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Color JetprinterTM 4079 plus

4079-002

· 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.

4079-00X

Second Edition (May, 1997)
The following paragraph does not apply to the United Kingdom or 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 in certain transactions, therefore, this statement may not apply to you. This publication could include technical inaccuracies or typographical errors. Changes are periodically made to the information herein; these changes will be incorporated in later editions of the publication. Improvements or changes in the products or the programs described in this publication may be made at any time. Publications are not stocked at the address given below; requests for publications should be made to your point of purchase. Comments may be addressed to Lexmark International, Inc., Department D22A/035-3, 740 New Circle Road NW, Lexington, Kentucky 40550, U.S.A. Lexmark may use or distribute any of the information you supply in any way it believes appropriate without incurring any obligation to you. Lexmark is a trademark of Lexmark International, Inc., registered in the United States and/or other countries. Color Jetprinter is a trademark of Lexmark International, Inc. Other trademarks are the property of their respective owners.

©Copyright Lexmark International, Inc. 1995, 1997 All rights reserved.
UNITED STATES GOVERNMENT RESTRICTED RIGHTS This software and documentation are provided with RESTRICTED RIGHTS. Use, duplication or disclosure by the Government is subject to restrictions as set forth in subparagraph (c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.227-7013 and in applicable FAR provisions: Lexmark International, Inc., Lexington, KY 40550 USA.

4079-00X

Contents

1

Notices and Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . vii Safety Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xi General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-1 Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Coated Paper . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Ink Cartridges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Operating Temperatures And Humidity . . . . . . . . . . . . . . . . . 1-2 Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Printer Emulation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Operator Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4 Printhead Capping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6 Adjusting The Printhead Position Lever . . . . . . . . . . . . . . . . . 1-6 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 Diagnostic Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-1 Start . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Error Code Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2 Logged Error Code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3 Operator Codes And Symptom Table . . . . . . . . . . . . . . . 2-8 Service Checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12 Carriage Drive Service Check . . . . . . . . . . . . . . . . . . . . 2-12 Carriage Motor Drive Data Service Check . . . . . . . . . . . 2-13 Carriage Position Service Check . . . . . . . . . . . . . . . . . . 2-14 Check Paper Service Check . . . . . . . . . . . . . . . . . . . . . 2-15 Cover Open Service Check . . . . . . . . . . . . . . . . . . . . . . 2-17 Hard Disk Service Check . . . . . . . . . . . . . . . . . . . . . . . . 2-18 Head Cap Position Service Check . . . . . . . . . . . . . . . . . 2-18 Head Heater Service Check. . . . . . . . . . . . . . . . . . . . . . 2-20 Head Temp/Heat Pulse Service Check . . . . . . . . . . . . . 2-20 Host Print Service Check . . . . . . . . . . . . . . . . . . . . . . . . 2-22 Ink Cartridge Service Check. . . . . . . . . . . . . . . . . . . . . . 2-22 Ink Flow Service Check . . . . . . . . . . . . . . . . . . . . . . . . . 2-24 Ink Sensor Service Check . . . . . . . . . . . . . . . . . . . . . . . 2-26 Logic Board And Related Cables Service Check . . . . . . 2-29 Operator Panel Service Check. . . . . . . . . . . . . . . . . . . . 2-31 Paperfeed Electrical Service Check . . . . . . . . . . . . . . . . 2-32 Paperfeed Mechanical Service Check . . . . . . . . . . . . . . 2-36 Paperfeed Motor Service Check . . . . . . . . . . . . . . . . . . 2-38 Power Supply Service Check . . . . . . . . . . . . . . . . . . . . . 2-39 Print Escapement Service Check. . . . . . . . . . . . . . . . . . 2-41
Contents iii

4079-00X Print Quality Service Check. . . . . . . . . . . . . . . . . . . . . . 2-43 Purge Unit Service Check . . . . . . . . . . . . . . . . . . . . . . . 2-45 RAM (Memory) Service Check . . . . . . . . . . . . . . . . . . . 2-46 Undetermined Problem Service Check . . . . . . . . . . . . . 2-47 Diagnostic Aids . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Testing The Printer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Using The Menu System . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 Operator Test Functions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2 Test Print A . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Print Sample . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Printhead Cleaning Procedures. . . . . . . . . . . . . . . . . . . . 3-4 Printing Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4 Power-on Self Test (Post) . . . . . . . . . . . . . . . . . . . . . . . . 3-7 Controller Diagnostics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9 Paper Load Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10 Printer Wrap Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10 Button Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10 LED Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10 LCD Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10 RAM Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 Last Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 Print Test Page . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 Clean Heads . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 Quick Disk Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 Disk Test/Clean . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 Format Disk . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 Software Version . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11 Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12 Service Adjustment Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12 Repair Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Lubrication Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Handling ESD-Sensitive Parts . . . . . . . . . . . . . . . . . . . . . . . . 4-1 Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Head Gap Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2 Service Adjustment Mode . . . . . . . . . . . . . . . . . . . . . . . . 4-4 Print Position Adjustment . . . . . . . . . . . . . . . . . . . . . . . . 4-6 Service Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 Releasing Plastic Latches . . . . . . . . . . . . . . . . . . . . . . . . 4-9 Ink Tube Servicing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9 Printhead Uncapping and Carriage Centering. . . . . . . . . 4-9 Manual Carriage Centering (No Power) . . . . . . . . . . . . 4-10 Manual Printhead Capping (Disabled Machine) . . . . . . 4-11 Removal Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11 iv

4079-00X Carriage Card, Carriage Card Holder Cover Removal. . 4-12 Carriage Encoder And Paper Width Sensor Removal . . 4-15 Carriage Frame Removal . . . . . . . . . . . . . . . . . . . . . . . . 4-19 Carriage Ribbon Cables Removal . . . . . . . . . . . . . . . . . 4-20 Carriage Cable Handling . . . . . . . . . . . . . . . . . . . . . . . . 4-21 Carriage Shaft, Belt, And Ink Supply Removals. . . . . . . 4-23 Controller Board And Logic Board Removal . . . . . . . . . 4-27 Cover Removals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-28 Hard Disk Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-30 Ink Cartridge Assembly Removal . . . . . . . . . . . . . . . . . . 4-31 Inner Cover Spur Unit Removal . . . . . . . . . . . . . . . . . . . 4-34 Lower Frame Removal . . . . . . . . . . . . . . . . . . . . . . . . . . 4-35 Operator Panel Removal . . . . . . . . . . . . . . . . . . . . . . . . 4-36 Paperfeed And Eject Rollers Removal . . . . . . . . . . . . . . 4-37 Paperfeed Motor Removal . . . . . . . . . . . . . . . . . . . . . . . 4-39 Paper Sensor Removal . . . . . . . . . . . . . . . . . . . . . . . . . 4-39 Pickup Roller, Paper Lifting Plate Removal . . . . . . . . . . 4-41 Pinch Roller Base Unit Removal . . . . . . . . . . . . . . . . . . 4-42 Platen Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-44 Power Supply Removal . . . . . . . . . . . . . . . . . . . . . . . . . 4-45 Printhead, Printhead Cover Removal. . . . . . . . . . . . . . . 4-46 Print Timing Slit Removal . . . . . . . . . . . . . . . . . . . . . . . . 4-47 Purge Unit Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49 Separation Sheet Removal . . . . . . . . . . . . . . . . . . . . . . 4-50 Connector Locations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5-1 Carriage Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1 Right Connector Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Left Connector Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2 Control Card 4079 - 001 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-3 Control Card 4079 - 002 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-4 Logic Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-5 Ink Supply Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6 Paper Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7 Preventive Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6-1 Safety Inspection Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-1 Lubrication Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2 Parts Catalog . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7-1 How To Use This Parts Catalog . . . . . . . . . . . . . . . . . . . . . . . 7-1 Covers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2 Covers (Cont.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4 Inner Cover. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-6 Printer Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8 Power Supply and Control Panel . . . . . . . . . . . . . . . . . . 7-10
Contents v

4079-00X Carriage and Printhead . . . . . . . . . . . . . . . . . . . . . . . . . 7-12 Base . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-14 Purge Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-16 Print Timing Encoder . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-18 Carriage Ink Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-20 Carriage Drive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-22 Carriage Drive Frame . . . . . . . . . . . . . . . . . . . . . . . . . . 7-24 Ink Supply Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-26 Ink Return Unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-28 Ink Cartridge Interlock . . . . . . . . . . . . . . . . . . . . . . . . . . 7-30 Sheetfeed Entry. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-32 Sheetfeed Pinch Roller . . . . . . . . . . . . . . . . . . . . . . . . . 7-34 Paperfeed/Ejector Roller . . . . . . . . . . . . . . . . . . . . . . . . 7-36 Sheetfeed Separation . . . . . . . . . . . . . . . . . . . . . . . . . . 7-38 Paperfeed Frame. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-40 Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-42 Hard Disk and Options . . . . . . . . . . . . . . . . . . . . . . . . . 7-44 Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . X-1

vi

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Notices and Safety Information
Safety Information
·
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 used by others. There may be an increased risk of electric shock and personal injury during disassembly and servicing of this product. Professional service personnel should understand this and take necessary precautions.

· ·

Consignes de Sécurité
·
Ce produit a été conçu, testé et approuvé pour respecter les normes strictes de sécurité globale lors de l'utilisation de composants Lexmark spécifiques. Les caractéristiques de sécurité de certains éléments ne sont pas toujours évidentes. Lexmark ne peut être tenu responsable de l'utilisation d'autres pièces de rechange. Les consignes d'entretien et de réparation de ce produit s'adressent uniquement à un personnel de maintenance qualifié. Le démontage et l'entretien de ce produit pouvant présenter certains risques électriques, le personnel d'entretien qualifié devra prendre toutes les précautions nécessaires.

· ·

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 soltanto al personale di assistenza autorizzato. Durante lo smontaggio e la manutenzione di questo prodotto, il rischio di subire scosse elettriche e danni alla persona è più elevato. Il personale di assistenza autorizzato, deve, quindi, adottare le precauzioni necessarie.

· ·

Notices and Safety Information

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4079-00X

Sicherheitshinweise
·
Dieses Produkt und die zugehörigen Komponenten wurden entworfen und getestet, um beim Einsatz die weltweit gültigen Sicherheitsanforderungen zu erfüllen. Die sicherheitsrelevanten Funktionen der Bauteile und Optionen sind nicht immer offensichtlich. Sofern Teile eingesetzt werden, die nicht von Lexmark sind, wird von Lexmark keinerlei Verantwortung oder Haftung für dieses Produkt übernommen. Die Wartungsinformationen für dieses Produkt sind ausschließlich für die Verwendung durch einen Wartungsfachmann bestimmt. Während des Auseinandernehmens und der Wartung des Geräts besteht ein zusätzliches Risiko eines elektrischen Schlags und körperlicher Verletzung. Das zuständige Fachpersonal sollte entsprechende Vorsichtsmaßnahmen treffen.

· ·

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 personal cualificado de mantenimiento. Existe mayor riesgo de descarga eléctrica y de daños personales durante el desmontaje y la reparación de la máquina. El personal cualificado debe ser consciente de este peligro y tomar las precauciones necesarias.

· ·

viii Service Manual

4079-00X

Informações de Segurança
·
Este produto foi concebido, testado e aprovado para satisfazer os padrões globais de segurança na utilização de componentes específicos da Lexmark. As funções de segurança de alguns dos componentes podem não ser sempre óbvias. A Lexmark não é responsável pela utilização de outros componentes de substituição. As informações de segurança relativas a este produto destinam-se a profissionais destes serviços e não devem ser utilizadas por outras pessoas. Risco de choques eléctricos e ferimentos graves durante a desmontagem e manutenção deste produto. Os profissionais destes serviços devem estar avisados deste facto e tomar os cuidados necessários.

· ·

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 exclusivament a professionals i no està destinada a ningú que no ho sigui. El risc de xoc elèctric i de danys personals pot augmentar durant el procés de desmuntatge i de servei d'aquest producte. El personal professional ha d'estar-ne assabentat i prendre les mesures convenients.

· ·

Notices and Safety Information

ix

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Chinese Safety Information

Korean Safety Information

x Service Manual

4079-00X

Preface
This service manual is designed to be used by printer repair technicians during servicer training and when repairing a failing printer. The technician should first understand the failing symptom. Then begin at "Start" (page 2-1) in this service manual and follow the steps to diagnose and fix the failure. This manual is divided into the following chapters: 1. "General Information" introduces the printer. 2. "Diagnostic Information" includes the procedures that give you step-by-step instructions to isolate the failing FRU. 3. "Diagnostic Aids" includes test procedures that are used to diagnose problems and test the machine after repairs have been made. 4. "Repair Information" shows how to change the failing FRU and make necessary adjustments. 5. "Connector Locations" shows how to find test points and illustrates the paper paths and ink supply system. 6. "Preventive Maintenance" includes suggestions for maintaining the printer. 7. "Parts Catalog" lists the part numbers for the FRUs.

Notices and Safety Information

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1. General Information
This chapter introduces and describes the LexmarkTM Color JetrinterTM 4079 plus, the tools needed to repair it, and the customer switch settings that control the features of the printer.

Description
The Color Jetprinter is a tabletop four-color inkjet printer for draft or letter quality applications in an attended PC attach environment. This printer uses four printheads with 64 nozzles each to produce both letter-quality and draft output. Graphics resolution is available up to 360 dots-per-inch (dpi), depending on the printer menu selection and application. The printer prints in one direction only when printing graphic images. You may use cut-sheet paper up to 297 mm (11.7 in.) by 432 mm (17.0 in.).

Coated Paper
Special coated papers are recommended for best printing results. Included with each supply of paper is a special brown cleaning sheet called maintenance paper. After printing a number of pages, print the nozzle test on this paper in order to clean the pickup and feed rollers. After 2000 pages, wipe the platen and inside of the print cover to remove any ink mist that may accumulate and prevent staining of the print paper. The capacity of the paper tray is approximately 100 sheets of coated letter-size paper. Envelopes and postcards can be fed from the paper tray as well. An easy-to-use operator panel on the front of the printer provides control of print resolution and style.

General Information

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4079-00X

Ink Cartridges
Each ink cartridge contains 30 grams of liquid ink, and is rated for as much as 700 pages of text. Each color cartridge is physically coded to fit in its own color slot. Also, the ink cartridge has an electronic label which is sensed by the cartridge sensor. The ink is nontoxic, but contains isopropyl alcohol and should not be swallowed or gotten in the eyes. It will permanently stain clothing. To prevent ink leaks, always ship the printer with the ink cartridges installed, and with the carriage locked in place. Also make sure the four printheads are capped before switching the printer off. A star (*) is displayed when the heads are automatically capped.

Operating Temperatures And Humidity
Temperature and humidity levels are important to the correct operation of the printer. The ranges are: Temperature 15-30° C (59-86° F) Humidity 5-95% (no condensation)

Tools
The removal and adjustment procedures described in this manual require the following tools and equipment:

· · · · · · ·

Phillips screwdriver (small) Flat-blade screwdriver Fuse puller Analog volt ohmmeter(1) (a digital volt ohmmeter may also be used). Feeler gauge for head gap adjustment Syringe Drop cloth
General Information 1-2

4079-00X

· · ·

Grease Cleaning tissue Magnifier

Refer to the parts catalog for part numbers of special tools. When taking voltage readings, always use frame ground unless another ground is specified. When you use the syringe, clip the end of the tip so it will fit over the small tube connectors and into the ink joints. NOTE: Be careful not to separate the syringe plunger from the body of the syringe. The ink may leak and stain clothing and other items. Make sure the machine is in a suitable service area and place a drop cloth under the machine when you service it.

Printer Emulation
Before you use your printer with most software programs, you must select the appropriate printer driver from that program's printer selection menu. When you select a printer from the list, a driver is installed that allows your documents to be printed correctly on your printer. If the printer does not appear on the list in your program, you can use any of the following printer driver emulations, listed here in the order of their priority. Choose the first printer on the list that appears in your program's list of printers.
PRIORITY 1 2 PRINTER

1 QMS ColorScript 100 (Postscript mode) Seiko ColorPoint PS Model 14 If none of these choices appear in your software, you may choose another PostScript printer. However, if you choose a non-color printer, your output will have only black print.

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4079-00X

Operator Panel
You can access various printing functions and options using the printer's operator panel.

Indicators There are several indicators in the operator panel that show the status of the machine. Display This 2-line liquid crystal display (LCD) shows the printer's status, menu items and error messages. For example, a star (*) is displayed when the printheads are capped. Ready This indicator is on when the printer is on-line and is off when the printer is off-line. The Ready indicator is turned off when Start/ Stop is pressed, when there is a check condition such as out-ofpaper, or when Menu has been pressed to display the menu. Buffer This indicator blinks when data is being received by the printer. When the buffer indicator is on solid, it indicates the buffer is full or a partial page is stored. Press Print Buffer to print the stored page. Check The Check indicator lights up when the printer requires operator intervention, such as ink or paper problems. An error message will also be displayed, indicating the type of problem.

General Information 1-4

4079-00X Buttons Five buttons on the operator panel control the printer. There are two operations for each button, depending on the state of the printer and whether Alt is pressed. 1. Menu and Menu Press Menu to display the menu system, whether the printer is Ready or Not-Ready. If a job is active, the Ready indicator is turned off, and the menu is displayed after the current job has completed printing. If the menu is already active, pressing Menu displays the next menu item on the top line of the display. Menu - is accessed by pressing Alt + Menu, and moves to the previous menu item. 2. List+ and List When the menu is active, these buttons display the list of items on the second line of the display. Press Alt + List+ (List - to move to the previous list item. 3. Select And Return Select only operates when the menu is active. If the top line of the menu is active, pressing Select causes the lower line to become active. If the lower line of the menu is active, pressing Select selects the current value being displayed. If the current value is a function, such as printing a test, it is executed. If the current value is a setting, such as High Speed, it becomes the permanent default. Return is activated by pressing Alt + Select and it only operates when the menu is active. If the lower line of the display is active, pressing Alt causes the upper line of the display to become active. If the upper line of the display is active, pressing Alt exits the menu system in the Not-Ready state. 4. Start/Stop and Reset If the Ready light is on, pressing Start/Stop turns off the Ready light and the printer stops processing information. The current job will be interrupted. 1-5

4079-00X If the Ready light is off, pressing Start/Stop turns on the Ready light and the printer is ready to receive information. When Alt + Reset is pressed, the printer returns to its power-on status. 5. Print Buffer and Alt Print Buffer prints the contents of the print buffer, if any. When the Buffer indicator is on solid, the buffer contains a partial page of information. Alt is used to access the secondary function on the other buttons by pressing and holding Alt while pressing another button.

Printhead Capping
The printheads are capped automatically after they have been in the home position for a few seconds. When the printheads are capped, a star (*) appears in the display. Do not turn the printer off without the heads being capped. If the heads are left uncapped, the ink dries out and print quality is affected.

Adjusting The Printhead Position Lever
The printhead position lever is the green lever attached to the carriage. For optimum print quality, make sure this lever is adjusted according to the density of the ink in the document and the thickness of the paper being used. Setting the lever at position 1 sets the distance between the printhead and the paper at the minimum distance. Follow these recommendations: Position 1: Use for normal documents with normal ink density on the paper. Position 2: Use for documents with densely inked graphics. Position 3: Use for envelopes or thick paper, or for documents with very densely inked graphics.

General Information 1-6

4079-00X If the head is positioned too close to thick paper, envelopes, or densely inked graphics, the ink could be smeared. In general, keep the head position as close as possible to the paper. Also, be sure that quality coated paper is being used for best print quality.

Abbreviations
ASIC CSU DRAM EEPROM EP ESD FRU HVPS LAN LASER LCD LED LVPS NVRAM OEM PICS PIXEL POR POST PQET RIP ROS SRAM UPR VAC VDC Application-Specific Integrated Circuit Customer Setup Dynamic Random Access Memory Electrically Erasable Programmable ReadOnly Memory Electrophotographic Process Electrostatic Discharge Field Replaceable Unit High Voltage Power Supply Local Area Network Light Amplification by Stimulated Emission of Radiation Liquid Crystal Display Light-Emitting Diode Low Voltage Power Supply Nonvolatile Random Access Memory Original Equipment Manufacturer Problem Isolation Charts Picture Element Power-On Reset Power-On Self Test Print Quality Enhancement Technology Raster Image Processor Read-Only Storage Static Random Access Memory Used Parts Replacement Volts alternating current Volts direct current

1-7

4079-00X

2. Diagnostic Information Start
When the covers are removed, you will get a Cover Open error code. To prevent this, tape the cover open interlock arm in the closed position on the operator panel. All voltages in the service checks are positive unless otherwise noted. When measuring voltages, always use frame ground unless otherwise specified. Visually check the machine for obvious problems such as ink leakage, and worn or missing parts. Also reseat all cables, and check for good connections. Note the error code number, if one is displayed in the operator panel, and the number of beeps sounded. If you have an error code, go to the "Error Code Table" on page 2-2 and follow the instructions for that error code. If no error code is present, check the NVRAM for the Last Error code. (See the procedure in "Controller Diagnostics" on page 3-9). If no error code number is displayed, or you cannot access Controller Diagnostics to check the last error code, or you have no clear symptom, continue with this Start procedure. If you proceed through Start, the Error Code Table, and the Operator Codes and Symptom Table without determining an error code or symptom, go to "Undetermined Problem Service Check" on page 2-47 and then return here to Start. When a service check instructs you to end the call, you should run "Test Print A" on page 3-3. Check the following: 1. Turn the printer off. Make sure the carriage lock is disengaged, then turn the printer on. If there is no indication of power in the printer, go to the "Power Supply Service Check" on page 2-39.

Diagnostic Information

2-1

4079-00X 2. If the printer has power but does not complete POST, with Ready on the display, go to the "Operator Panel Service Check" on page 2-31. 3. Run Test Print A. To enter Controller Diagnostics, press and hold Menu and Print Buffer while turning on the printer. After the POST is complete, the first item in the Controller Diagnostics menu is displayed. Use coated paper if available. If you use regular paper, allow for some color convergence. If an error code or detectable symptom occurs, go to the "Error Code Table". If you have a symptom only, go to the "Operator Codes And Symptom Table" on page 2-8. 4. Turn the printer off and connect it to a host computer. Turn the printer on and send data from the computer to the printer. You can use the test print for this. If the data does not print as it was sent, go to the "Host Print Service Check" on page 2-22.

Error Code Table
To use this error code table: 1. Turn off the printer, wait four or more seconds, then turn on the printer. 2. Note any error code number that appears in the display, look for that code in the tables below, and take the indicated action. · If two error codes are listed in the table: the top number is displayed if the controller board is installed; the bottom number is displayed if the controller board is removed. · Some error codes are operator-correctable. See "Operator Codes And Symptom Table" on page 2-8. · Other codes indicate the printer is performing an operation; no action is needed. For example, "04 Reset", or "05 Self Test" means the printer is running POST. 3. If no error code is displayed, count the number of beeps and look for that number in the tables. 4. If no error code is displayed, and no beeps are heard, look for the symptom in the table and take the indicated action. 5. If you are unable to correct the problem using this index, go to the "Undetermined Problem Service Check" on page 2-47. Note: If POST fails and a message is displayed, disregard the message and count the number of beeps.

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4079-00X

Logged Error Code
If no error code number is displayed, you can enter Controller Diagnostics mode and check for Last Error code number. See "Controller Diagnostics" on page 3-9.
Code 101 65 No Of Beeps Or Symptom 1 Beep - ROM error Action Or Failing Fru Logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment. Logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment.

102 65

2 Beeps - RAM error

103 65

3 Beeps - Printer controller

Logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment.

104 65

4 Beeps -

Logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment.

105 65 106 65

5 Beeps 6 Beeps -

"Logic Board And Related Cables Service Check" on page 2-29. "Logic Board And Related Cables Service Check" on page 2-29.

Diagnostic Information 2-3

4079-00X

Code 107 65 none

No Of Beeps Or Symptom 7 Beeps No Beeps - Operator panel does not work correctly (buttons or display) 8 Beeps - Read/write error 10 Beeps - NVRAM error 10 Beeps - Controller carriage motor disable

Action Or Failing Fru "Logic Board And Related Cables Service Check" on page 2-29. "Operator Panel Service Check" on page 2-31. Logic board Logic board Logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment. Logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment. Logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment. Logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment. Logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment.

108 65 109 68 125 72

126 72

10 Beeps - Communications error

127 72

10 Beeps - Communications error

128 72

10 Beeps - Communications error

128 72

10 Beeps - Communications error

2-4

4079-00X
Code 138 61 No Of Beeps Or Symptom 10 Beeps - ROM error Action Or Failing Fru Logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment. Logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment. Logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment. Logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment. Logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment. "Head Heater Service Check" on page 2-20. "Head Heater Service Check" on page 2-20. "Head Heater Service Check" on page 2-20. "Head Heater Service Check" on page 2-20. "Head Temp/Heat Pulse Service Check" on page 2-20.

none, 63

10 Beeps - RAM error

none, 66

10 Beeps - Printer controller error

none, 72

10 Beeps - Communications error

none, 40

10 Beeps - Communications error

110 55 111 54 112 53 113 52 120 55

10 Beeps - Yellow head heat-pulse resistance error 10 Beeps - Magenta head heat-pulse resistance error 10 Beeps - Cyan head heatpulse resistance error 10 Beeps - Black head heatpulse resistance error 10 Beeps - Yellow head temperature detection error

Diagnostic Information 2-5

4079-00X

Code 121 54 122 53 123 52 124 5F

No Of Beeps Or Symptom 10 Beeps - Magenta head temperature detection error 10 Beeps - Cyan head temperature detection error 10 Beeps - Black head temperature detection error 10 Beeps - Printer internal temperature error - Check installation temperature standards 10 Beeps - Carriage motor drive data error 10 Beeps - Cap position error 10 Beeps - Linear encoder error 10 Beeps - Home position detection error 10 Beeps - Carriage motor over-current error 10 Beeps - POST does not complete 10 Beeps - Complete POST; Test Print A will not run 10 Beeps - Yellow head heater error 10 Beeps - Magenta head heater error 10 Beeps - Cyan head heater error 10 Beeps - Black head heater error 10 Beeps - Yellow head ink sensor error

Action Or Failing Fru "Head Temp/Heat Pulse Service Check" on page 2-20. "Head Temp/Heat Pulse Service Check" on page 2-20. "Head Temp/Heat Pulse Service Check" on page 2-20. Check installation temperature standards. "Carriage Motor Drive Data Service Check" on page 2-13." "Carriage Motor Drive Data Service Check" on page 2-13. "Head Cap Position Service Check" on page 2-18. "Print Escapement Service Check" on page 2-41. "Print Escapement Service Check" on page 2-41. "Carriage Position Service Check" on page 2-14. "Carriage Position Service Check" on page 2-14. "Carriage Motor Drive Data Service Check" on page 2-13. "Head Heater Service Check" on page 2-20. "Head Heater Service Check" on page 2-20. "Head Heater Service Check" on page 2-20. "Head Heater Service Check" on page 2-20. "Ink Sensor Service Check" on page 2-26.

12C, 5F 12A, 51 12B, 50 12D, 50 12E, 5E 12F 5E 12F 5F 130 59 131 58 132 57 133 56 134 5D

2-6

4079-00X
Code 135 5C 136 5D 137 5A 901 941 945 No Of Beeps Or Symptom 10 Beeps - Magenta head ink sensor error 10 Beeps - Cyan head ink sensor error 10 Beeps - Black head ink sensor error Insufficient memory to run POST Incorrect checksum (EPROM) Controller board failure Action Or Failing Fru "Ink Sensor Service Check" on page 2-26. "Ink Sensor Service Check" on page 2-26. "Ink Sensor Service Check" on page 2-26. "RAM (Memory) Service Check" on page 2-46. EPROM Controller board (J7), RAM (J8) (4079-002) Controller board. Be sure to transfer the EPROM controller card and memory SIMMs from the old board to the new one. Controller board. Be sure to transfer the EPROM controller card and memory SIMMs from the old board to the new one. Controller board. Be sure to transfer the EPROM controller card and memory SIMMs from the old board to the new one. Controller board. Be sure to transfer the EPROM controller card and memory SIMMs from the old board to the new one. Controller board. Be sure to transfer the EPROM controller card and memory SIMMs from the old board to the new one. Controller board. Be sure to transfer the EPROM controller card and memory SIMMs from the old board to the new one. Controller board RAM (J5 or J8) Memory SIMM failure, J8

946

Controller board failure

950

Controller board failure

951

Controller board failure

952

Controller board failure

953

Controller board failure

960 961

Memory error Memory Error

Diagnostic Information 2-7

4079-00X

Code 980 991

No Of Beeps Or Symptom Incorrect checksum (EPROM) 8 Beeps - communications error

Action Or Failing Fru Controller board EPROM (J6), RAM (J5 or J8) "Undetermined Problem Service Check" on page 2-47.

Operator Codes And Symptom Table
The following code numbers are operator instructions and messages. In some cases, no action is required; others are operator-correctable; others may require service. An error code may require up to one minute to appear. Some symptoms may not generate an error code. Locate your symptom in the table and take the indicated action. .
Code 05 06 07 08 Beeps - Symptom Power-on self-test (POST) is being performed. Print test or other menu function being performed. Printhead cleaning operation being performed. Page Postscript due to language error; ending when End of Job is found. Printhead refresh operation being performed. A key was pressed that is currently not active. Paper feeds into printer, then jams; error code displayed when carriage moves from home position when printing Test Print A. Paper too short to print data; extra data will be discarded. Action Or Fru No Action No Action No Action No Action

09 Not Active 22 13

No Action Release the key. Wait until the key is active. Check and clear paper path. If error persists, go to "Paperfeed Electrical Service Check" on page 2-32. Use correct length paper.

23

2-8

4079-00X
Code 31 Beeps - Symptom Paper loaded is incorrect size; correct size indicated on second line of display. Paper tray empty or paper did not feed; POST completes, tries to feed paper when printing Test Print A; paperfeed motor does not rotate. Paperfeed problem; more than one sheet feeds into printer; pickup plate repeatedly raises and lowers while printing. No pickup of paper; paperfeed roller turning normally. Paper skews. Action Or Fru Change paper size loaded.

36 10

Load paper tray. If error persists, go to "Check Paper Service Check" on page 2-15.

none

"Paperfeed Mechanical Service Check" on page 2-36.

none none

"Paperfeed Mechanical Service Check" on page 2-36. "Paperfeed Mechanical Service Check" on page 2-36. Paper tray overloaded; wrong type of media used or selected. Printhead cover not in place correctly. "Paperfeed Electrical Service Check" on page 2-32.

none

1 Beep - completes POST. A bumping or scraping noise is heard during printing. 1 Beep - completes POST. When Test Print A is run, printer feeds paper into printer; error code appears at different positions of carriage Paper sticks together. Top cover open Insufficient printer memory to print page

36

none 30 12 38, SIMMS

Fan paper; put less in paper tray. "Cover Open Service Check" on page 2-17. Make page less complicated. Add memory to printer.

Diagnostic Information 2-9

4079-00X

Code 54

Beeps - Symptom Serial error (framing or parity) detected; possibly the serial link is set up incorrectly.

Action Or Fru Press Start/Stop to continue. Once the serial error has been displayed, serial error reporting is suppressed until interface parameters are changed or printer is powered off. "Ink Sensor Service Check" on page 2-26. "Ink Sensor Service Check" on page 2-26. "Ink Sensor Service Check" on page 2-26. "Ink Sensor Service Check" on page 2-26. "Ink Cartridge Service Check" on page 2-22. "Ink Cartridge Service Check" on page 2-22. "Ink Cartridge Service Check" on page 2-22. "Ink Cartridge Service Check" on page 2-22. No Action No Action Replace the disk. "RAM (Memory) Service Check" on page 2-46. Clean heads. Seat ink cartridges firmly. Check type of media selected. "Print Quality Service Check" on page 2-43. "Ink Flow Service Check" on page 2-24.

60 16 61 16 62 16 63 16 64 14 65 14 66 14 67 14 72 73 74 none none

Black ink cartridge empty Yellow ink cartridge empty Magenta ink cartridge empty Cyan ink cartridge empty Black ink cartridge not installed Yellow ink cartridge not installed Magenta ink cartridge not installed Cyan ink cartridge not installed Disk Full Unformatted Disk Defective Disk Missing data or additional data in print job. Bad print quality; missing dots, white streaks. Ink flow observed through large purge waste lines. Light print followed by voids in print, in one color or all colors; no ink flow through large purge waste lines

none

2-10

4079-00X
Code none Beeps - Symptom Blurring or smudging of print Action Or Fru Printhead position lever too low. Wrong type of media. Wrong print mode selected see "Printing Mode" on page 3-4. Printhead position lever in wrong position see "Adjusting The Printhead Position Lever" on page 1-6."Print Quality Service Check" on page 2-43. "Diagnostic Aids" on page 3-1.

none

Smeared print, poor quality

none

Failing LED or button on operator panel; printer operates normally otherwise. 1 Beep - POST completed, but operator panel does not operate normally No lights or beeps; printer will not begin POST All LEDs are on; POST started; display blank. 8 Beeps - POST started; all LEDs are on, display blank. 10 Beeps - POST started; all LEDs on, display blank. Printer will not print from host computer; Test Print A runs normally. Carrier motor stops in the middle of the writing line. Symptom or error code not listed

none

"Operator Panel Service Check" on page 2-31. "Power Supply Service Check" on page 2-39. "Power Supply Service Check" on page 2-39. "Power Supply Service Check" on page 2-39. "Power Supply Service Check" on page 2-39. Make sure printer is on-line "Host Print Service Check" on page 2-22. Go to the "Paperfeed Electrical Service Check" on page 2-32. "Undetermined Problem Service Check" on page 2-47.

none none none none none

none error code

Diagnostic Information 2-11

4079-00X

Service Checks
Carriage Drive Service Check
Symptom Explanation You have an error code or a failing carriage drive motor. Conditions That Could Cause This Symptom · Carriage motor · Logic board

FRU 1 · Carriage Drive Motor · Carriage Board · Logic Board

Action Check the carriage drive motor winding resistance. Connector pins 5 and 6 are one phase; pins 7 and 8 are the other phase. The resistance should be approximately 0.8 Ohms per phase. If the resistance is incorrect, replace the carriage drive motor.If the resistance is correct, replace the carriage board. If you still have a problem, replace the logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment.

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4079-00X

Carriage Motor Drive Data Service Check
Symptom Explanation You have an error code indicating a carriage drive data error. Conditions That Could Cause This Symptom · · · · · Carriage belt and idler assembly Carriage motor Linear encoder/paper width sensor Carriage board Logic board

Be sure the printer is not installed in an unusually hot or cold environment. See the Lexmark Color Jetprinter 4079 Plus User's Reference for installation standards.
FRU 1 Belt and Idler Assembly · Carriage Motor · Carriage Motor Cable · Linear Encoder/ Paper Width Sensor Action Proper belt tension is required for good escapement. Check the condition of the belt and idler assembly. Replace any damaged or worn parts. The carriage motor and linear encoder/paper width sensor assembly work together to move the carriage and maintain proper escapement. Check the carriage motor cable for continuity and then replace the following FRUs in the order shown to see if the error code is recovered and the machine completes POST. 1. Carriage Motor 2. Carriage Motor Cable 3. Linear Encoder/Paper Width Sensor 3 · Carriage Board · Carriage Ribbon Cable · Logic Board The carriage motor transfers signals to the carriage board on the logic board. If an incorrect signal is received and error code is displayed. Check the continuity of the carriage ribbon cables. If the cables are all right, replace the carriage board. If the error doesn't go away, replace the logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment.

2

Diagnostic Information 2-13

4079-00X

Carriage Position Service Check
Symptom Explanation You have an error code indicating a carriage motor or carriage linear encoder/ paper width sensor error. Conditions That Could Cause This Symptom · · · · · · · · Carriage lock Carriage drive path obstructed Carriage belt or idler Carriage motor Print timing slit Brown carriage ribbon cables Linear Encoder/Paper Width Sensor Logic board

The carriage should attempt to move when the machine is turned on. If it does not, go to the "Carriage Motor Drive Data Service Check" on page 2-13.
FRU 1 Carriage Lock Action The carriage lock is used to hold the carriage in a locked position during shipping or to prevent unauthorized use. Be sure the lock is in the unlocked position. Replace it if it is damaged. Be sure the carriage drive belt and the idler gear are not damaged. The print timing slit has coded carriage escapement identification on it. If the characters are not printed in their correct positions, the timing slit may be damaged and must be replaced. Check for dirt, damage, or folds. The carriage linear encoder checks the position of the carriage by reading timing data on the timing slit. If the linear encoder is failing, the carriage loses position and an error codes is displayed. Check the brown carriage ribbon cables for continuity. If the continuity is incorrect, replace the carriage linear encoder (Asm 9-2).

2

· Carriage Drive Belt · Idler Pulley Print Timing Slit

3

4

· Brown Carriage Ribbon Cables · Carriage Linear Encoder/ Paper Width Sensor

2-14

4079-00X
FRU 5 Logic Board Action If the characters are printed in their correct position and you still receive an error code, replace the logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment.

Check Paper Service Check
Symptom Explanation Paper insertion problems; Paper tries to enter machine; error code 36/10 displayed. Conditions That Could Cause This Symptom · Dust on pickup roller · Paperfeed motor drive · Paper out photo sensor

FRU 1 Pickup Roller

Action A dirty pickup roller can cause paper timing problems. Visually check the paperfeed parts. If necessary, clean the pickup roller with a clean cloth and isopropyl alcohol.

Diagnostic Information 2-15

4079-00X

FRU 2 Paper Out Photo Sensor Paper Out Photo Sensor Cable

Action Check the paper sensor signal at CNPE pin 1 on the right connector card, with the card plugged in.

You can manually feed paper to check this signal. Push the paper lift spring clutch plate (Asm.20-10) to the right, and turn the rear ejector roller (Asm. 18-2). The spring plate is under the carriage shaft to the left of the carriage motor. Voltage should be high (4-5 V dc) when the paper sensor arm blocks the light path (paper is not present). Voltage should be low (<2 V dc) when the paper sensor arm does not block the light path (paper is present). If the voltage is not correct, remove the card cover (asm. 4-8), then adjust the paper out photo sensor holder mounting screw so the sensor is as high in its slot as possible. Check the voltages again. If the voltages are still not correct, replace the paper out photo sensor or the paper out photo sensor cable as needed.

If the symptom remains, replace the logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment.

2-16

4079-00X

Cover Open Service Check
Symptom Explanation The Cover Open message is displayed with the inner cover closed. Conditions That Could Cause This Symptom · Inner cover not closed correctly · Operator panel · Logic board

FRU 1 Inner Cover

Action The inner cover actuates the operator panel cover interlock lever. Check the cover for damage and be sure it can fully close. A damaged or obstructed cover interlock lever located on the operator panel will not allow the cover open sensor to turn off the Open Cover message. Remove any obstructions or replace the operator panel if it is damaged. The Open Cover message is sent from the logic board when the operator panel cover interlock is not pushed down. Push the lever down, if the Open Cover message does not go off, replace the logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment.

2

Operator Panel

3

Logic Board

Diagnostic Information 2-17

4079-00X

Hard Disk Service Check
FRU 1 2 Hard Disk Interface Card Hard Disk Action Be sure the hard disk interface card is correctly installed and not damaged. Enter the Controller Diagnostic Menu Select Disk Menu and run the Quick Disk Test. If you get a failure, replace the hard disk. If you do not have the disk menu in the Diagnostic Menu, check for proper installation of the hard disk and the hard disk interface card.I

Head Cap Position Service Check
Symptom Explanation You have an error code or a purge motor or purge sensor failure. Conditions That Could Cause This Symptom · · · · · Purge motor Purge sensor, cable assembly Purge assembly Left connector cable Logic board

Turn on the printer and observe the purge motor. If the motor does not run, go to the "Purge Unit Service Check" on page 2-45.

FRU 1 Purge Sensor Cable Assembly

Action 1. Center the heads. See "Printhead Uncapping and Carriage Centering" on page 4-9. 2. Turn off the printer. 3. Remove the purge assembly and lay it on its side. Use absorbent material to protect from leaking ink. 4. Check the sensor on the bottom of the purge assembly. If it is broken, or has dirty contacts, replace it.

2-18

4079-00X
FRU 2 Purge Assembly · Left Connector Cable · Logic Board Action Be sure all the ink lines are connected. With the purge assembly removed and laying on its side, check the voltage on the contact straps. The voltage should be +5 V dc with the contacts open. As the contacts close, the voltage should drop to 0 V dc. If the voltage is incorrect, check the continuity of the left connector cable. If the continuity is incorrect, replace the cables as needed. If the continuity is correct, replace the logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment.

Diagnostic Information 2-19

4079-00X

Head Heater Service Check
Symptom Explanation You have a head heater error code. Conditions That Could Cause This Symptom · · · · Carriage board Logic board Printhead Carriage cables

FRU 1 Printhead

Action Use the codes in the"Error Code Table" on page 2-2 to identify the printhead you think may be failing. Be sure the printhead is seated properly and the head cover is fully closed. Check the continuity of the brown carriage cables. Replace if necessary. Replace the carriage board and run Test Print A to check the print quality. If the problem is not corrected, replace the logic board. Be sure to go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment. If the problem is still not corrected, replace the printhead.

2 3

Brown Carriage Cables · Carriage Board · Logic Board · Printhead

Head Temp/Heat Pulse Service Check
Symptom Explanation You have an error code indicating a head temperature error or heat pulse resistance error. Conditions That Could Cause This Symptom · Printhead · Carriage board · Logic board

2-20

4079-00X
FRU 1 · Printhead · Carriage Board Action Use the codes in the"Error Code Table" on page 2-2 to identify the printhead you think may be failing. Be sure the printhead is seated properly and the head cover is fully closed. Check the voltage to the printhead as read by the analog switch IC2 on the carriage board.Check the resistance and voltage between each pin and frame ground. Be sure to turn off the printer when you check resistance. Black Head - pin 12 should read 2k - 4k Ohms, and 1.02 - 5.03 V dc. Black head, pin 4 should read 1.74 - 4.46 V dc. Cyan Head - pin 15 should read 2k - 4k Ohms, and 1.02 - 5.03 V dc. Cyan head, pin 2 should read 1.74 - 4.46 V dc. Magenta Head - pin 14 should read 2k - 4k Ohms, and 1.02 - 5.03 V dc. Magenta head, pin 1 should read 1.74 - 4.46 V dc. Yellow Head - pin 13 should read 2k - 4k Ohms, and 1.02 - 5.03 V dc. Yellow head, pin 5 should read 1.74 - 4.46 V dc.

If the signals are incorrect, replace the defective printhead. If the signals are correct, replace the carriage board.

Diagnostic Information 2-21

4079-00X If the problem is not corrected, replace the logic board. Be sure to go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment.

Host Print Service Check
Symptom Explanation The printer does not communicate with the host computer. Conditions That Could Cause This Symptom · Incorrect protocol set · Controller board

FRU 1 · Incorrect Protocol Set · Controller Board

Action Run Test Print A.To enter Controller Diagnostics, press and hold Menu and Print Buffer while turning on the printer. After the POST is complete, the first item in the Controller Diagnostics menu is displayed. If the test runs successfully, disconnect the serial/ parallel interface cable, install the wrap plug (PN 1319128), and then run the wrap test (see "Paper Load Test" on page 3-10. If the test fails, replace the controller board.

Ink Cartridge Service Check
Symptom Explanation The printer does not sense an ink cartridge when one is installed. Conditions That Could Cause This Symptom · Cartridge detection resistor · Cartridge sensor cable · Cartridge sensor

If you are instructed to remove the ink cartridge assembly, it is recommended that you remove all ink cartridges, carefully drain the ink from the lines into a plastic-lined waste can or absorbent material, then replace the cartridges and wrap a packet of cleaning cloths or paper towels over the connector end, secured with a rubber band.

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4079-00X Keep the assembly on a level plane while servicing with the black cartridge end slightly elevated. Cover any open ink lines with absorbent cloth, secured with a rubber band, when possible.
FRU 1 Ink Cartridge Action The error code should indicate which cartridge is suspected. Check the ink cartridge detection resistor pad (top left of each cartridge). The resistance should be 15K to 25K Ohms. If the resistance is incorrect, replace the ink cartridge. Disconnect the CNID connector from the left connector card. With the ink cartridge installed, check the resistance between the pins designated for each cartridge sensor (pins 1 and 2; 3 and 4; 5 and 6; 7 and 8). Pin 9 is not used. The resistance should be 15K to 25K Ohms. If the resistance is correct, replace the logic board, left connector card, and left connector cable. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment. 3 · Sensor Cable · Ink Cartridge Sensor Remove the ink cartridge assembly. Check the continuity on the sensor cable. Match pin numbers at both ends of the cable.

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Logic Board

If the continuity is correct, replace the ink cartridge sensor. If the continuity ius incorrect, replace the sensor cable.

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Ink Flow Service Check
Symptom Explanation You have no ink flow, with no error code displayed. Conditions That Could Cause This Symptom · · · · · · · Ink Cartridge Supply Lines Carriage supply and waste lines Purge waste lines Ink cartridge waste lines Purge Unit Ink supply assembly Printhead

Important: A long cleaning uses a significant amount of ink. To minimize ink flow while you troubleshoot ink flow problems, it is helpful to be familiar with normal ink flow. If needed, study the "Ink Supply Diagram" on page 5-6, and the text on the following page. Start with the flow of ink from the ink cartridge. It is also helpful to be familiar with this service check. Read the entire service check to become familiar with the parts you need to check. Check as many parts as possible during the long cleaning rather than performing a long cleaning for each step.

FRU 1 · Carriage Ink Supply Assembly · Ink Cartridge Supply Lines Purge Unit

Action Perform a Long Cleaning. Be sure the carriage supply lines are full of ink at the cartridge assembly connection (smaller lines). If they are not, check the carriage ink supply line for blockage. Follow the lines to see whether they are filled or empty. Be sure the purge assembly motor is operating normally. If it is not, replace it. Be sure the carriage waste lines at the purge assembly connector are full of ink. If they are not, replace the carriage ink supply assembly (Asm. 10-1). Be sure ink flows through the large purge waste lines when the purge motor runs. If it does not, replace the purge unit.

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FRU 3 Carriage Ink Supply Assembly · Ink Cartridge Assembly Waste Lines · Ink Cartridge Printhead Action Be sure the carriage ink supply assembly waste lines fill when the purge motor completes its cycle. The purge unit discharges ink back to the ink cartridge through the waste line in the ink return unit. Be sure the waste lines are not blocked. Also, be sure the ink cartridge is good. Be sure ink is flowing through the ink supply assembly (asm. 10-1). Perform a Long Cleaning. Replace the printhead for the color that fails to flow.

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Ink Sensor Service Check
Symptom Explanation You have problems with ink sensing. The sensor may indicate no ink when a good cartridge is installed, or may fail to indicate when the cartridge is empty. Conditions That Could Cause This Symptom · · · · Ink cartridge Ink sensor Ink sensor cable Logic board

If you are instructed to remove the ink cartridge assembly, it is recommended that you remove all ink cartridges, carefully drain the ink from the lines into a plastic-lined waste can or absorbent material, then replace the cartridges and wrap a packet of cleaning cloths or paper towels over the connector end, secured with a rubber band. Keep the assembly on a level plane while servicing with the black cartridge end slightly elevated. Cover any open ink lines with absorbent cloth, secured with a rubber band, when possible.
FRU 1 Ink Cartridge Action The ink sensor determines whether an individual ink cartridge is empty and causes an error code. Remove the ink cartridge. Hold a cloth over the sensor end, and gently shake the cartridge. If you do not feel or hear ink movement in the cartridge, replace it.

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FRU 2 Ink Sensor Action Check the ink sensor by checking for 5 V dc between the pins designated for each cartridge sensor on the CNINK connector as you push the sensor down and up.

Cyan = pins 1 - 2 Magenta = pins 3 - 4 Yellow = pins 5 - 6 Black = pins 7 - 8

To push down the ink sensor: insert a thin screwdriver just above the ink cartridge assembly and below the paper lift plate, then push the ink sensor plunger down. The voltage should be low when the sensor is on (the center of the sensor is up), and high when the sensor is off (the center of the sensor is down). If the voltage is correct, replace the ink sensor.

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FRU 3 · Sensor Cable · Logic Board

Action Check the sensor cable continuity, matching pins on CNINK at the left connector card with wires to the ink sensor units. If the continuity is not correct, replace the sensor cable.

If the continuity is correct, replace the logic board. If you replace the logic board, go to the "Service Adjustment Mode" on page 4-4 and perform the print position adjustment, and the direction offset adjustment.

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Logic Board And Related Cables Service Check
Symptom Explanation You have problems with the logic board or cables. Conditions That Could Cause This Symptom · System cables · Carriage board · Logic board

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FRU 1 · Brown Carriage Cable 2 · White Ribbon Cable 2 · Carriage Board · Logic Board Action Follow these steps if 5 beeps are sounded, checking the error after each action: 1. Check for correct connection of the brown carriage cable 2 to the carriage board and the right connector card. 2. Check for correct connection of the white ribbon cable 2 to the right connector card and the logic board. 3. Check continuity of the white ribbon cable 2 (23 pin) and brown