Lexmark C746n, C746dn, C746dtn, C748e, C748de, C748dte Service Manual
Lexmark™ C746n, C746dn, C746dtn,
• Tabl e of conte n t s
• Start diagnostics
Revised: April 19, 2012
C748e, C748de, C748dte
5026-3xx, 5xx
• Safet y 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.
Edition: April 19, 2012
The following paragraph does not apply to any country where such provis ions are inconsistent wit h 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. Improvements or changes in the products or the
programs described may be made at any time.
Comments may be addressed to Lexmark International, Inc., Department D22A/032-2, 740 West New Circle Road,
Lexington, Kentucky 40550, U.S.A or e-mail at ServiceInfoAndTraining@Lexmark.com. Lexmark may use or distribute any
of the information you supply in any way it believes appropriate without incurring any obligation to you.
References in this publication to products, programs, or services do not imply that the manufacturer intends to make these
available in all countries in which it operates. Any reference to a product, program, or service is not intended to state or
imply that only that product, program, or service may be used. Any functionally equivalent product, program, or service that
does not infringe any existing intellectual property right may be used instead. Evaluation and verification of operation in
conjunction with other products, programs, or services, except those expressly designated by the manufacturer, are the
user’s responsibility.
Lexmark, Lexmark with diamond design, and MarkNet are trademarks of Lexmark International, Inc., registered in the
United States and/or other countries.
PrintCryption is a trademark of Lexmark International, Inc.
PCL® is a registered trademark of the Hewlett-Packard Company.
All other trademarks are the property of their respective owners.
The Software Program and any related documentation are "Commercial Items," as that term is defined in 48 C.F.R. 2.101,
"Computer Software" and "Commercial Computer Software Documentation," as such terms are used in 48 C.F.R. 12.212
or 48 C.F.R. 227.7202, as applicable. Consistent with 48 C.F.R. 12.212 or 48 C.F.R. 227.7202-1 through 227.7207-4, as
applicable, the Commercial Computer Software and Commercial Software Documentation are licensed to the U.S.
Government end users (a) only as Commerical Items and (b) with only those rights as are granted to all other end users
pursuant to the terms and conditions herein.
The following laser notice labels may be affixed to this printer.
Laser no tice
This product 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.
Class I laser products are not considered to be hazardous. The printer contains internally a Class IIIb (3b)
AlGaAs laser producing visible radiation in the wavelength of 770-800 nanometers enclosed in a nonserviceable printhead assembly. The laser system and printer are designed so there is never any human access
to laser radiation exceeding Class I levels during normal operation, user maintenance, or prescribed service
condition.
Laser-Hinweis
Dieses Produkt ist in den USA zertifiziert und entspricht den Anforderungen der Vorschriften DHHS21CFR
UnterkapitelJ für Laserprodukte der KlasseI(1), andernorts ist er als Laserprodukt der KlasseI zertifiziert, das
den Anforderungen von IEC60825-1 entspricht.
Laserprodukte der KlasseI werden nicht als gefährlich betrachtet. Der Drucker enthält im Inneren einen Laser
der KlasseIIIb (3b) AlGaAs, der sichtbare Strahlung im Wellenlängenbereich von 770bis 800Nanometern
abgibt. Dieser befindet sich in einer Druckkopfeinheit, die nicht gewartet werden kann. Das Lasersystem und
der Drucker sind so konstruiert, dass unter normalen Betriebsbedingungen bei der Wartung durch den Benutzer
oder bei den vorgeschriebenen Wartungsbedingungen Menschen keiner Laserstrahlung ausgesetzt sind, die
die Werte für KlasseI überschreitet.
Avis relatif à l’utilisation de laser
Ce produit est certifié conforme aux exigences de la réglementation des Etats-Unis relative aux produits laser
(DHHS21 CFR Sous-chapitreJ pour ClasseI (1)). Pour les autres pays, il est certifié conforme aux exigences
des normes CEI60825-1 relatives aux produits laser de classeI.
Les produits laser de ClasseI ne sont pas considérés comme dangereux. L'imprimante contient un laser de
ClasseIIIb (3b) AlGaAs qui produit des radiations visibles opérant sur une longueur d'onde de l'ordre de 770 à
800nanomètres au sein d'un boîtier non démontable de la tête d'impression. Le système laser et l'imprimante
ont été conçus de manière à ce que personne ne soit jamais exposé à des radiations laser dépassant le niveau
de classeI dans le cadre d'un fonctionnement normal, de l'entretien par l'utilisateur ou de la maintenance.
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Avvertenze sui prodotti laser
Questo prodotto è certificato negli Stati Uniti come prodotto conforme ai requisiti DHHS 21 CFR Sottocapitolo J
per i prodotti laser di Classe I (1), mentre in altri paesi è certificato come prodotto laser di Classe I conforme ai
requisiti IEC 60825-1.
I prodotti laser di Classe I non sono considerati pericolosi. La stampante contiene un laser Classe IIIb (3b)
AlGaInP che emette una radiazione visibile a una lunghezza d'onda di 770-800 nanometri all'interno dell'unità
testina di stampa non sottoponibile a manutenzione. Il sistema laser e la stampante sono stati progettati in modo
da impedire l'esposizione a radiazioni laser superiori al livello previsto dalla Classe I durante le normali
operazioni di stampa, manutenzione o assistenza.
Avisos sobre el láser
Este producto se ha certificado en EE.UU. cumpliendo con los requisitos de DHHS 21 CFR subcapítulo J para
los productos láser de ClaseI (1) y en otros países está certificada como un producto láser de ClaseI de
acuerdo con los requisitos de IEC 60825-1.
Los productos láser de ClaseI no se consideran peligrosos. Este producto contiene un láser interno de Clase
IIIb (3b) AlGaAs que produce una radiación visible en una longitud de onda de 770-800 nanómetros cerrado en
un conjunto de cabezal de impresión que no se puede reparar. El sistema láser y la impresora se han diseñado
para que el ser humano no acceda nunca a las radiaciones láser por encima del nivel de Clase I durante el
funcionamiento normal, mantenimiento del usuario o condición de servicio prescrita.
Declaração sobre Laser
Este produto foi certificado nos EUA por estar em conformidade com os requisitos do DHHS 21 CFR,
subcapítulo J, para produtos a laser de Classe I (1) e, nos demais países, foi certificado como um produto a
laser de Classe I em conformidade com os requisitos da IEC 60825-1.
Os produtos a laser de Classe I não são considerados prejudiciais. A impressora contém, internamente, um
laser de Classe IIIb (3b) AlGaAs que produz radiação visível no comprimento de onda de 770-800 nanômetros
incluso em um conjunto do cabeçote de impressão cuja manutenção não é facilitada. O sistema do laser e a
impressora foram projetados para que jamais haja acesso humano à radiação do laser acima dos níveis da
Classe I durante a operação normal ou a manutenção pelo usuário ou sob as condições de manutenção
prescritas.
Aviso sobr e o las er
Nos E.U.A., este produto está classificado como estando em conformidade com os requisitos DHHS 21 CFR,
Subcapítulo J, para produtos laser de Classe I (1) e, nas restantes regiões, está classificado como um produto
de Classe I, estando em conformidade com os requisitos IEC 60825-1.
Os produtos laser de Classe I não são considerados perigosos. A impressora possui, no seu interior, um laser
de Classe IIIb (3b) AlGaAs que produz radiação num comprimento de onda de 770-800 nanómetros. Este
encontra-se fechado no conjunto da cabeça de impressão, que não é passível de manutenção. O sistema de
laser e a impressora estão concebidos de forma a que nunca haja acesso humano à radiação laser que excede
os níveis correspondentes à Classe I durante o funcionamento normal, manutenção ou em condições de
assistência recomendada.
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Laserinformatie
Dit product is in de Verenigde Staten gecertificeerd als een product dat voldoet aan de vereisten van DHHS 21
CFR paragraaf J voor laserproducten van klasse I (1). Elders is het product gecertificeerd als een laserproduct
van klasse I dat voldoet aan de vereisten van IEC 60825-1.
Laserproducten van klasse I worden geacht geen gevaar op te leveren. De printer bevat intern een laser van
klasse IIIb (3b) AlGaAs die zichtbare straling produceert in een golflengtebereik van 770-800 nanometer in een
niet-bruikbare printkopeenheid. Het lasersysteem en de printer zijn zodanig ontworpen dat gebruikers nooit
blootstaan aan laserstraling die hoger is dan het toegestane niveau voor klasse I-apparaten, tijdens normaal
gebruik, onderhoudswerkzaamheden door de gebruiker of voorgeschreven servicewerkzaamheden.
Lasermeddelelse
Dette produkt er certificeret i USA i henhold til kravene i DHHS 21 CFRi underafsnit J for klasse l (1)laserprodukter og er andre steder certificeret som et klasse I laserprodukt i henhold til kravene i IEC 60825-1.
Klasse I-laserprodukter er ikke anset som farlige. Printeren indeholder internt en klasse IIIb (3b) AlGaAs-laser,
der producerer synlig stråling med en bølgelængde på 770-800 nanometer, indkapslet i en ikke-servicerbar
printhovedsamling. Lasersystemet og printeren er udviklet på en sådan måde, at der ikke er en direkte
laserstråling, der overskrider Klasse I-niveauet under normal brug, brugers vedligeholdelse eller de foreskrevne
servicebetingelser.
Laserilmoitus
Tämä tuote on sertifioitu Yhdysvalloissa DHHS 21 CFR Subchapter J -standardin mukaiseksi luokan I (1) lasertuotteeksi ja muualla IEC 60825-1 -standardin mukaiseksi luokan I lasertuotteeksi.
Luokan I lasertuotteita ei pidetä haitallisina. Laitteen tulostuspääkokoonpanossa (ei huollettavissa) on
sisäänrakennettu luokan IIIb (3b) AlGaAs -laser, joka tuottaa silminnähtävää säteilyä 770-800 nanometrin
aallonpituudella. Laserjärjestelmä ja tulostin ovat rakenteeltaan sellaisia, että käyttäjä ei joudu alttiiksi luokkaa 1
suuremmalle säteilylle normaalin käytön, ylläpidon tai huollon aikana.
Huomautu s las er laitteesta
Tämä tuote on sertifioitu Yhdysvalloissa DHHS 21 CFR Subchapter J -standardin mukaiseksi luokan I (1) lasertuotteeksi ja muualla IEC 60825-1 -standardin mukaiseksi luokan I lasertuotteeksi.
Luokan I lasertuotteita ei pidetä haitallisina. Laitteen tulostuspääkokoonpanossa (ei huollettavissa) on
sisäänrakennettu luokan IIIb (3b) AlGaAs -laser, joka tuottaa silminnähtävää säteilyä 770-800 nanometrin
aallonpituudella. Laserjärjestelmä ja tulostin ovat rakenteeltaan sellaisia, että käyttäjä ei joudu alttiiksi luokkaa 1
suuremmalle säteilylle normaalin käytön, ylläpidon tai huollon aikana.
Notices and safety information xi
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Laser-notis
Denna produkt är certifierad i USA i enlighet med kraven i DHHS 21 CFR underkapitel J för klass I (1)laserprodukter, och på andra platser certifierad som en klass I-laserprodukt i enlighet med kraven i IEC 60825-1.
Klass I-laserprodukter betraktas inte som skadliga. Skrivaren innehåller en klass IIIb (3b) AlGaAs-laser som
producerar synlig strålning inom våglängden 770-800 nm, innesluten i en icke-servicebar skrivhuvudenhet.
Lasersystemet och skrivaren är utformade så att människor aldrig utsätts för laserstrålning som överskrider
klass I-nivåerna under normala förhållanden vid användning, underhåll eller service.
Laser-melding
Dette produktet er sertifisert i USA for samsvar med kravene i DHHS 21 CFR, underkapittel J for laserprodukter
av klasse I (1) og er andre steder sertifisert som et laserprodukt av klasse I som samsvarer med kravene i IEC
60825-1.
Laserprodukter av klasse I anses ikke som helseskadelige. Skriveren inneholder en intern AlGaAs-laser av
klasse IIIb (3b) som produserer synlig stråling i bølgelender på 770-800 nanometer i en ikke-reparerbar
skrivehodeenhet. Lasersystemet og skriveren er utformet slik at mennesker ikke utsettes for laserstråling utover
nivåene i klasse I under normal drift, vedlikehold eller foreskrevet service.
Avís sobre el Làser
Este producto está certificado en Estados Unidos para el cumplimiento de los requisitos estipulados en DHHS
21 CFR Subcapítulo J para productos láser de Clase I (1), y cuenta con certificación para otros países como
producto láser de Clase I de conformidad con los requisitos de IEC 60825-1.
Los productos láser de Clase I no se consideran peligrosos. La impresora contiene en su interior radiación láser
visible AlGaAs Clase IIIb (3b) en la longitud de onda de 770 - 800 nanómetros dentro de un mecanismo de
cabezal de impresión que no requiere servicio técnico. La impresora y el sistema láser están diseñados de
forma tal que no exista nunca acceso humano a radiación láser que supere los niveles de Clase I durante el
funcionamiento normal, las tareas de mantenimiento por parte del usuario o las condiciones de servicio técnico
estipuladas.
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Notices and safety information xiii
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CAUTION
This product contains a lithium battery. THERE IS A RISK OF EXPLOSION IF THE BATTERY
IS REPLACED BY AN INCORRECT TYPE. Discard used batteries according to the battery
manufacturer’s instructions and local regulations.
Lithium warn ing
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.
•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.
•CAUTION: When you see this symbol, there is a danger from hazardous voltage in the area of the
product where you are working. Unplug the product before you begin, or use caution if the product
must receive power in order to perform the task.
Consignes de sécurité
•La sécurité de ce produit repose sur des tests et des
agréations portant sur sa conception d'origine et sur des composants particuliers. Le fabricant n'assume
aucune responsabilité concernant la sécurité en cas d'utilisation de pièces de rechange non agréées.
•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.
•ATTENTION : Ce symbole indique la présence d'une tension dangereuse dans la partie du
produit sur laquelle vous travaillez. Débranchez le produit avant de commencer ou faites preuve
de vigilance si l'exécution de la tâche exige que le produit reste sous tension.
Norme di sicurezza
•La sicurezza del prodotto si basa sui test e sull'approvazione del progetto originale e dei componenti
specifici. Il produttore non è responsabile per la sicurezza in caso di sostituzione non autorizzata delle
parti.
•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.
•ATTENZIONE: Questo simbolo indica la presenza di tensione pericolosa nell'area del prodotto.
Scollegare il prodotto prima di iniziare o usare cautela se il prodotto deve essere alimentato per
eseguire l'intervento.
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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.
•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.
•ACHTUNG: Dieses Symbol weist auf eine gefährliche elektrische Spannung hin, die in diesem
Bereich des Produkts auftreten kann. Ziehen Sie vor den Arbeiten am Gerät den Netzstecker des
Geräts, bzw. arbeiten Sie mit großer Vorsicht, wenn das Produkt für die Ausführung der Arbeiten
an den Strom angeschlossen sein muß.
Pautas de Seguridad
•La seguridad de este producto se basa en pruebas y aprobaciones del diseño original y componentes
específicos. El fabricante no es responsable de la seguridad en caso de uso de piezas de repuesto no
autorizadas.
•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.
•PRECAUCIÓN: este símbolo indica que el voltaje de la parte del equipo con la que está
trabajando es peligroso. Antes de empezar, desenchufe el equipo o tenga cuidado si, para
trabajar con él, debe conectarlo.
Inform a çõ es de Segurança
•A segurança deste produto baseia-se em testes e aprovações do modelo original e de componentes
específicos. O fabricante não é responsável pela segunrança, no caso de uso de peças de substituição
não autorizadas.
•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.
•CUIDADO: Quando vir este símbolo, existe a possível presença de uma potencial tensão
perigosa na zona do produto em que está a trabalhar. Antes de começar, desligue o produto da
tomada eléctrica ou seja cuidadoso caso o produto tenha de estar ligado à corrente eléctrica para
realizar a tarefa necessária.
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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.
•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.
•PRECAUCIÓ: aquest símbol indica que el voltatge de la part de l'equip amb la qual esteu
treballant és perillós. Abans de començar, desendolleu l'equip o extremeu les precaucions si, per
treballar amb l'equip, l'heu de connectar.
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CAUTION
A caution identifies something that might cause a servicer harm.
CAUTION
This type of caution indicates there is a danger from hazardous voltage in the area of the
product where you are working. Unplug the product before you begin, or use caution if the
product must receive power in order to perform the task.
CAUTION
This type of caution indicates a hot surface.
CAUTION
This type of caution indicates a tipping hazard.
Preface
This manual contains maintenance procedures for service personnel. It is divided into the following chapters:
1. General infor m a ti o n 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.
2. Diagnostic information contains an error indicator table, symptom tables, and service checks used to
isolate failing field replaceable units (FRUs).
3. Diagnostic aids contains tests and checks used to locate or repeat symptoms of printer problems.
4. Repair infor ma t io n provides instructions for making printer adjustments and removing and installing
FRUs.
5. Connector locations uses illustrations to identify the connector locations and test points on the printer.
6. Preventive maintenance contains the lubrication specifications and recommendations to prevent
problems.
7. Parts catalog contains illustrations and part numbers for individual FRUs.
Appendix A contains service tips and information.
Appendix B contains representative print samples.
Conventions
Note: A note provides additional information.
Warning: A warning identifies something that might damage the product hardware or software.
There are several types of caution statements:
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Navigation buttons
This manual contains navigation buttons in the right margin of each page, making it easier and quicker to navigate.
ButtonDescription
Previous
Click to move the document view backward by one page.
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Click to move the document view forward by one page.
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1
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1. General in formation
The Lexmark™ C746x and C748x family of color laser printers.
Models
Options
Printer name
Lexmark C746n5026-310Network-ready
Lexmark C746dn5026-330Network-ready with duplex
Lexmark C746dtn5026-330Network-ready with duplex and 550 sheet tray
Lexmark C748e5026-510Network-ready with etask touch screen
Lexmark C748de5026-530Network-ready with etask touch screen and duplex
Lexmark C748dte5026-530Network-ready with etask touch screen, duplex, and
Machine typ e
and model
Description
550 sheet tray
General information 1-1
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NumberDescription
1Standard output bin
2Paper support
3Printer operator panel
4Standard 550-sheet stray (Tray 1)
5Multipurpose feeder
6Optional 550-sheet specialty media drawer
7Optional 550-sheet tray
8Optional 2,000-sheet high.capacity feeder
Note: Some configurations may require a caster base for stability.
Media options
The C746x and C748x printers support the 550-sheet drawer, special media drawers, and 2000-sheet highcapacity input tray. The C746x and C748x printers support up to four input options. The options can include any
combination of 550 sheet drawers and 550 sheet Specialty Media Drawers, with a maximum of one 2000 sheet
drawer (always at the lowest position.) A caster base is required with some configurations. Including the base
machine capacity of 650 sheets, the C746x and C748x supports up to 4300 sheets.
The Lexmark C74x options are compatible with the Lexmark C73x SFP, X73x MFP, and X74x MFP, but not with
any other Lexmark printers. No other options are supported by the C74x.
The media options include:
•550-Sheet Drawer—This optional input source installs beneath the printer, and it holds approximately 550
sheets of (20 lb.) paper.
•High Capacity Input Tray—This optional input source installs beneath the printer, and it holds
approximately 2000 sheets of (20 lb.) paper.
•Specialty Media Drawer—This optional input source installs beneath the printer, and it holds
approximately 550 sheets of (20 lb.) paper, or 85 standard envelopes.
Memory options
•Additional memory card—The memory options for the C746x and C748x printers are 200 pin DDR2,
SODIMM, and they are available at 256MB, 512MB, and 1GB sizes.
•Flash memory card—Flash Memory cards are available in 256MB.
•Hard disk—If larger storage is required, an optional hard disk is available.
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Printer specifications
Dimensions
The following table contains the dimensions and weight for each of the respective printer models. This does not
include packaging.
HeightWidthDepthWeight
Basic printer (C746n/dn)454.7 mm
Basic printer (C748e/de)454.7 mm
C746dtn printer, with 550-sheet
optional drawer
C748dte printer, with 550-sheet
optional drawer
550-sheet drawer169.0 mm
550-sheet special media drawer169.0 mm
2000-sheet high capacity feeder387.0 mm
Spacer169.0 mm
Caster Base127.0 mm
(17.9 in)
(17.9 in)
581.7 mm
(22.9 in)
581.7mm
(22.9 in)
(6.6 in)
(6.6 in)
(15.2 in)
(6.6 in)
(5.0 in)
435.0 mm
(17.1 in)
435.0 mm
(17.1 in)
435.0 mm
(17.1 in)
435.0 mm
(17.1 in)
435.0 mm
(17.1 in)
435.0 mm
(17.1 in)
435.0 mm
(17.1 in)
435 mm
(17.1 in)
778 mm
(30.6 in)
400.0 mm
(15.7 in)
400.0 mm
(15.7 in)
545.0 mm
(21.5 in)
545.0 mm
(21.5 in)
545.0 mm
(21.5 in)
545.0 mm
(21.5 in)
545.0 mm
(21.5 in)
545 mm
(21.5 in)
812.0 mm
(32.0 in)
25.2 kg
(55.6 lbs)
25.6 kg
(56.4 lbs)
29.7 kg
(65.5 lbs)
30.1kg
(66.4 lbs)
4.5 kg
(10.0 lbs)
4.5 kg
(10.0 lbs)
26.1 kg
(57.5 lbs)
3.2 kg
(7.0 lbs)
43.1 kg
(95.0 lbs)
General information 1-3
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1
2
3
4
5
Clearances
Memory
Number DescriptionClearance
1Right side101.6 mm (4 in.)
2Front609.6 mm (24 in.)
3Left side152.4 mm (6 in.)
4Rear152.4 mm (6 in.)
5Top304.8 mm (12 in.)
C746C748
Standard memory—The standard RAM is soldered onto the system board.
Memory size
Optional memory—Optional DIMM (Dual Inline Memory Module) is a card that can be plugged into an
available memory slot on the system board. Flash memory is a card that can also be plugged into an
available slot.
Air temperature—Operating15.6° to 32.2° C (60° to 90° F)
Air temperature—Power off10° to 40° C (50° to 104° F)
Air Relative HumidityRelative humidity 8% to 80%
Wet Bulb Temperature—Operating22.8° C (73.0° F) Maximum
Web Bulb Temperature—Power off26.7° C (80.1° F) Maximum
Altitude0–3,048 meters (10,000 ft.)
Ambient Operating Environment* 15.6° to 32.2° C (60° to 90° F) and 8% to 80% RH
Shipping and storage
Cartridges (packaged)-40° C to 40° C (104° Fahrenheit)
Printer with Cartridges (packaged)-40° C to 40° C (104° Fahrenheit)
Printer without Cartridges-40° C to 40° C (104° Fahrenheit)
Air Relative HumidityRelative humidity 8% to 80%
Altitude0–10,300 meters (34,000 feet)
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EnvironmentSpecifications
Web Bulb Temperature—Power Off26.7° C (80.1° F) Maximum
* In some cases performance specifications, such as paper OCF and EP cartridge usage, are specified to
be measured at an ambient condition.
Electrical and power specifications
The following table specifies nominal average power requirements for the basic printer configurations. All power
levels are shown in Watts (W). Maximum current is given in Amperes (A).
Printing statesC746n/dn/dtnLexmark C748e/de/dte
Off 0W 0W
Sleep mode 6.8W 7.3W
Hibernate mode0.55W0.55W
Ready Mode48W 48W
Simplex Printing535W535W
Duplex Printing420W420W
Typical Electricity Consumption
Test
Typical Electricity Consumption
Test (Eco-Mode)
Average current while printing
(110 Volts)
Average current while printing
(120 Volts)
Average current while printing
(230 Volts)
Low-voltage models
3.561 kwh / wk3.687 kwh / wk
2.375 kwh / wk2.491 kwh / wk
8.3 A8.3 A
7.5 A7.5 A
3.8 A3.8 A
•110 to 127 V at 50 to 60 Hertz (Hz) nominal
•99 to 139.7 V, extreme
•100 V at 50 to 60 Hertz (Hz) nominal
•90 to 121 V, extreme
High-voltage models
•220 to 240 V at 50 to 60 Hz (not available in all countries)
•198 to 259 V, extreme
Notes:
•Using a power converter or inverter with the Lexmark C740 Series printers is not recommended.
•The C740 series duplex models (C746dn, C746dtn, C748de, C748dte) are Energy Star Qualified.
•All models ship with Sleep Mode = On.
•The default time out to Sleep mode is 30 minutes.
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Acoustic specifications
All acoustic measurements are made in accordance with ISO 7779:1999—Accoustics : Measure ment of air borne
noise emitted by information technology and telecommunications and reported in conformance with ISO 9296:
1988-04-15—Accoustics Declared noise emission values of computer and business equipment.
Operating mode
1 meter average sound pressur e
(dBA)
Declared sound pow er l evel
C746
Idle32 dB4.8 Bels
Simplex printing (mono)53 dB6.8 Bels
Simplex printing (color)54 dB6.8 Bels
Duplex printing (mono)54 dB6.9 Bels
Duplex printing (color)55 dB6.9 Bels
Quiet mode printing (mono)48 dB6.3 Bels
Quiet mode printing (color)48 dB6.3 Bels
C748
Idle32 dB4.8 Bels
Simplex printing (mono)54 dB6.8 Bels
Simplex printing (color)55 dB6.9 Bels
Duplex printing (mono)53 dB6.9 Bels
Duplex printing (color)55 dB6.9 Bels
(Bels)
Quiet mode printing (mono)47 dB6.3 Bels
Quiet mode printing (color)48 dB6.3 Bels
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Media specifications
Paper designed for use with xerographic copiers should provide satisfactory print quality and feed reliability.
Other types of media may be suitable. It is recommended that users test any particular brand for suitability to
their applications. Refer to the printer User's Guide for additional media specifications.
Paper
Follow the media guidelines below for successful printing:
•Rough, highly textured, limp, or pre-curled papers will result in lower print quality and more frequent paper
feed failures.
•Colored papers must be able to withstand 190° C (374° F) fusing temperature.
•Preprinted forms and letterheads must be able to withstand 190° C (374° F) fusing temperature and should
be selected using guidelines found in the printer User’s Guide. The chemical process used in preprinting
may render some papers unsuitable for use.
•Unsuitable papers include:
– Multi-part forms and documents
– Chemically treated papers; coated
– Synthetic and thermal papers
– A5 paper less than 80 g/m
– Recycled paper less than 75 g/m
– Preprinted papers requiring a high degree of registration.
– Recycled paper less than 80 g/m
2
(21 lb)
2
(20 lb)
2
(21 lb) may cause unacceptable results.
Envelopes
All envelopes should be new, unused, and without package damage.
•
•Envelopes with excessive curl or twist exceeding 6 mm, those stuck together, those with bent corners or
nicked edges, or those that interlock should not be used.
•Minimum weight: 60 g/m2 (16 lb.)
•The following envelopes should not be used:
•Envelopes with windows, holes, perforations, cutouts, or deep embossing
•Envelopes with metal clasps, string ties, or metal folding bars
•Envelopes with exposed flap adhesive when the flap is in the closed position.
•For best results, printing on new 90 g/m2 (24 lb.) sulfite or 25% cotton bond envelopes is recommended.
•Under high humidity conditions (over 60%), envelopes may seal during printing.
Transparencies
•
Use letter or A4-size transparencies for color laser printers only.
•See Ordering Information for the recommended transparencies for the Lexmark C746x/C748x laser
printers.
•Do not use inkjet transparencies.
Labels
Labels should be selected using guidelines found in the User's Guide or the Card Stock and Label Guide, and
tested for acceptability.
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Using recycled paper and other office papers
Recycled office paper produced specifically for use in laser (electrophotographic) printers may be used in your
printer. However, no blanket statement can be made that all recycled paper will feed well.
Generally, the following property guidelines apply to recycled paper.
•Low moisture content (4–5%)
•Suitable smoothness (100–200 Sheffield units, or 140–350 Bendtsen units, European)
Note: Some much smoother papers (such as premium 24 lb laser papers, 50–90 Sheffield units) and
much rougher papers (such as premium cotton papers, 200–300 Sheffield units) have been engineered to
work very well in laser printers, despite surface texture. Before using these types of paper, consult your
paper supplier.
•Suitable sheet-to-sheet coefficient of friction (0.4–0.6)
•Sufficient bending resistance in the direction of feed
2
Recycled paper, paper of lower weight (<60 g/m
paper that is cut grain-short for portrait (or short-edge) fed printers may have lower bending resistance than is
required for reliable paper feeding. Before using these types of paper for laser (electrophotographic) printing,
consult your paper supplier. Remember that these are general guidelines only and that paper meeting these
guidelines may still cause paper feeding problems in any laser printer (for example, if the paper curls
excessively under normal printing conditions).
The following table describes the media options that each model supports, and the estimated capacities in stand
and maximum configurations. Capacity may vary and is subject to media specifications and printer operating
environment. The capacities are based on plain paper at 75g/m
Standard input sources
Primary tray capacity (sheets)550
Multipurpose feeder capacity (sheets)100
2
.
Number of standard sources (primary tray
2
and multipurpose feeder)
Total standard capacity (sheets)650
Optional input sources
550-Sheet Drawer (sheets)550
High-capacity input tray (HCIT) (sheets)2,000
Specialty Media Drawer
Maximum number of 550-sheet drawers
a
(sheets)550 (or 85 envelopes)
4
(including Speciality Media Drawer)
Maximum number of high-capacity input
1
tray (must be installed on the bottom)
Maximum number of standard and
6
optional input sources
Maximum capacity for standard and
4,300
options input sources (sheets)
b
Standard output bin capacity (sheets)
300
Maximum output bin capacity (sheets)300
Duplex capabilityStandard for
C746dn,C746dtn,C748de,and
C748dte models
a
Each 550-sheet Specialty Media Drawer replaces one 550-sheet option.
b
The output bin capacity may be reduced by 50 sheets when the duplex feature is in
use.
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