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Epson EPL-9000 Service Manual

Epson EPL-9000 Service Manual

Epson terminal printer
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EPSON TERMINAL PRINTER

SERVICE MANUAL

EPSON

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Summary of Contents for Epson EPL-9000

  • Page 1: Service Manual

    EPSON TERMINAL PRINTER SERVICE MANUAL EPSON...
  • Page 2 All efforts have been made toensuretheaccuracyof 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 3 THE 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 CERTIFIED REPAIR TECHNICIAN. MAKE CERTAIN THAT THE SOURCE VOLTAGE IS THE SAME AS THE RATED VOLT- AGE, LISTED ON THE NUMBER/RATING PLATE.

  • Page 4: Safety Information

    SAFETY INFORMATION 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 to the instructions in this manual provided. Since radiation emitted by the is completely confined within protective housings, the laser beam cannot escape from the machine during any phase of user operation.
  • Page 5 ADVARSEL Dersom apparatet brukes annen i denne som overskrider grensen for laser Dette er en laser. effeckt er 5 er 780 nm. Safety Labels Laser [Label on rear printer case] A laser safety labels is attached on the outside of the printer shown below. For Europe NACH PRODUCT TO...
  • Page 6 [Label inside printer] The following laser safety label will be attached inside the printer as shown and Norway OPEN OPEN AND INTERLOCKS DE EXPOSURE TOMAM. EMISSION DE ATTENTION RAYON LASER.

  • Page 7: General Description

    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 to service the equipment. APPENDIX Describes connector pin assignments, circuit diagrams, circuit board component layout.
  • Page 8 REVISION SHEET Revision Date Revision Page issue Rev. 5, 1994 . . . - vii -...
  • Page 9 TABLE OF CONTENTS CHAPTER 1. GENERAL DESCRIPTION OPERATING PRINCIPLES CHAPTER 2. DISASSEMBLY AND ASSEMBLY CHAPTER 3. ADJUSTMENTS CHAPTER 4. TROUBLESHOOTING CHAPTER 5. MAINTENANCE CHAPTER 6. APPENDIX...

  • Page 10: Table Of Contents

    Chapter 1 General Description Table of Contents FEATURES 1.2 SPECIFICATIONS 1.2.1 Basic Specifications......... 1-3 Electrical Specifications.
  • Page 11 Table l-5. Electrical Specifications ........between EPSON GU2 and in the HP LaserJet Table 1-6.

  • Page 12: Features

    600 and 300 printing. Optional Level 2 (PostScript compatible) module EPSON Micro Gray Technology which is when using Level 2 mode, refines gray scale printing to be comparable to printing on a printer Small and low-cost optional LocalTalk...
  • Page 13 Service General Description Table 1-1 lists the optional units available for the 1-1. Options for Machine Type Cat. No. Description Supports Level 2 mode X3209* Level 2 Module Level 2 fonts and commands Supports local fonts Local language ROM 8 1 2 4 2 ‘...

  • Page 14: Specifications

    General Description Service Manual 1.2 SPECIFICATIONS This section provides statistical data for the Basic Specifications 1.2.1 Printing method: Laser beam scanning and dry Resolution: 600/300 dpi Printing speed: by cassette feed First printing time: 18.9 seconds (A4 cassette feed) 19.1 seconds (Letter cassette feed) 25.0 seconds cassette feed) Warm-up time:...

  • Page 15: Table 1-3. Paper Types

    “ See Table 1-3. Paper types: Table 1-3. Paper Types 4024 DP paper 20 lb. Regular photocopier paper Normal paper Recycled paper 16 to 24 lb. to 90 Card stock (90 to 135 Labels Special paper Letterhead Transparency sheets Colored See Table Usability of special papers: Table 1-4.

  • Page 16: Electrical Specifications

    General Description Service Manual Printable area (standard paper): See Figure 1-2. Printable Area Figure 1-2. Printable Area The actual printable area depends on the printer mode. Note: Less than 35 (standby) Noise: Less than 48 (operating) 0.05 ppm (typical) Ozone density: No toxicity exists in organic photo conductor toner, Toxicity:...

  • Page 17: Environmental Conditions For Operation (Including Imaging Cartridge)

    Service Manual General 1.2.4 Environmental Conditions for Operation (Including Imaging Cartridge) Temperature: 10 to 32° C (50 to 90° 20 to Humidity: feet) or lower Altitude: Printer should installed on a plane. Levelness: or less (Must not be exposed to direct sunlight.) 1.2.5 Environmental Conditions for Storage and Transportation Temperature: O to 35°...

  • Page 18: Specification For Consumable (Imaging Cartridge)

    General Description Service Manual 1.2.7 Specification for Consumable (Imaging Cartridge) 6,500 pages Life: Note: In continuous printing mode with paper at a image ratio (black/white ratio). The life varies, depending on the printing mode (continuous or intermittent) and/or the image ratio. Environmental for Storage and Transportation Temperature:...

  • Page 19: Software Specifications

    HP LaserJet 4 shows the differences between EPSON mode and the emulation. Table mode in the HP LaserJet 4 emulation. While in EPSON mode, the operator can enter mode without sending the (Enter mode) d.
  • Page 20 Service General Table 1-7. Built-in Fonts (Continued) Applicable Mode Resident Fonts Scalable fonts Roman Dutch 801 Bold Dutch 801 Italic Dutch 801 Bold Italic Humanist 601 Humanist 601 Bold Humanist 601 Italic Bold Italic Humanist 601 Ribbon 131 Clarendon Condensed Bold Swiss 742 Swiss 742...
  • Page 21 Description Symbol Sets Mode (bitmap fonts): sets Roman-8 Roman Extension Italian ANSI ASCII German Legal Spanish Mode 34 symbol Roman-8 Italian ANSI ASCII German 8859-2 1S0 Spanish 8859-9 ..VeMath DeskTop Math-8 PcTk437 windows IBM-US VeUS PiFont symbol Wingdings 2 Mode: 15 International characters and 9 code tables...

  • Page 22: Interface Specifications

    Optional Type B interface 1.3.1 Parallel Interface The parallel interface has two modes as follows: Compatibility mode (same as parallel interface of EPSON’s current page printer) Reverse mode 1.3.1.1 Compatibility Mode of Parallel Interface STROBE synchronization, 8-bit parallel data transfer...
  • Page 23 Service Manual General Description Table 1-8. Parallel Interface Pin Assignments Pin No. Signal Name STROBE is a strobe used to read data from the host computer. The pulse width must be more than 0.5&c. STROBE Normally it is HIGH, and data is latched at the trailing edge of this DATA 1 to 8 are parallel data bits.
  • Page 24 General Description Service Manual Reverse Mode 1.3.1.2 The reverse mode for supports the nibble mode of This printer can run in reverse mode, in which the printer can inform the computer of its status by EJL and PJL commands. nibble System: receptacle Connector type:...
  • Page 25 Service General Description 1-4 shows the parallel interface state switch diagram. Compatibility Mode Forward Data ACK and Transfer IN= LOW No data sent ERR= LOW Sending data AUTO FFFD LOW Request to send data AUTO AUTO FE ED= LOW ERR= LOW Figure 1-4.

  • Page 26: Figure 1-5. Negotiation Timing Chart

    General Description Service Manual Figure 1-5 shows the negotiation timing chart. DATA or 04 h STROBE AUTO-FEED BUSY Peripheral Busy Status Current Peripheral Note 2 ERROR Current Peripheral Idle Compatibility Negotiation HB DNA Transfer (Note 3) Figure 1-5. Negotiation Timing Chart Note 1: The signal is set to HIGH when not sending data.

  • Page 27: Figure 1-8. Interrupt Timing Chart

    Service Description Figure 1-7 shows the te rrnination chart. DATA STROBE Note AUTO-FEED \ Peripheral Busy Status Peripheral Busy BUSY current Peripheral status Note Note Current N o t e Peripheral Status ERROR Termination Compatibility HB DNA, Idle, chart Figure 1-7. Termination Timing Note 1: The signal is HIGH when DNA.

  • Page 28: Serial Interface

    General Description Service Manual 1.3.2 Serial Interface Type: Transfer system: Full duplex Asynchronous start-stop system Synchronization: Start-bit: 1 bit Stop-bit: 1 or 2 bits Data length: 7 or 8 bits Parity: Odd, even, or none Protocol: X-ON/X-OFF (can be combined with control) control (can be combined with X-ON/X-OFF) Transfer speed:...
  • Page 29 ‘ Manual General Description indicates an signal, which is Note 1: ( ) Note 2: ‘US”, states can be selected through Note3: Although the used mode if selected through Note4: SD+, SD-: Serial ASCII data output from the printer. HIGH level; when SD+ voltage is higher than SD-voltage. LOW level;...

  • Page 30: Optional Localtalk Interface

    General Description Service Manual EPL-9000 1.3.3 Optional LocalTalk Interface This printer can use the optional LocalTalk interface module. LocalTalk Type: Signal level: Same as RS-422 signal level X-ON/X-OFF (cannot be combined with control) Protocol: control (cannot be combined with X-ON/X-OFF) Transfer speed: 230.4 K bps...

  • Page 31: Operating Instructions

    “ General Description 1.4 OPERATING INSTRUCTIONS This section describes the functions performed through the control panel, such as test print, hexadecimal dump, and functions. 1.4.1 Control Panel The printer control panel gives you easy control over most common printer operations. The panel consists of a liquid crystal display (LCD), indicator and buttons.
  • Page 32 Service Manual General Description Buttons Line Switches the printer between on-line and off-line mode. While in mode, this button exits mode. Form Feed When the printer is off line and the Form Feed light is lit, pressing this button prints out data in the printer’s memory. Enters directly (short cut) to manual feed;...

  • Page 33: Functions

    “ General Description Functions 1.4.2 function on the printer control allows the user control most of the functions, such as printing test pages, selecting a paper size, and changing the printer’s configuration. Enter mode by pressing the Menu or Table 1-12 shows the options.
  • Page 34 General Description Service Manual Table 1-12. Functions (Continued) Available Options Menu (Changed by? or button) button) (Set by ENTER button) Font Courier, Roman, Orator S, Saris Ser, Prestige, Script Prop Pitch Condensed ON, OFF 0.40 to 1.50 Inch (step 0.05) T-Margin 1 to (Available) LINES Text...
  • Page 35 General Description Table 1-12. Functions (Continued) Available Menu button) button) ENTER button) TRAY SIZE MP TRAY SIZE 64,65, EXE, 64,65, SIZE EXE, 64,65, OPT SIZE* EXE, MANUAL, 1ST, EXT CONFIG MP MODE LOCK MP TRAY TRAY UNLOCK, LOCK UNLOCK, LOCK OPT TRAY* OFF, ON SIZE IGNORE...

  • Page 36: Hexadecimal Dump Mode

    General Description Service Manual EPL-9000 Table 1-12. SelecType Functions (Continued) Available Options Menu (Changed by or button) (Chan button) button) (Set by ENTER — STATUS SHEET TEST LJ4 FONT SAMPLE — FONT SAMPLE — FONT SAMPLE — — FACT SHEET TEST PAGE —...

  • Page 37: Eeprom Format Mode

    Manual “ 1.4.3.3 Factory Service Mode mode is a useful tool for service people. This mode is not available to users. To The factory service enter factory service mode, turn on the printer while hoMing down the On Line, Feed, and Continue buttons until “PRODUCT MENU”...

  • Page 38: Display Ofmessages

    General Description Service Manual 1.4.4 Display of Messages This printer displays three types of messages on the LCD: status messages, error messages, and power on messages. Status Messages 1.4.4.1 LCD panel normally indicates the printer’s status and the software mode. Table 1-14.

  • Page 39: Warning Messages

    ‘ Manual General Description Table 1-15. Error Messages Measures status Message The inserted cartridge is not Remove cartridge and press ILLEGAL CART Continue button. Cartridge was removed while Form Feed Reinstall cartridge and press INSERT CART Continue button. light was on or the printer was on line. Remove and press was inserted while Form Feed...

  • Page 40: Printersharing

    Service Manual General Description Printer Sharing This section describes printer sharing. This printer has two methods of printer sharing, port fixed mode and auto sense mode. These modes are selected by SelecType menu “AUTO SENSE”. Port Fixed Mode 1.4.5.1 When the printer is in port fixed mode, only one interface port is active. Data from other ports is ignored.

  • Page 41: Figure 1-11. Auto Sense Mode

    Service Manual General 1.4.5.2 Mode It is possible to allocate each mode to parallel, serial, L/T, and entire memory will be allocated to the channels that are used. interface that receives the data&twill print first. Mode Assignment mode FX mode Parallel User 1 mode...

  • Page 42: Emulation Mode Switch Functions

    It is able to switch between EPSON Script and other modes as shown in the figure below. Figure 1-13. Intelligent Emulation Switch 1-31 Rev.

  • Page 43: Bi Resolution Improvement Technology

    “ General Description 1.4.7 Resolution Improvement Technology printers have (Bi Resolution Improvement Technology), which is designed to improve print quality at 600 By this method, the dot map data extracted from the image data is reassembled to improve print data. in diagonal lines.

  • Page 44: Optional Memory

    64 MB, including the resident memory. EPSON supplies several types of memory option (SIMM). Other can be purchased from other vendors. Be sure the SIMM meets the requirements listed below.

  • Page 45: Main Components

    “ General Description 1.5 MAIN COMPONENTS To simplify maintenance and repair, the main components of the have been designed for easy removal and replacement. The main components are: Video controller board MAIN board Optional LocalTalk module Control panel Engine controller circuit board board Low-voltage supply unit...
  • Page 46 General Description Service Manual MAIN Board 1.5.1 MAIN board is a video controller board. The primary functions of this board are receiving print data from the host, generating the print image (video), and sending the print image to the engine controller via the video interface. A 32-bit 19.2 MHz RISC CPU MB86930 (location: ICI) is used, and the following memory chips and custom are assigned to the 4 memory space.

  • Page 47: Figure 1-19. Control Panel

    Description 1.5.2 Board LocalTalk Module) I/F board has the LocalTalk interface circuit, which allows this printer to Apple” computers. module is available for a LocalTalk connection. Main Chips (ICI) .-’, Figure 1-78. l/F Board 1.5.3 Control Panel control panel includes a 20 column panel, which provides many functions for the printer (e.g., displaying error messages or printer operation status).
  • Page 48 General Description Service Manual 1.5.4 Board This is the engine controller board. It consists ofanpPD782388-bit CPU (including a MASK ROM) and a gate array. The board controls laser g (the polygon mirror drive motor), image synchronization, laser beam pulse width, and power. (Ul) SMA7029M Figure 1-20.
  • Page 49 Service Manual General Description Board 1.5.6 is the high-voltage supply circuit board. It the development bias, drum charge bias, and image transfer bias. Do not touch VRl, on the board. These volumes are for setting only. VR102 1-22. Board 1.5.7 Unit unit consists of the laser diode (semi-conductor laser), the mirror motor ( scanner motor) and several mirrors and lenses.

  • Page 50: Figure 1-24. Fusing Unit

    General Description Service Manual EPL-9000 1.5.8 Fusing Unit The fusing unit fixes the toner to the paper using heat and pressure. This unit has a heater lamp, thermistor, and thermal fuse. There are two types of fusing units, the 120 V type and the 220/240 V type.
  • Page 51 Chapter 2 Operating Principles Table of Contents 2.1 ENGINE OPERATION 2.1.1 Print Process......Drum Charge.
  • Page 52 List of Figures Figure 2-1. Main Components ........Figure 2-2.

  • Page 53: Engine Operation

    Operating Principles Service Manual 2.1 ENGINE OPERATION This section describes the function and operating principles of the Figure 2-1 shows the location and names of the main components for the engine. 1. Pickup roller 15. Raster output scanner 2. Pickup solenoid 16.

  • Page 54: Print Process

    2.1.1 Print Process This print section describes the process from drum charge to quenching. Figure 2-2 shows the print process steps, and 2-3 shows the print process diagram. 1. Drum Charge 2. Laser Exposure 3. Development 4. Image Transfer 5. Paper Separation 6.

  • Page 55: Drum Charge

    Service Manual Operating Principles EPL-9000 2.1.1.1 Drum Charge Drum charge is the process of charging static electricity to the (Organic Photo Conductor) drum before laser exposure. The charge wire discharge to the drum surface potential of the drum even. The charge screen between the charge wire and the...

  • Page 56: Development

    Service Operating Principles 2.1.1.3 Development The development is the process of creating a toner image drum by applying toner onto the invisible static image. CM (Charge Metal) blade spreads a thin, even coat of toner over the magnet roll. ALso, as toner passes between the CM blade and magnet roll, it becomes negatively charged.

  • Page 57: Paperseparation

    Operating Principles Service Manual 2.1.1.5 Paper Separation After image is transferred onto the paper, the paper is separated from the drum by means of curvature separation. In the curvature separation method, the diameter of the drum is designed to be small enough to separate the paper from the drum easily.

  • Page 58: Drum Cleaning

    Operating Principles 2.1.1.7 Drum Cleaning After the image onto paper, any remaining toner on the drum is scraped off by the cleaning blade and collected in the used toner bottle. Drum Figure 2-10. Cleaning 2.1.1.8 Quenching negative charges on the drum surface need to be After the cleaning process, the re process, the...

  • Page 59: Paper Feed Mechanism

    Operating Principles Service Manual Paper Feed Mechanism 2.1.2 This section describes the paper feed mechanism. This printer engine has two paper feed methods: one is cassette feeding (optional second cassette feeding is the same), and the other one is manual feeding.

  • Page 60: Cassette Feed

    Service Operating Principle 2.1.2.1 Cassette Feed This printer can use three types of paper cassette: universal cassette, A4 universal cassette, and optional envelope cassette. Figure 2-14 shows the paper cassette and feeder assembly. Paper Cassette Actuator Paper Guide Feed Roller pring Turn Roller Feed...
  • Page 61 Operating Principles Service Manual The paper stacked in the paper cassette is pushed by the feed rolls. This causes the top of the paper stack to contact them. The feed solenoid or disconnect the main motor drive to the feed roll assembly.

  • Page 62: Multi-Sheet Inserter Feed (Manual Feed) 2-1O

    Principles 2.1.2.2 Multi-Sheet Inserter Feed (Manual Feed) This printer has a manual feed called (Multi-Sheet Inserter). the pickup solenoid is actuated, the pickup rolls rotate and feed the first page. pickup rolls stop after one rotation. conditions are detected by the sensor, located above the pickup rolls.

  • Page 63: Papertransport

    Operating Service Manual Paper Transport 2.1.2.3 This section describes the paper registration and paper transport. The printer detects paper inserted in the printer engine from the paper cassette or by the sensor. After the sensor detects the paper top edge, the clutch is turned on and the roll is rotated.
  • Page 64 printer uses a contact type image system by Registration section through paper This is transported to drum. drum through paper is vacuumed to trans. chute assembly side by air for chute is so that the chute fan vacuum the paper to trans. chute fan.

  • Page 65: Paper Exit

    Operating Principles Service Manual EPL-9000 2.1.2.4 Paper Exit The paper on which the toner image has been fused is fed to the output tray. The exit sensor is beyond the pressure roll and the heat roll in the paper path. The engine controller (MC PWB) detects by the exit sensor that paper has been delivered.

  • Page 66: Engine Control

    OperatingPrinciples Engine Control 2.1.3 describes engine control, low voltage supply board and high voltage supply This section board engine is controlled by the engine controller board (MC Figure 2-24 shows the engine connecting diagram. BOARD ROS UNIT AC IN MCU PWB BOARD Scanner Motor...

  • Page 67: Main Motorfunctions And Control

    Operating Principles Service Manual 2.1.3.1 Main Motor Functions and Control The power of the main motor drive is used OPC drum drive, developing drive, fusing drive, and paper feeding drive. Figure 2-25 shows the main motor drive circuit. The main motor is a 4 phase stepping motor. This motor is controlled by the CPU on the engine controller board (MC PIJ14 Main Motor...

  • Page 68: Control Circuit

    Service Principles 2.1.3.3 Control is heated by the heater rod. heater rod’s power is AC voltage. The low voltage supply board AC voltage to the heater rod, when the power supply board receives the HEATER ROD ON signal from the engine board (MC This AC voltage is cut by interlock switch, when the front cover is open.

  • Page 69: Scanner Motor Control

    Service Manual Operating Principles If the following conditions are detected, it will be judged that there is a fuser error (LCD displayed “SERVICE REQ. The warming-up period does not end within 150 sec. The thermistor temperature drops to 122 degrees C. The thermistor temperature exceeds 182 degrees C.

  • Page 70: Laserdiode Drive

    Manual Operating Laser Diode Drive 2.1.3.5 Figure 2-30 is a laser diode drive Laser diode emission is by four signals (DATA, from the engine controller board (MC ............... . DATA MO 4 Bead (MCU...
  • Page 71 Service Manual Operating Principles 2.1.3.6 Bias Control This section describes the bias control. A diagram of drum charge bias, image transfer bias, detach bias and developing bias control circuit is shown in Figure 2-31. These bias generate from the +24 on high voltage supply board These bias cut so that +24 is cut, while the interlock switch is off by case open...
  • Page 72 Operating Principles 2.1.3.7 Fan Motor and Fan Motor Control power is on. motor rotates faster fan motor rotates at all after the during printing. When printing ends, the fan motor slows down. ‘l’he high voltage supply board receives FAN CONTROL signals from the engine board (MC during sends CHUTE FAN ON signal to chute fan and FAN...

  • Page 73: Papersize Detection

    Service Manual Operating Principles Paper Size Detection 2.1.3.8 paper size in paper cassette is detected four mechanical switches. The paper size analog signal. Table 2-1 is lists the paper size and paper size switches functions. Table 2-1. Paper Size Detection Paper Size Switch Paper Size Paper Size Signal Level...
  • Page 74 “ Operating 2.1.3.9 Imaging Sensor actuator push to switch and LD switch, while cartridge is set to switch is imaging cartridge sensor. The LD switch is laser power off switch. Laser power is cut off at no imaging cartridge. LD Switch Board Figure 2-33.
  • Page 75 Operating Principles Service Manual VIDEO CONTROLLER OPERATION The video controller section generates the video signals for the received data. The video controller section is separate in the MAIN board and the control panel. Video Controller Section , ------------- ------------------ ... MAIN Board , .
  • Page 76 OperatingPrinciples MAIN board main elements. Table 2-2 lists the functions of the Table 2-2. Functions of MAIN Board Main Elements Location Function The CPU, which operates at 19.2 MHz, manages the video MB86930 RISC controller operation. This contains the functions: Address decoding .
  • Page 77 Service Manual Operating Principles EPL-9000 Print data and commands transmitted from the host computer via parallel, serial, or optional interfaces are read using the interrupt process of the CPU and stored in the DRAM input buffer. Data and commands in the input buffer are processed by the CPU, which then stores the printing bitmap data (image data) in the V (video) -RAM (image buffer) in the DRAM.
  • Page 78 Service 2.2.1.1 Reset Circuit The entire system (the CPU and the external devices) can be initialized if the RESET signal (CPU pin 113) are active This circuit uses an to monitor the supply voltage if a voltage level less than 4.25 V is detected. reset time is approximately 128 ms.
  • Page 79 Service Manual Operating Principles 2.2.1.3 Interrupt Control deterrnines the priority level of the interrupt and outputs it to terminals Then an interrupt is sent to the CPU. When the value is the CPU process is a interrupt process. When the value is the CPU process is a standard process.
  • Page 80 Operating Principles Parallel Interface Circuit 2.2.1.5 Figure 2-41 shows the parallel interface circuit block diagram. Data sent from the host outputs the signal. BUSY signal latched within the by the STROBE resets the automatically to stop the host computer from sending additional data. The CPU BUSY signal after reading the data from the so that the printer is ready to receive more data from...
  • Page 81 35 MAIN Board l/F Board (Option) LocalTalk Data Bus Address RxD+/- Figure 2-44. LocalTalk Circuit 2.2.1.9 Optional This printer supports an EPSON Type-B optional interface, which is controlled by the INH and signals from the 2-29 Rev. A...
  • Page 82 Principles 2.2.1.10 Video Interface maps the into a memory space different from the system memory. The CPU transmits data from the V-RAM the system RAM) to the W using the cell converts the image data in the from parallel to serial, synchronizes it, and then transmits it to the engine controller board.
  • Page 83 Chapter 3 Disassembly and Assembly Table of Contents 3.1 GENERAL INFORMATION 3.1.1 Precautions for Disassembly/Assembly......3.1.2 .
  • Page 84 3.2.5.5 Heater Removal ..”.”””””.” o ” ””..””... 3.2.5.6 Heat Removal ..”..””””.” -. ”..” 3.2.5.7 Thermostat Removal ..””. 3.2.5.8 Exit Sensor Removal ..””.””””””””” 3.2.5.9 Exit Actuator Removal... .” ”. ””. .” ”” s”” 3.2.6 Drive Unit and Optical Unit Removal ......
  • Page 85 Figure 3-42. Removing the Heat Roller......3-26 Figure 3-43. Removing the Thermostat......Figure 3-44.

  • Page 86: General Information

    Service Manual Disassembly and Assembly 3.1 GENERAL INFORMATION This chapter describes the disassembly /assembly procedures to be used for replacing the main assemblies of the 3.1.1 Precautions for Disassembly/Assembly Follow the precautions below when disassembling/assembling the printer. Disconnect the power cord before the printer.

  • Page 87: Small Parts

    Service Manual Disassembly and Assembly 3.1.3 Small Parts In the following sections, abbreviations are used for small parts such as screws and washers. Table 3-2 lists these abbreviations. Table 3-3 lists screw and washer types. Table 3-2. Screw Abbreviations Part Name Abbreviation Cross-recessed Bind head Cross-recessed Bind head B-tite...
  • Page 88 Service Manual Disassembly and Assembly 3.1.4 Service Checks after Repair Check the repaired unit using the list in Table 3-4. Table 3-4. Checks after Repair Item Location Check Point Check Control Do all LCD, and buttons function normally? Heater lamp Does the heater lamp turn on normally? Test print (status sheet, font sample,...

  • Page 89: Service

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

  • Page 90: Leftcoverremoval

    Disassembly and Assembly Service Manual EPL-9000 3.2.1.3 Left Cover Removal 1. Remove the rear cover. (Refer to Section 2. Remove the top cover. (Refer to Section 3. Remove 1 CB screw x 8) securing the left cover, and remove it.

  • Page 91: Electrical Component Removal

    Service Manual Disassembly and 3.2.2 Electrical Component Removal section describes how to remove the cover, MAIN bead, controller board (MCU high voltage supply board (l-lVPS), low voltage supply unit earth plate, and fan unit. 3.2.2.1 Cover Removal 1. Remove the rear cover. (Refer Remove the top cover.
  • Page 92 Manual Disassembly and Assembly Video Controller Board MAIN Board) Removal 3.2.2.2 Remove the rear cover. (Refer to Section 3.2.1.1.) Remove the top cover. (Refer to Section 3.2.1.2.) Remove the left cover. (Refer to Section 3.2.1.3.) Remove the right cover. (Refer to Section 3.2.1.4.) Remove the shield cover.
  • Page 93 Disassembly and 3.2.2.3 Engine Controller Board Removal 1. Remove therearcover. Section 2. Remove thetopcover. (Refer to Section 3. Remove theleftcover. 4. Remove therightcover. (Refer to Section 5. Remove the ELECcover. (Refer to Section connectors from the engine controller board. 7. Remove 5 CBB screws x 6) securing the engine driver board, and remove it.

  • Page 94: Low Voltage Supply Unit Unit) Removal

    Disassembly and Assembly Service Manual 3.2.2.5 Low Voltage Supply Unit Unit) Removal Remove the rear cover. (Refer to Section 3.2.1.1.) Remove the top cover. (Refer to Section 3.2.1.2.) Remove the left cover. (Refer to Section 3.2.1.3.) Remove the right cover. (Refer to Section 3.2.1.4.) Remove the ELEC cover.

  • Page 95: Fan Unit Removal

    Service Disassembly and 3.2.2.6 Earth Plate Removal Remove the rear cover. (Refer to Section 3.2.1.1.) Remove the top cover. Section 3.2.1.2.) Remove the left cover. (Refer to Section 3.2.13.) Remove the right cover. (Refer to Section 3.2.1.4.) Remove the cover. (Refer to Section 3.2.2.1.) from the HVPS board.

  • Page 96: Feeder Assembly Removal And Disassembly

    Disassembly and Assembly Service Manual 3.2.3 Feeder Assembly Removal and Disassembly section describes how to remove and disassemble the feeder assembly. This Feeder Assembly Removal 3.2.3.1 Remove the paper cassette and imaging cartridge. 2. Turn the left cover over. Place the left cover on a cloth, so that it will not be damaged.

  • Page 97: Feed Solenoid Removal

    Service Manual Disassembly and Assembly 3.2.3.2 Feed Solenoid Removal Remove the paper cassette and imaging cartridge. Remove the feeder assembly. (Refer to Section 3.2.3.1.) Remove 2 x 8) securing the feeder tie plate, and remove it. Remove 2 screws x 8) and 2 x 8) securing the feed housing (right), and remove it.

  • Page 98: Feed Roller Assembly Removal

    Disassembly and Assembly Service Manual 3.2.3.4 Feed Roller Assembly Removal Remove the paper cassette and imaging cartridge. 2. Remove the feeder assembly. (Refer 3.2.3.1.) 3. Remove 2 screws x 8) securing the feeder tie plate, and remove it. 4. Remove 2 screws x 8) and 2 screws...
  • Page 99 Disassembly and Assembly Service Turn Roller Removal Remove the paper cassette and imaging cartridge. 2. Remove the feeder assembly. (Refer 3. Remove 2 screws x 8) securing the feeder tie plate, and remove it. screws x 8) securing the housing (right) remove it.

  • Page 100: Size Spring Removal

    Disassembly and Assembly Service Manual FEEDER Board Removal 3.2.3.8 Remove the paper cassette and imaging cartridge. Remove the feeder assembly. (Refer to Section 3.2.3.1.) Remove 2 screws x 8) securing the feeder tie plate, and remove it. Remove 2 screws x 8) and 2 screws x 8) securing the feed housing (right),...

  • Page 101: Link Assembly Removal

    Disassembly andAssemMy 3.2.4 Paper Transportation Section Disassembly This section describes how to disassemble the paper transportation section. 3.2.4.1 Link Assembly Removal 1. Remove thetopcover. (Refer toSection3.2.l.2.) 2. Remove theleftcover. (Refer to Section 3. Pull out the paper cassette about (3.94 inches) towards the front. 4.

  • Page 102: Lower Chute Assembly Removal

    Disassembly and Assembly Service Manual Lower Chute Assembly Removal 3.2.4.3 1. Open the front cover. 2. Remove the roll assembly. (Refer to Section 3.2.4.2.) 3. Remove 4 CBB screws (M3 x 8) securing the lower chute assembly, and remove it. Figure 3-25.

  • Page 103: Front Cover Removal

    Manual Disassembly and Assembly Front Cover Removal 3.2.4.5 Remove the tray. (Refer to Section 324.13.) Remove the rear cover. (Refer to Section 3.2.1.1.) Remove top cover. to Section 3.2.1.2.) Remove the left cover. 3.2.1.3.) Remove the right cover. (Refer to Section 3.2.1.4.) Remove the ELEC cover.

  • Page 104: Retard Pad Removal

    Disassembly and Assembly Service Manual EPL-9000 3.2.4.6 Retard Pad Removal Open the front cover. 2. Remove the retard pad. Figure 3-29. Removing the Retard Pad 3.2.4.7 Trans. Chute Assembly Removal Open the front cover. Remove the BTR assembly. (Refer to Section 3.2.4.4.) Disconnect from the chute fan.

  • Page 105: Pick-Up Roller Assembly Removal

    Service Disassembly and 3.2.4.8 Pick-up Roller Assembly Removal 1. Open the front cover. 2. Remove the (Refer to Section 3 Remove the Securing and remove the 4. Remove both sides of the KL clips securing the pick-up roller, and remove both sides of the bearings.

  • Page 106: Sensor Removal

    Disassembly and Assembly Service Manual 3.2.4.10 Sensor Removal Remove the top cover. (Refer to Section 3.2.1.2.) 2. Remove the left cover. (Refer to Section 3 Remove the (Refer to Section 3.2.4.4.) 4. Remove the trans. chute assembly. (Refer to Section 3.2.4.7.) 5.

  • Page 107: Removing The Control Panel

    Disassembly and 3.2.4.12 Control Panel Removal Remove the top cover. (Refer to Section 3.2.1.2.) Remove the left cover. to Section 3.2.1.3.) Remove the BTR assembly. (Refer to Section 3-2.4.4.) Remove the trans. chute assembly. (Refer to Section 32.4.7.) Remove the link assembly. (Refer to Section 3.2.4.1.) Remove 5 CBB screws x 8) securing the front frame assembly to the front rover.
  • Page 108 Disassembly and Assembly Service Manual Fusing Unit Removal and Disassembly 3.2.5 This section describes how to remove and disassemble the fusing unit. 3.2.5.1 Fusing Unit Removal Remove the top cover. (Refer to Section 3.2.1.2.) 2. Disconnect from the eject sensor. 3 Remove CB screw x 6) securing the fusing unit.

  • Page 109: Exit Chute

    Service Disassembly and 3.2.5.3 Exit Chute Removal 1. Remove the top cover. (Refer to Section 2. Remove the fusing unit. (Refer to Section 3 Remove 2 screws x 8) securing the fusing unit top cover, and remove it. Remove 2 screws securing the exit chute, and remove it. Figure 3-39.
  • Page 110 Disassembly and Assembly Service Manual Heater Removal 3.2.5.5 Never touch the heater with your bare hands Remove the top cover. (Refer to Section 3.2.1.2.) Remove the fusing unit. (Refer to Section 3.2.5.1.) Remove 2 screws x 8) securing the fusing unit top cover, and remove it. Remove the eject chute.
  • Page 111 Service and Assembly Heat Roller Removal 3.2.5.6 Remove the top cover. (Refer to Section 3.2.1.2.) Remove the fusing unit. (Refer to Section 3.2.5.1.) Remove 2 CB screws x 6) securing the inlet chute at the bottom of the fusing unit, and remove the inlet chute.
  • Page 112 Disassembly and Assembly Manual Thermostat Removal 3.2.5.7 Remove the top cover. (Refer to Section 3.2.1.2.) Remove the fusing unit. (Refer to Section 3.2.5.1.) Remove 2 CB screws x 6) securing the inlet chute at the bottom of the fusing unit, and remove the inlet chute.
  • Page 113 Service Manual Disassembly and 3.2.5.8 Exit Sensor Removal 1. Remove cover. (Refer to Section 3.2.1.2.) 2. Remove the fusing unit. (Refer to Section 3. Remove the exit sensor. Figure 344. Removing the Exit Sensor Exit Actuator Removal 3.2.5.9 1. Remove the top cover. (Refer to Section 2.
  • Page 114 Service Manual Disassembly and Assembly Drive Unit and Optical Unit Removal 3.2.6 This section describes how to remove the drive unit and the optical unit. 3.2.6.1 Drive Unit Removal Remove the rear cover. (Refer to Section 2. Remove the top cover. (Refer to Section 3.
  • Page 115 and Assembly 3.2.6.2 SENSOR Board 1. Remove the rear cover. 1.1.) 2. Remove (Refer to Section 3. Remove Section 3.2.13.) 4. Remove the right cover. (Refer to Section Remove the ELECcover. to Section 6. Remove the fusing unit. (Refer to Section 7.
  • Page 116 Service Manual Disassembly and Assembly There are four screws securing the unit cover. you unintentionally remove three of these screws while removing the engine driver board and high voltage unit from the unit, it is possible for reflected light from the to leak and cause damage.
  • Page 117 Service Disassembly and Figure 3-50. Removing the ROS Unit Rev. 3-32...

  • Page 118: Chapter 4 Adjustments

    Chapter 4 Adjustments Adjustment is required in this product.
  • Page 119 Chapter 5 Troubleshooting Table of Contents OVERVIEW SELF-DIAGNOSTIC FUNCTION 5.3 TROUBLESHOOTING 5.3.1 Troubleshooting Abnormal Operations ......5-2 5.3.2 Troubleshooting Print Quality Problems .
  • Page 120 Troubleshooting Service Manual 5.1 OVERVIEW has a sophisticated built-in self-diagnostic function that reduces troubleshooting time by identifying failed components. This self-diagnostic test overcomes the troubleshooting problems for page printers in which even a trivial failure can result in a serious print quality problem.

  • Page 121: Troubleshooting

    Service Manual Troubleshooting 5.3 TROUBLESHOOTING This section describes troubleshooting abnormal operations and print quality problems. 5.3.1 Troubleshooting Abnormal Operations This section describes how to detect malfunctions, determine their cause, and take action, for various types of malfunctions. Each symptom in Table 5-2 refers you to a detailed troubleshooting table later in this chapter.
  • Page 122 Troubleshooting Service Manual Table 5-2. Symptoms and Reference Tables (Continued) Reference Symptom Printer Condition Table SERVICE REQ. Cl 160 The LCD displays SERVICE REQ. Cl 160. 5-30 SERVICE REQ. Cl 170 The LCD displays SERVICE REQ. Cl 170. 5-31 SERVICE REQ. Cl 180 The LCD displays SERVICE REQ.
  • Page 123 Service Manual Troubleshooting Table 5-7. The LCD Displays PAPER OUT (2) Step Checkpoint Finding Solution Cause The paper-empty sensor Is the paper-empty sensor Reset the flag of the standard feeder flag position OK? empty sensor flag. position may be incorrect. The paper-empty sensor Replace the —...
  • Page 124 Troubleshooting Service Manual The LCD Displays FEED JAM (1) (Continued) Table 5-10. Checkpoint Finding Solution Cause Step Disconnect connector on the board and check the coil resistance between: pin and pin 3; pin 1 and pin 5; pin 2 and pin 4; and pin 2 and pin 6 (four points total) on the disconnected cable Replace the main...
  • Page 125 Service Troubleshooting Table 5-11. The LCD Displays FEED JAM (2) Finding Solution Cause Step Checkpoint connector on the FEEDER board and check the coil resistance between pin 1 and pin 2 on the Replace the feed solenoid. side of the connector, using a Is the resistance approximately 120 ohms? The feed solenoid of the...
  • Page 126 Service Manual Troubleshooting EPL-9000 Table 5-11. The LCD Displays FEED JAM (2) (Continued) Cause Step Checkpoint Finding Solution Disconnect connector on the board and check the coil resistance between: pin 1 and pin 3; pin 1 and pin 5; pin 2 and pin 4; and pin 2...
  • Page 127 Troubleshooting Table 5-12. The LCD Displays FEED JAM (3) Solution Finding Step Cause Disconnect connector on the FEEDER board and check the coil resistance between pin Replace the feed 1 and pin 2 on the solenoid. disconnected cable side of the connector, using a Is the resistance 120 ohms?
  • Page 128 Troubleshooting Service Manual The LCD Displays FEED JAM (3) (Continued) Table 5-12. Solution Step Checkpoint Finding Cause Disconnect connector on the board and check the coil resistance between: pin 1 and pin 3; pin 1 and pin 5; pin 2 and pin 4; and pin 2 and pin 6 (four points total) on the disconnected cable Replace the main...
  • Page 129 Troubleshooting Manuel Table 5-14. The LCD Displays PAPER JAM During Paper Feeding cause solution Finding Step Checkpoint roller or Does paper always jam in the Replace the clutch bad. roller area? roller. Does paper always jam in the Replace the roller maybe bad.
  • Page 130 Troubleshooting Service Manual EPL-9000 Table 5-20. The LCD Displays SERVICE REQ. EOO08 Finding Step Checkpoint Cause Solution Replace the board may — — board. be bad. Table 5-21. The LCD Displays SERVICE REQ. EOO14 Finding Solution Step Checkpoint Cause Replace the board —...
  • Page 131 Service Manual Troubleshooting Table 5-27. The LCD Displays SERVICE REQ. Finding Solution step Checkpoint Cause Replace ROM or (ICI 6) on the Is operation OK after on the MAIN board maybe — you replace the ROM? MAIN board. bad. Replace the board MAIN —...
  • Page 132 Troubleshooting Service Table 5-33. The LCD Displays SERVICE REQ. Step Checkpoint Finding Solution Cause The font Replace the font cartridge may — — cartridge. be bad. Replace the MAIN board — — MAIN board. may be bad. Table 5-34. The LCD Displays SERVICE REQ. or CI21O Solution Step...

  • Page 133: Print Quality Problems

    En-= Service Troubleshooting Print Quality Problems 5.3.2 Troubleshooting This section describes how to isolate print quality problems from their possible causes and remedy them, as shown in Table 5-39. Table 5-39. Print Quality Problems Remedy Part Name Check Item Possible Cause Symptom Check to see if the Low image...
  • Page 134 Troubleshooting Service Manual EPL-9000 Table 5-39. Print Quality Problems (Continued) Remedy Cheek Item Part Name Possible Cause Symptom line Window of optical Optical unit Clean the window. — unit is dirty. Poor image Replace the roller. — roller transfer Replace the imaging Imaging cartridge.
  • Page 135 Service Troubleshooting Table 5-39. Print Quality Problems (Continued) Part Name Check Cause Symptom Areas of missing print Poor image roller Replace the — transfer Replace the imaging Imaging — cartridge. cartridge Replace the fusing Dirt on — roller. roller — Paper replace the paper.
  • Page 136 Troubleshooting Service Manual Table 5-39. Print Quality Problems (Continued) Remedy Part Name Check Item Symptom Possible Cause Replace the paper Paper cassette Paper cassette — cassette. may be bad. - - - - - - - Replace the imaging Imaging cartridge Imaging —...
  • Page 137 Maintenance Chapter 6 Table of Contents 6.1 MAINTENANCE 6.1.1 User Maintenance ......... . 6.1.1.1 Cleaning .

  • Page 138: Maintenance

    Service Manual Maintenance 6.1 MAINTENANCE is page printer that uses the printing method. Unlike most impact or ink-jet printers, the key components in the process are integrated into an expendable imaging cartridge. Therefore, periodic replacement of the imaging cartridge is essential to ensure high-quality output.
  • Page 139 Maintenance Service Manual Charge Wire If the printer begins to print black lines, the charge wire as follows: Figure Charge Wire Cleaning (1) 6-2. layer. Locate the three layers in the imaging cartridge and the slots in the middle into the slot as as it will go and each slot in the middle by pushing the tool...

  • Page 140: Imaging Cartridge Replacement

    Service Manual Maintenance 6.1.1.2 Imaging Cartridge Replacement This printer uses the SO51O22 consumable imaging cartridge. The life of this cartridge is 6500 pages when printing on A4 or letter size pages with a print ratio. If your printed images become faint, enter the CONFIG menu and use the TONER function to find out approximately how much toner remains in the imaging cartridge.
  • Page 141 Maintenance Service holding the imaging cartridge, carefully slide the plastic mmer on either side of the 6. While into the grooves, as shown in Figure 6-6. Slide the cartridge gently into the far as it will go. Figure 6-6. Imaging Cartridge Replacement (3) 7.

  • Page 142: Service Maintenance

    Maintenance Service Manual Menu 12. When the paper is ejected, READY appears the display. Press once and then press Menu ALT and together once. TEST MENU appears. 13. Press Item several times until CLEANING appears. 14. Take the same sheet of paper that was printed in Step 11 and insert it into the MSI tray with Continue.
  • Page 143 Appendix Table of Contents CONNECTOR PIN ASSIGNMENTS Video Controller Board MAIN Board) ..... . A-4 Engine Controller Board PWB Board)..... High-Voltage Supply Board Board).
  • Page 144 Appendix Service Manual A.1 CONNECTOR PIN ASSIGNMENTS Figures A-1 and A-2 illustrate the interconnection of the primary components. Table A-1 gives the size and a description of each connector. C135 MAIN Font Serial l/F Cartridge SIMM MCU PWB SIMM Parallel l/F Option l/F Control Panel...
  • Page 145 Service Appendix mol. 1 1 1 Figure A-2. Cable Connections for the Engine Section Rev.

  • Page 146: Figure 1-9. Control Panel

    Service Manual EPL-9000 Table A-1. Board Connector Summary Connector Description Pins Reference Video Controller Board Connector for SIMM 72 pins Table A-2 Connector for SIMM 72 pins Table A-2 HP font cartridge Connector for 50 pins Table A-3 Centronics parallel interface...
  • Page 147 Service Appendix Video Controller Board MAIN Board) Table A-2. CNI, 2 Pin Assignments Description Signal Name Pin No. Ground Data bus bit O Data bus bit 16 Data bus bit 1 Data bus bit 17 Data bus bit 2 Data bus bit 18 Data bus bit 3 Data bus bit 19 —...
  • Page 148 Appendix Service Manual EPL-9000 Table A-2. CNI, 2 Pin Assignments (Continued) Signal Name Description Pin No. Data bus bit 24 Data bus bit 9 Data bus bit 25 Data bus bit 10 Data bus bit 26 Data bus bit 11...
  • Page 149 “ Appendix Table A-3. CN3 Pin Assignments Description Pin No. Signal Address strobe LDSX Lower data strobe — Not connected Font enable Address bus bit 2 bus bit 4 Address bus bit 6 Address bus bit 8 Address bus bit 10 Address bus bit 12 Address bus bit 14 Address bus bit 16...
  • Page 150 Appendix Manual Table A-4. CN5 Pin Assignments Description Pin No. Signal Name +5 VDC Transmitted data READY Ready signal Received data — Not connected Reset signal RESET l/F disabled Request command l/F ready Data read request Wriie enable Read enable Chip select —...
  • Page 151 Appendix A-5. Pin Assignments Description Pin No. Signal Name — — Ground Data bus bit 2 Data bus bit 3 Data bus bit O Data bus bit 1 Data bus bit 6 Data bus bit 7 Data bus bit 4 Data bus bit 5 Data bus bit 10 Data bus bit 11...
  • Page 152 Appendix Service Manual Table A-5. CN6 Pin Assignments (Continued) Description Pin No. Signal Name signal Address bus bit 30 Address bus bit 31 Input ready signal — Not connected Option select 1 — Not connected Read strobe — Not connected MCLK Clock from CPU —...
  • Page 153 Service Appendix Table A-5. Pin Assignments (Continued) Pin No. Signal Name Address bus bit 25 Byte enabfes O — Not connected Bus request Bus grant Bus grant for external device BGAT Bus request for external device Byte enables 2 Byte enables 3 Option ready Interrupt request bus bit O Interrupt request bus bit 1...
  • Page 154 Appendix Service Manual Pin Assignments Table A-7. Description Pin No. Signal Name — Ground Printer ready Paper top Engine status Controller command CBSY — Not connected Video signal CCLK Command clock Pre feed signal PRFD — Not connected Horizontal synchronized signal Ensign ready SBSY Status busy...
  • Page 155 Service Manual Appendix A.1.2 Engine Controller Board (MCU PWB Board) Table A-10. Pin Assignments Description Pin No. Signal Name Heater ON — Ground Voltage drop signal — Ground — for ROS unit — — Ground — Ground — Ground — —...
  • Page 156 Service Manual Table A-13. Pin Assignments Description Signal Name Pin No. — — Main motor phase A Main motor phase B Main motor phase Main motor phase Table A-14. Pin Assignments Description Signal Name Pin No. Not connected FAN C. Fan speed control TR ON Transfer bias on...
  • Page 157 Service Appendix Table A-17. Assignments Description Signal Name Pin No. Ground Imaging cartridge sensor EP CHEK Laser diode power (input) Laser diode power (output) ERASE ON Erase lamp on — Table A-18. Pin Assignments Description Pin No. Signal Name — Ground SOS sensor signal —...
  • Page 158 Appendix Service Manual I I I u w e - Figure A-4. Control Panel Board Circuit Diagram A-17 Rev.
  • Page 159 Service Appendix A.3 CIRCUIT BOARD COMPONENT LAYOUT ‘ 1 9 6 1 - 4 - 7 — — — — — [C36 “3 Figure A-5. C135 MAIN Board Component Layout (Front Side) Rev.
  • Page 160 Appendix Service Manual Figure A-6. C135 MAIN Board Component Layout (Rear Side) Rev.
  • Page 162 EPSON...

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