Lexmark C500n Service Manual
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Lexmark C500n Service Manual

Lexmark C500n Service Manual

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Lexmark
C500n
5023-110
• Table of contents
• Start diagnostics
• Safety and notices
• Trademarks
• Index
Lexmark and Lexmark with diamond design are
trademarks of Lexmark International, Inc., registered
in the United States and/or other countries.

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Summary of Contents for Lexmark C500n

  • Page 1 ™ Lexmark C500n 5023-110 • Table of contents • Start diagnostics • Safety and notices • Trademarks • Index Lexmark and Lexmark with diamond design are trademarks of Lexmark International, Inc., registered in the United States and/or other countries.
  • Page 2 Lexmark, Lexmark with diamond design, and MarkNet are trademarks of Lexmark International, Inc., registered in the United States and/or other countries. Optra Forms is a trademark of Lexmark International, Inc.

  • Page 3: Table Of Contents

    5023-110 Table of contents Laser notices ................ix Preface .
  • Page 4 5023-110 Control system structure .............1-35 Electrical system and function .
  • Page 5 5023-110 Printer paper feed service check ........... . 2-41 Print quality service checks .
  • Page 6 5023-110 Waste toner bottle removal ............4-8 Photodeveloper cartridge removal .
  • Page 7 5023-110 Engine controller board ............5-13 Low voltage power supply (LVPS) board .
  • Page 8 5023-110 viii Service Manual...

  • Page 9: Laser Notices

    5023-110 Laser notices The following laser notice labels may be affixed to this printer as shown: Laser advisory label Laser notices...
  • Page 10 5023-110 Class 1 Laser statement label XXXXXXXX2004 Service Manual...
  • Page 11 5023-110 Laser notice The printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR Subchapter J for Class I (1) laser products, and elsewhere is certified as a Class I laser product conforming to the requirements of IEC 60825-1.
  • Page 12 5023-110 Avis relatif à l’utilisation de laser Pour les Etats-Unis : cette imprimante est certifiée conforme aux provisions DHHS 21 CFR alinéa J concernant les produits laser de Classe I (1). Pour les autres pays : cette imprimante répond aux normes IEC 60825-1 relatives aux produits laser de Classe I.
  • Page 13 5023-110 Avisos sobre el láser Se certifica que, en los EE.UU., esta impresora cumple los requisitos para los productos láser de Clase I (1) establecidos en el subcapítulo J de la norma CFR 21 del DHHS (Departamento de Sanidad y Servicios) y, en los demás países, reúne todas las condiciones expuestas en la norma IEC 60825-1 para productos láser de Clase I (1).
  • Page 14 5023-110 Laserinformatie De printer voldoet aan de eisen die gesteld worden aan een laserprodukt van klasse I. Voor de Verenigde Staten zijn deze eisen vastgelegd in DHHS 21 CFR Subchapter J, voor andere landen in IEC 60825-1. Laserprodukten van klasse I worden niet als ongevaarlijk aangemerkt. De printer is voorzien van een laser van klasse IIIb (3b), dat wil zeggen een gallium arsenide-laser van 5 milliwatt met een golflengte van 770- 795 nanometer.
  • Page 15 5023-110 Huomautus laserlaitteesta Tämä kirjoitin on Yhdysvalloissa luokan I (1) laserlaitteiden DHHS 21 CFR Subchapter J -määrityksen mukainen ja muualla luokan I laserlaitteiden IEC 60825-1 -määrityksen mukainen. Luokan I laserlaitteiden ei katsota olevan vaarallisia käyttäjälle. Kirjoittimessa on sisäinen luokan IIIb (3b) 5 milliwatin galliumarsenidilaser, joka toimii aaltoalueella 770 - 795 nanometriä.
  • Page 16 5023-110 Laser-melding Skriveren er godkjent i USA etter kravene i DHHS 21 CFR, underkapittel J, for klasse I (1) laserprodukter, og er i andre land godkjent som et Klasse I-laserprodukt i samsvar med kravene i IEC 60825-1. Klasse I-laserprodukter er ikke å betrakte som farlige. Skriveren inneholder internt en klasse IIIb (3b)-laser, som består av en gallium-arsenlaserenhet som avgir stråling i bølgelengdeområdet 770-795 nanometer.
  • Page 17 5023-110 Chinese laser notice Korean laser notice -xvii Laser notices...
  • Page 18 5023-110 -xviii Service Manual...

  • Page 19: Safety Information

    5023-110 Safety information • The safety of this product is based on testing and approvals of the original design and specific components. The manufacturer is not responsible for safety in the event of use of unauthorized replacement parts. • The maintenance information for this product has been prepared for use by a professional service person and is not intended to be used by others.
  • Page 20 5023-110 Sicherheitshinweise • Die Sicherheit dieses Produkts basiert auf Tests und Zulassungen des ursprünglichen Modells und bestimmter Bauteile. Bei Verwendung nicht genehmigter Ersatzteile wird vom Hersteller keine Verantwortung oder Haftung für die Sicherheit übernommen. • Die Wartungsinformationen für dieses Produkt sind ausschließlich für die Verwendung durch einen Wartungsfachmann bestimmt.
  • Page 21 5023-110 Informació de Seguretat • La seguretat d'aquest producte es basa en l'avaluació i aprovació del disseny original i els components específics. El fabricant no es fa responsable de les qüestions de seguretat si s'utilitzen peces de recanvi no autoritzades. •...

  • Page 22: Preface

    5023-110 Preface This manual contains maintenance procedures for service personnel. It is divided into the following chapters: General information contains a general description of the printer and the maintenance approach used to repair it. Special tools and test equipment, as well as general environmental and safety instructions, are discussed.

  • Page 23: General Information

    5023-110 1. General information This Lexmark™ C500 color laser printer is the ideal printer for presentations, business graphics, line art, and text. It uses laser diode electrophotographic technology to deliver remarkable quality print images and text. The printer can be used as a shared network or desktop printer.

  • Page 24: Serial Number

    5023-110 Serial number Look for serial number information on the right cover and the inside of the front cover of your printer. XXXXXXXX2004 Service Manual...

  • Page 25: Acronyms

    5023-110 Acronyms ASIC Application-Specific Integrated Circuit Dots Per Inch DRAM Dynamic Random Access Memory Electrophotographic Process Electrostatic Discharge Field Replaceable Unit High Voltage HVPS High Voltage Power Supply Local Area Network LASER Light Amplification by Stimulated Emission of Radiation Liquid Crystal Display Light-Emitting Diode Low Voltage LVPS...

  • Page 26: Specifications

    The following table contains the dimensions and weights for each printer model and option. This does not include packaging but does include the print cartridge that ships with the printer. Width Depth Height Weight inch inch inch Printers Lexmark C500n 18.9 16.5 15.2 66.0 29.0 Paper options 530-Sheet drawer 18.1 18.5 13.3...

  • Page 27: Operating Clearances

    5023-110 Operating clearances Printer sides C500n C500n with 530-sheet tray Left side 8 in (203 mm) 8 in (203 mm) Right side 20 in (508 mm) 20 in (508 mm) Front 28 in (711 mm) 28 in (711 mm) Rear...

  • Page 28: Duty Cycle

    Capacity may vary and is subject to media specifications and printer operating environment. The capacities listed are based on plain paper at 75 g/m Sources and capacities C500n Input sources Number of standard sources Number of optional input drawers...
  • Page 29 5023-110 Media input types and weights Source Type Standard tray 530-Sheet tray Printer menu Item Legal tray Paper Paper type weight Paper 60-74 Plain paper Light Xerographic or bond 60-74 (grain long) paper (16-19 lb) (16-19 lb) Xerographic or bond 75-120 75-120 Plain paper...

  • Page 30: Media Sizes

    5023-110 Media sizes Media sizes Dimensions Input Output 210 x 297 8.27 x 11.7 148 x 210 5.83 x 8.27 JIS B5 182 x 257 7.17 x 10.1 Letter 216 x 279.4 8.5 x 11 Legal 216 x 356 8.5 x 14 Executive 184.2 x 266.7 7.25 x 10.5...
  • Page 31 Transparencies are only supported in tray 1 (standard or legal trays). Labels • Labels should be selected using guidelines found in the User's Reference, Complete Printer Reference, or the Card stock & Label Guide (located at www.lexmark.com), and tested for acceptability. • Vinyl labels are not supported. •...

  • Page 32: Connectivity

    This printer is compatible with applications running under the following operating systems for either local or network connections: Apple Macintosh • Mac OS 8.6, 9.x, OS X Download the latest Lexmark printer PPD files or printer drivers from the Lexmark Web Site. Microsoft Windows • Microsoft Windows 98 2nd Edition •...
  • Page 33 5023-110 Internal Print Servers The standard Ethernet connection and optional N2100 Series print servers support the following protocols: • TCP/IP—The TCP/IP standard set of application services are supported including DHCP, BOOTP, WINS, SNMP (mib-2, host resources MIB, printer MIB, enterprise MIB, SNMP traps), HTTP, LPR/LPD, FTP, IPP1,SLP, DDNS •...

  • Page 34: Power And Electrical Specifications

    5023-110 Power and electrical specifications Printing states C500n Average power while printing Continuous printing 670 W Power consumption, standby Power saver on 35 W Power saver off 200 W Maximum current while printing 115 Volts 11 A 230 Volts Average current while printing 115 Volts 6.5 A...

  • Page 35: Printer Identification

    5023-110 Printer identification Top cover assembly Operato panel/cover Rear cover assembly Paper Release stopper lever Release lever Front cover Right cover Paper tray Front view Left cover Power switch AC input inlet Back view 1-13 General information...

  • Page 36: Printer Theory Of Operation

    5023-110 Printer theory of operation The following diagram shows the major parts of the printer and paper path. 1-14 Service Manual...

  • Page 37: Printer Paper Path

    5023-110 Printer paper path The following illustration shows the paper path and the associated paper jam messages for jams at specific points in the paper path. The printer depicted in the illustration has a duplex unit and secondary paper feed assembly installed: Top Cover Paper Exit Roller...

  • Page 38: Printer Systems Description

    5023-110 Printer systems description See the illustration “Printer component systems” on page 1-17, for more information. Basic principles of color printing Color printing is made through the subtractive process of combining the three primary colors: yellow, magenta, and cyan. Mechanical and electrical structures This color laser printer consists of five engineering systems: print, transfer, optical, paper transport, and control system.

  • Page 39: Printer Component Systems

    5023-110 Printer component systems 1-17 General information...

  • Page 40: Basic Process Of Color Printing

    5023-110 Basic process of color printing 1. This printer has a toner cartridge for each color — yellow, magenta, cyan, and black. 2. The toner image is developed with primary colors and then transferred to the transfer belt for color combination.

  • Page 41: Print System And Transfer System

    5023-110 Print system and transfer system This illustration shows the basic structure of the print system having the OPC belt as a main function, and the transfer system including the transfer belt. A color print is accomplished by actuating each process in the print system and the transfer system.

  • Page 42: Structure Of Opc Belt (Photo Developer Cartridge)

    5023-110 Structure of OPC belt (photo developer cartridge) The OPC belt consists of a surface layer having an optical photoconductor (OPC) of organic material, the inner layer consists of an insulator material (PET), and the aluminum deposit layer in between. The OPC belt is a main part of the print system.

  • Page 43: Basic Structure Of The Print System

    5023-110 Basic structure of the print system The print system process consists of the following: 1. The OPC belt is biased to the -CBV(V) by power supply CBV. 2. The OPC belt is then evenly charged to the negative high voltage by the OPC charging system. The charging system consists of a charging brush that is biased by power supply CHV and a discharge roller that is biased by power supply DCV.
  • Page 44 5023-110 5. Variation of the OPC belt potential: a. The OPC belt is biased to -CBV(V). b. The OPC belt surface is evenly charged to -Vo(V) during the charging process. c. During the exposing process, the optical unit emits a laser beam that strikes the OPC belt surface forming an electrostatic image.

  • Page 45: Details Of The Print System

    5023-110 Details of the print system Charging process In the charging process, the OPC belt is evenly charged by the charger. See “Printer theory of operation” on page 1-14 for charger unit location. The charger unit consists of a charging brush and a discharge roller. 1.

  • Page 46: Exposing Process

    5023-110 Exposing process In the exposing process, the OPC belt surface is exposed to the laser light which forms an electrostatic latent image. The luminous source of the laser is a semiconductor laser. See “Printer theory of operation” on page 1-14 for optical unit location. The laser light scans the OPC belt, forming an electrostatic latent image.

  • Page 47: Developing Process

    5023-110 Developing process In the developing process, an electrostatic latent image attracts printer toner and becomes visible on the OPC belt. There are four toner cartridges. See “Printer theory of operation” on page 1-14 for toner cartridges location. The toner cartridges are located in the printer from top to bottom in the order of black, yellow, magenta, and cyan.

  • Page 48: First Transfer (Drum) Process

    5023-110 3. Developing is processed by toner adhering to the OPC belt due to the attraction between the toner and the -VR(V) charge at the exposed area of OPC belt. The toner image becomes visible on the OPC belt. Note: No developing takes place on the non-exposed area because the potential of toner and that of the non-exposed area of the OPC belt is an identical pole and therefore, repels.

  • Page 49: Belt Discharge (Erase Lamp) Process

    5023-110 4. The toner image is then transferred to paper. Belt discharge (erase lamp) process Electrical belt cleaning is accomplished by an erase lamp radiating on the OPC belt. Radiation discharges the residual charge -VR(V) remaining on the belt after the first transfer process. Electrical cleaning occurs after each toner color transfer.
  • Page 50 5023-110 The residual toner is collected in a waste toner container located by the waste toner feeder. OPC belt OPC belt cleaning (blade) OPC belt discharging First transfer (erase lamp) 1-28 Service Manual...

  • Page 51: Details Of The Transfer System

    5023-110 Details of the transfer system Second transfer (paper) process In the second transfer process, the toner image on the transfer belt is transferred to paper. See “Printer theory of operation” on page 1-14 for second transfer roller location. The transfer roller, normally separated from the transfer belt, is positively biased by the power supply THV. The transfer roller contacts the transfer belt as paper passes between the transfer roller and the transfer belt.

  • Page 52: Transfer Belt Cleaning Process

    5023-110 Transfer belt cleaning process The residual toner on the surface of the transfer belt is removed after the paper transfer process. See “Printer theory of operation” on page 1-14 for transfer belt cleaner unit location. The belt cleaner brush is a semiconductor-type fur brush. The cleaning roller is charged by voltage FCBV. The resistance of the cleaning brush against the cleaning roller charges the brush.

  • Page 53: Details Of The Optical System

    5023-110 Details of the optical system In the optical system process, the printer utilizes a semiconductor laser diode as a light source. This laser diode is controlled by fast switching which matches the transmitted image data (video signal). The generated laser light scans the OPC belt through a polygon mirror and lens. The electrostatic latent images are formed on the OPC belt.

  • Page 54: Details Of The Paper Transportation System

    5023-110 Details of the paper transportation system In the paper transportation process, paper is automatically fed by the pick-up roller and transported to the registration roller. The registration roller synchronizes with the transfer belt. The registration roller transports the paper to the transfer roller. During the transfer process, the transfer roller forwards the paper to the fuser rollers.

  • Page 55: Fusing Unit

    5023-110 Fusing unit The fusing unit utilizes a thermal fusing system that contains a heated fusing roller and a belt-like backup roller. The heated roller contains an inner heating element. The backup roller contains three pressure members located behind the belt. Paper carrying a toner image passes between the rollers where heat and pressure are applied to the paper to fuse the toner to the paper.

  • Page 56: Fusing Process

    5023-110 Fusing process 1. When the paper reaches the fuser, the toner image is transferred on the paper, but not yet fused to the paper. 2. The transported paper passes between the heated roller and the back-up roller. The heated roller’s temperature is approximately 338°F (170°C).

  • Page 57: Control System Structure

    5023-110 Control system structure Electrical system and function The engine board controls most of the main electrical parts in this printer. Control process Function Print process control Controls print process from paper feed through paper exit. Laser output control Automatically controls laser output to the default. Fuser temperature control Controls fuser heater, allowing heated roller to reach default temperature.

  • Page 58: Print Sequence Diagram

    5023-110 Print sequence diagram 1-36 Service Manual...

  • Page 59: Laser Drive Control Circuit

    5023-110 Laser drive control circuit The laser drive control circuit (LDC) consists of a video signal input circuit, laser drive circuit, laser diode, output sensing circuit, and output control circuit. See the illustration. 1. When the video signal is received, the laser drive control circuit switches the laser diode switch on and radiates according to the video signal.
  • Page 60 5023-110 1-38 Service Manual...

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