Epson AcuLaser C8500 Service Manual
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Epson AcuLaser C8500 Service Manual

Epson AcuLaser C8500 Service Manual

Color laser page printer
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Table of Contents

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Download this manual See also: Setup Manual, Quick Reference Manual
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
SERVICE MANUAL
Color Laser Page Printer
EPSON AcuLaser C8500
®
SEPG00-006

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Summary of Contents for Epson AcuLaser C8500

  • Page 1 SERVICE MANUAL SERVICE MANUAL SERVICE MANUAL SERVICE MANUAL Color Laser Page Printer EPSON AcuLaser C8500 ® SEPG00-006...
  • Page 2 SEIKO EPSON CORPORATION. All effort 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.
  • Page 3 2. MAKE CERTAIN THAT THE SOURCE VOLTAGES IS THE SAME AS THE RATED VOLTAGE, LISTED ON THE SERIAL NUMBER/ RATING PLATE. IF THE EPSON PRODUCT HAS A PRIMARY AC RATING DIFFERENT FROM AVAILABLE POWER SOURCE, DO NOT CONNECT IT TO THE POWER SOURCE.

  • Page 4: About This Manual

    About this manual This manual describes basic functions, theory of electrical and mechanical operations, maintenance and repair procedures of the EPSON AcuLaser C8500. The instructions and procedures included herein are intended for the experienced repair technicians, and attention should be given to the precautions on the preceding page.
  • Page 5 Abbreviation ADC = Automatic Density Control FDR = Feeder OPC = Organic Photo Conductor AG = Analog Ground FG = Frame Ground P/H = Paper Handling ASSY = Assembly FRU = Field Replaceable Unit P/R = Pressure Roll AUX. = Auxiliary GND = Ground PCDC = Pixel Count Dispense Control B/W = Black and White...

  • Page 6: Safety Information

    Safety Information To prevent accidents during a maintenance procedure, strictly observe Power Supply the Warnings and Cautions. Do not do anything that is dangerous or not within the scope of this document. Before starting any service procedure, switch off the printer power and Do not do anything that is dangerous even if not specifically described unplug the power cord from the wall outlet.

  • Page 7: Mechanical Components

    Mechanical Components Safety Components If you service a driving assembly (e.g., gears), first turn off the power The printer is equipped with safety components (e.g., interlock and unplug the power cord. Then manually rotate the assembly. switches, fuses, thermostat) and safety switches for protecting users and service personnel from injury and the equipment from damage.
  • Page 8 Exit Chute Switch This switch is a safety switch. This switch is turned off when the Exit Upper Assembly (the cover on the upper left side of the printer) is opened. P/J91 (Connector that connects the Main Harness Assembly and Registration Harness Assembly) This is an interlock connector that cuts off the power supply (24VDC, 5VDC-LD) to the control circuit and related parts.
  • Page 9 Laser Beam NOTE: The laser beam has a narrower frequency band and more coherent phases than any other light (sunlight, electric light). It has excellent monochromaticity and convergence. A thin The printer has two interlock switches: the Front Cover Switch R and laser beam reaches long distances.
  • Page 10 High Temperature Assembly Parts To prevent you from becoming injured or burned, do the following: To prevent you from becoming injured, keep the following in mind: Before working with a high temperature Assembly (e.g., Fuser When handling heavy parts (including the printer itself), use good Assembly), turn off the power, unplug the power cord and wait until it posture to protect your back whenever you lift, move or place parts.
  • Page 11 Consumables Improper Printer Use Some parts may cause a particulate explosion or fire if handled Modifying, revising, tampering with the printer, especially to the safety improperly. Do not handle these parts near fire or throw into a fire. mechanism, is strictly prohibited in all circumstances. Some materials (e.g., Developer or Fuser Oil) may cause bodily injury.

  • Page 13: Manual Contents

    Manual Contents Chapter 1 Product Descriptions Chapter 2 Operating Principles Chapter 3 Disassembly and Assembly / Adjustment Chapter 4 Diagnostics Chapter 5 Troubleshooting Chapter 6 Maintenance Appendix...
  • Page 14 Revision Status Revision Date of Issue Description July 10th, 2000 First issue July 18th, 2000 Chapter 1: Further information on 1.5.2“Support Mode” is added. Chapter 5: A LCD/ warning message “Worn Fuser” is added; In 5.1.4.4“Service-Call Error Messages”, FIPs are added to the relating tables and some error messages are changed.

  • Page 15: Table Of Contents

    EPSON AcuLaser C8500 Revision C Chapter 1 PRODUCT DESCRIPTIONS 1.6.1 Setting Methods ..............1-38 1.6.1.1 OneTouch mode ............. 1-38 1.1 Features ....................1-2 1.6.1.2 SelecType mode ............1-39 1.2 Specifications ..................1-3 1.6.2 SelecType Setting Menu List ..........1-39 1.2.1 Basic Specifications ..............1-3 1.6.3 Details of Menus and Settings ..........
  • Page 16 EPSON AcuLaser C8500 Revision C 2.3.5 INV MOTOR ASSY (Option Duplex) ........2-17 2.7.7 XERO. Control ..............2-56 2.3.6 Gear Layout ................2-18 2.7.7.1 Operation when DRUM CARTRIDGE is Replaced ..2-56 2.3.6.1 Printer ................2-18 2.7.7.2 DRUM CARTRIDGE Life Detection Control ....2-56 2.3.6.2 Option Duplex ..............
  • Page 17 EPSON AcuLaser C8500 Revision C 3.2.8.10 PITCH SENSOR (PL4.3.6) Removal ......3-38 3.2.4 Updating the MCU PWB (Mechanical Controller) Firmware ... 3-9 3.2.5 Cover ..................3-10 3.2.8.11 MSI FEED FRAME ASSY (PL4.3.20) Removal ... 3-38 3.2.5.1 FRONT COVER ASSY (PL1.1.1) Removal ....3-10 3.2.8.12 LEVEL SENSOR (PL4.3.23) Removal ......
  • Page 18 EPSON AcuLaser C8500 Revision C 3.2.15.1 DEVE. TIE PLATE (PL12.1.3) Removal ....... 3-99 3.2.12.2 MAIN FUSER ASSY (PL9.1.2) Removal ...... 3-71 3.2.12.3 UPPER GUIDE ASSY (PL9.2.20) Removal ....3-72 3.2.16 Electrical ................3-100 3.2.12.4 FUSER UPPER ASSY (PL9.2.30) Removal ....3-73 3.2.16.1 LVPS (PL13.1.1) Removal .........
  • Page 19 EPSON AcuLaser C8500 Revision C 4.2.4 Operating the Diagnostics Commander ........ 4-11 5.1.4.3 Warning Message ............5-15 4.2.4.1 Starting Up the Diagnostics Commander ....... 4-11 5.1.4.4 Service-Call Error Messages .......... 5-19 4.2.4.2 Communications Connection ......... 4-11 5.2 Level 1 FIP (Fault Isolation Procedure) ........... 5-21 4.2.4.3 Log Display ..............
  • Page 20 EPSON AcuLaser C8500 Revision C 7.4.2 Wiring and Signal Descriptions between Components ..7-30 7.4.2.1 Configuration ..............7-30 7.4.3 Notation on the Diagrams for the Wiring and Signal Descriptions be- tween Components ................7-32 7.5 Component Layout ................7-59 7.6 Circuit Diagrams ................... 7-61...
  • Page 21 C H A P T E R PRODUCT DESCRIPTIONS...

  • Page 22: Chapter 1 Product Descriptions

    By installing additional RAM (3 slots), the maximum memory size can be expanded to 768 MB. (Note: keep the standard RAM 64MB The EPSON AcuLaser C8500 is a non-impact color page printer with a installed and use other two RAM slots if the memory needs to be resolution of 600 dpi.

  • Page 23: Specifications

    2. Through EJL, PJL and Printer MIB, the printer status and printer environment are monitored. This section describes specifications for EPSON AcuLaser C8500. 3. Remote panel function through a Web browser using EPSON Net Web 1.2.1 Basic Specifications Assist. 4. When flash DIMM is installed, ROM update function is available. (RCC...
  • Page 24 EPSON AcuLaser C8500 Revision C First print Table 1-1. Speed Mode Face-up: 10.9 seconds or less (LT/A4 LEF) LT/A4 LEF (2UP B (LD)/A3 SEF Color 25.9 seconds or less (LT/A4 LEF) Speed Standard Optional Standard Optional Print mode Face-down: 13.9 seconds or less (LT/A4 LEF)
  • Page 25 EPSON AcuLaser C8500 Revision C *2: Paper Empty condition in the MSI tray is detected. Optional cassette usage and corresponding paper capacity *3: Note the following points when setting envelopes: - Open flaps and set them facing to the tailing side.
  • Page 26 EPSON AcuLaser C8500 Revision C PAPER SIZE Normal paper: See Table 1-5. Table 1-5. Paper Size/ 2- UP Mode Availability Paper setting orientation Standard Option 2UP mode Duplex print Paper Size availability availability Universal 500-Sheet/ A3W cassette casette LCP Unit −...
  • Page 27 EPSON AcuLaser C8500 Revision C Special paper: See Table 1-6 Table 1-6. Paper Size/2-UP Mode Availability Paper setting orientation Standard Option 2UP mode Duplex print Paper Size availability availability Universal 500-Sheet/ cassette LCP Unit cassette 8.5 x 11” − −...
  • Page 28 EPSON AcuLaser C8500 Revision C See Table 1-7 for FD output availability. DIMENSIONS Table 1-7. Face-Down Output Availability Paper Size FD Availability Paper Size FD Availability Table 1-8. Dimensions Available Unavailable Description Dimension (W x D x H) mm Available...
  • Page 29 EPSON AcuLaser C8500 Revision C VOLTAGE RATED CURRENT ± ± 110/120V version: 110V/120V 10%, 50/60Hz 100 V version: 11A or less (at rated voltage) ± ± 220/240V version: 220V/240V 10%, 50/60Hz 115V version: 10A or less (at rated voltage) 240V version:...
  • Page 30 EPSON AcuLaser C8500 Revision C Energy Save mode:38.3dB (A) or less Lower power mode:35.0dB (A) or less Ozone density 0.01 ppm (time waited average value) or less. TOXICITY Photo conductor, toner, carrier, plastic material have no effect on human body.

  • Page 31: Paper Specifications

    See Table 1-10. 1.2.2.1 Paper Types NOTE: RF: Reliable feeding and good image quality Recommended paper: 4200 paper (B/W), EPSON high quality normal Possible, but limited to paper generally available paper (For color sigle-side ohly), EPSON coated N: Not supported...

  • Page 32: Printable Area

    EPSON AcuLaser C8500 Revision C 1.2.2.3 Printable Area 1) Standard Tray (MSI) / A3W Cassette MAXIMUM PRINTABLE AREA 330.2 mm 320 mm (12.6”) x 457.2 mm (18”) 5 mm 320 mm 4 mm MAXIMUM GUARANTEED PRINT AREA 297 mm 4 mm...
  • Page 33 EPSON AcuLaser C8500 Revision C 2) Standard Universal Cassette 3) 500-Sheet Paper Cassette Unit/Large Capacity Paper Unit 304.8 mm 304.8 mm 296.8 mm 296.8 mm 4 mm 4 mm 4 mm Guaranteed Guaranteed Guaranteed Guaranteed print area print area print area...

  • Page 34: Reliability And Durability

    EPSON AcuLaser C8500 Revision C 1.2.3 Reliability and Durability Table 1-12. Standard Universal Cassette MPBF Recommended Rate Normal paper Special paper paper Including the standard tray (MSI): 60,000 pages or more* Paper jam rate 1/3000 or less 1/2000 or less...
  • Page 35 EPSON AcuLaser C8500 Revision C PRINT POSITION ACCURACY MAINTAINABILITY ± Main scan direction: Reference position (c) 2.5 mm MTTR: Within 30 minutes (average) (95% is completed within 50 minutes) ± Sub scan direction: Reference position (a) 2.0 mm See Figure 1-6.

  • Page 36: Operating Environment

    EPSON AcuLaser C8500 Revision C 1.2.4 Operating Environment SURROUNDING ENVIRONMENT Be sure to leave enough space around the printer for proper printer use and TEMPERATURE/HUMIDITY operation. See Figure 1-7. ° ° ° ° Temperature: 10 to 32 Humidity: 15% to 85% RH (without condensation)

  • Page 37: Environmental Conditions For Storage And Transportation And Consumables)

    EPSON AcuLaser C8500 Revision C 1.2.5 Environmental Conditions for Storage and Drop height: Transportation and consumables) Duplex Unit: 760 mm 500-Sheet Paper Cassette Unit: 760 mm Large Capacity Paper Unit: 760 mm TEMPERATURE AND HUMIDITY A3W Cassette: 920 mm Table 1-16. Temperature and Humidity...

  • Page 38: Electrical Specifications

    EPSON AcuLaser C8500 Revision C 1.2.6 Electrical Specifications Dielectric strength Specifications here are not applicable to any optional units. There is no breakdown when the following voltages are applied for one minute. AC line noise 100V/120V model: Pulse width: 50 to 1000 ns...

  • Page 39: Process Specifications

    EPSON AcuLaser C8500 Revision C 1.2.7 Process Specifications Printing method: Dry electrophotographic with 2 ingredients Using FCCPart15 SubpartB, ClassB(ANSI 63.4/11.4D) the intermediate belt transfer system Europe: EN55022(CISPR Pubilication22), ClassB Light source: Semi-conductive laser beam Also, the printer main body meets the following...

  • Page 40: Options And Consumable Products

    Waste Toner Collector (WASTE TONER BOX) S050020 Holds two 500-sheet Large Capacity Paper Unit C813501* Photoconductor unit (DRUM CARTRIDGE) S051073 paper cassettes EPSON Color Laser Paper (A4) S041215 Holds one 500-sheet 500-Sheet Paper Cassette Unit C813511* paper cassette EPSON Color Laser Paper (A3) S041216...
  • Page 41 50 mm x 400 mm x 54.5 mm Weight: 0.371 kg PHOTOCONDUCTOR UNIT SPECIFICATIONS Y/M/C 0.370 kg NOTE: Toner Photoconductor unit for the AcuLaser C8500 and EPL- Packed C8000/8200 are not compatible. Dimensions (W x H x D): 85 mm x 435 mm x 80 mm Weight: 0.474 kg...

  • Page 42: Regularly Replaced Parts

    *2: Tolerance for both dimension and weight is ± 1% WASTE TONER BOX SPECIFICATIONS NOTE: Waste Toner Boxes for the AcuLaser C8500 and EPL-C8000/8200 are compatible. Formation: WASTE TONER BOX and others...

  • Page 43: Exterior View And Parts

    Table 1-21. Exterior View and Parts Filter Assy 500-Sheet Paper Cassette Unit Part name Part Name Option slot cover (for EPSON RIP Station 5300) Control Panel Ethernet I/F connector Cover A / EXIT UPPER COVER Mounting screw hole for EPSON...
  • Page 44 EPSON AcuLaser C8500 Revision C Back View Front View Right View Left View Figure 1-9. Exterior Parts - Printer Main Body PRODUCT DESCRIPTIONS Specifications 1-24...
  • Page 45 EPSON AcuLaser C8500 Revision C Front View Left View Right View Back View Figure 1-10. Exterior Parts - Options PRODUCT DESCRIPTIONS Specifications 1-25...

  • Page 46: Controller Specifications

    Program: 4MB (ROM DIMM) Font: EXPANSION ROM 3 slots (ROM DIMM slots) Slots A, B: Font ROM module, PostSccipt3 module, EPSON RIP Station 5300 module, CM table Slot C: Exclusively used for NLSP Font ROM module PRODUCT DESCRIPTIONS Specifications 1-26...

  • Page 47: Controller Configuration

    Type-B - 1 slots (for level 3) Only when Type-B level 3 is installed. Only when a PostScript3 module is installed. EPSON RIP Station 5300 interface - 1 slot (exclusive) INSTALLATION Installed to the main printer body. Timer function (for job management) 1.2.13 Controller Configuration...

  • Page 48: Interface Specifications

    IEEE 1284 High-Speed Bi-directional Parallel I/F 2. Ethernet interface Optional: Type-B host interfaces (1 slot) OPERATING MODES By installing the I/F board for EPSON RIP Station 5300, EPSON RIP Station Compatibility, Nibble, ECP 5300 panel and scanner interface are equipped. SYNCHRONIZATION /STROBE pulse...
  • Page 49 EPSON AcuLaser C8500 Revision C Table 1-23. Centronics Parallel Interface Pin Assignment Table 1-22. Data Transmission Timing Pin # Signal Names Descriptions Min. Typ. Latch pulse used to read data. DATA is valid STRBX when the signal is LOW. Data hold setup 0.5 us...

  • Page 50: Ethernet Interface

    †3: Displays model name AL-C8500 RJ45 †4: Manufacturer and model name are displayed EPSON AL-C8500 Note the MFG, MDL, DES, and CID can be defined by the users. The CID field, APPLICABLE CABLE which does not reply at initialized device ID, only replies with a user-defined character string.

  • Page 51: Type B Interface

    EPSON AcuLaser C8500 Revision C 1.3.3 Type B Interface Table 1-24. Pin Configuration for the Ethernet I/F This printer is equipped with a slot for Type B optional interface. Signal Name MAIN SYSTEM TYPE MTP600dpi,PW7748dt600dpi,PRG(*****)rev.AP1300ma,SPD0fast,D4 ∗ ∗ ∗ ∗ ∗...

  • Page 52: Control Panel

    EPSON AcuLaser C8500 Revision C 1.4 Control Panel Emulation type Emulation = AUTO This section describes the control panel of this printer and its functions. 1) When PS is not started :AUTO (Emulation Types 1, 2, 3 . . .) 2) When PS is started : EJL (POSTSCRIPT-00, other Emulation 1.4.1 Appearance and Descriptions...
  • Page 53 EPSON AcuLaser C8500 Revision C Table 1-26. LEDs and switches on the Control Panel Button Location Name Remarks Location Name Remarks Continue LED SelecType/Alt button Also serves as the Shift button OneTouch Mode 2 LED Menu Select button OneTouch Mode 1 LED...

  • Page 54: Led Description

    EPSON AcuLaser C8500 Revision C 1.4.1.1 LED Description OneTouch Mode 2 LED (F) OneTouch mode 2 is enabled. The following 4 items can be LCD (Liquid Crystal Display) (A) set in this mode: “RITech”, “Copies”, “Mp Tray Size”, “Toner Save Mode”...
  • Page 55 EPSON AcuLaser C8500 Revision C SelecType button (K) (or Shift button) Value button (N) Used to select OneTouch mode 1 / OneTouch mode 2 / SelecType mode, as Pressing this button enables the item that was last selected. follows: In OneTouch mode 1, used to select the value for “Manual Feed”.

  • Page 56: Service Functions

    EPSON AcuLaser C8500 Revision C 1.5 Service Functions 1.5.1 Hex Dump Mode Buttons: Form Feed + Power on Turning the printer on while pressing the specified button(s) until RAM check is Functions: “Hex Dump” is indicated. Received data is converted into completed provides several service functions.

  • Page 57: Panel Setting Value Initialization

    EPSON AcuLaser C8500 Revision C 1.5.4 Panel Setting Value Initialization 1.5.8 Maintenance Mode Buttons: Continue + Power on Buttons: On Line + Form Feed + Continue + Power on Functions: All panel settings for total environment and interface- Functions: Adds the Maintenance menu to the setting menu. After specific environment are reset to the factory defaults.

  • Page 58: Panel Setting

    EPSON AcuLaser C8500 Revision C 1.6.1 Setting Methods b) Display of error details when E*** or C2000 Service-call error is indicated Step 1:Press the Continue, Alt, and Menu buttons. 1.6.1.1 OneTouch mode “ERR Y x x x x 0x********” (code and address) appears. - *1 Step 2:Press any button.

  • Page 59: Selectype Mode

    EPSON AcuLaser C8500 Revision C 1.6.1.2 SelecType mode 1.6.2 SelecType Setting Menu List NOTE: SelecType mode is effective when the printer is free from any This section contains the tables which list the SelecType setting menus. The error. factory defaults values are shown in Bold Italic style.
  • Page 60 EPSON AcuLaser C8500 Revision C Config Menu ∼ Copies ∼ Item Value Quantity RITech On, Off Manual Feed Off, On Toner Save Off, On Resolution 600, 300 Top Offset -30.0 - 0.0 - 30.0 mm step 0.5 mm Skip Blank Page...
  • Page 61 EPSON AcuLaser C8500 Revision C Network Menu ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ ∗ M Toner F, E o F, E o o F, ∗ o o o F, E o o o o F Item Value ∗ ∗ ∗ ∗...
  • Page 62 EPSON AcuLaser C8500 Revision C t LJ4 Menu †9,†27, †15 IP Byte 4 0 - 255 Item Value †9,†27, †15 SM Byte 1 0 - 255 †16 †12 †12 Font Source Resident , Download , ROM A , ROM B †9, †27, †15...
  • Page 63 EPSON AcuLaser C8500 Revision C ESCP2 Menu GL2 Menu Item Value Item Value Font Courier, Prestige, Roman, Sans serif, Roman T, Orator GLMode LJ4GL2, Gllike S, Sans H, Script, OCR A, OCR B Scale Off, A0, A1, A2, A3 Pitch 10 cpi, 12 cpi,15 cpi, Prop.
  • Page 64 EPSON AcuLaser C8500 Revision C *10 *19 Support Menu CGTable PcUSA, Italic, PcMultilin, PcPortugue, PcCanFrenc, PcNordic, PcTurkish2, PcE.Europe, BpBRASCII, Item Value BpAbicomp, Roman-8, 8859-15ISO, PcEur858, ISO Latin1 †10 HDD Format Country USA, France, Germany, UK, Denmark, Sweden, Italy, †10, †11...
  • Page 65 EPSON AcuLaser C8500 Revision C *10: Displayed only when the optional HDD is installed. *11: Displayed only when the optional PostScript 3 module is installed. Table 1-28. User Setting Items *12: Displayed only when the optional font module is installed to the optional ROM...

  • Page 66: Details Of Menus And Settings

    Revision C 1.6.3 Details of Menus and Settings QUANTITY This section contains the AcuLaser C8500 specific information on the menus Number of copies can be set for collating. Since it has priority over the setting and settings. made for “Copies”, the value set for “Copies” is ignored when the selected number of copies for “Quantity”...

  • Page 67: Config Menu

    EPSON AcuLaser C8500 Revision C Depending on the setting for Page Size or Paper Type, the available paper PAPER TYPE sources are restricted. Specifies the paper type, to which the printer refers to determine the printing NOTE: Type of paper that is selected at paper source selection is only speed and CM.

  • Page 68: Support Menu

    EPSON AcuLaser C8500 Revision C 1.6.3.6 Toner Transfer Menu COLOR PAGES The setting menue is displayed, and selection enabled, only when the Support Indicates the total number of color-printing sheets that the printer has printed. Mode has been activated by hidden operation when the power is turned on.

  • Page 69: Maintenance Menu

    EPSON AcuLaser C8500 Revision C 1.6.3.7 Maintenance Menu IBT CLEANER CLEAR This menu is indicated and selected only while the Maintenance Mode is Resets the IBT Cleaner counter. The maintenance engineer must reset this activated by the service function at power-on. To eliminate this menu from the counter after replacing the IBT Cleaner with a new one.
  • Page 70 EPSON AcuLaser C8500 Revision C K DEVELOPMENT CLEAR Resets the K Development counter. The maintenance engineer must reset this counter after replacing the K Development with a new one. When the reset operation is done, the printer reboots. Then, be sure to open the Front Cover and close it to make the operation effective.

  • Page 71: Ram Expansion

    1.7 RAM Expansion 1.8 Dimensions This printer generates the following errors when it detects insufficient memory The dimention of EPSON AcuLaser C8500 is shown below.. condition. “Mem Overflow”, “Image Optimum”, “Need Memory” In this case, try taking any of the actions below. See Table 1-29.

  • Page 72: Engine Restrictions

    EPSON AcuLaser C8500 Revision C Figure 1-17. With 500-sheet Paper Cassette Unit Figure 1-15. With Large Capacity Paper Unit and Duplex Unit 1.9 Engine Restrictions The engine restrictions are classified as follows. Refer to the following tables for more details.
  • Page 73 EPSON AcuLaser C8500 Revision C Table 1-29. Restrictions on the period from powering on to printing enable Operational Item IBT Rotations Description Notes Conditions CRU installation, check if there is any paper M/C Check Approx. 6-7 Each time. jam remaining.
  • Page 74 EPSON AcuLaser C8500 Revision C Table 1-30. Restrictions on the period from the print command is received to printing started (Density adjustment at Cycle up) Operational Item IBT Rotations Description Notes Conditions 1. At power on and Fuser temperature is 94C or less.
  • Page 75 EPSON AcuLaser C8500 Revision C Table 1-31. Restricts on continuous printing Operational Item IBT Rotations Description Notes Conditions 1. Color mode 65%: total A3 2 pages detected. 50%: total A3 10pages detected. -Cycle-down is done after the printing 35%: total A3 48pages detected.
  • Page 76 EPSON AcuLaser C8500 Revision C Table 1-32. Restrictions on the period from printing finished to mechanism ceases (Density adjustment at Cycle down) Operational Item IBT Rotations Description Notes Conditions 1. Fuser temperature is 94C or less. 2. Every 20 pages(40 pages when 2-up printing.
  • Page 77 EPSON AcuLaser C8500 Revision C Table 1-33. Others Operational Item IBT Rotations Description Notes Conditions P/H motor rotation P/H motor starts its rotation 1 minute before Measures for fixing inferior at start-up. 1 minute during warm-up warm-up completed. (Photoconductor does not rotate)

  • Page 78: Chapter 2 Operating Principles

    C H A P T E R OPERATING PRINCIPLES...

  • Page 79: Print Process

    EPSON AcuLaser C8500 Revision C 2.1 Print Process 2.1.1 Print Process Overview This printer is a full color laser printer that works by the principle of electrophotographic recording. Printers using the principle of electrophotographic recording available up to now were only capable of printing with a single color of toner.

  • Page 80: Total Print Process Schematic Diagram

    EPSON AcuLaser C8500 Revision C 2.1.2 Total Print Process Schematic Diagram The schematic diagram of the entire print process is as shown below. NOTE: DEVELOPER ASSY Y, DEVELOPER ASSY M, DEVELOPER ASSY C, and DEVELOPER ASSY BK are hereinafter referred to by the generic term “Developer Assy.”...

  • Page 81: Print Process Technical Explanation

    EPSON AcuLaser C8500 Revision C 2.1.3 Print Process Technical Explanation 2.1.3.1 Electrification The surface of the drum turning at a certain speed is uniformly electrified with a negative charge by discharging the BCR (Bias Charge Roll) inside the DRUM CARTRIDGE.

  • Page 82: Exposure

    EPSON AcuLaser C8500 Revision C 2.1.3.2 Exposure The hole moves toward the outer surface of the photoconductive layer, where it reunites with the negative charge (electron) of the outer surface, This is the step where the negatively charged drum surface is scanned with thus reducing the negative charge.

  • Page 83: Developing

    EPSON AcuLaser C8500 Revision C 2.1.3.3 Developing In this step, toner is electrically applied to the invisible electrostatic latent image on the drum surface, forming a visible image with toner on the drum. The printer employs “rotary developing” whereby 4 developers (Developer Assy) are rotated/moved in sequence, and “trickle developing”...
  • Page 84 EPSON AcuLaser C8500 Revision C As the number of prints increases, more toner in the developer is The developing charge characteristics of the developer gradually consumed. In order to maintain the proper developing concentration, an deteriorate due to dirt on the surface produced by toner and smashing of amount of toner equal to the amount consumed must be replenished from the surface due to mixing.

  • Page 85: Primary Transfer (Drum --> Belt)

    EPSON AcuLaser C8500 Revision C 2.1.3.4 Primary Transfer (Drum --> Belt) This is the This is the step where toner image formed on the drum surface is transferred to the Belt of the TRANSFER ASSY by the 1ST BTR (First Bias Transfer Roll).

  • Page 86: Cleaning (Drum)

    EPSON AcuLaser C8500 Revision C 2.1.3.5 Cleaning (Drum) Electrical drum cleaning A charge remains on the drum surface even after the excess toner is This is the step where excess toner and residual charge are eliminated from scraped off by the Cleaning Blade. If the charge is allowed to remain on the the drum.

  • Page 87: Repeat (Complete Toner Image Forming)

    EPSON AcuLaser C8500 Revision C 2.1.3.6 Repeat (Complete Toner Image Forming) This is the step where the complete toner image consisting of 4 colors is formed on the Belt by sequentially transferring toner images of each color on the drum surface to the Belt.

  • Page 88: Secondary Transfer (Belt --> Paper)

    EPSON AcuLaser C8500 Revision C 2.1.3.7 Secondary Transfer (Belt --> Paper) This is the step where the complete toner image formed on the Belt is transferred to paper by supplying voltage to the CONTACT ROLL, BACK UP ROLL, AND 2ND BTR (Second Bias Transfer Roll).

  • Page 89: Electrical Discharge

    EPSON AcuLaser C8500 Revision C 2.1.3.8 Electrical Discharge A total of 4 toner images is transferred from the drum to the Belt at the “Repeat (Complete Toner Image Formation) step. During this time, the This is the step where the paper charge is neutralized/eliminated by allowing...

  • Page 90: Cleaning (Belt)

    EPSON AcuLaser C8500 Revision C 2.1.3.9 Cleaning (Belt) 2.1.3.10 Fixing This is the step where toner remaining on the belt after transferring the This is the step where toner is fixed on the paper by heat and pressure. complete toner image to the paper is physically removed.

  • Page 91: Print Data Flow

    EPSON AcuLaser C8500 Revision C 2.2 Print Data Flow NOTE: Formation of secondary print image A line of dot images is formed by scanning while laser radiation is turned ON/OFF in accordance with electric signals (VIDEO signal: 2.2.1 Data Flow Expresses image data according to high/low voltage level) from the printer controller.

  • Page 92: Drive Transmission Route

    EPSON AcuLaser C8500 Revision C 2.3 Drive Transmission Route 2.3.2 FUSER MOTOR ASSY Rotation force of the FUSER MOTOR ASSY is conveyed via the FUSER 2.3.1 PROCESS DRIVE ASSY DRIVE ASSY by the following flow. Rotation force of the PROCESS DRIVE ASSY is conveyed by the following flow.

  • Page 93: P/H Motor Assy

    EPSON AcuLaser C8500 Revision C 2.3.3 P/H MOTOR ASSY 2.3.4 ROTARY MOTOR ASSY Rotation force of the P/H MOTOR ASSY is conveyed via the P/H DRIVE ASSY Rotation force of the ROTARY MOTOR ASSY drives the ROTARY FRAME by the following flow.

  • Page 94: Inv Motor Assy (Option Duplex)

    EPSON AcuLaser C8500 Revision C 2.3.5 INV MOTOR ASSY (Option Duplex) Rotation force of the INV MOTOR ASSY is conveyed by the following flow. Figure 2-25. INV Motor Assy Operating Principles 2-17...

  • Page 95: Gear Layout

    EPSON AcuLaser C8500 Revision C 2.3.6 Gear Layout 2.3.6.1 Printer Figure 2-26. Gear Layout - Printer Operating Principles 2-18...

  • Page 96: Option Duplex

    EPSON AcuLaser C8500 Revision C 2.3.6.2 Option Duplex Figure 2-27. Gear Layout - Option Duplex Operating Principles 2-19...

  • Page 97: Paper Feed

    EPSON AcuLaser C8500 Revision C 2.4 Paper Feed 2.4.1 Paper Feed Path (When no options are installed) NOTE: The paper feed at the bottom of the printer is called “Cassette 1”, the first level of the optional FEEDER UNIT is called “Cassette2, and the second level is called “Cassette 3”.

  • Page 98: Paper Feed Path (Option Duplex)

    EPSON AcuLaser C8500 Revision C 2.4.2 Paper Feed Path (Option Duplex) Figure 2-29. Paper Feed Path (Option Duplex) Operating Principles 2-21...

  • Page 99: Paper Conveyance Path Layout

    EPSON AcuLaser C8500 Revision C 2.4.3 Paper Conveyance Path Layout Figure 2-30. Paper Conveyance Path Layout Operating Principles 2-22...

  • Page 100: Function Of Main Working Parts

    EPSON AcuLaser C8500 Revision C 2.5 Function of Main Working Parts 2.5.1 Paper Cassette The main working parts of the printer are explained in correspondence to the UNIVERSAL CASSETTE drawings. The parts are divided into the following blocks according to The END GUIDE is a movable guide that moves in the paper conveyance configuration.

  • Page 101: Paper Feeder

    EPSON AcuLaser C8500 Revision C 2.5.2 Paper Feeder SIZE SWITCH ASSY With 4 Paper Size Switches are attached directly to the plate, the SIZE SWITCH ASSY detects paper size and whether or not there is paper in the paper by the switch ON/OFF combinations by change in position of the SIZE ACTUATOR.
  • Page 102 EPSON AcuLaser C8500 Revision C TURN ROLL ASSY The TURN ROLL ASSY receives drive by the P/H MOTOR ASSY and rotates, feeding paper discharged from the paper to the MAIN P/H ASSY. TURN CLUTCH The TURN CLUTCH is transmits a drive from P/H MOTOR ASSY to TURN ROLL ASSY.

  • Page 103: Msi/Paper Transportation I

    EPSON AcuLaser C8500 Revision C 2.5.3 MSI/Paper Transportation I REGI/MSI INTL SW Detect that MSI/REGI HIGH ASSY is being inserted into the printer securely. MSI BASE ASSY BOTTOM PLATE SENSOR MSI GUIDE SWITCH Detects the paper feed angle (max 15 ) of the BOTTOM PLATE, and control the LIFT MOTOR ASSY.
  • Page 104 EPSON AcuLaser C8500 Revision C 2.5.4 MSI/Paper Transportation II MAIN P/H FRAME ASSY The MAIN P/H FRAME ASSY consists of the following parts: P/REGI. ROLL ASSY REGI. CLUTCH ASSY PRE-REGI. CLUTCH ASSY REGI. SENSOR OHP SENSOR REGI. METAL ROLL REGI. RUBBER ROLL ASSY The REGI.

  • Page 105: Msi/Paper Transportation Ii

    EPSON AcuLaser C8500 Revision C The OHP SENSOR detects the front/back of OHP film (for color). (For details, see 2.7.4 "OHP Front/Back Detection Control".) REGI/MSI INTL SW The REGI/MSI INTL SW detects if the MSI/ REGI HIGH ASSY is installed to the printer.

  • Page 106: Xerographics I

    EPSON AcuLaser C8500 Revision C 2.5.5 Xerographics I Image data is input to the ROS ASSY as an electric signal (expresses image data according to voltage level). The LD ASSY (Laser Diode Assembly) converts the image data from electric signals to light signals ROS ASSY (expresses data by flashing the laser beam on and off).

  • Page 107: Xerographics Ii

    EPSON AcuLaser C8500 Revision C 2.5.6 Xerographics II ADC SENSOR ASSY The ADC ASSY consists of the ADC Sensor and ADC Solenoid, ADC Sensor. DRUM CARTRIDGE ADC Sensor The DRUM CARTRIDGE consists of the XERO. CARTRIDGE and WASTE The ADC (Automatic Density Control) Sensor reads density of the toner TONER BOX.
  • Page 108 EPSON AcuLaser C8500 Revision C Figure 2-38. Xerographics II Operating Principles 2-31...

  • Page 109: Development

    EPSON AcuLaser C8500 Revision C 2.5.7 Development The Magnet Roll attracts carrier (which is a magnetic material) by force of magnetism, forms a uniform layer of developer, and supplies toner to the drum. CARTRIDGE SENSOR Trimmer Blades are arranged at positions having a certain clearance with the Magnet Roll, and form a uniform layer of developer on the Magnet Roll.
  • Page 110 EPSON AcuLaser C8500 Revision C Figure 2-39. Development Operating Principles 2-33...

  • Page 111: Ibt I

    EPSON AcuLaser C8500 Revision C 2.5.8 IBT I The IBT BELT ASSY transfers a toner image of each color developed on the drum to the IST BTR, forming a complete toner image of the 4 overlapped colors. When the 4-color toner image is formed, a supply of...

  • Page 112: Ibt Ii

    EPSON AcuLaser C8500 Revision C 2.5.9 IBT II The BTR CAM ASSY, by operating the BTR CAM, make the advance / retract of the 2ND BTR CAM CLUTCH carry out . 2ND BTR ASSY BELT CLEANER ASSY The 2ND BTR ASSY consists of the following parts:...
  • Page 113 EPSON AcuLaser C8500 Revision C The Auger transports the toners scraped away by the Cleaning Blade to the AUGER HIGH ASSY. (The AUGER HIGH ASSY transports toner to the WASTE TONER BOX.) Figure 2-41. IBT II Operating Principles 2-36...

  • Page 114: Fusing I

    EPSON AcuLaser C8500 Revision C 2.5.10 Fusing I contact inside the Thermostat to open, forcibly interrupting the power supply to the H/R HEATER and P/R HEATER, thus preventing secondary overheating. FUSER ASSY The Thermal Fuse is directly connected to the power supply circuit for the H/R HEATER and P/R HEATER.

  • Page 115: Fusing Ii

    EPSON AcuLaser C8500 Revision C 2.5.11 Fusing II EXIT-1 ROLL ASSY Transports prints coming from the MAIN FUSER ASSY after fixing. FUSER ASSY Along with fixing unfixed toner transferred to paper with heat and pressure, the FUSER ASSY transports the paper before and after fixing. The FUSER ASSY consists of the MAIN FUSER ASSY and FUSER ASSY.

  • Page 116: Paper Exit

    EPSON AcuLaser C8500 Revision C 2.5.12 Paper Exit EXIT-2 ROLL ASSY Transports prints after fixing for FACE DOWN discharge on the TOP COVER ASSY. EXIT-3 ROLL ASSY Transports prints after fixing for FACE DOWN discharge on the TOP COVER ASSY.

  • Page 117: Drive

    EPSON AcuLaser C8500 Revision C 2.5.13 Drive FUSER DRIVE ASSY Transmits drive of the FUSER MOTOR ASSY to the FUSER ASSY, 2ND BTR PROCESS DRIVE ASSY ASSY, Developer Assy, etc. The PROCESS DRIVE ASSY provides drive for the DRUM CARTRIDGE and TRANSFER ASSY.
  • Page 118 EPSON AcuLaser C8500 Revision C Figure 2-45. Drive Operating Principles 2-41...

  • Page 119: Electrical

    EPSON AcuLaser C8500 Revision C 2.5.14 Electrical BCR inside DRUM CARTRIDGE Magnet Roll inside Developer Assy FRONT COVER SWITCH R 1ST BTR inside TRANSFER ASSY CONTACT ROLL inside TRANSFER ASSY FRONT COVER SWITCH R is composed of two switches of an interlock switch...
  • Page 120 EPSON AcuLaser C8500 Revision C Figure 2-46. Electrical Operating Principles 2-43...

  • Page 121: Option Duplex

    EPSON AcuLaser C8500 Revision C 2.5.15 Option Duplex Option Duplex consists of the three parts. 1) DUP TRANSPORT ASSY, 2) INVERTER ASSY 3) ALIGNER ASSY. You can print the both side of paper by adding this unit. Figure 2-47. Whole Drawing Figure 2-48.
  • Page 122 EPSON AcuLaser C8500 Revision C DUP CONTROLLER PWB 1. DUP TRANSPORT ASSY Do the control of each movement of Option Duplex. DUP GATE SOLENOID FORWARD CLUTCH Control the way that there are two of the FACE DOWN discharge and the Transmit the drive of INV MOT-ASSY to INV2 ROLLER-ASSY.
  • Page 123 EPSON AcuLaser C8500 Revision C EXIT SENSOR EXIT SENSOR measures the end of the paper carried by DUP TRANSPORT ASSY, and detect the reversal timing. Operating Principles 2-46...
  • Page 124 EPSON AcuLaser C8500 Revision C 3. ALIGNER ASSY IN ROLLER-ASSY IN ROLLER-ASSY turns a drive from ALIGNER DRIVE CLUTCH through BELT 346, and carries the paper sent off from INVERTER ASSY into ALIGNER ASSY. OUT ROLLER-ASSYA drive from ALIGNER DRIVE CLUTCH is taken, and OUT ROLLER-ASSY rotates, and carries a paper to MAIN P/H FRAME ASSY.

  • Page 125: Operation Mode

    EPSON AcuLaser C8500 Revision C 2.6 Operation Mode Transition from mode to mode is as shown below The printer is equipped with the following 5 modes: WARM UP MODE Mode in which the printer warms up (until ready to print).

  • Page 126: Control

    EPSON AcuLaser C8500 Revision C 2.7 Control NOTE: The Paper Size Switches are from left to right SW SW2, SW3, and SW4. ON is 1 and OFF is 0. 2.7.1 Paper Size Control Analog Input Test Data and SIZE SWITCH signal voltage according to ON/...

  • Page 127: Cassette 2/Cassette 3 Paper Size Control

    EPSON AcuLaser C8500 Revision C 2.7.2 Cassette 2/Cassette 3 paper size control Analog Input Test Data and SIZE SWITCH signal voltage according to ON/ OFF of Paper Size Switch of SIZE SWITCH ASSY and diagnostics signal corresponding to paper size are as follows.

  • Page 128: Paper Supply Unit Selection Control

    EPSON AcuLaser C8500 Revision C 2.7.3 Paper Supply Unit Selection Control 2.7.4 OHP Front/Back Detection Control If not controlled by the printer controller, the paper supply unit selected when OHP white frame detection control is intended to prevent OHP film with white the power is turned ON is as follows: frame from getting stuck on the HEAT ROLL.

  • Page 129: Ros Control

    EPSON AcuLaser C8500 Revision C 2.7.5 ROS Control APC EXECUTION TIMING 1) Prior to printing (print job). 2.7.5.1 Scanner Motor Operation 2) When VREF signal (reference voltage corresponding to target values for The Scanner Motor is turned ON/OFF as follows for each mode: quantity of light) is changed by potential control (when target values for quantity of light are altered).

  • Page 130: Process Control

    EPSON AcuLaser C8500 Revision C 2.7.6 Process Control In order to conduct consistent printing, parameters concerning image forming must be corrected at the appropriate time. Control of the entire printing process including parameter correction control is referred to as “process control.”...

  • Page 131: Toner Concentration Control (Pcdc)

    EPSON AcuLaser C8500 Revision C 2.7.6.2 Toner Concentration Control (PCDC) 2.7.6.3 Toner Concentration Control (ADC) Concentration of toner in the developer (amount of toner to developer) is In order to conduct consistent printing, the actual amount of toner in developer reduced by printing.

  • Page 132: Adc Solenoid Operation

    EPSON AcuLaser C8500 Revision C 2.7.6.4 ADC Solenoid Operation NOTE: BIAS development bands” are images developed by negatively charged toner in the BCR electrification section by raising the BCR Every 1000 counts (nominal) the ADC Solenoid operates twice (nominal) at a voltage and developing voltage.

  • Page 133: Xero. Control

    EPSON AcuLaser C8500 Revision C 2.7.7 XERO. Control 2.7.7.2 DRUM CARTRIDGE Life Detection Control Life Detection 2.7.7.1 Operation when DRUM CARTRIDGE is Replaced Life of the DRUM CARTRIDGE is affected by the total number of revolutions of When the DRUM CARTRIDGE is replaced with a new one, the following image the drum.

  • Page 134: Waste Toner Box Full Detection Control

    EPSON AcuLaser C8500 Revision C 2.7.7.3 WASTE TONER BOX Full Detection Control Determines when the WASTE TONER BOX is full of toner by the chart on the next page (see Figure 2-59, "Waste Toner Box Full Detection Control".) to prevent misdetection of the WASTE TONER SENSOR.
  • Page 135 EPSON AcuLaser C8500 Revision C Counter A and Counter C are triggered simultaneously when the WASTE TONER SENSOR detects continuous 30 seconds “toner full” (output: High). Counter B is triggered simultaneously when the Case where “toner full” is Case where “toner full” is still...

  • Page 136: Deve. Control

    EPSON AcuLaser C8500 Revision C 2.7.8 DEVE. Control TONER FULL DETERMINATION FLOW 2.7.8.1 Home Position Detection Operation The home position is the position which serves as the starting point for DEVE. Control. The following condition is the home position of the ROTARY FRAME ASSY.

  • Page 137: Toner Cartridge Presence Detection Position

    EPSON AcuLaser C8500 Revision C 2.7.8.2 Toner Cartridge Presence Detection Position 2.7.8.4 Developing Position The various color Toner Cartridges are transferred to the following detection The various color Developer Assy are transferred to the following developing positions by rotation of the ROTARY FRAME ASSY, where the CARTRIDGE positions by rotation of the ROTARY FRAME ASSY.

  • Page 138: Detection Method Accompanying Deve. Control

    EPSON AcuLaser C8500 Revision C 2.7.8.5 Detection Method Accompanying DEVE. Control No toner detection flow TONER CARTRIDGE PRESENCE DETECTION Whether or not the various color Toner Cartridges are mounted is detected at the Toner Cartridge presence detection position by the CARTRIDGE SENSOR.
  • Page 139 EPSON AcuLaser C8500 Revision C No toner reset flow Figure 2-63. No Toner Reset Flow Operating Principles 2-62...

  • Page 140: Ibt Control

    EPSON AcuLaser C8500 Revision C 2.7.9 IBT Control Monitor environment temperature/humidity, and decide compensation 2.7.9.1 Primary Transfer (Drum --> Belt) value by the temperature/humidity. The act of transferring the toner image formed on the surface of the drum to the Belt is called “primary transfer”.

  • Page 141: Secondary Transfer (Belt-->Paper)

    EPSON AcuLaser C8500 Revision C PRIMARY TRANSFER VOLTAGE DETERMINATION TIMING Monitor environment temperature/humidity, and decide compensation value by the temperature/humidity. The process of determining primary transfer voltage is executed only during the Cycle Up Sequence of process control, and is carried out for “C2” seconds “C1”...
  • Page 142 EPSON AcuLaser C8500 Revision C SECONDARY TRANSFER VOLTAGE DETERMINATION TIMING The secondary transfer voltage determination flow is carried out if any of the conditions are found to apply when checking conditions during the Cycle Up Sequence of process control, and is carried out for “D2” seconds “D1” seconds following the TO signal when process control ends.

  • Page 143: Belt Cleaning

    EPSON AcuLaser C8500 Revision C 2.7.9.3 Belt Cleaning TYPES OF BELT CLEANING An image cannot be properly formed if there is excess toner on the surface of Belt cleaning is basically classified as the following 3 types: the Belt. To remove toner, etc., the BELT CLEANER ASSY advances and cleans the surface of the Belt.

  • Page 144: Ibt-Related Life Detection Control

    EPSON AcuLaser C8500 Revision C 2.7.9.4 IBT-related life detection control IBT cleaner toner band image The IBT Cleaner toner band is the image which is equal to “Cin 50%”, and it is Life detection of the following 3 items is done with IBT.

  • Page 145: Transfer Layout Control

    EPSON AcuLaser C8500 Revision C 2.7.10 Transfer Layout Control The printing sequence of each transfer layout mode is as follows: Table 2-8. 1UP/2UP Control Transfer Applicable Image positioning Applicable paper Applicable layout speed for Belt 1 cycle size color mode...
  • Page 146 EPSON AcuLaser C8500 Revision C TR0-LESS MODE As for how many sheets, paper carriage is not selected per Belt cycle. It is done to become a fixed paper interval regardless of the paper size when it is printed continuously. The formation of the print image (Complete toner figure) is done to become a fixed interval for every image when it is printed continuously in the same way as the paper carriage, too.

  • Page 147: Fuser Control

    EPSON AcuLaser C8500 Revision C 2.7.11 FUSER Control 2.7.11.3 READY / LIGHT SLEEP / DEEP SLEEP Modes Control 2.7.11.1 Fuser Control Method ON/OFF control of the H/R HEATER and P/R HEATER is as follows: FUSER temperature is carried out by controlling ON/OFF of the H/R HEATER and P/R HEATER according to FUSER control temperature.

  • Page 148: Fuser Skidding

    EPSON AcuLaser C8500 Revision C 2.7.11.5 FUSER skidding 2.7.11.7 MAIN FUSER ASSY Life Detection Control Life detection When the heat distribution of HEAT ROLL and PRESSURE ROLL is not The life of the MAIN FUSER ASSY is affected by the number of sheets of uniform because a problem comes out in the fixation performance, the the print to be fixed.

  • Page 149: Controller Operating Principles

    EPSON AcuLaser C8500 Revision C 2.8 Controller Operating Principles Table 2-11. MAIN BOARD Parts Code This section describes C311MAIN board which is the MAIN CONTROLLER of Model Name Part No. LP-8500C/LP-8500CPD. LP-8500C/LP-8500CPD 2034672 The main functions of the C311MAIN board are as follows:...
  • Page 150 EPSON AcuLaser C8500 Revision C Cooling fan Figure 2-71. C287MAIN Board Circuit Diagram Operating Principles 2-73...
  • Page 151 EPSON AcuLaser C8500 Revision C Table 2-12. C287MAIN Board Major Components Table 2-12. C287MAIN Board Major Components Components Location Function Refer to: Components Location Function Refer to: AD9561 8-bit PWM controller (directly connected to RISC-CPU A RISC*-type CPU, which operates at 266...
  • Page 152 EPSON AcuLaser C8500 Revision C Table 2-12. C287MAIN Board Major Components Components Location Function Refer to: SG-8002 CRU3 Network clock operating at 50.000 MHz. ( Network circuit) PE-68517 Transistor RTC-4543 IC50 Realtime clock ROM bus A connector for CS-6500. Connect to E05B511(ASIC) ROM Bus.

  • Page 153: Chapter 3 Disassembly/Assembly/Adjustment

    C H A P T E R DISASSEMBLY/ASSEMBLY/ADJUSTMENT...

  • Page 154: Overview

    This chapter describes procedures for disassembly, assembly, and adjustment C8500. It is used for backing up the system clock. If you don’t handle the of the AcuLaser C8500. Note the procedures are applicable only when the battery properly, it may cause the battery to short-circuit or explode. Therefore, printer has no options installed.

  • Page 155: Tools

    EPSON AcuLaser C8500 Revision C 3.1.2 Tools 3.2 Disassembly/Assembly Procedures The table below shows the tools used for servicing. This section describes procedures for disassembling/assembling the printer. Unless otherwise specified, assembly can be performed by reversing the Table 3-1. Tools disassembly procedure.
  • Page 156 EPSON AcuLaser C8500 Revision C Refer to the followings which explain descriptions used in this chapter. Regarding “(PL X, Y, Z)” at the end of each heading of removal sections, it corresponds to the numbers in the part list in Appendix.

  • Page 157: Exterior View And Part Names

    EPSON AcuLaser C8500 Revision C 3.2.1 Exterior View and Part Names The part names used in this Chapter are based on the after service part names. (They differ from the ones used in Users Guide.) The names of the parts which are frequently handled by the users are shown below.

  • Page 158: Removing/Replacing The Consumables

    EPSON AcuLaser C8500 Revision C 3.2.2 Removing/Replacing the Consumables 3.2.3.1 Updating the ROM using a standard parallel interface Follow the instructions below to update the program ROM using a standard The consumables available (can be replaced by users) for this printer are as parallel interface.

  • Page 159: Updating By Copying From The Flash Rom Module

    EPSON AcuLaser C8500 Revision C 6. You see the messages changing as follows: 3.2.3.2 Updating by copying from the FLASH ROM module Follow the steps below. “Writing DIMM P” “Reset “ “Ready” → → 1. Install the ROM module which has the program ROM source to the socket B of the CONTROLLER PWB.

  • Page 160: Formatting The Flash Rom Module

    EPSON AcuLaser C8500 Revision C 3.2.3.3 Formatting the FLASH ROM Module 5. When the program has been properly updated, the printer enters the Ready status. If an error occurs, one of the following messages appears. Flash ROM module can be formatted as instructed below.

  • Page 161: Updating The Mcu Pwb (Mechanical Controller) Firmware

    EPSON AcuLaser C8500 Revision C 3.2.4 Updating the MCU PWB (Mechanical Controller) Firmware Files POW.EXE Mechanical controller firmware write program V1_03_12.MOT Mechanical controller firmware data (For “XX”, the larger the number is, the latest it is). How to write the MCU PWB firmware data 1.Connect the printer and PC with a parallel cable.

  • Page 162: Cover

    EPSON AcuLaser C8500 Revision C 3.2.5 Cover 3.2.5.2 FRONT MID COVER (PL1.1.6) Removal 1. Remove the UNIVERSAL CASSETTE. 3.2.5.1 FRONT COVER ASSY (PL1.1.1) Removal 2. Remove 2 screws (silver, cup head, 8 mm) securing the FONT MID 1. Take out the UNIVERSAL CASSETTE about 20cm. (See Section 3.2.6.1.) COVER and remove the FRONT MID COVER.

  • Page 163: Front Lower Cover (Pl1.1.5) Removal

    EPSON AcuLaser C8500 Revision C 3.2.5.3 FRONT LOWER COVER (PL1.1.5) Removal C H E C K When installing the FRONT LOWER COVER, fit the front 1. Remove the UNIVERSAL CASSETTE (See Section 3.2.6.1.) P O I N T edge to 4 hooks in the frame to set the cover to the correct 2.

  • Page 164: Top Cover Assy (Pl1.1.20) Removal

    EPSON AcuLaser C8500 Revision C 3.2.5.4 TOP COVER ASSY (PL1.1.20) Removal 1. Open the FRONT COVER ASSY. 2. Open the EXIT UPPER ASSY. NOTE: In the following step, the TOP COVER ASSY is kept connected to the printer body with a harness. Therefore, do not move the TOP COVER ASSY too far from the printer.

  • Page 165: L/H Inner Cover Assy (Pl1.1.10) Removal

    EPSON AcuLaser C8500 Revision C 3.2.5.5 L/H INNER COVER ASSY (PL1.1.10) Removal NOTE: Be sure to perform Step 1 to support the FRONT COVER ASSY. 1. Open the Universal Cassette. 2. Open the FRONT COVER. 3. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 4.

  • Page 166: Ibt Inner Cover Assy (Pl1.1.14) Removal

    EPSON AcuLaser C8500 Revision C 3.2.5.6 IBT INNER COVER ASSY (PL1.1.14) Removal 1. Open the FRONT COVER. 2. Remove the DRUM CARTRIDGE. (See Section 3.2.9.1.) 3. Remove the TENSION LEVER. (See Section 3.2.11.1.) 4. Remove 2 screws (black, cup head, 6 mm) securing the IBT INNER COVER ASSY.

  • Page 167: R/H Inner Cover Assy (Pl1.1.15) Removal

    EPSON AcuLaser C8500 Revision C 3.2.5.7 R/H INNER COVER ASSY (PL1.1.15) Removal 1. Open the FRONT COVER. 2. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 3. Remove the DRUM CARTRIDGE. (See Section 3.2.9.1.) 4. Remove the TENSION LEVER. (See Section 3.2.11.1.) 5.

  • Page 168: Rear Cover Assy (Pl1.1.30) Removal

    EPSON AcuLaser C8500 Revision C 3.2.5.8 REAR COVER ASSY (PL1.1.30) Removal When installing the REAR COVER ASSY, be sure to fasten C H E C K 1. Take out the MAIN P/H ASSY. the top 2 screws to secure the both TOP COVER ASSY P O I N T 2.

  • Page 169: Filter Assy (Pl1.1.32) Removal

    EPSON AcuLaser C8500 Revision C 3.2.5.9 FILTER ASSY (PL1.1.32) Removal 3.2.5.10 LEFT LOWER COVER (PL1.1.40) Removal 1. Holding the tab of the FILTER ASSY, unhook the FILTER ASSY and 1. Take the UNIVERSAL CASSETTE out. remove it by pulling it upward.

  • Page 170: Right Cover Assy (Pl1.1.51) Removal

    EPSON AcuLaser C8500 Revision C 3.2.5.11 RIGHT COVER ASSY (PL1.1.51) Removal 3.2.5.12 OPERATION PANEL (PL1.1.60) Removal 1. Remove 3 screws (silver, knurled, 8mm) securing the RIGHT COVER NOTE: In the first step, the TOP COVER will remain connected to the printer.

  • Page 171: Right Lower Cover (Pl1.1.50) Removal

    EPSON AcuLaser C8500 Revision C 3.2.5.13 RIGHT LOWER COVER (PL1.1.50) Removal 1. Remove 3 screws (silver, cup head, 6 mm) securing the RIGHT LOWER COVER and remove RIGHT LOWER COVER. Figure 3-15. RIGHT LOWER COVER Removal Disassembly/Assembly/Adjustment Disassembly/Assembly Procedures 3-19...

  • Page 172: Paper Tray

    EPSON AcuLaser C8500 Revision C 3.2.6 Paper Tray 3.2.6.1 UNIVERSAL CASSETTE (PL2.1.1) Removal NOTE: In the following step, be sure to handle the UNIVERSAL CASSETTE with the both hands so you do not drop the UNIVERSAL CASSETTE. 1. Draw out the UNIVERSAL CASSETTE, lift it up by its front edge, and then, keeping the cassette lift up, take the tray all the way to remove it.

  • Page 173: Front Snubber (Pl2.1.9) Removal

    EPSON AcuLaser C8500 Revision C 3.2.6.2 FRONT SNUBBER (PL2.1.9) Removal 1. Remove the UNIVERSAL CASSETTE. (See Section 3.2.6.1.) NOTE: In the following steps, be careful not to bend the edge of the FRONT SNUBBER where paper is placed. 2. Remove 2 screws (black, tapped, 8mm) securing the FRONT GUIDE ASSY and remove the FRONT GUIDE ASSY.

  • Page 174: End Guide (Pl2.1.16), Sector Gear (Pl2.1.18) Removal

    EPSON AcuLaser C8500 Revision C 3.2.6.3 END GUIDE (PL2.1.16), SECTOR GEAR (PL2.1.18) Removal 1. Remove the UNIVERSAL CASSETTE. (See Section 3.2.6.1.) 6. Remove the SECTOR GEAR SPRING from the CASSETTE HOUSING and SECTOR GEAR. 2. Move the END GUIDE to the right end (= minimum paper size fits).
  • Page 175 EPSON AcuLaser C8500 Revision C 8. Remove 2 screws (black, cup head, 8mm) securing the LOCK PLATE by the right edge. 9. Remove 2 screws (black, cup head, 10 mm) securing the LOCK PLATE by the left edge, and remove the LOCK PLATE.

  • Page 176: Paper Feeder

    EPSON AcuLaser C8500 Revision C 3.2.7 Paper Feeder 3.2.7.1 TURN IN CHUTE (PL3.1.21) Removal 1. Remove 3 screws (silver, cup head, 6 mm) securing the RIGHT COVER ASSY and remove the RIGHT COVER ASSY. 2. Open the TURN CHUTE COVER.
  • Page 177 EPSON AcuLaser C8500 Revision C TURN CHUTE UP ASSY. R/H LOWER BRACKET Figure 3-22. TURN IN CHUTE Removal - 2 Disassembly/Assembly/Adjustment Disassembly/Assembly Procedures 3-25...

  • Page 178: Turn Roll Assy (Pl3.1.23) Removal

    EPSON AcuLaser C8500 Revision C 3.2.7.2 TURN ROLL ASSY (PL3.1.23) Removal 1. Remove the UNIVERSAL CASSETTE. (See Section 3.2.6.1.) 2. Remove the FRONT MID COVER. (See Section 3.2.5.2.) 3. Remove 1 screw (silver, 8 mm) securing the FEED SHAFT GUIDE and remove it.

  • Page 179: Feed Roll (Pl3.1.31) Removal

    EPSON AcuLaser C8500 Revision C 3.2.7.3 FEED ROLL (PL3.1.31) Removal 1. Remove the UNIVERSAL CASSETTE. (See Section 3.2.6.1.) 2. Remove the FRONT MID COVER. (See Section 3.2.5.2.) 3. Remove 1 screw (silver, cup head, 6 mm) securing the TRAY SENSOR BRACKET and remove the TRAY SENSOR BRACKET.

  • Page 180: Feed Solenoid (Pl3.1.35) Removal

    EPSON AcuLaser C8500 Revision C 3.2.7.4 FEED SOLENOID (PL3.1.35) Removal 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) NOTE: In the following step, the OPTION BRACKET is kept connected to the printer body with a harness. Therefore, do not move the OPTION BRACKET away from the printer.

  • Page 181: Feed Roll Assy (Pl3.1.29) Removal

    EPSON AcuLaser C8500 Revision C 3.2.7.5 FEED ROLL ASSY (PL3.1.29) Removal 1. Remove the REAR COVER ASSY. 2. Remove the UNIVERSAL CASSETTE. (See Section 3.2.6.1.) 3. Remove the FRONT MID COVER. (See Section 3.2.5.2.) 4. Remove the HVPS. (See Section 3.2.16.2.) 5.

  • Page 182: Size Switch Assy (Pl3.1.5) Removal

    EPSON AcuLaser C8500 Revision C 3.2.7.6 SIZE SWITCH ASSY (PL3.1.5) Removal 1. Remove the REAR COVER. (See Section 3.2.5.8.) 2. Remove the LVPS. (See Section 3.2.16.1.) NOTE: In the following step, the OPTION BRACKET is kept connected to the printer body with a harness. Therefore, do not move the SIZE BRACKET ASSY away from the printer.

  • Page 183: Cassette N/P Sensor Assy (Pl3.1.30) Removal

    EPSON AcuLaser C8500 Revision C 3.2.7.7 CASSETTE N/P SENSOR ASSY (PL3.1.30) Removal C H E C K When installing the CASSETTE N/P SENSOR ASSY, route 1. Remove the UNIVERSAL CASSETTE. (See Section 3.2.6.1.) P O I N T the harness carefully so it doesn’t float.

  • Page 184: Low Paper Sensor (Pl3.1.18) Removal

    EPSON AcuLaser C8500 Revision C 3.2.7.8 LOW PAPER SENSOR (PL3.1.18) Removal 3.2.7.9 TRAY NO PAPER SENSOR (PL3.1.9) Removal 1. Remove the UNIVERSAL CASSETTE. (See Section 3.2.6.1.) 1. Remove the UNIVERSAL CASSETTE. (See Section 3.2.6.1.) 2. Remove the FRONT MID COVER. (See Section 3.2.5.2.) 2.

  • Page 185: Msi/Paper Transportation

    EPSON AcuLaser C8500 Revision C 3.2.8 MSI/Paper Transportation 3.2.8.2 MSI GUIDE SWITCH (PL4.1.18) Removal 1. Draw out the MSI/REGI HIGH ASSY. 3.2.8.1 MSI/REGI HIGH ASSY (PL4.1.5) Removal NOTE: In the following step, remove the MSI FEED ASSY if necessary. 1. Draw out the MSI/REGI HIGH ASSY.

  • Page 186: Msi Assy (Pl4.1.6) Removal

    EPSON AcuLaser C8500 Revision C 3.2.8.3 MSI ASSY (PL4.1.6) Removal 1. Draw out the MSI/REGI HIGH ASSY. 2. Disconnect 2 connectors (P/J92B and P/J113B) that connect the MSI ASSY and MAIN P/H FRAME ASSY. 3. Remove 2 screws (gold, tapped, 8 mm) securing the MSI ASSY.

  • Page 187: Msi Base Assy (Pl4.1.20) Removal

    EPSON AcuLaser C8500 Revision C 3.2.8.4 MSI BASE ASSY (PL4.1.20) Removal 3.2.8.5 MSI FEED ASSY (PL4.1.30) Removal 1. Draw out the MSI/REGI HIGH ASSY. 1. Draw out the MSI/REGI HIGH ASSY. 2. Remove the MSI ASSY. (See Section 3.2.8.3.) 2. Remove 6 screws (gold, tapped, 8 mm) securing the MSI FEED ASSY.

  • Page 188: Main P/H Frame Assy (Pl4.1.40) Removal

    EPSON AcuLaser C8500 Revision C 3.2.8.6 MAIN P/H FRAME ASSY (PL4.1.40) Removal 3.2.8.7 BOTTOM PLATE SENSOR (PL4.2.10) Removal 1. Remove the MSI/REGI HIGH ASSY. (See Section 3.2.8.1.) 1. Draw out the MSI/REGI HIGH ASSY. 2. Remove 2 screws (gold, tapped, 8 mm) securing the MSI FEED ASSY.

  • Page 189: Lift Up Frame Assy (Pl4.2.20) Removal

    EPSON AcuLaser C8500 Revision C 3.2.8.8 LIFT UP FRAME ASSY (PL4.2.20) Removal 3.2.8.9 EMPTY SENSOR (PL4.3.5) Removal 1. Draw out the MSI/REGI HIGH ASSY. 1. Draw out the MSI/REGI HIGH ASSY. 2. Disconnect 2 connectors (P/J92B and P/J113B) connecting the MSI ASSY 2.

  • Page 190: Pitch Sensor (Pl4.3.6) Removal

    EPSON AcuLaser C8500 Revision C 3.2.8.10 PITCH SENSOR (PL4.3.6) Removal 3.2.8.11 MSI FEED FRAME ASSY (PL4.3.20) Removal 1. Draw out the MSI/REGI HIGH ASSY. 1. Draw out the MSI/REGI HIGH ASSY. 2. Remove the MSI FEED ASSY. (See Section 3.2.8.5.) 2.

  • Page 191: Level Sensor (Pl4.3.23) Removal

    EPSON AcuLaser C8500 Revision C 3.2.8.12 LEVEL SENSOR (PL4.3.23) Removal 1. Draw out the MSI/REGI HIGH ASSY. 2. Remove the MSI FEED ASSY. (See Section 3.2.8.5.) 3. Remove the MSI FEED FRAME ASSY. (See Section 3.2.8.11.) 4. Remove the RTD SPRING from the MSI FEED TOP FRAME and RTD SUPPORT.

  • Page 192: P/Regi Roll Assy (Pl4.4.3) Removal

    EPSON AcuLaser C8500 Revision C 3.2.8.13 P/REGI ROLL ASSY (PL4.4.3) Removal 3.2.8.14 PRE REGI CLUTCH ASSY (PL4.4.49) Removal 1. Draw out the MSI/REGI HIGH ASSY. 1. Pull out the MSI/REGI HIGH ASSY. 2. Remove the MSI /REGI HIGH ASSY. (See Section 3.2.8.1.) 2.

  • Page 193: Regi Clutch Assy (Pl4.4.5) Removal

    EPSON AcuLaser C8500 Revision C 3.2.8.15 REGI CLUTCH ASSY (PL4.4.5) Removal 1. Pull out the MSI/REGI HIGH ASSY. 2. Remove the MSI/REGI HIGH ASSY. (See Section 3.2.8.1.) 3. Remove the MAIN P/H FRAME ASSY. (See Section 3.2.8.6.) 4. Disconnect the connector (P/J94).

  • Page 194: Regi Rubber Roll Assy (Pl4.4.7) Removal

    EPSON AcuLaser C8500 Revision C 3.2.8.16 REGI RUBBER ROLL ASSY (PL4.4.7) Removal 1. Pull out the MSI/REGI HIGH ASSY. 2. Remove the MSI/REGI HIGH ASSY. (See Section 3.2.8.1.) 3. Remove the MAIN P/H FRAME ASSY. (See Section 3.2.8.6.) 4. Remove the REGI CLUTCH ASSY. (See Section 3.2.8.15.) 5.

  • Page 195: Regi Metal Roll (Pl4.4.8) Removal

    EPSON AcuLaser C8500 Revision C 3.2.8.17 REGI METAL ROLL (PL4.4.8) Removal 1. Pull out the MSI/REGI HIGH ASSY. 2. Remove the MSI/REGI HIGH ASSY. (See Section 3.2.8.1.) 3. Remove the MAIN P/H FRAME ASSY. (See Section 3.2.8.6.) 4. Remove the REGI CLUTCH ASSY. (See Section 3.2.8.15.) 5.

  • Page 196: Ibt Regi Chute (Pl4.4.14) Removal

    EPSON AcuLaser C8500 Revision C 3.2.8.18 IBT REGI CHUTE (PL4.4.14) Removal 1. Pull out the MSI/REGI HIGH ASSY. 2. Remove the MSI/REGI HIGH ASSY. (See Section 3.2.8.1.) 3. Remove the MAIN P/H FRAME ASSY. (See Section 3.2.8.6.) 4. Remove the 2 screws (gold, tapping, 6mm) securing the IBT REGI CHUTE, and remove the IBT REGI CHUTE.

  • Page 197: Regi Sensor (Pl4.4.24) Removal

    EPSON AcuLaser C8500 Revision C 3.2.8.19 REGI SENSOR (PL4.4.24) Removal 1. Pull out the MSI/REGI HIGH ASSY. 2. Remove the MSI/REGI HIGH ASSY. (See Section 3.2.8.1.) 3. Remove the MAIN P/H FRAME ASSY. (See Section 3.2.8.6.) 4. Remove the screw (gold, tapping, 8mm) securing the P/H SENSOR ASSY, and remove the P/H SENSOR ASSY.

  • Page 198: Ohp Sensor (Pl4.4.25) Removal

    EPSON AcuLaser C8500 Revision C 3.2.8.20 OHP SENSOR (PL4.4.25) Removal 1. Pull out the MSI/REGI HIGH ASSY. 2. Remove the MSI/REGI HIGH ASSY. (See Section 3.2.8.1.) 3. Remove the MAIN P/H FRAME ASSY. (See Section 3.2.8.6.) 4. Remove the screw (gold, tapping, 8mm) securing the P/H SENSOR ASSY, and remove the P/H SENSOR ASSY.

  • Page 199: Xerographics

    EPSON AcuLaser C8500 Revision C 3.2.9 Xerographics 3.2.9.1 DRUM CARTRIDGE (PL6.1.10) Removal 1. Open the FRONT COVER ASSY. 2. Turn the TENSION LEVER to the release position and separate the IBT BELT ASSY and DRUM CARTRIDGE. NOTE: Be careful not to touch the surface of the drum when performing the following.

  • Page 200: Waste Toner Box (Pl6.1.12) Removal

    EPSON AcuLaser C8500 Revision C 3.2.9.2 WASTE TONER BOX (PL6.1.12) Removal 1. Open the FRONT COVER ASSY. NOTE: After removing, be sure to lay the WASTE TONER BOX in its horizontal position in a safe place. 2. Lift the waste tone box hook lever and remove the WASTE TONER BOX by pulling straight out.

  • Page 201: Ros Assy (Pl6.1.1) Removal

    EPSON AcuLaser C8500 Revision C 3.2.9.3 ROS ASSY (PL6.1.1) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 2. Remove the 8 screws (silver, w/collar, 6mm) securing the ROS COVER, and remove the ROS COVER. 3. Disconnect the 4 connectors (P/J121, P/J122, P/J124, P/J125) for the ROS ASSY.

  • Page 202: Adc Sensor Assy (Pl6.1.20) Removal

    EPSON AcuLaser C8500 Revision C 3.2.9.4 ADC SENSOR ASSY (PL6.1.20) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 2. Remove the DRUM CARTRIDGE. (See Section 3.2.9.1.) 3. Remove the TENSION LEVER. (See Section 3.2.11.1.) 4. Remove the INNER COVER ASSY. (See Section 3.2.5.5/Section 3.2.5.6/ Section 3.2.5.7.)

  • Page 203: Xl Rail Assy (Pl6.1.40) Removal

    EPSON AcuLaser C8500 Revision C 3.2.9.5 XL RAIL ASSY (PL6.1.40) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 2. Remove the DRUM CARTRIDGE. (See Section 3.2.9.1.) 3. Remove the ROS ASSY. (See Section 3.2.9.3.) 4. Disconnect the ERASE LAMP ASSY connector (P/J86) and TONER BOX HARNESS connector (P/J116).

  • Page 204: Waste Toner Sensor (Pl6.1.42) Removal

    EPSON AcuLaser C8500 Revision C 3.2.9.6 WASTE TONER SENSOR (PL6.1.42) Removal 3.2.9.7 TONER BOX SENSOR (PL6.1.43) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 2. Remove the DRUM CARTRIDGE. (See Section 3.2.9.1.) 2.

  • Page 205: Erase Lamp Assy (Pl6.1.30) Removal

    EPSON AcuLaser C8500 Revision C 3.2.9.8 ERASE LAMP ASSY (PL6.1.30) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 2. Remove the DRUM CARTRIDGE. (See Section 3.2.9.1.) 3. Remove the ROS ASSY. (See Section 3.2.9.3.) 4. Remove the XL RAIL ASSY. (See Section 3.2.9.5.) 5.

  • Page 206: Development

    EPSON AcuLaser C8500 Revision C 3.2.10 Development 3.2.10.1 Toner Cartridge (PL7.1.1, PL7.1.2, PL7.1.3, PL7.1.4) Removal NOTE: TONER CARTRIDGE Y, TONER CARTRIDGE M, TONER CARTRIDGE C and TONER CARTRIDGE BK are hereinafter referred to by the generic term “Toner Cartridge.” 1. Open the FRONT COVER ASSY.

  • Page 207: Developer Assy (Pl7.1.10, Pl7.1.20, Pl7.1.30, Pl7.1.40) Removal

    EPSON AcuLaser C8500 Revision C 3.2.10.2 DEVELOPER ASSY (PL7.1.10, PL7.1.20, PL7.1.30, PL7.1.40) Removal NOTE: DEVELOPER ASSY Y, DEVELOPER ASSY M, DEVELOPER ASSY 3. Remove the TENSION LEVER. (See Section 3.2.11.1.) C, and DEVELOPER ASSY BK are hereinafter referred to by the generic term “Developer Assy.”...
  • Page 208 EPSON AcuLaser C8500 Revision C 8. Turn the ROTARY FRAME ASSY and remove the screw (silver, M4, 22mm) securing the Developer Assy. Align with the hole in the front of the After mounting, be sure to make the adjustment as A D J U S T M E N T frame, insert a screwdriver into the hole, and remove the screw.

  • Page 209: Rotary Sensor (Pl7.2.22) Removal

    EPSON AcuLaser C8500 Revision C 3.2.10.3 ROTARY SENSOR (PL7.2.22) Removal 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 2. Free the harness by unhooking from the FAN DUCT. 3. Disconnect the DEVE. FAN connector (P/J82). 4. Remove the screw (silver, w/collar, 8mm) securing the FAN DUCT. Slide the FAN DUCT up, unhook from the frame, and remove the FAN DUCT together with the DEVE.

  • Page 210: Rotary Frame Assy (Pl7.2.2) Removal

    EPSON AcuLaser C8500 Revision C 3.2.10.4 ROTARY FRAME ASSY (PL7.2.2) Removal 22. Remove the ROTARY KNOB ASSY with a screwdriver, etc. 1. Remove the FRONT COVER ASSY. (See Section 3.2.5.1.) 2. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 3. Remove the DRUM CARTRIDGE. (See Section 3.2.9.1.) 4.
  • Page 211 EPSON AcuLaser C8500 Revision C 23. Remove the E-ring securing the rear of the ROTARY FRAME ASSY and remove the ROTARY REAR BEARING. NOTE: Keep the front shaft of the ROTARY FRAME ASSY from falling from the printer frame while performing the following step by leaving the front of the ROTARY FRAME ASSY supported.

  • Page 212: Cartridge Sensor (Pl7.2.26) Removal

    EPSON AcuLaser C8500 Revision C 3.2.10.5 CARTRIDGE SENSOR (PL7.2.26) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 2. Disconnect the CARTRIDGE SENSOR connector (P/J87) and FRONT COVER SWITCH L connector (P/197), and free the harness by disconnecting from the CART. SENSOR PLATE.

  • Page 213: Ibt

    EPSON AcuLaser C8500 Revision C 3.2.11 IBT 3.2.11.1 TENSION LEVER (PL8.1.21) Removal 1. Open the FRONT COVER ASSY. 2. Turn the lever to the tension release position. Remove the screw (Black, w/ washer, 12mm) securing the TENSION LEVER. 3. Pull out the TENSION LEVER and remove.

  • Page 214: Transfer High Assy (Pl8.1.20) Removal

    EPSON AcuLaser C8500 Revision C 3.2.11.2 TRANSFER HIGH ASSY (PL8.1.20) Removal 1. Remove the DRUM CARTRIDGE. (See Section 3.2.9.1.) 2. Remove the TENSION LEVER. (See Section 3.2.11.1.) 3. Remove the IBT INNER COVER ASSY. (See Section 3.2.5.6.) 4. Remove the FUSER ASSY. (See Section 3.2.12.1.) 5.

  • Page 215: Belt Cleaner Assy (Pl8.1.23) Removal

    EPSON AcuLaser C8500 Revision C 3.2.11.3 BELT CLEANER ASSY (PL8.1.23) Removal 1. Remove the FUSER ASSY. (See Section 3.2.12.1.) NOTE: Toner may spill from the BELT CLEANER ASSY while performing the following. You should therefore spread paper on the frame below the BELT CLEANER ASSY, and be careful not to spill toner while performing the work.

  • Page 216: 2Nd Btr Assy (Pl8.1.22) Removal

    EPSON AcuLaser C8500 Revision C 3.2.11.4 2ND BTR ASSY (PL8.1.22) Removal 1. Remove the FUSER ASSY. (See Section 3.2.12.1.) 2. Remove the BELT CLEANER ASSY. (See Section 3.2.11.3.) NOTE: Be sure not to touch the IBT ASSY or the roller of the 2ND BTR ASSY, or allow the roller of the 2ND BTR ASSY to come in contact with any other parts while performing the following.

  • Page 217: 2Nd Btr Cam Assy (Pl8.1.1) Removal

    EPSON AcuLaser C8500 Revision C 3.2.11.5 2ND BTR CAM ASSY (PL8.1.1) Removal 10. Remove the 2ND BTR ASSY. (See Section 3.2.11.4.) 11. Remove the BTR CAM CLUTCH. (See Section 3.2.11.9.) 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 12. Remove the HVPS. (See Section 3.2.16.2.) 2.

  • Page 218: Auger High Assy (Pl8.1.6) Removal

    EPSON AcuLaser C8500 Revision C 3.2.11.6 AUGER HIGH ASSY (PL8.1.6) Removal 23. Remove the screw (silver, w/collar, 8mm) securing the AUGER HIGH ASSY inside the printer (upper side). 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 24. Free the harness by removing from the clamp of the P/H DRIVE ASSY.

  • Page 219: Ibt Belt Assy (Pl8.2.2) Removal

    EPSON AcuLaser C8500 Revision C 3.2.11.7 IBT BELT ASSY (PL8.2.2) Removal 1. Remove the DRUM CARTRIDGE. (See Section 3.2.9.1.) 2. Remove the TENSION LEVER. (See Section 3.2.11.1.) 3. Remove the IBT INNER COVER ASSY. (See Section 3.2.5.6.) 4. Remove the FUSER ASSY. (See Section 3.2.12.1.) 5.
  • Page 220 EPSON AcuLaser C8500 Revision C 15. Push in the metal cams on rear side of the TRANSFER ASSY, and insert one of the 4 screws securing the RAIL into the hole on the side, and lock the metal cam. 16. Push in the metal cams on front side of the TRANSFER ASSY, and insert one of the other screws securing the RAIL into the hole on the side, and lock the metal cam.

  • Page 221: Tr0 Sensor (Pl8.2.33) Removal

    EPSON AcuLaser C8500 Revision C 3.2.11.8 TR0 SENSOR (PL8.2.33) Removal 3.2.11.9 BTR CAM CLUTCH (PL8.3.4) Removal 1. Remove the DRUM CARTRIDGE. (See Section 3.2.9.1.) 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 2. Remove the TENSION LEVER. (See Section 3.2.11.1.) 2.

  • Page 222: Fusing

    EPSON AcuLaser C8500 Revision C 3.2.12 Fusing 3.2.12.1 FUSER ASSY (PL9.1.1) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Remove the FRONT MID COVER, let loose fully the drop preventing screw. 3. Pull out the FUSER ASSY, and remove by lifting diagonally.

  • Page 223: Main Fuser Assy (Pl9.1.2) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.2 MAIN FUSER ASSY (PL9.1.2) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Pull out the FUSER ASSY. 3. Disconnect the 2 connectors (P/J72B, P/J79) of the MAIN FUSER ASSY. 4. Remove the 3 screws (gold, w/washer, 8mm) securing the MAIN FUSER ASSY, Remove the MAIN FUSER ASSY.

  • Page 224: Upper Guide Assy (Pl9.2.20) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.3 UPPER GUIDE ASSY (PL9.2.20) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Pull out the FUSER ASSY. 3. Remove the 2 screws (silver, 6mm) securing the UPPER GUIDE ASSY, and remove the UPPER GUIDE ASSY.

  • Page 225: Fuser Upper Assy (Pl9.2.30) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.4 FUSER UPPER ASSY (PL9.2.30) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Pull out the FUSER ASSY. 3. Remove the MAIN FUSER ASSY. (See Section 3.2.12.2.) 4. Remove the UPPER GUIDE ASSY. (See Section 3.2.12.3.) 5.

  • Page 226: H/R Heater (Pl9.2.37) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.5 H/R HEATER (PL9.2.37) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Pull out the FUSER ASSY. 3. Remove the MAIN FUSER ASSY. (See Section 3.2.12.2.) 4. Remove the UPPER GUIDE ASSY. (See Section 3.2.12.3.) 5.

  • Page 227: P/R Heater (Pl9.2.38) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.6 P/R HEATER (PL9.2.38) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Pull out the FUSER ASSY. 3. Remove the MAIN FUSER ASSY. (See Section 3.2.12.2.) 4. Remove the UPPER GUIDE ASSY. (See Section 3.2.12.3.) 5.

  • Page 228: Lower Guide Assy (Pl9.2.13) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.7 LOWER GUIDE ASSY (PL9.2.13) Removal 3.2.12.8 FUSER EXIT SENSOR-1 (PL9.2.3) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Pull out the FUSER ASSY.

  • Page 229: Fuser Exit Sensor-2 (Pl9.2.4) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.9 FUSER EXIT SENSOR-2 (PL9.2.4) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Pull out the FUSER ASSY. 3. Remove the MAIN FUSER ASSY. (See Section 3.2.12.2.) 4. Remove the UPPER GUIDE ASSY. (See Section 3.2.12.3.) 5.

  • Page 230: Heat Roll (Pl9.2.25) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.10 HEAT ROLL (PL9.2.25) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Pull out the FUSER ASSY. 3. Remove the MAIN FUSER ASSY. (See Section 3.2.12.2.) 4. Remove the UPPER GUIDE ASSY. (See Section 3.2.12.3.) 5.

  • Page 231: Pressure Roll (Pl9.2.10) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.11 PRESSURE ROLL (PL9.2.10) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Pull out the FUSER ASSY. (See Section 3.2.12.1.) 3. Remove the MAIN FUSER ASSY. (See Section 3.2.12.2.) 4. Remove the UPPER GUIDE ASSY. (See Section 3.2.12.3.) 5.

  • Page 232: Temp. Sensor Assy (Pl9.2.6) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.12 TEMP. SENSOR ASSY (PL9.2.6) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Pull out the FUSER ASSY. (See Section 3.2.12.1.) 3. Remove the MAIN FUSER ASSY. (See Section 3.2.12.2.) 4. Remove the UPPER GUIDE ASSY. (See Section 3.2.12.3.) 5.

  • Page 233: Exchange Chute (Pl9.3.17) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.13 EXCHANGE CHUTE (PL9.3.17) Removal NOTE: Be careful not to damage the front/rear hinges of the exchange cute while performing the following. 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 7. Remove the EXCHANGE CHUTE by pulling straight out from the right 2.

  • Page 234: Exchange Solenoid (Pl9.3.22) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.14 EXCHANGE SOLENOID (PL9.3.22) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Pull out the FUSER ASSY. (See Section 3.2.12.1.) 3. Remove the MAIN FUSER ASSY. (See Section 3.2.12.2.) 4. Remove the EXCHANGE CHUTE. (See Section 3.2.12.13.) NOTE: The FUSER REAR RAIL and FUSER TRAY ASSY are connected by a harness.

  • Page 235: Cleaner Cam Solenoid (Pl9.4.24) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.15 CLEANER CAM SOLENOID (PL9.4.24) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Pull out the FUSER ASSY. (See Section 3.2.12.1.) 3. Remove the MAIN FUSER ASSY. (See Section 3.2.12.2.) NOTE: The FUSER REAR RAIL and FUSER TRAY ASSY are connected by a harness.

  • Page 236: Cleaner Cam Assy (Pl9.4.25) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.16 CLEANER CAM ASSY (PL9.4.25) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Remove the FUSER ASSY. (See Section 3.2.12.1.) 3. Remove the MAIN FUSER ASSY. (See Section 3.2.12.2.) 4. Remove the CLEANER CAM SOLENOID. (See Section 3.2.12.15.) 5.

  • Page 237: Exit-1 Roll Assy (Pl9.3.14) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.17 EXIT-1 ROLL ASSY (PL9.3.14) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Remove the FUSER ASSY. (See Section 3.2.12.1.) 3. Remove the MAIN FUSER ASSY. (See Section 3.2.12.2.) 4. Remove the E-ring securing the FUSER KNOB and FUSER KNOB GEAR.

  • Page 238: Fuser In Sensor (Pl9.4.4) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.18 FUSER IN SENSOR (PL9.4.4) Removal 1. Remove the FUSER ASSY. (See Section 3.2.12.1.) 2. Remove the 2 screws securing the HORIZONTAL CHUTE (gold, tapping, 10mm). Lift and remove the HORIZONTAL CHUTE together with the FUSER PAPER GUIDE.

  • Page 239: Fuser Chute Fan (Pl9.4.10) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.19 FUSER CHUTE FAN (PL9.4.10) Removal 1. Remove the FUSER ASSY. (See Section 3.2.12.1.) 2. Remove the 2 screws securing the HORIZONTAL CHUTE (gold, tapping, 10mm). Lift and remove the HORIZONTAL CHUTE together with the FUSER PAPER ASSY 3.

  • Page 240: Fuser Baffle Assy (Pl9.2.41) Removal

    EPSON AcuLaser C8500 Revision C 3.2.12.20 FUSER BAFFLE ASSY (PL9.2.41) Removal 1. Remove the EXIT TRAY ASSY. (See Section 3.2.13.1.) 2. Pull out the FUSER ASSY. (See Section 3.2.12.1.) 3. Remove the MAIN FUSER ASSY. (See Section 3.2.12.2.) 4. Remove the UPPER GUIDE ASSY. (See Section 3.2.12.3.) 5.

  • Page 241: Exit Tray Assy (Pl10.1.10) Removal

    EPSON AcuLaser C8500 Revision C 3.2.13.1 EXIT TRAY ASSY (PL10.1.10) Removal 3.2.13.2 EXIT UPPER ASSY (PL10.1.2) Removal 1. Bend the rear hinge of the EXIT TRAY ASSY inward, remove the boss 1. Open the EXIT UPPER ASSY. from the FUSER TRAY, remove the front hinge, and remove the EXIT NOTE: Be careful not to damage the hinges of the EXIT UPPER ASSY when TRAY ASSY.

  • Page 242: Exit Lower Assy (Pl10.1.1) Removal

    EPSON AcuLaser C8500 Revision C 3.2.13.3 EXIT LOWER ASSY (PL10.1.1) Removal 3.2.13.4 EXIT-2 ROLL ASSY (PL10.2.5) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 2. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 2.

  • Page 243: Roll Assy (Pl10.2.6) Removal

    EPSON AcuLaser C8500 Revision C 3.2.13.5 EXIT-3 ROLL ASSY (PL10.2.6) Removal 3.2.13.6 FUSER FAN-1 (PL10.2.15) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 2. Remove the 2 front/rear E-rings securing the EXIT-3 ROLL ASSY.

  • Page 244: Top Exit Sensor (Pl10.2.12) Removal

    EPSON AcuLaser C8500 Revision C 3.2.13.7 TOP EXIT SENSOR (PL10.2.12) Removal 3.2.13.8 EXIT CHUTE SWITCH (PL10.2.13) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 2. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 2.

  • Page 245: P/H Drive Assy (Pl11.1.1) Removal

    EPSON AcuLaser C8500 Revision C 3.2.14.1 P/H DRIVE ASSY (PL11.1.1) Removal 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 2. Remove the HVPS. (See Section 3.2.16.2.) 3. Remove the DRIVE MOTOR PWB. (See Section 3.2.14.5.) 4. Remove the P/H MOTOR ASSY. (See Section 3.2.14.4.) 5.

  • Page 246: Fuser Drive Assy (Pl11.1.2) Removal

    EPSON AcuLaser C8500 Revision C 3.2.14.2 FUSER DRIVE ASSY (PL11.1.2) Removal 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 2. Remove the FUSER ASSY. (See Section 3.2.12.1.) 3. Remove the FUSER MOTOR ASSY. (See Section 3.2.14.3.) 4. Remove the LVPS. (See Section 3.2.16.1.) 5.

  • Page 247: Fuser Motor Assy (Pl11.1.4) Removal

    EPSON AcuLaser C8500 Revision C 3.2.14.3 FUSER MOTOR ASSY (PL11.1.4) Removal 3.2.14.4 P/H MOTOR ASSY (Pl11.1.5) Removal 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 2. Disconnect the connector (P/J47) from the FUSER MOTOR ASSY.

  • Page 248: Drive Motor Pwb (Pl11.1.6) Removal

    EPSON AcuLaser C8500 Revision C 3.2.14.5 DRIVE MOTOR PWB (PL11.1.6) Removal 3.2.14.6 PROCESS DRIVE ASSY (PL11.1.10) Removal 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 2. Disconnect the 4 connectors (CN1, P/J48, P/J49, P/J50) of the DRIVE 2.

  • Page 249: Rotary Motor Assy (Pl11.1.20) Removal

    EPSON AcuLaser C8500 Revision C 3.2.14.7 ROTARY MOTOR ASSY (PL11.1.20) Removal 3.2.14.8 ROTARY MOTOR DRIVE PWB (PL11.1.21) Removal 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 2. Disconnect the connector (P/J247) of the ROTARY MOTOR ASSY.

  • Page 250: Dispense Clutch Assy (Pl11.1.22) Removal

    EPSON AcuLaser C8500 Revision C 3.2.14.9 DISPENSE CLUTCH ASSY (PL11.1.22) Removal 3.2.14.10 DEVE. CLUTCH ASSY (PL11.1.23) Removal 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 2. Remove the FUSER MOTOR ASSY. (See Section 3.2.14.3.) 2.

  • Page 251: Frame

    EPSON AcuLaser C8500 Revision C 3.2.15 Frame 3.2.15.1 DEVE. TIE PLATE (PL12.1.3) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 2. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 3. Remove the DRUM CARTRIDGE. (See Section 3.2.9.1.) 4. Remove the TENSION LEVER. (See Section 3.2.11.1.) 5.

  • Page 252: Electrical

    EPSON AcuLaser C8500 Revision C 3.2.16 Electrical Be careful not to get the harness caught in the gears or 3.2.16.1 LVPS (PL13.1.1) Removal C H E C K P O I N T on sheet metal when mounting. 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) Be sure to hook the left hook securely on the frame when mounting.

  • Page 253: Hvps (Pl13.1.2) Removal

    EPSON AcuLaser C8500 Revision C 3.2.16.2 HVPS (PL13.1.2) Removal 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) C H E C K Be careful not to get the harness caught in the gears or on P O I N T 2.

  • Page 254: Top Cover Switch (Pl13.1.3) Removal

    EPSON AcuLaser C8500 Revision C 3.2.16.3 TOP COVER SWITCH (PL13.1.3) Removal 3.2.16.4 DEVE. FAN (PL13.1.5) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 1. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 2. Remove the REAR COVER ASSY. (See Section 3.2.5.8.) 2.

  • Page 255: Mcu Pwb (Pl13.2.1) Removal

    EPSON AcuLaser C8500 Revision C 3.2.16.5 MCU PWB (PL13.2.1) Removal When replacing the MCU PWB, mount the new MCU PWB C A U T I O N after removing the EEPROM(U2) housing the NVM DATA from the MCU PWB that is not replaced.

  • Page 256: Front Cover Switch R (Pl13.2.3) Removal

    EPSON AcuLaser C8500 Revision C 3.2.16.6 FRONT COVER SWITCH R (PL13.2.3) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 2. Remove the RIGHT COVER ASSY. (See Section 3.2.5.11.) 3. Remove the CONTROLLER PWB. (See Section 3.2.17.1.) 4. Remove the CONT. CHASSIS ASSY. (See Section 3.2.17.3.) 5.

  • Page 257: Front Cover Switch L (Pl13.2.4) Removal

    EPSON AcuLaser C8500 Revision C 3.2.16.7 FRONT COVER SWITCH L (PL13.2.4) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 2. Remove the DRUM CARTRIDGE. (See Section 3.2.9.1.) 3. Remove the TENSION LEVER. (See Section 3.2.11.1.) 4. Remove the INNER COVER ASSY. (See Section 3.2.5.5/Section 3.2.5.6/ Section 3.2.5.7.)

  • Page 258: Environment Sensor (Pl13.2.5) Removal

    EPSON AcuLaser C8500 Revision C 3.2.16.8 ENVIRONMENT SENSOR (PL13.2.5) Removal 1. Remove the MSI/REGI HIGH ASSY. (See Section 3.2.8.1.) 2. Disconnect the ENVIRONMENT SENSOR connector (P/J105), and free the harness by removing it from the clamp. NOTE: Be careful not to touch the IBT BELT ASSY surface while performing the following.

  • Page 259: Controller

    CONTROLLER PLATE ASSY. W A R N I N G Since the lithium battery is installed to the CONTROLLER PWB of AcuLaser C8500, be sure to pay attention to the following: Do not short-circuit the lithium battery. When mounting the lithium battery, be sure to set it in the correct direction paying attention to its polarity.
  • Page 260 EPSON AcuLaser C8500 Revision C Figure 3-126. CONTROLLER PWB Removal Disassembly/Assembly/Adjustment Disassembly/Assembly Procedures 3-108...

  • Page 261: Controller Fan (Pl14.1.2) Removal

    EPSON AcuLaser C8500 Revision C 3.2.17.2 CONTROLLER FAN (PL14.1.2) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 2. Remove the RIGHT COVER ASSY. (See Section 3.2.5.11.) 3. Disconnect the CONTROLLER FAN connector (P/J1). 4. Remove the 2 screws (gold, 20mm) securing the CONTROLLER FAN, and remove the CONTROLLER FAN.

  • Page 262: Cont. Chassis Assy (Pl14.1.1) Removal

    EPSON AcuLaser C8500 Revision C 3.2.17.3 CONT. CHASSIS ASSY (PL14.1.1) Removal 1. Remove the TOP COVER ASSY. (See Section 3.2.5.4.) 2. Remove the RIGHT COVER ASSY. (See Section 3.2.5.11.) 3. Remove the MSI/REGI HIGH ASSY. (See Section 3.2.8.1.) 4. Remove the CONTROLLER PWB. (See Section 3.2.17.1.) 5.

  • Page 263: Lithium Battery Removal

    EPSON AcuLaser C8500 Revision C 3.2.17.4 Lithium Battery Removal Before starting, be sure to turn the printer off and unplug Lithium Battery W A R N I N G the power cable from the AC power socket. When replacing the lithium battery with a new one, make sure the new one meets the specifications.

  • Page 264: Adjustment

    EPSON AcuLaser C8500 Revision C 3.3 Adjustment This section describes the adjustments necessary for the EPSON AcuLaser C8500. 3.3.1 NIP Pressure of the MAIN FUSER ASSY Make this adjustment to set fixing level to a proper level. The FUSE R section becomes extremely hot. Be careful not W A R N I N G to burn yourself when making the adjustment.

  • Page 265: Development

    EPSON AcuLaser C8500 Revision C 3.3.2 Development CONFIRMATION PROCEDURE] This adjustment must be performed when the DEVELOPER ASSY is replaced 1. Remove the TOP COVER. (See Section 3.2.5.4.) or the impulse banding problem occurs. 2. Remove the L/H INNER COVER. (See Section 3.2.5.5.) Table 3-2.
  • Page 266 EPSON AcuLaser C8500 Revision C 5. Release the ROTARY LATCH ASSY. Turn the DEVELOPER ASSY clockwise and lock the ROTARY LATCH ASSY in the notch of the ROTARY FRAME ASSY at the position where the tracking roll of the target DEVELOPER ASSY is on top.
  • Page 267 EPSON AcuLaser C8500 Revision C 9. Lift with your hand the lever of the ROTARY LATCH ASSY which prevents 10. Make sure the amount of position change with the mark made in step 7 of the Developer Assy from turning, and turn the ROTARY FRAME ASSY as this procedure are 3 - 5mm.
  • Page 268 EPSON AcuLaser C8500 Revision C ADJUSTMENT PROCEDURE Confirmation : Confirm the gap of the Drum and the Magnet Roll. Adjustment : Adjust the gap of the Drum and the Magnet Roll 11. Turn the target DEVELOPER ASSY clockwise to the location that you can see from the lower left hole , let loose the inside screw (black, w/collar, 8mm) of the gap adjustment plate.

  • Page 269: Chapter 4 Diagnostics

    C H A P T E R DIAGNOSTICS...

  • Page 270: Diagnostics By The Diagnostic Commander

    READY mode 4.1.1 Overview 5. Start a print movement by turning on Dip-Switch (S1). (continuous This printer, AcuLaser C8500 can perform a test print by using the off- print is done.) line CONTROLLER PWB. Test print using the jumper setting on MCU PWB (DIP SW): See Section 4.1.2 “Method of Printing Test Prints”.
  • Page 271 EPSON AcuLaser C8500 Revision C 6. To stop printing, turn off the Dip-Switch(S1) on the MCU PWB if it is present. (A device stops after a print during the treatment is discharged.) W A R N I N G Make sure that your hand does not touch the other elements when changing the Dip-Switch.

  • Page 272: Test Print Patterns

    EPSON AcuLaser C8500 Revision C 4.1.3 Test Print Patterns In a straight line extending in the laser beam scanning direction, a one dot line is printed at intervals of every 128 dots. On the back The test print is done in the following patterns that each color appears in edge of each color, the 128 dot interval may vary.

  • Page 273: Diagnostics Commander

    <Option Connector Connection> the diagnostics tool (Maintenance tool.) Only down load of FIRMWARE can do it by this composition. The diagnostics tools supplied by SEIKO EPSON are shown in the following table. Chapter 4 Diagnostics...

  • Page 274: Overview Of The Diagnostic Commander

    EPSON AcuLaser C8500 Revision C 4.2.1.3 Overview of the DIAG. PWB This circuit board is equipped with a connector with the MCU PWB, a connector with DIAG HARNESS, a connector with RS-232C cable (D- Sub 25 pin female and 2 D-Sub 9 pin females, 4 dip switches).

  • Page 275: Preparation

    EPSON AcuLaser C8500 Revision C 4.2.2 Preparation 4.2.2.2 Installation of the Diagnostics Commander [Procedure] 4.2.2.1 Personal Computer 1. Launch Windows 95, select “Set” from “Start menu,” and then Prepare a personal computer which supports the execution of the “Control Panels” from “Set.”...

  • Page 276: Uninstalling The Diagnostics Commander

    EPSON AcuLaser C8500 Revision C 4.2.2.3 Uninstalling the Diagnostics Commander 4.2.2.4 Connection of the diagnostics tools (MCU PWB) [Procedure] [Procedure] 1. Launch Windows 95, select “Set” from “Start menu,” and then 1. Remove a RIGHT COVER ASSY (Section 3.2.5.11 “RIGHT COVER “Control Panels”...

  • Page 277: Connection Of The Diagnostics Tools (Option Connector)

    EPSON AcuLaser C8500 Revision C 4.2.2.5 Connection of the diagnostics tools (Option 4.2.3 Commands / Statuses Connector) NOTE: Be careful with this connection because only FIRMWARE 4.2.3.1 Overview of Commands and Statuses download of MCU PWB can be done. Commands and statuses are data that are used for communications [Procedure] between the printer controller and MCU PWB.

  • Page 278: Data Format

    EPSON AcuLaser C8500 Revision C 4.2.3.2 Data Format 4.2.3.3 Categories of Commands / Statuses Each command and status are categorized into the following four groups according to the type of printer control. Paper, Media, and Output Paper feed method (location), type of paper, paper size setting /...

  • Page 279: Operating The Diagnostics Commander

    EPSON AcuLaser C8500 Revision C 4.2.4 Operating the Diagnostics Commander 4.2.4.1 Starting Up the Diagnostics Commander [Procedure] 1. Connect the Diag tool with the printer. 2. Turn ON the power supply of the printer. 3. Launch Windows 95, and select [Program (P)]-[Tsubaki Service Commander V*.**]-[TSCV*] from the “Start menu.”...

  • Page 280: Log Display

    EPSON AcuLaser C8500 Revision C 4.2.4.3 Log Display NOTE: Statuses which are not displayed in the [Status] column but are displayed in the [Log Window] are as follows. You can display the communications process between the Dialog IGNORED[41 XX(CMD) XX(REASON)] Commander and MCU PWB in the [Log Window].

  • Page 281: Manual] Tab Operation

    EPSON AcuLaser C8500 Revision C [Procedure] LOG WINDOW PROCEDURES 1. Connect DIAG TOOL with the printer, launch the diagnostics Moving the cursor to inside the [Log Window] and right-clicking displays commander. the [Log Clear], [Log Save], and [Log Window Close] buttons.
  • Page 282 EPSON AcuLaser C8500 Revision C NOTE: Double clicking displays the command code in the [Command] NOTE: To select the other commands without sending them, move the column, and also the parameter codes of the selected command cursor into the window for selecting parameters, click the right code if it has any having parameter codes.

  • Page 283: Auto] Tab Procedures

    EPSON AcuLaser C8500 Revision C 4.2.4.5 [Auto] Tab Procedures CREATING AN AUTO RUN FILE Auto Run File allows you to transmit consecutively 2 or more NOTE: You can make a file using an editor such as Memo Pad. commands. NOTE: Input all letters in ASCII.
  • Page 284 EPSON AcuLaser C8500 Revision C [SERVICE] TAB PROCEDURES PORT NUMBER With the [Service] tab lets you write specifications to the MCU PWB The port number of the personal computer can be specified with [Port EEPROM(NVM), set the password, read the Master, and read/initialize Number].
  • Page 285 EPSON AcuLaser C8500 Revision C MASTER READ SLAVE READ [Master Read] lets you read the contents of the [Master]. [Slave Read] lets you read the contents of the [Slave]. NOTE: If [Master Read] is executed when communications are not NOTE: If [Slave Read] is executed when communications are not established, the Diagnostics Commander will hang.
  • Page 286 EPSON AcuLaser C8500 Revision C SLAVE INITIALIZE W A R N I N G Never execute [Slave Initialize] unless instructed to by Cancel this manual. FLASH WRITE [Slave Initialize] lets you initialize the contents of the [Slave] (delete the contents.)
  • Page 287 EPSON AcuLaser C8500 Revision C 3. When a message window is displayed, click on the [OK] button. (Download program [f_w2_113.exe：TSUBAKI Flash Writer Ⅱ ] starts.) 7. Download is started. (Progress conditions are indicated under the [Down Load!] button.) NOTE: When “TSUBAKI Flash Writer II” starts, confirm the ROM version of MCU PWB, and judge Flash ROM or Mask ROM, it becomes “MCU ROM is not Flash type”...
  • Page 288 EPSON AcuLaser C8500 Revision C NOTE: Carry it out again from the beginning after you confirm connection condition and so on if a [Error] message is indicated. Exchange MCU PWB, and confirm it when even the practice of the re-occasion becomes a “Error” message.
  • Page 289 EPSON AcuLaser C8500 Revision C NOTE: Confirm the version of FIRMWARE in front of download after/ because the version of FIRMWARE can be confirmed by transmitting a command “E2” with Manual tab. Command : [E2] Status : [E2 XX XX XX] (“XXXXXX” is the version of FIRMWARE.)

  • Page 290: Diagnostics Execution

    EPSON AcuLaser C8500 Revision C 4.2.5 Diagnostics Execution 4.2.5.2 Diagnostics Types Diagnostics is a function that lets you diagnose problems. Including All 4.2.5.1 Diagnostics Execution Procedures Test Stop, there are 9 types of diagnostics as shown below. The diagnostics commander command transmission function lets you send the following commands to execute diagnostics.

  • Page 291: Test Print

    EPSON AcuLaser C8500 Revision C 4.2.5.3 Test Print NOTE: “Grid” in the above table is the same as Section 4.1.3 “Test Print Patterns”. This lets you set the parameter for the printer's internal test print. Table 4-6. Test Print EX) [Command]...

  • Page 292: Digital Input Test

    EPSON AcuLaser C8500 Revision C 4.2.5.4 Digital Input Test 4.2.5.5 Digital Input Test Device Code This lets you detect the High/Low level of switches and sensors that Table 4-8. Digital Input Test Device Code have digital signals. Digital Input Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ] Table 4-7.
  • Page 293 EPSON AcuLaser C8500 Revision C Table 4-8. Digital Input Test Device Code Table 4-8. Digital Input Test Device Code Digital Input Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ] Digital Input Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]...
  • Page 294 EPSON AcuLaser C8500 Revision C Table 4-8. Digital Input Test Device Code Table 4-8. Digital Input Test Device Code Digital Input Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ] Digital Input Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]...
  • Page 295 EPSON AcuLaser C8500 Revision C Table 4-8. Digital Input Test Device Code Table 4-8. Digital Input Test Device Code Digital Input Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ] Digital Input Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]...
  • Page 296 EPSON AcuLaser C8500 Revision C Table 4-8. Digital Input Test Device Code Table 4-8. Digital Input Test Device Code Digital Input Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ] Digital Input Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]...
  • Page 297 EPSON AcuLaser C8500 Revision C Table 4-8. Digital Input Test Device Code Table 4-8. Digital Input Test Device Code Digital Input Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ] Digital Input Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]...

  • Page 298: Digital Output Test

    EPSON AcuLaser C8500 Revision C 4.2.5.6 Digital Output Test During high voltage output, never touch parts with W A R N I N G This lets you turn ON/OFF each component that is operated by a high voltage output or energized with high voltage.

  • Page 299: Digital Output Test Device Code

    EPSON AcuLaser C8500 Revision C 4.2.5.7 Digital Output Test Device Code NOTE: Never turn ON the 1ST BTR with the [PROCESS DRIVE ASSY] OFF. Otherwise the IBT BELT ASSY may be damaged. NOTE: Never turn ON the 2ND BTR with the [PROCESS DRIVE ASSY] W A R N I N G For check methods with <WARNING>...
  • Page 300 EPSON AcuLaser C8500 Revision C Table 4-10. Digital Output Test Device Code Table 4-10. Digital Output Test Device Code Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ] Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]...
  • Page 301 EPSON AcuLaser C8500 Revision C Table 4-10. Digital Output Test Device Code Table 4-10. Digital Output Test Device Code Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ] Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]...
  • Page 302 EPSON AcuLaser C8500 Revision C Table 4-10. Digital Output Test Device Code Table 4-10. Digital Output Test Device Code Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ] Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]...
  • Page 303 EPSON AcuLaser C8500 Revision C Table 4-10. Digital Output Test Device Code Table 4-10. Digital Output Test Device Code Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ] Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]...
  • Page 304 EPSON AcuLaser C8500 Revision C Table 4-10. Digital Output Test Device Code Table 4-10. Digital Output Test Device Code Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ] Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]...
  • Page 305 EPSON AcuLaser C8500 Revision C Table 4-10. Digital Output Test Device Code Table 4-10. Digital Output Test Device Code Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ] Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]...
  • Page 306 EPSON AcuLaser C8500 Revision C Table 4-10. Digital Output Test Device Code Table 4-10. Digital Output Test Device Code Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ] Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]...
  • Page 307 EPSON AcuLaser C8500 Revision C Table 4-10. Digital Output Test Device Code Table 4-10. Digital Output Test Device Code Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ] Digital Output Test [DIAGSTART : [90 02 XX] , DIAGSTOP : [91 02 XX] ]...

  • Page 308: Analog Input Test

    EPSON AcuLaser C8500 Revision C 4.2.5.8 Analog Input Test EX) [Command] This lets you detect the signal level of sensors and output monitors that 91 03 01 have analog signals. ADC_SRN NOTE: Do use this without this manual or the wise instructed.

  • Page 309: Analog Input Test Device Code

    EPSON AcuLaser C8500 Revision C 4.2.5.9 Analog Input Test Device Code Table 4-12. Analog Input Test Device Code Analog Input Test [DIAGSTAR : [90 03 XX] , DIAGSTOP : Unnecessary] Code Functional Item Name (Hex) Check Signal Check Method W A R N I N G For items with <WARNING>...
  • Page 310 EPSON AcuLaser C8500 Revision C Table 4-12. Analog Input Test Device Code Analog Input Test [DIAGSTAR : [90 03 XX] , DIAGSTOP : Unnecessary] Code Functional Item Name (Hex) Check Signal Check Method Data Range OPT_FEEDER_P AUX SIZE SWITCH Do ON/ OFF of four Paper...

  • Page 311: Analog Output Test

    EPSON AcuLaser C8500 Revision C 4.2.5.10 Analog Output Test EX) [Command] This lets you turn ON/OFF with specified data components operated by analog signals. 90 04 02 01 DATA(011F) NOTE: Do use this without this manual or otherwise instructed. BCR_DC_OUT Table 4-13.

  • Page 312: Analog Output Test Device Code

    EPSON AcuLaser C8500 Revision C 4.2.5.11 Analog Output Test Device Code During high voltage output, never touch parts with high W A R N I N G voltage output or energized with high voltage. W A R N I N G For check methods with <WARNING>...
  • Page 313 EPSON AcuLaser C8500 Revision C Analog Output Test Device Code Analog Output Test Device Code Table 4-14. Table 4-14. Analog Output Test [DIAGSTAR : [90 04 XX] , DIAGSTOP : 91 04 XX XX] Analog Output Test [DIAGSTAR : [90 04 XX] , DIAGSTOP : 91 04 XX XX]...

  • Page 314: Eeprom Read

    EPSON AcuLaser C8500 Revision C 4.2.5.12 EEPROM Read This lets you read and check the data stored in the MCU PWB EX) [Command] EEPROM(NVM). 90 01 0E 07 Table 4-15. EEPROM Read Parameter NVM Number 748(2ECh): DIAGON command: [75] DIAGOFF command: [76]...
  • Page 315 EPSON AcuLaser C8500 Revision C [720(02D0h)] : Counter C for the WASTE TONER BOX FULL [764(02FCh)] : Count accumulation value for the DRUM detection. CARTRIDGE Life detection. [724(02D4h)] : The whole image count accumulation value of Caution: When a CRUM function is endowed, don't do the thing the device.
  • Page 316 EPSON AcuLaser C8500 Revision C [972(03CCh)] : The total dispense accumulation time of TONER CARTRIDGE C. [974(03CEh)] : The total dispense accumulation time of TONER CARTRIDGE BK. [976(03D0h)] : The total dispense accumulation time of TONER CARTRIDGE Y. [978(03D2h)] : The total dispense accumulation time of TONER CARTRIDGE M.

  • Page 317: Eeprom Write

    EPSON AcuLaser C8500 Revision C 4.2.5.13 EEPROM Write NOTE: When MCU PWB is exchanged, though it is being made a principle that exchange of EEPROM (NVM : U2) is done, begin This lets you write and change data stored in the MCU PWB to read the following NVM number from MCU PWB before the EEPROM(NVM).
  • Page 318 EPSON AcuLaser C8500 Revision C [720(02D0h)] : Counter C for the WASTE TONER BOX FULL [764(02FCh)] : Count accumulation value for the DRUM detection. CARTRIDGE Life detection. [724(02D4h)] : The whole image count accumulation value of Caution: When a CRUM function is endowed, don't do the thing the device.
  • Page 319 EPSON AcuLaser C8500 Revision C [972(03CCh)] : The total dispense accumulation time of TONER When replacing DEVELOPER ASSY C with new one : CARTRIDGE C. [734(02DEh)],[800(0320h)] [974(03CEh)] : The total dispense accumulation time of TONER When replacing DEVELOPER ASSY BK with new one : CARTRIDGE BK.

  • Page 320: Eeprom Initialize

    EPSON AcuLaser C8500 Revision C 4.2.5.14 EEPROM Initialize EX) [Command] The lets you initialize the MCU PWB EEPROM(NVM:U2). 91 07 NOTE: Never initialize values not specified in this manual. NOTE: If values not specified in this manual are accidentally initialized,...

  • Page 321: Nvm List

    EPSON AcuLaser C8500 Revision C 4.2.5.15 NVM List Table 4-18. NVM List EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)]) NOTE: Never write to NVM numbers not listed in the following table as they are system area values.
  • Page 322 EPSON AcuLaser C8500 Revision C Table 4-18. NVM List Table 4-18. NVM List EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)]) EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)])
  • Page 323 EPSON AcuLaser C8500 Revision C Table 4-18. NVM List Table 4-18. NVM List EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)]) EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)])
  • Page 324 EPSON AcuLaser C8500 Revision C Table 4-18. NVM List Table 4-18. NVM List EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)]) EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)])
  • Page 325 EPSON AcuLaser C8500 Revision C Table 4-18. NVM List Table 4-18. NVM List EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)]) EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)])
  • Page 326 EPSON AcuLaser C8500 Revision C Table 4-18. NVM List Table 4-18. NVM List EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)]) EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)])
  • Page 327 EPSON AcuLaser C8500 Revision C Table 4-18. NVM List Table 4-18. NVM List EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)]) EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)])
  • Page 328 EPSON AcuLaser C8500 Revision C Table 4-18. NVM List Table 4-18. NVM List EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)]) EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)])
  • Page 329 EPSON AcuLaser C8500 Revision C Table 4-18. NVM List Table 4-18. NVM List EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)]) EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)])
  • Page 330 EPSON AcuLaser C8500 Revision C Table 4-18. NVM List Table 4-18. NVM List EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)]) EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)])
  • Page 331 EPSON AcuLaser C8500 Revision C Table 4-18. NVM List Table 4-18. NVM List EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)]) EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)])
  • Page 332 EPSON AcuLaser C8500 Revision C Table 4-18. NVM List Table 4-18. NVM List EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)]) EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)])
  • Page 333 EPSON AcuLaser C8500 Revision C Table 4-18. NVM List Table 4-18. NVM List EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)]) EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)])
  • Page 334 EPSON AcuLaser C8500 Revision C Table 4-18. NVM List EEPROM Read([90 05 XX XX]), EEPROM Write([90 06 XX XX YY XX (XX XXXX)]) Function Range Can/ (Hex) Cannot NVM No. Data Default (Hex) Byte Description of Data Units (Hex) All TONER CARTRIDGE M...

  • Page 335: Count Accumulation Value Read/Write

    EPSON AcuLaser C8500 Revision C 4.2.6 Count Accumulation Value Read/Write Reading from EEPROM (NVM) of MCU PWB and writing to EEPROM (NVM) can be done in the same way as [EEPROM Read/Write] of the Section 4.2.5 “Diagnostics Execution” by the command/status of [Parameter Control] by the various accumulation value of the count.

  • Page 336: Read

    EPSON AcuLaser C8500 Revision C 4.2.6.1 Read Table 4-19. Count Accumulation Value - Read Table 4-19. Count Accumulation Value - Read Item Command Note TRANSFER ASSY [D0 14] In the same way as the NVM number Item Command Note 760(02F8)

  • Page 337: Write

    EPSON AcuLaser C8500 Revision C 4.2.6.2 Write Table 4-20. Count Accumulation Value - Write Table 4-20. Count Accumulation Value - Write Item Command Note TRANSFER ASSY [80 14 V1 V2 V3 V4] When replacing with new Item Command Note TRANSFER ASSY, do counter...

  • Page 338: Command/Status List

    EPSON AcuLaser C8500 Revision C 4.2.7 Command/Status List Table 4-21. Command/Status - Paper, Media & Output Control Name Command/Status Explanation USIZESET 64, TRAY, SIZE, Setting of undefined 4.2.7.1 Paper, Media & Output Control FSIZEU paper size Command/Status , FSIZEL, SSIZEU,...
  • Page 339 EPSON AcuLaser C8500 Revision C Parameter Code Explanation INFO_T/INFO_D PARAMETER NOTE: Only a main parameter code is explained here. Refer to NOTE: As for the following parameter, contents are prescribed in the Bit [Interface spec.] for the parameter code which mention is not in, unit.
  • Page 340 EPSON AcuLaser C8500 Revision C TRAY/SIZE/MEDIA/DEST/DOPT PARAMETER See the following table below. Table 4-24. TRAY/ SIZE/ MEDIA/ DEST/ DOPT Parameter TRAY SIZE MEDIA DEST DOPT Data Paper Size Setting Detection at Paper Tray Enable Enable (Hex) Feeder Unit Paper Size...
  • Page 341 EPSON AcuLaser C8500 Revision C Table 4-24. TRAY/ SIZE/ MEDIA/ DEST/ DOPT Parameter TRAY SIZE MEDIA DEST DOPT Data Paper Size Setting Detection at Paper Tray Enable Enable (Hex) Feeder Unit Paper Size Paper Quality Discharge Location Sorter Disable Disable Folio(SEF) LEGAL14”(SEF...

  • Page 342: Printing/Status Control

    EPSON AcuLaser C8500 Revision C 4.2.7.2 Printing/Status Control Table 4-25. Command/Status Control Name Command/Status Explanation Command/Status PMSTT Scanner Motor With distinction column [C/S] of the following command/status, rotation start request make a command [C] and a status [S], show [command/status code]...
  • Page 343 EPSON AcuLaser C8500 Revision C Table 4-25. Command/Status Control Name Command/Status Explanation SSDTCH Some/nothing detection C1, STSDTCH1, STSDTCH2 information about the consumable parts, the paper tray, and so on SSTRAY Error information on status of paper tray C2, STSTRAY SSCRUM...
  • Page 344 EPSON AcuLaser C8500 Revision C Parameter Code Explanation Table 4-27. SSENG Status Parameter SSENG Status Code: [C0] NOTE: Only the main parameter code is explained here. Data (Bit) STSMODE STSMODE2 STSCALL SLPON COMMAND PARAMETER PRINT Mode Life over (SSLIFE command:[C6])
  • Page 345 EPSON AcuLaser C8500 Revision C SSCASSETTE/SSCRUM STATUS PARAMETER SSJAM STATUS PARAMETER NOTE: The parameters below are stipulated in Bit units NOTE: The parameters below are stipulated in Bit units Table 4-29. SSCASSETTE/SSCRUM Status Parameter Table 4-30. SSJAM Status Parameter SSTRAY Status Code: [C2]...
  • Page 346 EPSON AcuLaser C8500 Revision C SSHW STATUS PARAMETER SSLIFE STATUS PARAMETER NOTE: The parameters below are stipulated in Bit units NOTE: The parameters below are stipulated in Bit units. Table 4-31. SSHW Status Parameter Table 4-32. SSLIFE Status Parameter SSHW Status Code: [C5]...
  • Page 347 EPSON AcuLaser C8500 Revision C Table 4-34. SSWARN Status Parameter SSOPEN STATUS PARAMETER SSWARNStatus Code: [C8] NOTE: The parameters below are stipulated in Bit units. Data (Bit) STSWARN1 STSWARN2 STSWARN3 Table 4-33. SSOPEN Status Parameter BIN error DEVELOPER ASSY MSI lift up error...

  • Page 348: Parameter Control

    EPSON AcuLaser C8500 Revision C 4.2.7.3 Parameter Control Table 4-35. Command/Status-Parameter Control Name Command/Status Explanation Don’t use without indicate in this manual except for C A U T I O N LIFCNTR D0, LIFE Read data of life counter [LIFCNTSET (80)], [CTLSET (85)], [LIFCNTR (D0)],...
  • Page 349 EPSON AcuLaser C8500 Revision C Parameter Code Explanation Table 4-36. LIFE/TIM/CTL/STC Parameter Code NOTE: Only a main parameter code is explained here. Data LIFE (Control Value/ Set Refer to [Interface spec.] for the parameter code which mention (Hex) (Life Counters)
  • Page 350 EPSON AcuLaser C8500 Revision C Table 4-36. LIFE/TIM/CTL/STC Parameter Code Data LIFE (Control Value/ Set (Hex) (Life Counters) Point) (Statistical Counters) Side registration adjustment (MSI : about 0.17mm unit) Side registration adjustment (Duplex : about 0.17mm unit) Enable (O)/ D isable...

  • Page 351: Diagnostics Control

    EPSON AcuLaser C8500 Revision C 4.2.7.4 Diagnostics Control Parameter Code Explanation Command/Status REASON/OPTION PARAMETER CODE With distinction column [C/S] of the following command/status, make a NOTE: The parameters below are stipulated in Bit units. command [C] and a status [S], show [command/status code] + [parameter code] in the command/status column and a command/status code of that will be shown soon in 16.

  • Page 352: Error / Status Code

    EPSON AcuLaser C8500 Revision C 4.2.8 Error / Status Code The statuses [SSENG], [SSCONS], [SSTRAY], [SSJAM], [SSHW], [SSLIFE], [SSOPEN], [SSWARN] in the Command/Status category [Printing/Status Control] let you find out the error/status codes of the printer. A detection error in Bit units is set for each status parameter.

  • Page 353: Chapter 5 Troubleshooting

    C H A P T E R TROUBLESHOOTING...

  • Page 354: Overview

    EPSON AcuLaser C8500 Revision C 5.1.2 Preliminary Checks 5.1 Overview Check the following before troubleshooting: 1. Make sure power source voltage is within specifications. (Measure After confirming the problem and carrying out preliminary checks, you voltage from the electric outlet.) should take advantage of FIP (Fault Isolation Procedure), and the information in “Chapter 3: DIAG Operation,”...

  • Page 355: Precautions When Performing Work

    EPSON AcuLaser C8500 Revision C 5.1.3 1.3 Precautions When Performing Work 4. When outputting high voltage using the DIAG tool, etc., make sure all the covers are mounted unless specifically instructed otherwise. 1. Be sure to unplug the POWER CORD except when necessary when performing work.

  • Page 356: Self-Diagnostic Function By Lcd Message

    EPSON AcuLaser C8500 Revision C 5.1.4 Self-Diagnostic Function by LCD Message Table 5-1. LCD Message List LED Description Message Category Refer to: This printer is equipped with a self-diagnostic function. If the printer On Line Continue detects an error, it indicates the error information with the LED lamps on...
  • Page 357 EPSON AcuLaser C8500 Revision C Table 5-1. LCD Message List Table 5-1. LCD Message List LED Description LED Description Message Category Refer to: Message Category Refer to: On Line Continue On Line Continue Paper Out sss Error Page 5-12 Worn Photoconductor...
  • Page 358 EPSON AcuLaser C8500 Revision C Face down Cassette Front Cover Unit C Unit G Paper Tray Lower Cassette 1 (LC 1) Cover D Lower Cassette 2 (LC 2) Lower Cassette Cover E 3 (LC 3) Large Capacity Paper Unit Cover A...

  • Page 359: Status Message

    EPSON AcuLaser C8500 Revision C 5.1.4.1 Status Message Job Cancel The printer shows a status message only when: Job is being canceled. The printer is free from any errors. The printer is initializing. Reset To Save Only one status message is applied to describe the current printer status. The Appears when the print settings were changed during printing.
  • Page 360 EPSON AcuLaser C8500 Revision C Calibrating Printer A “Ready” message that indicates the engine is calibrating. Offline The printer receives data and produces printing data but does not print. To return the printer to the ready status, press the On Line or Continue button.

  • Page 361: Error Message

    Continue = off <Fuser> Explanation: OHP sheet was fed backside, or not-EPSON-approved OHP Open the Fuser Unit, remove the jammed paper, and sheet was fed into the printer, which caused a paper jam in close the unit. The error will be automatically cleared.
  • Page 362 EPSON AcuLaser C8500 Revision C Solution: Open the front cover, install the Waste Toner Box, and close Irregular Density the cover to clear the error. LED: On Line = off Continue = off Wrong Photoconductor Explanation: The print data sent to the printer requires too much toner,...
  • Page 363 EPSON AcuLaser C8500 Revision C Replace Photocondctr Cover A Open LED: On Line = off Continue = off LED: On Line = off Continue = off Explanation: The engine has detected that the photoconductor has Explanation: The Cover A (Paper Exit Cover) is open.
  • Page 364 EPSON AcuLaser C8500 Revision C Cover E Open Paper Out sss ttt LED: On Line = off Continue = off LED: On Line = off Continue = off Explanation: The Cover E (Feeder Cover) is open. Explanation: 1. There is no paper loaded in the selected paper source sss.
  • Page 365 EPSON AcuLaser C8500 Revision C When “Size Ignore” in the “Config” menu = Off and in registering the font macro pattern or so, the printer “Auto Cont” in the “Config” menu = Off, the printer will ignores the bad command and continues to print.
  • Page 366 EPSON AcuLaser C8500 Revision C Invalid ROM B Copy System Error LED: On Line = off Continue = off LED: On Line = off Continue = off Explanation: The ROM module in slot B can not be used with this printer.

  • Page 367: Warning Message

    EPSON AcuLaser C8500 Revision C 5.1.4.3 Warning Message printing menu is replaced with the value for the Page Size. Depending on the paper sizes, the printer may not be able to Warning errors have no effect on printer operation. detect paper size mismatches and this warning will not be displayed.
  • Page 368 EPSON AcuLaser C8500 Revision C 1. Press the continue button to clear the warning. Image Optimum 2. Perform a “Reset” operation. LED: No effect on LED state. Need Memory Explanation: There was not enough memory to process the print data and the printer optimized the data (reduced the resolution).
  • Page 369 EPSON AcuLaser C8500 Revision C Solution: Perform any of the following procedures to clear the warning Format Error ROM A message. LED: No effect on LED state. 1. Press the Continue button. 2. Perform a Reset operation. Explanation: If the ROM inserted in the slot A is new, take a necessary 3.
  • Page 370 EPSON AcuLaser C8500 Revision C Waste T Box Nearfull Worn Fuser LED: No effect on LED state. LED: No effect on LED state. Explanation: The Waste Toner Box is almost full. (The engine's detection Explanation: The fuser unit life is coming.

  • Page 371: Service-Call Error Messages

    EPSON AcuLaser C8500 Revision C 5.1.4.4 Service-Call Error Messages Table 5-2. Engine Related Service-Call Errors Error Type Error Code Explanation See the following tables for the detailed information on the Service-Call Error messages. Fuser Unit fan2 malfunction Fuser Unit fan1 malfunction FIP-1.28...
  • Page 372 EPSON AcuLaser C8500 Revision C Table 5-3. Controller Related Service-Call Error Controller Related Service-Call Error Error Error Explanation Type Code Table 5-3. Controller Related Service-Call Error 1010 Verify error FIP-1.44 Error Error 1020 RAM DIMM error (Slot 0) FIP-1.45 Explanation...

  • Page 373: Level 1 Fip (Fault Isolation Procedure)

    EPSON AcuLaser C8500 Revision C 5.2 Level 1 FIP (Fault Isolation Procedure) PIN of another AG, SG or RTN instead of “P/J3 - 4PIN.” AG's, SG's and RTN's are however not all of the same level, so you must be careful not to confuse them.

  • Page 374: Fip Entry Chart

    EPSON AcuLaser C8500 Revision C 5.2.2 FIP Entry Chart Go to Table 5- 1 Troubles relating Start LED Messages LCD Message List Lack of paper not detected for Cassette 1 Go to FIP-1.5 Abnormal Go to FIP-1.6 Lack of paper not detected for MSI tray Operation Go to FIP-1.2...
  • Page 375 FIP-1.1 Cassette 1 Not Set FIP-1.1 Cassette 1 Not Set Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount the Go to step 2. *Main parts to check faulty part(s)
  • Page 376 FIP-1.2 Fuser Unit Malfunction (No Fuser Unit) Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount the Go to step 2. *Main parts to check concerned part(s)
  • Page 377 EPSON AcuLaser C8500 Revision C *FUSER ASSY replacement check Replace the FUSER ASSY. Replace the MCU PWB Problem solved. Does the problem still occur? Troubleshooting Level 1 FIP (Fault Isolation Procedure) 5-25...
  • Page 378 FIP-1.3 WASTE TONER BOX Not Mounted Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount the Go to step 2. *Main parts to check concerned part(s)
  • Page 379 FIP-1.4 TONER CARTRIDGE BK/C/M/Y Not Mounted Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount the adherence of foreign matter? Go to step 2. concerned part(s). *Main parts to check...
  • Page 380 FIP-1.5 Cassette 1 No Paper FIP-1.5 Cassette 1 No Paper Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount the Go to step 2. *Main parts to check concerned part(s).
  • Page 381 FIP-1.6 MSI Tray No Paper FIP-1.6 MSI Tray No Paper Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount the adherence of foreign matter? Go to step 2. concerned part(s). *Main parts to check...
  • Page 382 FIP-1.7 CRUM Error FIP-1.7 CRUM Error Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount the Go to step 2. *Main parts to check concerned part(s).
  • Page 383 FIP-1.8 EXIT JAM FIP-1.8 EXIT JAM Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, Replace and remount the dirt, adherence of foreign matter? concerned part(s). Go to step 2. *Main parts to check REGI.
  • Page 384 FIP-1.9 FUSER JAM FIP-1.9 FUSER JAM Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount the *Main parts to check concerned part(s). Go to step 2.
  • Page 385 EPSON AcuLaser C8500 Revision C *FUSER IN SENSOR check Is the FUSER IN SENSOR functioning properly? Go to step 8. Go to FIP-2.25 • By using the DIAG tool, check by Digital Input Test device code “24” . *FUSER DRIVE ASSY check Replace or remount the Go to step 9.
  • Page 386 FIP-1.10 REGI. JAM FIP-2.6 Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount the *Main parts to check Go to step 2. concerned part(s). REGI. SENSOR, MAIN P/H FRAME ASSY...
  • Page 387 EPSON AcuLaser C8500 Revision C *P/H DRIVE ASSY check Replace and remount the P/ Is the P/H DRIVE ASSY improperly mounted? Go to step 10. H DRIVE ASSY. Are the gears faulty? *FEED SOLENOID check Replace the MCU PWB. Go to FIP-2.6...
  • Page 388 FIP-1.11 OHP Film Incorrect Mounting FIP-1.11 OHP Film Incorrect Mounting Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount the adherence of foreign matter? Go to step 2. concerned part(s). *Main parts to check...
  • Page 389 FIP-1.12 Size Mismatch FIP-1.12 Size Mismatch Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount the Go to step 2. *Main parts to check concerned part(s).
  • Page 390 EPSON AcuLaser C8500 Revision C *REGI. SENSOR check Go to FIP 2.25 “Faulty Is the REGI. SENSOR functioning properly? Problem solved. FUSER IN SENSOR.” • By using the DIAG tool, check by Digital Input Test device code “29”. Troubleshooting Level 1 FIP (Fault Isolation Procedure)
  • Page 391 FIP-1.13 NVRAM malfunction FIP-1.13 NVRAM malfunction Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 392 FIP-1.14 P/H MOTOR malfunction FIP-1.14 P/H MOTOR malfunction Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount the *Main parts to check Go to step 2. concerned part(s).
  • Page 393 EPSON AcuLaser C8500 Revision C *MAIN P/H FRAME ASSY check Replacement of faulty Go to step 10. part(s). Does the MAIN P/H FRAME ASSY turn smoothly? *WASTE TONER BOX check Does the rotor of the P/H MOTOR ASSY turn smoothly when the WASTE TONER BOX is...
  • Page 394 FIP-1.15 Motor 1 (PR Motor) malfunction Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount the adherence of foreign matter? Go to step 2. concerned part(s). *Main parts to check...
  • Page 395 EPSON AcuLaser C8500 Revision C *PROCESS DRIVE ASSY check Is the PROCESS DRIVE ASSY functioning properly? Replace the MCU PWB. Go to FIP-2.30 • By using the DIAG tool, check by Digital Input Test device code “10”. Troubleshooting Level 1 FIP (Fault Isolation Procedure)
  • Page 396 FIP-1.16 ROS motor malfunction FIP-1.16 ROS motor malfunction Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount the adherence of foreign matter? Go to step 2. concerned part(s). *Main parts to check...
  • Page 397 FIP-1.17 ROTARY MOTOR ASSY-Related Error FIP-1.17 ROTARY MOTOR ASSY-Related Error Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount the Go to step 2. *Main parts to check concerned part(s).
  • Page 398 EPSON AcuLaser C8500 Revision C *ROTARY MOTOR ASSY check Is the ROTARY MOTOR ASSY functioning properly? Replace the MCU PWB. Go toFIP-2.32 • By using the DIAG tool, check by Digital Output Test device code “10,11”. Troubleshooting Level 1 FIP (Fault Isolation Procedure)
  • Page 399 FIP-1.18 ADC sensor soiled FIP-1.18 ADC sensor soiled Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount the adherence of foreign matter? Go to step 2. concerned part(s). *Main parts to check...
  • Page 400 FIP-1.19 Toner density malfunction (High density) Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount the adherence of foreign matter? Go to step 2. concerned part(s). *Main parts to check DEVE.CONTACT ASSY, ADC SENSOR ASSY, MCU PWB...
  • Page 401 FIP-1.20 Toner density malfunction (Low density) Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount the Go to step 2. *Main parts to check concerned part(s).
  • Page 402 EPSON AcuLaser C8500 Revision C With tool: Go to step 9. *ADC Sensor surface check Remove the foreign matters. Is/Are there dirt or foreign matters on the surface of the ADC Sensor? Without tool: Go to FIP-2.18 *ADC Sensor check Is the ADC Sensor functioning properly? Go to step 10.
  • Page 403 FIP-1.21 PCDC malfunction FIP-1.21 PCDC malfunction Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount the adherence of foreign matter? Go to step 2. concerned part(s). *Main parts to check...
  • Page 404 FIP-1.23 2ND BTR malfunction FIP-1.23 2ND BTR malfunction Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence Replace and remount of foreign matter? the concerned Go to step 2. part(s). *Main parts to check...
  • Page 405 EPSON AcuLaser C8500 Revision C FIP-1.24 2ND BTR malfunction (ADVANCE) FIP-1.24 2ND BTR malfunction (ADVANCE) FIP-1.24 2ND BTR malfunction (ADVANCE) FIP-1.24 2ND BTR malfunction (ADVANCE) Treatment Step Check *Initial setting Replace and remount the BTR CAM CLUTCH, FUSER DRIVE ASSY Go to step 2.
  • Page 406 FIP-1.25 Fuser malfunction (Overheat) FIP-1.25 Fuser malfunction (Overheat) Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount *Main parts to check Go to step 2. the concerned part(s).
  • Page 407 Fuser Unit malfunction (Low temperature/ Lamp) Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount *Main parts to check Go to step 2. the concerned part(s).
  • Page 408 Treatment Step Check With tool: *Initial setting Go to step 2. Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence Without tool: of foreign matter? Replace and remount Go to step 3. *Main parts to check the concerned part(s).
  • Page 409 FIP-1.28 FUSER FAN-1 malfunction FIP-1.28 FUSER FAN-1 malfunction Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 410 FIP-1.29 FUSER CHUTE FAN Error FIP-1.29 FUSER CHUTE FAN Error Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? the concerned part(s). Go to step 2. *Main parts to check...
  • Page 411 FIP-1.30 Rear fan malfunction FIP-1.30 Rear fan malfunction Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check DEVE.(Rear) FAN, MCU PWB...
  • Page 412 “DEVELOPER ASSY K Life Over.” “Yellow toner Life Warning.” Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 413 EPSON AcuLaser C8500 Revision C Does the problem still occur when the power is turned On again? Go to step 7. Go to step 6. Does the problem occur when the power is turned ON/OFF repeatedly? Go to step 7.
  • Page 414 FIP-1.32 WASTE TONER BOX Full FIP-1.32 WASTE TONER BOX Full Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount the *Main parts to check Go to step 2. concerned part(s).
  • Page 415 FIP-1.33 FRONT COVER ASSY Open FIP-1.33 FRONT COVER ASSY Open Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 416 FIP-1.34 MSI/REGI HIGH ASSY Open FIP-1.34 MSI/REGI HIGH ASSY Open Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 417 FIP-1.35 FUSER ASSY Open FIP-1.35 FUSER ASSY Open Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 418 FIP-1.36 EXIT UPPER ASSY Open FIP-1.36 EXIT UPPER ASSY Open Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 419 FIP-1.37 TURN CHUTE COVER Open FIP-1.37 TURN CHUTE COVER Open Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 420 FIP-1.38 Cassette 1 Paper Remaining Warning Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 421 FIP-1.39 MSI Tray malfunction (Lift Up) Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 422 FIP-1.40 MSI Tray malfunction (Lift Down) Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 423 FIP-1.41 No Power FIP-1.41 No Power Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 424 FIP-1.42 Abnormal Printing Operation FIP-1.42 Abnormal Printing Operation Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check LVPS, HVPS, MCU PWB The printer does not operate the printing at all.
  • Page 425 EPSON AcuLaser C8500 Revision C FIP-1.43 Engine Communication Error FIP-1.43 Engine Communication Error FIP-1.43 Engine Communication Error FIP-1.43 Engine Communication Error Treatment Step Check *Initial setting • Remove all of the option units related to electricity and modules. Replace and remount Bring everything back to a normal status.
  • Page 426 EPSON AcuLaser C8500 Revision C FIP-1.45 Error in standard RAM FIP-1.45 Error in standard RAM FIP-1.45 Error in standard RAM FIP-1.45 Error in standard RAM Treatment Step Check *Initial setting • Remove all of the option units related to electricity and modules.
  • Page 427 EPSON AcuLaser C8500 Revision C FIP-1.46 CONTROLLER PWB (IC15, IC16)-Related Error FIP-1.46 CONTROLLER PWB (IC15, IC16)-Related Error FIP-1.46 CONTROLLER PWB (IC15, IC16)-Related Error FIP-1.46 CONTROLLER PWB (IC15, IC16)-Related Error Treatment Step Check *Initial setting • Remove all of the option units related to electricity and modules.
  • Page 428 NOTE: Since the DIMM has the right direction to insert , make sure to insert it in the concerned part(s). Problem solve. the correct direction. • Check if the DIMM is available for this printer, AcuLaser C8500. • Other than those above, replace the CONTROLLER PWB. Troubleshooting Level 1 FIP (Fault Isolation Procedure)
  • Page 429 EPSON AcuLaser C8500 Revision C FIP-1.49 CONTROLLER PWB EEPROM (IC21)-Related Error FIP-1.49 CONTROLLER PWB EEPROM (IC21)-Related Error FIP-1.49 CONTROLLER PWB EEPROM (IC21)-Related Error FIP-1.49 CONTROLLER PWB EEPROM (IC21)-Related Error Treatment Step Check *Initial setting • Remove all of the option units related to electricity and modules.
  • Page 430 EPSON AcuLaser C8500 Revision C FIP-1.51 CONTROLLER PWB-Related to Other Hardware Errors FIP-1.51 CONTROLLER PWB-Related to Other Hardware Errors FIP-1.51 CONTROLLER PWB-Related to Other Hardware Errors FIP-1.51 CONTROLLER PWB-Related to Other Hardware Errors Treatment Step Check *Initial setting • Remove all of the option units related to electricity and modules.
  • Page 431 EPSON AcuLaser C8500 Revision C FIP-1.53 RTC (IC 50) Abnormal Printing FIP-1.53 RTC (IC 50) Abnormal Printing FIP-1.53 RTC (IC 50) Abnormal Printing FIP-1.53 RTC (IC 50) Abnormal Printing Treatment Step Check *Initial setting • Remove all of the option units related to electricity and modules.

  • Page 432: Level 2 Fip

    FIP-2.1 FaultyLVPS ５ VDC FIP-2.1 FaultyLVPS ５ VDC Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence Replace and remount of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 433 EPSON AcuLaser C8500 Revision C *Interlock route check Is the voltage between P32-6PIN <=> P32-12PINP 5VDC? Go to step 4. Replace the LVPS. • Close the FUSER ASSY, MAIN P/H FRAME ASSY FRONT COVER ASSY and check. *LVPS relay route check Is the voltage between P33-9PIN <=>...
  • Page 434 EPSON AcuLaser C8500 Revision C *MCU PWB check Replace the MAIN Is the voltage 5VDC between P/J21-1PIN <=> P/J21-2PIN 5VDC? Replace the MCU PWB. HARNESS ASSY. • Close the MAIN P/H FRAME ASSY, FUSER ASSY FRONT COVER ASSY and check.
  • Page 435 FIP-2.3 Faulty CASSETTE NO PAPER SENSOR Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount the Go to step 2. *Main parts to check concerned part(s).
  • Page 436 FIP-2.4 Faulty LOW PAPER SENSOR FIP-2.4 Faulty LOW PAPER SENSOR Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 437 FIP-2.5 Faulty SIZE SWITCH ASSY FIP-2.5 Faulty SIZE SWITCH ASSY Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount the adherence of foreign matter? Go to step 2. concerned part(s). *Main parts to check...
  • Page 438 FIP-2.6 Faulty FEED SOLENOID FIP-2.6 Faulty FEED SOLENOID Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 439 FIP-2.7 Faulty EMPTY SENSOR FIP-2.7 Faulty EMPTY SENSOR Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 440 FIP-2.8 Faulty MSI OHP SENSOR FIP-2.8 Faulty MSI OHP SENSOR Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 441 FIP-2.9 Faulty MSI EDGE SENSOR FIP-2.9 Faulty MSI EDGE SENSOR Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 442 FIP-2.10 Faulty PICK UP CLUTCH FIP-2.10 Faulty PICK UP CLUTCH Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount *Main parts to check Go to step 2. the concerned part(s).
  • Page 443 EPSON AcuLaser C8500 Revision C Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s). OHP SENSOR, REGI. HARNESS ASSY...
  • Page 444 FIP-2.12 Faulty REGI. SENSOR FIP-2.12 Faulty REGI. SENSOR Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 445 FIP-2.13 REGI. CLUTCH FIP-2.13 REGI. CLUTCH Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 446 FIP-2.14 PRE-REGI. CLUTCH FIP-2.14 PRE-REGI. CLUTCH Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 447 FIP-2.15 Faulty WASTE TONER SENSOR FIP-2.15 Faulty WASTE TONER SENSOR Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount *Main parts to check Go to step 2. the concerned part(s)
  • Page 448 FIP-2.16 Faulty TONER BOX SENSOR FIP-2.16 Faulty TONER BOX SENSOR Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s)
  • Page 449 FIP-2.17 Faulty ROS ASSY FIP-2.17 Faulty ROS ASSY Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount *Main parts to check Go to step 2. the concerned part(s).
  • Page 450 EPSON AcuLaser C8500 Revision C *MAIN HARNESS ASSY continuity check Is there a proper continuity between the following? J33-2PIN<=>P195-2PIN Replace the MAIN Go to step 10. P195-1PIN<=>J196-2PIN HARNESS ASSY. P196-1PIN<=>J194-1PIN J193-1PIN<=>J33-1PIN *TOP COVER SWITCH continuity check Replace the TOP Go to step 11.
  • Page 451 FIP-2.18 Faulty ADC Sensor FIP-2.18 Faulty ADC Sensor Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 452 FIP-2.19 Faulty ADC Solenoid FIP-2.19 Faulty ADC Solenoid Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 453 FIP-2.20 Faulty CARTRIDGE SENSOR FIP-2.20 Faulty CARTRIDGE SENSOR Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 454 FIP-2.21 Faulty FUSER EXIT SENSOR-1 FIP-2.21 Faulty FUSER EXIT SENSOR-1 Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of Replace and foreign matter? remount the Go to step 2. *Main parts to check concerned part(s).
  • Page 455 FIP-2.22 Faulty ROTARY SENSOR FIP-2.22 Faulty ROTARY SENSOR Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence Replace and remount of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 456 FIP-2.23 Faulty TR0 SENSOR FIP-2.23 Faulty TR0 SENSOR Treatment Step Check *Initial setting Use of parts of non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 457 FIP-2.24 Faulty BTR CAM CLUTCH FIP-2.24 Faulty BTR CAM CLUTCH Treatment Step Check *Initial setting Use of any non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence Replace and remount of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 458 FIP-2.25 Faulty FUSER IN SENSOR FIP-2.25 Faulty FUSER IN SENSOR Treatment Step Check *Initial setting Use of any non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 459 FIP-2.26 Faulty FUSER EXIT SENSOR FIP-2.26 Faulty FUSER EXIT SENSOR Treatment Step Check *Initial setting Use of any non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 460 FIP-2.27 Faulty TEMP. SENSOR ASSY FIP-2.27 Faulty TEMP. SENSOR ASSY Treatment Step Check *Initial setting Use of any non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 461 FIP-2.28 Faulty CLEANER CAM SOLENOID FIP-2.28 Faulty CLEANER CAM SOLENOID Treatment Step Check *Initial setting Use of any non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 462 FIP-2.29 Faulty TOP EXIT SENSOR FIP-2.29 Faulty TOP EXIT SENSOR Treatment Step Check *Initial setting Use of any non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount Go to step 2. *Main parts to check the concerned part(s).
  • Page 463 FIP-2.30 Faulty PROCESS DRIVE ASSY FIP-2.30 Faulty PROCESS DRIVE ASSY Treatment Step Check *Initial setting Use of any non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of Replace and remount foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 464 FIP-2.31 Faulty P/H MOTOR ASSY FIP-2.31 Faulty P/H MOTOR ASSY Treatment Step Check *Initial setting Use of any non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 465 FIP-2.32 Faulty ROTARY MOTOR ASSY FIP-2.32 Faulty ROTARY MOTOR ASSY Treatment Step Check *Initial setting Use of any non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount adherence of foreign matter? Go to step 2. the concerned part(s). *Main parts to check...
  • Page 466 FIP-2.33 Faulty DISPENSE CLUTCH ASSY FIP-2.33 Faulty DISPENSE CLUTCH ASSY Treatment Step Check *Initial setting Use of any non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? Replace and remount the Go to step 2. *Main parts to check concerned part(s).
  • Page 467 FIP-2.34 Faulty DEVE. CLUTCH ASSY FIP-2.34 Faulty DEVE. CLUTCH ASSY Treatment Step Check *Initial setting Use of any non-EPSON specifications, improper mounting, damage, distortion, dirt, Replace and remount the adherence of foreign matter? Go to step 2. concerned part(s). *Main parts to check DEVE.
  • Page 468 FIP-2.35 Faulty HVPS" Treatment Step Check *Initial setting Use of any non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? *Main parts to check Replace and remount Go to step 2. BCR WIRE, DEVE. WIRE, BCR CONNECTOR ASSY the concerned part(s).
  • Page 469 EPSON AcuLaser C8500 Revision C *MAIN HARNESS ASSY continuity check Replace the MAIN Go to step 11. HARNESS ASSY. Is there a proper continuity between J16 <=> J42? *MCU PWB replacement check Replace with the properly functioning MCU PWB? Replace the HVPS.
  • Page 470 FIP-2.36 Noise FIP-2.36 Noise Treatment Step Check *Initial setting Use of any non-EPSON specifications, improper mounting, damage, distortion, dirt, adherence of foreign matter? *Main parts to check Replace and remount Go to step 2. LVPS, BCR CONNECTOR ASSY the concerned part(s).
  • Page 471 EPSON AcuLaser C8500 Revision C *MCU PWB replacement check Replace with the properly functioning MCU PWB? Go to step 11. Problem solved. Does the problem still occur? *Initial Check Replace and remount Double check the main parts and the related to the main parts.

  • Page 472: Picture Image Trouble

    EPSON AcuLaser C8500 Revision C 5.4 Picture Image Trouble 5.5 Picture Quality FIP NOTE: The following explanation assumes the printer controller is 5.4.1 Picture Image Troubleshooting Entry Chart functioning properly. You can however easily determine whether the problem is the printer controller or engine by...
  • Page 473 EPSON AcuLaser C8500 Revision C Picture quality FIP covers the following typical problems involving picture FIP-3.1 Too Light FIP-3.1 Too Light FIP-3.1 Too Light FIP-3.1 Too Light quality: FIP-3.1 Description / initial check FIP-3.2 White FIP-3.3 The picture image has a white streak in the paper transport direction or is too light.
  • Page 474 EPSON AcuLaser C8500 Revision C FIP-3.2 All White FIP-3.2 All White FIP-3.2 All White FIP-3.2 All White Faulty secondary transfer Is the toner image on the TRANSFER BELT ASSY properly transferred to Description / initial check paper? Check “Faulty HVPS.”...
  • Page 475 EPSON AcuLaser C8500 Revision C FIP-3.3 All Black FIP-3.3 All Black FIP-3.3 All Black FIP-3.3 All Black FIP-3.4 White or Too Light in Paper Transport Direction FIP-3.4 White or Too Light in Paper Transport Direction FIP-3.4 White or Too Light in Paper Transport Direction FIP-3.4 White or Too Light in Paper Transport Direction...
  • Page 476 EPSON AcuLaser C8500 Revision C FIP-3.5 White or Too Light in Paper Transport and Vertical FIP-3.5 White or Too Light in Paper Transport and Vertical FIP-3.5 White or Too Light in Paper Transport and Vertical FIP-3.5 White or Too Light in Paper Transport and Vertical...
  • Page 477 EPSON AcuLaser C8500 Revision C FIP-3.6 Black Dots FIP-3.6 Black Dots FIP-3.6 Black Dots FIP-3.6 Black Dots Faulty HEAT ROLL/PRESSURE ROLL Is the HEAT ROLL/PRESSURE ROLL Replace or clean the HEAT damaged? Is there dirt or foreign Description / initial check ROLL/PRESSURE ROLL.
  • Page 478 EPSON AcuLaser C8500 Revision C FIP-3.7 Fogging FIP-3.7 Fogging FIP-3.7 Fogging FIP-3.7 Fogging FIP-3.8 Paper Skew FIP-3.8 Paper Skew FIP-3.8 Paper Skew FIP-3.8 Paper Skew Description / initial check Description / initial check Fogging Skew When toner adheres to the margins of the print.
  • Page 479 EPSON AcuLaser C8500 Revision C FIP-3.9 Wrinkles FIP-3.9 Wrinkles FIP-3.9 Wrinkles FIP-3.9 Wrinkles FIP-3.10 Unsatisfactory Fixing FIP-3.10 Unsatisfactory Fixing FIP-3.10 Unsatisfactory Fixing FIP-3.10 Unsatisfactory Fixing Description / initial check Description / initial check Wrinkles Unsatisfactory Fixing Paper becomes wrinkled when printing.
  • Page 480 C H A P T E R MAINTENANCE...
  • Page 481 EPSON AcuLaser C8500 Revision C 6.1 About On-Site Servicing - Do not catch your hands and clothes in the rotating W A R N I N G parts such as rollers and fans. This section contains information you need when visiting your customer...
  • Page 482 EPSON AcuLaser C8500 Revision C 6.1.1 On-site Service Flow Figure 6-1. On-site Service Flowchart Chapter 6 Maintenance...
  • Page 483 EPSON AcuLaser C8500 Revision C 6.1.2 Description of the On-site Service PRINT QUALITY CHECK This section gives instruction on the on-site service in detail. 1. Print several pages of monochrome and color status sheet to check print quality. PRELIMINARY CHECK <Points to check>...
  • Page 484 EPSON AcuLaser C8500 Revision C 2. If any abnormality is found in the listed check points: PREVENTIVE MAINTENANCE (CHECKING THE CONSUMABLES AND REGULARLY REPLACED PARTS) Check the life counters of the consumables and regularly replaced parts. (See Section 6.2.) In addition to repair and maintenance of the printer, preventive Perform the adjustment.

  • Page 485: Chapter 6 Maintenance

    EPSON AcuLaser C8500 Revision C FINAL CHECKOUT 1. Check exterior view of the printer. 2. If necessary, give an instruction to the users. How to clear the paper jam error How to replace the consumables What kind of paper can be used for the printer.

  • Page 486: Maintenance Menu

    EPSON AcuLaser C8500 Revision C 6.2 Maintenance Menu The Maintenance Menu contains the following functions: 1. Shows life counter values for: 1) the Consumabl/Regularly Replaced parts (See 6.3.) 2) the Main After-Sales parts (See 6.4.) 3) the total number of printed pages and color print pages.

  • Page 487: Entry To The Maintenance Menu

    EPSON AcuLaser C8500 Revision C 6.2.1 Entry to the Maintenance Menu R eady Make sure the following conditions before entering C A U T I O N the Maintenance menu: Sel ecType but t on - All interface cables are disconnected.

  • Page 488: Engine Status Sheet

    EPSON AcuLaser C8500 Revision C 6.2.2 Engine Status Sheet 5. Fuser: Shows the amount of the Fuser Unit used. The indicated value is the total number of sheets 1. Total Counts printed after the “FuserUnit Clear” is executed in the Maintenance Mode.
  • Page 489 EPSON AcuLaser C8500 Revision C 9. IBT Belt: Shows the amount of the IBT Belt used. The 11. Engine Version indicated value is the number of the IBT Belt The value calculated from the engine side with MCU : cycle (rotation times) after the “IBT Belt Clear” is the mechanism controller version in the printer.
  • Page 490 EPSON AcuLaser C8500 Revision C 12. Error Log Lists the latest 20 errors indicating the corresponding panel messages, EJL status Engine Status Sheet codes, and Total Pages. The most recent error appears at the top of the list, and then the rest in Total Counts order of recentness.
  • Page 491 EPSON AcuLaser C8500 Revision C The detailed information for the Engine Status Sheet and Table 6-1. Engine Status Sheet Information Details Kept by: Counter limit Information Count unit When to count Conditions for clearing the counter Where to store Total Sheets...

  • Page 492: Consumable Replacement

    PHOTOCONDUCTOR UNIT As for the toner level, the users can check by printing a status sheet or panel operation, or “EPSON printer window 3.” The service men, on the other hand, can access to detailed information, including the life end warning, by using the Maintenance Mode.

  • Page 493: Toner Cartridge Replacement

    EPSON AcuLaser C8500 Revision C 6.3.1 TONER CARTRIDGE Replacement 1. Referring to the LCD message, check the color of the TONER CARTRIDGE which needs to be replaced. TONER CARTRIDGE includes Yellow, Magenta, Cyan, and K (Black) 2. Open the FRONT COVER.
  • Page 494 EPSON AcuLaser C8500 Revision C 4. Remove the cartridge following the steps below: 5. Hold a new TONER CARTRIDGE by the right and left ends and gently shake it up and down to distribute toner evenly. 1) Turn the cartridge knob counterclockwise 90 degrees so that the symbol on the knob is aligned with the unlocking symbol.
  • Page 495 EPSON AcuLaser C8500 Revision C NOTE: If the TONER CARTRIDGE is not properly positioned, it may cause toner to spill inside the printer and bring out low print quality and printer malfunction and errors. 2) Turn the cartridge knob counterclockwise 90 degrees so that the symbol on the knob is aligned with the locking symbol.

  • Page 496: Photoconductor Unit Replacement

    EPSON AcuLaser C8500 Revision C 6.3.2 PHOTOCONDUCTOR UNIT Replacement 1. Turn the printer power on. 2. Open the FRONT COVER. The PHOTOCONDUCTOR of the DRUM CARTRIDGE is exposed by the ROS ASSEMBLY and developed by the DEVELOPER ASSEMBLY, and transmits images onto the IBT.
  • Page 497 EPSON AcuLaser C8500 Revision C 5. Hold the handle in the DRUM CARTRIDGE and pull the DRAM 8. Hold the orange handle on top of the DRUM CARTRIDGE and CARTRIDGE out approximately 20 cm (8 inches). place the right and left guide edges on the rails in the printer. Then, insert the DRUM CARTRIDGE straight into the printer.

  • Page 498: Waste Toner Box Replacement

    EPSON AcuLaser C8500 Revision C 6.3.3 WASTE TONER BOX Replacement 2. Hold the lever and push down the tab of the WASTE TONER BOX. The WASTE TONER BOX is to collect the excess toner released when printing. The consumable DRUM CARTRIDGE contains the WASTE TONER BOX.
  • Page 499 EPSON AcuLaser C8500 Revision C 4. Hold the handle on a new WASTE TONER BOX and insert it into the printer all the way until the tab clicks. Figure 6-19. WASTE TONER BOX Replacement 3 5. Close the FRONT COVER. The printer automatically returns to the ready status.

  • Page 500: Regularly Replaced Parts Replacement

    6.4 Regularly Replaced Parts Replacement 6.6 Installation The Regularly Replaced part for this printer, AcuLaser C8500, is the This section provides a guideline in order to install the printer on its MAIN FUSER ASSY only. When you replace the MAIN FUSER ASSY, place.
  • Page 501 EPSON AcuLaser C8500 Revision C EXIT TRAY ASSY SETUP LOCATIONS Power cord Provide enough space to operate the printer. (See Chapter 6, Figure 1-7) SETUP PROCEDURE Avoid places subject to high temperatures, excessive humidity, low temperatures, excessively low humidity, and extreme temperature For details, see the “Operating Instructions”...
  • Page 502 EPSON AcuLaser C8500 Revision C 6. After removing the toner cartridge from its sealed package, hold the toner cartridge by both ends and shake firmly 7 or 8 times. 7. While turning the ROTARY FRAME ASSY, mount each toner cartridge.

  • Page 503: Chapter 7 Appendix

    C H A P T E R APPENDIX...

  • Page 504: Overview

    EPSON AcuLaser C8500 Revision C 7.1 Overview 7.2 Parts List and Exploded Diagrams This chapter describes the printer parts. The parts are grouped into 15 major 7.2.1 How to Use the Parts List and Exploded plates. These plates are divided further into the following 28 smaller plates.

  • Page 505: Parts List Tables

    EPSON AcuLaser C8500 Revision C 7.2.2 Parts List Tables Table 7-1. Parts List Part No. Part Name See the following table for parts numbers and names. 02-1-04 PLATE LINK Table 7-1. Parts List 02-1-05 BOTTOM PLATE ASSY Part No. Part Name...
  • Page 506 EPSON AcuLaser C8500 Revision C Table 7-1. Parts List Table 7-1. Parts List Part No. Part Name Part No. Part Name 03-1-29 FEED ROLL ASSY 04-3-20 MSI FEED FRAME ASSY 03-1-31 FEED ROLL 04-3-23 BOTTOM PLATE SENSOR 03-1-35 FEED SOLENOID...
  • Page 507 EPSON AcuLaser C8500 Revision C Table 7-1. Parts List Table 7-1. Parts List Part No. Part Name Part No. Part Name 07-1-20 ET CARTRIDGE MAGENTA UNIT 09-2-10 PRESSURE ROLL 07-1-30 ET CARTRIDGE CYAN UNIT 09-2-13 LOWER GUIDE ASSY 07-1-40 ET CARTRIDGE BLACK UNIT...
  • Page 508 EPSON AcuLaser C8500 Revision C Table 7-1. Parts List Table 7-1. Parts List Part No. Part Name Part No. Part Name 09-4-14 INPUT BRACKET ASSY 12-1-28 FRAME FOOT 09-4-22 CLEANER CAM GEAR 12-1-29 SHEET CLAMP 09-4-24 CLEANER CAM SOLENOID 13-1-01...

  • Page 509: Exploded Diagrams

    See the following parts for the exploded locations. after-sale service parts. These parts are for AcuLaser C8500 as well as LP-8500C. The parts to which no reference number is assigned will not be available as after-sale service parts.
  • Page 510 EPSON AcuLaser C8500 Revision C The parts to which no reference number The parts to which no reference number is assigned will not be available as is assigned will not be available as after-sale service parts. after-sale service parts. LP-8500C (3.1) 10221 Rev.01...
  • Page 511 EPSON AcuLaser C8500 Revision C The parts to which no reference number The parts to which no reference number is assigned will not be available as is assigned will not be available as after-sale service parts. after-sale service parts. LP-8500C(4.2) LP-8500C (4.3)
  • Page 512 EPSON AcuLaser C8500 Revision C The parts to which no reference number is assigned will not be available as The parts to which no reference number after-sale service parts. is assigned will not be available as after-sale service parts. LP-8500C (6.1) LP-8500C (4.4)
  • Page 513 EPSON AcuLaser C8500 Revision C The parts to which no reference number is assigned will not be available as The parts to which no reference number after-sale service parts. is assigned will not be available as after-sale service parts. LP-8500C (7.1) 10221 Rev.01...
  • Page 514 EPSON AcuLaser C8500 Revision C The parts to which no reference number The parts to which no reference number is assigned will not be available as is assigned will not be available as after-sale service parts. after-sale service parts. LP-8500C (8.1) LP-8500C (8.2)
  • Page 515 EPSON AcuLaser C8500 Revision C The parts to which no reference number The parts to which no reference number is assigned will not be available as is assigned will not be available as after-sale service parts. after-sale service parts. (ALL this page Except Ref:02) LP-8500C (8.3)
  • Page 516 EPSON AcuLaser C8500 Revision C The parts to which no reference number The parts to which no reference number is assigned will not be available as is assigned will not be available as after-sale service parts. after-sale service parts. LP-8500C (9.3) LP-8500C (9.2)
  • Page 517 EPSON AcuLaser C8500 Revision C The parts to which no reference number The parts to which no reference number is assigned will not be available as is assigned will not be available as after-sale service parts. after-sale service parts. (WITH 22) LP-8500C (10.1)
  • Page 518 EPSON AcuLaser C8500 Revision C The parts to which no reference number The parts to which no reference number is assigned will not be available as is assigned will not be available as after-sale service parts. after-sale service parts. LP-8500C (10.2) LP-8500C (11.1)
  • Page 519 EPSON AcuLaser C8500 Revision C The parts to which no reference number The parts to which no reference number is assigned will not be available as is assigned will not be available as after-sale service parts. after-sale service parts. LP-8500C (13.1) LP-8500C (12.1)
  • Page 520 EPSON AcuLaser C8500 Revision C The parts to which no reference number The parts to which no reference number is assigned will not be available as is assigned will not be available as after-sale service parts. after-sale service parts. LP-8500C (14.1) 10221 Rev.01...

  • Page 521: Wiring Diagrams

    EPSON AcuLaser C8500 Revision C 7.3 Wiring Diagrams This section describes the connector locations. “P” and “J” stand for “Plug” and “Jack”, respectively. 7.3.1 P/J Locations See the following figures for the P/J locations. Figure 7-25. P/J Location 1 APPENDIX...
  • Page 522 EPSON AcuLaser C8500 Revision C Figure 7-26. P/J Location 2 Figure 7-27. P/J Location 3 APPENDIX Wiring Diagrams 7-20...
  • Page 523 EPSON AcuLaser C8500 Revision C Figure 7-28. P/J Location 4 Figure 7-29. P/J Location 5 APPENDIX Wiring Diagrams 7-21...
  • Page 524 EPSON AcuLaser C8500 Revision C Figure 7-30. P/J Location 6 Figure 7-31. P/J Location 7 APPENDIX Wiring Diagrams 7-22...

  • Page 525: Plug And Jack (P/J) Location Tables

    EPSON AcuLaser C8500 Revision C 7.3.2 Plug and Jack (P/J) Location Tables See the following table for the plug and jack (P/J) location. Table 7-2. P/J Location Coordinates Description F-208 Connects MCU PWB and MAIN HARNESS ASSY F-207 Connects MCU PWB and ROS HARNESS...
  • Page 526 EPSON AcuLaser C8500 Revision C Table 7-2. P/J Location (continued) Table 7-2. P/J Location (continued) Coordinates Description Coordinates Description Connects PROCESS DRIVE ASSY and MAIN HARNESS Connects FUSER EXIT SENSOR-1,FUSER EXIT SENSOR- D-608 F-813 ASSY 2,TEMP. SENSOR ASSY and FUSER HARNESS ASSY...
  • Page 527 EPSON AcuLaser C8500 Revision C Table 7-2. P/J Location (continued) Table 7-2. P/J Location (continued) Coordinates Description Coordinates Description H-105 Connector inside MAIN HARNESS ASSY Connects LOW PAPER SENSOR and TRAY SENSOR F-209 HARNESS Connects CARTRIDGE SENSOR and MAIN HARNESS...
  • Page 528 EPSON AcuLaser C8500 Revision C Table 7-2. P/J Location (continued) Table 7-2. P/J Location (continued) Coordinates Description Coordinates Description H-814 Connects MAIN HARNESS ASSY and Option Duplex Connects PICK UP CLUTCH and REGI HARNESS ASSY Connects MAIN HARNESS ASSY and Option Duplex...
  • Page 529 EPSON AcuLaser C8500 Revision C Table 7-2. P/J Location (continued) Coordinates Description C-607 Connects HVPS and DEVE. WIRE B-609 Connects HVPS and 1ST BTR WIRE B-608 Connects HVPS and CONTACT ROLL WIRE I-806 Connects H/R HEATER and HEATER WIRE I-806...

  • Page 530: Wiring Diagrams And Signal Information

    EPSON AcuLaser C8500 Revision C 7.4 Wiring Diagrams and Signal Information 7.4.1 Overall Wiring Connection Diagram NOTE: DEVELOPER ASSY Y, DEVELOPER ASSY M, DEVELOPER ASSY C, and DEVELOPER ASSY BK are hereinafter referred to by the The symbols used in the overall wiring connection diagrams on the following generic term “DEVELOPER ASSY”.
  • Page 531 EPSON AcuLaser C8500 Revision C Figure 7-33. Overall Wiring Connection Diagram APPENDIX Wiring Diagrams and Signal Information 7-29...

  • Page 532: Wiring And Signal Descriptions Between Components

    EPSON AcuLaser C8500 Revision C 7.4.2 Wiring and Signal Descriptions between Components 7.4.2.1 Configuration §4. MCU PWB, TURN CHUTE SWITCH, CARTRIDGE SENSOR, ROTARY SENSOR, DEVE. CLUTCH ASSY, DISPENSE CLUTCH ASSY Wiring connection diagrams are divided into 13 sections and provide details Connects MCU PWB and TURN CHUTE SWITCH.
  • Page 533 EPSON AcuLaser C8500 Revision C §10. MCU PWB, MAIN P/H FRAME ASSY Connects MCU PWB and MAIN P/H FRAME ASSY. §11. MCU PWB, MAIN P/H FRAME ASSY, MSI ASSY, REGI/MSI INTL SW, COMMUNICATION PWB Connects MCU PWB and MAIN P/H FRAME ASSY.

  • Page 534: Notation On The Diagrams For The Wiring And Signal Descriptions Be

    EPSON AcuLaser C8500 Revision C 7.4.3 Notation on the Diagrams for the Wiring and Table 7-4. Signal Descriptions between Components Symbols Used in the Wiring Connection Diagrams (continued) Symbol Description The symbols used in the wiring connection diagrams for parts on the following pages are as follows.
  • Page 535 EPSON AcuLaser C8500 Revision C Connection Diagram § § § § 1 MCU PWB, LVPS, ROS ASSY, FUSER ASSY, MAIN P/H FRAME ASSY, FRONT COVER SWITCH R, FRONT COVER SWITCH L, TOP COVER SWITCH (1/2) APPENDIX Wiring Diagrams and Signal Information...
  • Page 536 EPSON AcuLaser C8500 Revision C LVPS excess current protection circuit Table 7-5. Signal Description - § § § § 1 All output is shut off when 24VDC/5VDC supply voltage is shorted. After Signal line Description restoring the short, reset the printer by turning the power off and then, after Control signal for P/R HEATER and H/R HEATER on/ waiting 2 to 3 minutes, back on.
  • Page 537 EPSON AcuLaser C8500 Revision C Connection Diagram § § § § 2 MCU PWB, ADC SENSOR ASSY, ERASE LAMP ASSY,BTR CAM CLUTCH, CRUM ASSY, WASTE TONER SENSOR,TONER BOX SENSOR, BTR WHEEL SENSOR (1/2) APPENDIX Wiring Diagrams and Signal Information 7-35...
  • Page 538 EPSON AcuLaser C8500 Revision C Table 7-6. Signal Description - § § § § 2 Signal line Description Control signal for LED on/off in ADC SENSOR of ADC LED ON(L) 5VDC SENSOR ASSY. Measurement signal issued by the ADC SENSOR of ADC SIG ADC SENSOR ASSY.
  • Page 539 EPSON AcuLaser C8500 Revision C Connection Diagram - § § § § 3 MCU PWB, HVPS, LVPS (1/2) APPENDIX Wiring Diagrams and Signal Information 7-37...
  • Page 540 EPSON AcuLaser C8500 Revision C Table 7-7. Signal Description - § § § § 3 Signal line Description DTS ON(L) 24VDC On/off control signal for DTS output. Current monitor signal for 2ND BTR output. (Analog 2BTR I MONI value) Output control signal for 2ND BTR output. (Analog...
  • Page 541 EPSON AcuLaser C8500 Revision C Connection Diagram - § § § § 4 MCU PWB TURN CHUTE SWITCH CARTRIDGE SENSOR ROTARY SENSOR DEVE. CLUTCH ASSY DISPENSE CLUTCH ASSY (1/2) APPENDIX Wiring Diagrams and Signal Information 7-39...
  • Page 542 EPSON AcuLaser C8500 Revision C Table 7-8. Signal Description - § § § § 4 Signal line Description Sensor power ON (High) / OFF (Low) signal for USED SENSOR ON(H) 5VDC CART. SENSOR and CARTRIDGE SENSOR. CARTRIDGE SENSED(L) Toner cartridge present (Low) / not present (High) 5VDC detection signal issued by the CARTRIDGE SENSOR.
  • Page 543 EPSON AcuLaser C8500 Revision C Connection Diagram § § § § 5 MCU PWB, LVPS, ROTARY MOTOR PWB, ROTARY MOTOR ASSY (1/2) APPENDIX Wiring Diagrams and Signal Information 7-41...
  • Page 544 EPSON AcuLaser C8500 Revision C ROTARY MOTOR ASSY description. Table 7-9. Signal Description - § § § § 5 Motor type: Hybrid stepping motor Signal line Description Direction of rotation:Clockwise direction (as viewed from rear of ROTARY MOTOR Hold current control signal of ROTARY MOTOR ASSY.
  • Page 545 EPSON AcuLaser C8500 Revision C Connection Diagram - § § § § 6 MCU PWB, LVPS, TR0 SENSOR, DRIVE MOTOR PWB, FUSER MOTOR ASSY, P/H MOTOR ASSY, PROCESS DRIVE ASSY (1/2) APPENDIX Wiring Diagrams and Signal Information 7-43...
  • Page 546 EPSON AcuLaser C8500 Revision C Table 7-12. Signal Description - § § § § 6 P/H MOTOR ASSY description. Signal line Description Motor type: Permanent magnet magnetic field DC servomotor TR mark detection signal for IBT belt ASSY issued by TR0-M SENSED(L) 5VDC the TR0 SENSOR.
  • Page 547 EPSON AcuLaser C8500 Revision C Connection Diagram § § § § 7 MCU PWB, LVPS, MAIN FUSER ASSY (1/2) APPENDIX Wiring Diagrams and Signal Information 7-45...
  • Page 548 EPSON AcuLaser C8500 Revision C Table 7-13. Signal Description - § § § § 7 Signal line Description Neutral side of AC input from power source (supply AC N voltage for heater). Line side of AC input from power source (supply AC L voltage for heater).
  • Page 549 EPSON AcuLaser C8500 Revision C Connection Diagram - § § § § 8 MCU PWB, FUSER TRAY ASSY, ENVIRONMENT SENSOR (1/2) APPENDIX Wiring Diagrams and Signal Information 7-47...
  • Page 550 EPSON AcuLaser C8500 Revision C Table 7-14. Signal Description - § § § § 8 Signal line Description EXCHANGE SOLENOID On/off control signal for EXCHANGE SOLENOID in PUSH ON( L) 24VDC push direction (face-up discharge). EXCHANGE SOLENOID On/off control signal for EXCHANGE SOLENOID in PULL ON(L) 24VDC pull direction (face-down discharge).
  • Page 551 EPSON AcuLaser C8500 Revision C Connection Diagram - § § § § 9 MCU PWB SIZE SWITCH ASSY TRAY NO PAPER SENSOR LOW PAPER SENSOR FEED SOLENOID TURN CLUTCH (1/2) NOTE: The numbers (1, 2, 3, 4) preceding the signal line name indicate the cassette number.
  • Page 552 EPSON AcuLaser C8500 Revision C Table 7-15. Signal Description - § § § § 9 Table 7-16. Size Switch Signals Signal line Description Voltage Paper Size Switch (Unit: VDC) Paper size Detection signal for size of paper in cassette 1. (Analog...
  • Page 553 EPSON AcuLaser C8500 Revision C Connection Diagram - § § § § 10 MCU PWB, MAIN P/H FRAME ASSY (1/2) APPENDIX Wiring Diagrams and Signal Information 7-51...
  • Page 554 EPSON AcuLaser C8500 Revision C Table 7-17. Signal Description - § § § § 10 Signal line Description REGI. PAPER SENSED(L) Paper detection signal for MAIN P/H ASSY issued by 5VDC the REGI. SENSOR. White strip detection signal for OHP film (for color) by FRONT OHP SENSOR.
  • Page 555 EPSON AcuLaser C8500 Revision C Connection Diagram - § § § § 11 MCU PWB, MAIN P/H FRAME ASSY, MSI ASSY, REGI/MSI INTL SW. COMMUNICATION PWB (1/2) APPENDIX Wiring Diagrams and Signal Information 7-53...
  • Page 556 EPSON AcuLaser C8500 Revision C Table 7-18. Signal Description - § § § § 11 Signal line Description Signal for detecting presence of paper in the MSI EMPTY SENSED (L) ASSY issued by the EMPTY SENSOR. (High Paper 5VDC not detected, Low: Paper detected)
  • Page 557 EPSON AcuLaser C8500 Revision C Connection Diagram § § § § 12 MCU PWB, FULL STACK SENSOR, TOP EXIT SENSOR, EXIT CHUTE SWITCH, EXIT CHUTE FAN, FUSER FAN-1, DEVE. FAN (1/2) APPENDIX Wiring Diagrams and Signal Information 7-55...
  • Page 558 EPSON AcuLaser C8500 Revision C Table 7-19. Signal Description - § § § § 12 Signal line Description TOP EXIT PAPER Paper detection signal for EXIT LOWER ASSY issued SENSED(L) 5VDC by the TOP EXIT SENSOR. Signal for detecting whether exit upper ASSY is open...
  • Page 559 EPSON AcuLaser C8500 Revision C Connection Diagram - § § § § 13 MCU PWB, CONTROLLER PWB, OPERATION PANEL, CONTROLLER FAN (1/2) APPENDIX Wiring Diagrams and Signal Information 7-57...
  • Page 560 EPSON AcuLaser C8500 Revision C Table 7-20. Signal Description - § § § § 13 Signal line Description Setting to low level (connecting to SG) enables internal TEST PRINT ON(L) 5VDC test print. For P/J11 signals, see the interface specifications.

  • Page 561: Component Layout

    EPSON AcuLaser C8500 Revision C 7.5 Component Layout Figure 7-34. C311MAIN Component Layout - Component Side APPENDIX Component Layout 7-59...
  • Page 562 EPSON AcuLaser C8500 Revision C Figure 7-35. C311MAIN Component Layout - Soldered Side APPENDIX Component Layout 7-60...

  • Page 563: Circuit Diagrams

    EPSON AcuLaser C8500 Revision C 7.6 Circuit Diagrams See the following pages for the C311MAIN circuit diagrams. APPENDIX Circuit Diagrams 7-61...

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