to take for various types of malfunctions. Each paragraph refers you to a detailed troubleshooting table.
  • Page 77 Troubleshooting EPL-5500W Service Manual Table 5-3. The Printer Does Not Operate at All Cause Step Checkpoint Finding Solution Connector CN207 on the Is connector CN207 on the Connect CN207 C180 MAIN board may be C180 MAIN board on the board.
  • Page 78 EPL-5500W Service Manual Troubleshooting Table 5-6. Clear Paper Jam (2) Cause Step Checkpoint Finding Solution Disconnect CN203 on the C180 MAIN board, and check the coil resistance between pins 5 and 6 on the Replace the paper disconnected cable side of the take-up solenoid.
  • Page 79 Troubleshooting EPL-5500W Service Manual Table 5-6. Clear Paper Jam (2) (Continued) Cause Step Checkpoint Finding Solution Paper take-up sensor flag Is the paper take-up sensor Reseat the paper position may be incorrect. flag position incorrect? take-up sensor flag. Paper take-up roller may Replace the paper —...
  • Page 80 EPL-5500W Service Manual Troubleshooting Table 5-9. Service Error (2) Cause Step Checkpoint Finding Solution Connector CN211 on the Is CN211 on the C180 MAIN C180 MAIN board may be Connect it. board disconnected? disconnected. The fan motor may be bad.
  • Page 81 Troubleshooting EPL-5500W Service Manual 5.4.2 Print Quality Anomalies This section describes how to isolate possible causes of a print quality problem. Table 5-12. Print Quality Anomalies Symptom Possible Cause Part Name Check Item Remedy Poor Replace the PWB-F Low image density PWB-F board —...
  • Page 82 EPL-5500W Service Manual Troubleshooting Table 5-12. Print Quality Anomalies (Continued) Symptom Possible Cause Part Name Check Item Remedy Blank print Check whether the Imaging Reinstall the toner toner cartridge is cartridge cartridge. Poor installed properly. development Replace the PWB-F PWB-F board —...
  • Page 83 Troubleshooting EPL-5500W Service Manual Table 5-12. Print Quality Anomalies (Continued) Symptom Possible Cause Part Name Check Item Remedy Toner smudges on Improper Replace the PWB-F PWB-F — the back side of the charging board. sheet. Poor Replace the PWB-F PWB-F —...
  • Page 84 Chapter 6 Maintenance Table of Contents 6.1 MAINTENANCE 6.1.1 User Maintenance ......... . . 6-1 6.1.1.1 Cleaning.
  • Page 85 6-ii Rev. A...

  • Page 86: Maintenance

    EPL-5500W Service Manual Maintenance 6.1 MAINTENANCE The EPL-5500W is a page printer that uses an electrophotographic printing method. Unlike most impact or ink-jet printers, the key components in the electrophotographic process are integrated into two expendable units (the photoconductor unit and toner cartridge). Therefore, periodic replacement of them is essential to ensure high-quality output.

  • Page 87: Replacement Of Consumables

    Maintenance EPL-5500W Service Manual 6.1.1.2 Replacement of Consumables This printer uses a consumable photoconductor unit and toner cartridge. The life of photoconductor unit is 20,000 pages and the toner cartridge life is 3,000 pages, when printing on A4- or letter-size pages with a 5% print ratio.

  • Page 88: Service Maintenance

    EPL-5500W Service Manual Maintenance 6.1.2 Service Maintenance This section describes the periodic service maintenance and the cleaning required. 6.1.2.1 Periodic Service Maintenance The following units need service maintenance periodically, because they are subject to functional deterioration as the total number of printed pages increases, resulting in bad print quality.
  • Page 89 Maintenance EPL-5500W Service Manual Rev. A...
  • Page 90 Appendix A Reference Materials Table of Contents A.1 CONNECTOR PIN ASSIGNMENTS A.1.1 Main Board (C180 MAIN-B Board) ......A-3 A.2 CIRCUIT DIAGRAM A.3 CIRCUIT BOARD COMPONENT LAYOUT A-12...
  • Page 91 EPL-5500W Service Manual Appendix A.1 CONNECTOR PIN ASSIGNMENTS Figure A-1 illustrates the interconnection of the primary components. Table A-1 gives the size and a description of each connector. Main Motor CN 20 6 C180 MAIN Board H O S T...
  • Page 92 Appendix EPL-5500W Service Manual Table A-1. Board Connector Summary Connector Description Pins Reference Main Board (C180 MAIN Board) Video interface (not used) 20 pins — Centronics parallel interface 36 pins Table A-2 CN202 Connector for thermistor 2 pins Table A-3...
  • Page 93 EPL-5500W Service Manual Appendix A.1.1 Main Board (C180 MAIN Board) Table A-2. CN2 Pin Assignments Pin No. Signal Name Description STROBE STROBE signal DATA1 Data bit 1 DATA 2 Data bit 2 DATA 3 Data bit 3 DATA 4 Data bit 4...
  • Page 94 Appendix EPL-5500W Service Manual Table A-3. CN202 Pin Assignments Pin No. Signal Name Description — +5 VDC Fuser temperature Table A-4. CN203 Pin Assignments Pin No. Signal Name Description Paper take-up sensor GND1 — Ground Paper take-up sensor — Not connected +24V —...
  • Page 95 EPL-5500W Service Manual Appendix Table A-8. CN207 Pin Assignments Pin No. Signal Name Description +24V — +24 VDC GND2 — Ground GND1 — Ground — +5 VDC FUSER Heater lamp on Table A-9. CN208 Pin Assignments Pin No. Signal Name...
  • Page 96 Appendix EPL-5500W Service Manual Rev. A...
  • Page 97 EPL-5500W Service Manual Appendix A.2 CIRCUIT DIAGRAMS Figure A-2. C180 MAIN Circuit Diagram (1/2) Rev. A...
  • Page 98 Appendix EPL-5500W Service Manual Rev. A...
  • Page 99 EPL-5500W Service Manual Appendix Figure A-3. C180 MAIN Circuit Diagram (2/2) Rev. A...
  • Page 100 Appendix EPL-5500W Service Manual Figure A-4. PWB-E (120 V) Circuit Diagram A-10 Rev. A...
  • Page 101 EPL-5500W Service Manual Appendix Figure A-5. PWB-E (220/240 V) Circuit Diagram Rev. A A-11...
  • Page 102 Appendix EPL-5500W Service Manual A.3 CIRCUIT BOARD COMPONENT LAYOUTS Figure A-6. C180 MAIN Component Layout (Side A) A-12 Rev. A...
  • Page 103 EPL-5500W Service Manual Appendix Figure A-7. C180 MAIN Component Layout (Side B) Rev. A A-13...
  • Page 104 EPSON OVERSEAS MARKETING LOCATIONS EPSON AMERICA, INC EPSON DEUTCHLAND GmBH 20770 Madrona Avenue, Zülipicher Straße 6, 40549 Düsseldorf P.O. Box 2842 Germany Torrance, CA 90509-2842 Phone: 0211-56030 Phone: (800) 922-8911 Fax: 0211-504-7787 Fax: (310) 782-5220 EPSON UK LTD. EPSON FRANCE S.A.
  • Page 105 EPSON Printed in Japan 95.11-.01-S...

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