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Service.bk Page i Thursday, October 4, 2001 12:20 PM
C910 Color Printer
5055-01X
• Table of Contents
Start Diagnostics
Safety and Notices
Trademarks
Index
Manuals Menu
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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Service.bk Page ii Thursday, October 4, 2001 12:20 PM 5055-01x Edition: November 2001 The following paragraph does not apply to any country where such provisions are inconsistent with local law: LEXMARK INTERNATIONAL, INC. PROVIDES THIS PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or implied warranties
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Service.bk Page iii Thursday, October 4, 2001 12:20 PM 5055-01x Contents Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix Safety Notice . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Maintenance Approach . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Standard Inspection and Cleaning Pro
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Service.bk Page iv Thursday, October 4, 2001 12:20 PM 5055-01x Diagnostic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1 Adjustments and Procedures Following Parts Replacement . . . .2-1 Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3 Initial Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-3 Printer Messages . . . . . . . . . . . . . . . . . . . . . . . .
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Service.bk Page v Thursday, October 4, 2001 12:20 PM 5055-01x Repair Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Service Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Handling Printed Circuit Boards . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3 High Capacity Paper Feed Timing Belt Adjustment. . .
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Service.bk Page vi Thursday, October 4, 2001 12:20 PM 5055-01x Registration Frame, Registration Clutch Removal . . . . . . . . . . .4-29 Transfer Belt Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-30 Belt Up/Down Detection Sensor Removal. . . . . . . . . . . . . . . . . .4-34 Sensor Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-35 Density Sensor Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4-36 Separation Fing
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Service.bk Page vii Thursday, October 4, 2001 12:20 PM 5055-01x Duplex Pressure Roller and Solenoid Removal. . . . . . . . . . . . . 4-73 Duplex Feed Roller And Solenoid Removal. . . . . . . . . . . . . . . . 4-73 Duplex Side Fence Motor Assembly / Side Fence Removal . . . 4-74 Duplex Paper Carrying Motor Removal . . . . . . . . . . . . . . . . . . . 4-75 HCPF Covers Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-76 HCPF Call Roller, Paper Feed Roller, Reverse Roller
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Service.bk Page viii Thursday, October 4, 2001 12:20 PM 5055-01x Parts Catalog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1 How to Use This Parts Catalog . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1 Assembly 1: Covers 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-2 Assembly 2: Covers 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-4 Assembly 3: Covers 3 . . . . . . . . . . . . . . . . . .
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Service.bk Page ix Thursday, October 4, 2001 12:20 PM 5055-01x Safety Information Safety Notice • This product is designed, tested and approved to meet strict global safety standards with the use of specific Lexmark components. The safety features of some parts may not always be obvious. Lexmark is not responsible for the use of other replacement parts. The maintenance information for this product has been prepared for use by a professional service person and is not intended to be us
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Service.bk Page x Thursday, October 4, 2001 12:20 PM 5055-01x Norme di sicurezza Il prodotto è stato progettato, testato e approvato in conformità a severi standard di sicurezza e per l’utilizzo con componenti Lexmark specifici. Le caratteristiche di sicurezza di alcune parti non sempre sono di immediata comprensione. Lexmark non è responsabile per l’utilizzo di parti di ricambio di altri produttori. Le informazioni riguardanti la manutenzione di questo prodotto sono indirizzate so
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Service.bk Page xi Thursday, October 4, 2001 12:20 PM 5055-01x Pautas de Seguridad Este producto se ha diseñado, verificado y aprobado para cumplir los más estrictos estándares de seguridad global usando los componentes específicos de Lexmark. Puede que las características de seguridad de algunas piezas no sean siempre evidentes. Lexmark no se hace responsable del uso de otras piezas de recambio. La información sobre el mantenimiento de este producto está dirigida exclusivamente al
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Service.bk Page xii Thursday, October 4, 2001 12:20 PM 5055-01x Informació de Seguretat Aquest producte està dissenyat, comprovat i aprovat per tal d'acomplir les estrictes normes de seguretat globals amb la utililització de components específics de Lexmark. Les característiques de seguretat d'algunes peces pot ser que no sempre siguin òbvies. Lexmark no es responsabilitza de l'us d'altres peces de recanvi. La informació pel manteniment d’aquest producte està orientada exclusivamen
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Service.bk Page xiii Thursday, October 4, 2001 12:20 PM 5055-01x Safety Information xiii
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Service.bk Page xiv Thursday, October 4, 2001 12:20 PM 5055-01x xiv Service Manual
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Service.bk Page 1 Thursday, October 4, 2001 12:20 PM 5055-01x 1. General Information Maintenance Approach The diagnostic information in this manual leads you to the correct field replaceable unit (FRU) or part. Use the error code charts, symptom index, and service checks to determine the symptom and repair the failure. The removals in the Repair Information chapter may help you identify parts. After you complete the repair, perform tests as needed to verify the repair. Standard Inspecti
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Service.bk Page 2 Thursday, October 4, 2001 12:20 PM 5055-01x Print a Demo page. If additional paper sources are installed, print a Demo page from each of these, (if possible). Note: Failure to print from an additional tray or feeder may imply one or more pins are bent in the mating connector. Return Parts Engineering periodically analyzes returned parts for failure modes. Please Include a printed test (DEMO) page, before and after the repair, and tag any returnable parts with a de
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Service.bk Page 3 Thursday, October 4, 2001 12:20 PM 5055-01x Serial Number Open the front door, the serial number is located as shown. The serial number is also on the menu settings page you can print from the Tests Menu. General Information 1-3
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Service.bk Page 4 Thursday, October 4, 2001 12:20 PM 5055-01x Abbreviations ASIC Application-Specific Integrated Circuit CSU Customer Setup DRAM Dynamic Random Access Memory EPROM Erasable Programmable Read-Only Memory EP Electrophotographic Process ESD Electrostatic Discharge FRU Field Replaceable Unit HVPS High Voltage Power Supply LAN Local Area Network LASER Light Amplification by Stimulated Emission of Radiation LCD Liquid Crystal Display LED Light-Emitting Diode LVPS Low
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Service.bk Page 5 Thursday, October 4, 2001 12:20 PM 5055-01x Processes and Configuration In this printer, the toner of four colors (magenta, cyan, yellow and black) melts and deposits on paper, dots which record color image information. This printing process is called the electrophotography process. Electrophotography Process In the electrophotography process, electrically charged toner, exposes, develops, transfers, and is cleaned with an aluminum photosensitive drum. A photoconductiv
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Service.bk Page 6 Thursday, October 4, 2001 12:20 PM 5055-01x Development Unit Toner forms the electrostatic image on the photosensitive drum during exposure. The single component, non-magnetic toner and the lusterless color toner are weather-resistant, and fade little under ultraviolet rays. This is helpful in saving documents. Toner in the hopper is agitated and supplied to the development roll by the supply roll. A (conductive rubber) doctor blade is fitted to the development roll. To
