The following paragraph does not apply to any country where such provisions are inconsistent with local law:
LEXMARK INTERNATIONAL, INC. PROVIDES THIS PUBLICATION “AS IS” WITHOUT WARRANTY OF ANY KIND,
EITHER EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow disclaimer of express or
implied warranties 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. You can purchase
additional copies of publications related to this product by calling 1-800-553-9727. In other countries, contact your point of
purchase.
Lexmark, Lexmark with diamond design, and MarkNet are trademarks of Lexmark International, Inc., registered in the
United States and/or other countries.
ImageQuick, Optra Forms, and PrintCryption are trademarks of Lexmark International, Inc.
LEXFAX is a service mark of Lexmark International, Inc.
PostScript® is a registered trademark of Adobe Systems Incorporated.
PCL® is a registered trademark of the Hewlett-Packard Company.
Other trademarks are the property of their respective owners.
2004 Copyright Lexmark International, Inc.
All rights reserved.
UNITED STATES GOVERNMENT RIGHTS
This software and any accompanying documentation provided under this agreement are commercial computer software and
documentation developed exclusively at private expense.
250 Paper jam
271 Paper jam - Check Bin 1
272 Paper jam - Check Bin x
274 Paper jam - Check Bin 4
280 Paper jam
900 RIP Software Error
925 Error code
926 Error code
927 Error code
940 Error code
941 Error code
942 Error code
943 Error code
990 Service error
5-Bin mailbox option service check
500-Sheet drawer option service check
AC and DC power service check
Autocompensator service check
Black only retract (BOR) service check
Close door/HVPS/printhead interlock switch service check
Duplex option service check
Finisher service check
Fuser service check
High-capacity input tray (HCIT) 2000-sheet option service check
Operator panel LCD/status LED/buttons service check
Output Expander option service check
Print quality service checks
TYPE SENSING
SENSED TRANS
SENSED PAPER
CALIBRATE TRAYS
Panel Menus
PPDS Emulation
Download Emuls
Demo Mode
Factory Defaults
Energy Conserve
ITU Alignment
Auto Color Adjust
Exit Config Menu
Fuser top duct removal
Fuser web oiler motor assembly removal
ITU assembly removal
ITU drive assembly removal
ITU drive motor removal
Low voltage power supply (LVPS) removal
Multipurpose feeder (MPF) removal
Nip relief handle removal
Operator panel removal
Outer EMC shield removal
Paper size sensing assembly removal
Pick rolls
Printhead removal and adjustment
Printhead thermistor card removal
PSD sensor assembly removal
Rear bellcrank removal (cyan, magenta, yellow)
Rear bellcrank removal (black)
Redrive assembly removal
Registration motor removal
RIP board removal
RIP fan removal
RIP board shield assembly removal
S2/NMS/transparency sensor assembly removal
Second transfer roll removal
Transfer HVPS board removal
Transfer plate assembly
Vacuum transport belt (VTB) removal
Vacuum transport belt (VTB) fan removal
Waste container door removal
Waste container latch removal
Web oiler fuser kit installation
RIP board
Transfer high voltage power supply (HVPS)
Developer high voltage power supply (HVPS) board
Low voltage power supply (LVPS)
Low voltage power supply (LVPS)
The printer is certified in the U.S. to conform to the requirements of DHHS 21 CFR Subchapter J for Class I (1)
laser products, and elsewhere is certified as a Class I laser product conforming to the requirements of IEC
60825-1.
Class I laser products are not considered to be hazardous. The printer contains internally a Class IIIb (3b) laser
that is nominally a 5 milliwatt gallium arsenide laser operating in the wavelength region of 770-795 nanometers.
The laser system and printer are designed so there is never any human access to laser radiation above a Class
I level during normal operation, user maintenance, or prescribed service condition.
Laser
Der Drucker erfüllt gemäß amtlicher Bestätigung der USA die Anforderungen der Bestimmung DHHS
(Department of Health and Human Services) 21 CFR Teil J für Laserprodukte der Klasse I (1). In anderen
Ländern gilt der Drucker als Laserprodukt der Klasse I, der die Anforderungen der IEC (International
Electrotechnical Commission) 60825-1 gemäß amtlicher Bestätigung erfüllt.
Laserprodukte der Klasse I gelten als unschädlich. Im Inneren des Druckers befindet sich ein Laser der Klasse
IIIb (3b), bei dem es sich um einen Galliumarsenlaser mit 5 Milliwatt handelt, der Wellen der Länge 770-795
Nanometer ausstrahlt. Das Lasersystem und der Drucker sind so konzipiert, daß im Normalbetrieb, bei der
Wartung durch den Benutzer oder bei ordnungsgemäßer Wartung durch den Kundendienst Laserbestrahlung,
die die Klasse I übersteigen würde, Menschen keinesfalls erreicht.
Avis relatif à l’utilisation de laser
Pour les Etats-Unis : cette imprimante est certifiée conforme aux provisions DHHS 21 CFR alinéa J concernant
les produits laser de Classe I (1). Pour les autres pays : cette imprimante répond aux normes IEC 60825-1
relatives aux produits laser de Classe I.
Les produits laser de Classe I sont considérés comme des produits non dangereux. Cette imprimante est
équipée d’un laser de Classe IIIb (3b) (arséniure de gallium d’une puissance nominale de 5 milliwatts) émettant
sur des longueurs d’onde comprises entre 770 et 795 nanomètres. L’imprimante et son système laser sont
conçus pour impossible, dans des conditions normales d’utilisation, d’entretien par l’utilisateur ou de révision,
l’exposition à des rayonnements laser supérieurs à des rayonnements de Classe I .
Avvertenze sui prodotti laser
Questa stampante è certificata negli Stati Uniti per essere conforme ai requisiti del DHHS 21 CFR Sottocapitolo
J per i prodotti laser di classe 1 ed è certificata negli altri Paesi come prodotto laser di classe 1 conforme ai
requisiti della norma CEI 60825-1.
I prodotti laser di classe non sono considerati pericolosi. La stampante contiene al suo interno un laser di classe
IIIb (3b) all’arseniuro di gallio della potenza di 5mW che opera sulla lunghezza d’onda compresa tra 770 e 795
nanometri. Il sistema laser e la stampante sono stati progettati in modo tale che le persone a contatto con la
stampante, durante il normale funzionamento, le operazioni di servizio o quelle di assistenza tecnica, non
ricevano radiazioni laser superiori al livello della classe 1.
Notices and safety information xi
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Avisos sobre el láser
Se certifica que, en los EE.UU., esta impresora cumple los requisitos para los productos láser de Clase I (1)
establecidos en el subcapítulo J de la norma CFR 21 del DHHS (Departamento de Sanidad y Servicios) y, en
los demás países, reúne todas las condiciones expuestas en la norma IEC 60825-1 para productos láser de
Clase I (1).
Los productos láser de Clase I no se consideran peligrosos. La impresora contiene en su interior un láser de
Clase IIIb (3b) de arseniuro de galio de funcionamiento nominal a 5 milivatios en una longitud de onda de 770 a
795 nanómetros. El sistema láser y la impresora están diseñados de forma que ninguna persona pueda verse
afectada por ningún tipo de radiación láser superior al nivel de la Clase I durante su uso normal, el
mantenimiento realizado por el usuario o cualquier otra situación de servicio técnico.
Declaração sobre Laser
A impressora está certificada nos E.U.A. em conformidade com os requisitos da regulamentação DHHS 21 CFR
Subcapítulo J para a Classe I (1) de produtos laser. Em outros locais, está certificada como um produto laser da
Classe I, em conformidade com os requisitos da norma IEC 60825-1.
Os produtos laser da Classe I não são considerados perigosos. Internamente, a impressora contém um produto
laser da Classe IIIb (3b), designado laser de arseneto de potássio, de 5 milliwatts ,operando numa faixa de
comprimento de onda entre 770 e 795 nanómetros. O sistema e a impressora laser foram concebidos de forma
a nunca existir qualquer possiblidade de acesso humano a radiação laser superior a um nível de Classe I
durante a operação normal, a manutenção feita pelo utilizador ou condições de assistência prescritas.
Laserinformatie
De printer voldoet aan de eisen die gesteld worden aan een laserprodukt van klasse I. Voor de Verenigde Staten
zijn deze eisen vastgelegd in DHHS 21 CFR Subchapter J, voor andere landen in IEC 60825-1.
Laserprodukten van klasse I worden niet als ongevaarlijk aangemerkt. De printer is voorzien van een laser van
klasse IIIb (3b), dat wil zeggen een gallium arsenide-laser van 5 milliwatt met een golflengte van 770-795
nanometer. Het lasergedeelte en de printer zijn zo ontworpen dat bij normaal gebruik, bij onderhoud of reparatie
conform de voorschriften, nooit blootstelling mogelijk is aan laserstraling boven een niveau zoals
voorgeschreven is voor klasse 1.
Lasermeddelelse
Printeren er godkendt som et Klasse I-laserprodukt, i overenstemmelse med kravene i IEC 60825-1.
Klasse I-laserprodukter betragtes ikke som farlige. Printeren indeholder internt en Klasse IIIB (3b)-laser, der
nominelt er en 5 milliwatt galliumarsenid laser, som arbejder på bølgelængdeområdet 770-795 nanometer.
Lasersystemet og printeren er udformet således, at mennesker aldrig udsættes for en laserstråling over Klasse
I-niveau ved normal drift, brugervedligeholdelse eller obligatoriske servicebetingelser.
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Huomautus laserlaitteesta
Tämä kirjoitin on Yhdysvalloissa luokan I (1) laserlaitteiden DHHS 21 CFR Subchapter J -määrityksen mukainen
ja muualla luokan I laserlaitteiden IEC 60825-1 -määrityksen mukainen.
Luokan I laserlaitteiden ei katsota olevan vaarallisia käyttäjälle. Kirjoittimessa on sisäinen luokan IIIb (3b) 5
milliwatin galliumarsenidilaser, joka toimii aaltoalueella 770 - 795 nanometriä. Laserjärjestelmä ja kirjoitin on
suunniteltu siten, että käyttäjä ei altistu luokan I määrityksiä voimakkaammalle säteilylle kirjoittimen normaalin
toiminnan, käyttäjän tekemien huoltotoimien tai muiden huoltotoimien yhteydessä.
VARO! Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle. Älä katso
säteeseen.
VARNING! Osynlig laserstrålning när denna del är öppnad och spärren är urkopplad. Betrakta ej strålen.
Laser-notis
Denna skrivare är i USA certifierad att motsvara kraven i DHHS 21 CFR, underparagraf J för laserprodukter av
Klass I (1). I andra länder uppfyller skrivaren kraven för laserprodukter av Klass I enligt kraven i IEC 60825-1.
Laserprodukter i Klass I anses ej hälsovådliga. Skrivaren har en inbyggd laser av Klass IIIb (3b) som består av
en laserenhet av gallium-arsenid på 5 milliwatt som arbetar i våglängdsområdet 770-795 nanometer.
Lasersystemet och skrivaren är utformade så att det aldrig finns risk för att någon person utsätts för
laserstrålning över Klass I-nivå vid normal användning, underhåll som utförs av användaren eller annan
föreskriven serviceåtgärd.
Laser-melding
Skriveren er godkjent i USA etter kravene i DHHS 21 CFR, underkapittel J, for klasse I (1) laserprodukter, og er
i andre land godkjent som et Klasse I-laserprodukt i samsvar med kravene i IEC 60825-1.
Klasse I-laserprodukter er ikke å betrakte som farlige. Skriveren inneholder internt en klasse IIIb (3b)-laser, som
består av en gallium-arsenlaserenhet som avgir stråling i bølgelengdeområdet 770-795 nanometer.
Lasersystemet og skriveren er utformet slik at personer aldri utsettes for laserstråling ut over klasse I-nivå under
vanlig bruk, vedlikehold som utføres av brukeren, eller foreskrevne serviceoperasjoner.
Avís sobre el Làser
Segons ha estat certificat als Estats Units, aquesta impressora compleix els requisits de DHHS 21 CFR, apartat
J, pels productes làser de classe I (1), i segons ha estat certificat en altres llocs, és un producte làser de classe
I que compleix els requisits d’IEC 60825-1.
Els productes làser de classe I no es consideren perillosos. Aquesta impressora conté un làser de classe IIIb
(3b) d’arseniür de gal.li, nominalment de 5 mil.liwats, i funciona a la regió de longitud d’ona de 770-795
nanòmetres. El sistema làser i la impressora han sigut concebuts de manera que mai hi hagi exposició a la
radiació làser per sobre d’un nivell de classe I durant una operació normal, durant les tasques de manteniment
d’usuari ni durant els serveis que satisfacin les condicions prescrites.
Laser notice xiii
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xivService Manual
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Laser notice xv
5060-00x
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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.
Safety information xvii
5060-00x
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.
Informações 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.
xviiiService Manual
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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.
Safety information xix
5060-00x
Preface
This manual contains maintenance procedures for service personnel. It is divided into the following chapters:
1. General information contains a general description of the printer and the maintenance approach used to
repair it. Special tools and test equipment are, as well as general environmental and safety instructions.
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 information 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.
Definitions
Note: A note provides additional information
Warning: A warning identifies something that might damage the product hardware or software.
CAUTION: A caution identifies something that might cause a servicer harm.
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.
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1. General information
The Lexmark™ C750 is a network color printer that uses electrophotographic technology to deliver high quality
images, presentation graphics, line art, and text. It prints up to 20 pages per minute (ppm) for both four-color and
monochrome print jobs.
The printer's flexible design allows it to support a variety of printing needs. For example, if you need the printer
to match the color process used in a particular application, you can select RGB or CMYK color corrections. You
can also adjust the printed colors to more closely represent the colors on your computer display.
A variety of connectivity options enable the printer to be used in all types of system environments. You can
attach one internal adapter to support network configurations requiring Ethernet, Token-Ring, LocalTalk, serial,
infrared, or additional parallel ports.
The printer has flexible paper handling. It supports a wide variety of paper sizes, and has a standard
multipurpose feeder that makes it easy to print on envelopes, transparencies, labels, card stock, and nonstandard size paper. You can add up to three optional drawers to the base printer, which can increase the printer
paper capacity to 2000 sheets.
The Lexmark C750 (5060-00x) laser printer is available in two models:
5060-001
5060-002
Tools required for service
Flat-blade screwdriver
#1 Phillips screwdriver, magnetic
#2 Phillips screwdriver, magnetic
#2 Phillips screwdriver, magnetic short-blade
T10 Torx screwdriver
Needlenose pliers
Diagonal pliers
Spring hook
Feeler gauges
Analog or digital multimeter
Parallel wrap plug 1319128
Serial wrap plug 1329048
Twinax/serial debug cable 1381963
Coax/serial debug cable 1381964
Flashlight or light source (recommended)
General information 1-1
5060-00x
Options and features
LexmarkTM C750 printers support only Lexmark C750 paper-handling options. These options are not compatible
with any other Lexmark printer.
•500-Sheet Drawer - (includes 500-sheet tray and support unit) installs beneath the printer and holds
approximately 500-sheets of 20 lb paper. Multiple optional drawers are supported simultaneously.
•2,000-Sheet Drawer - installs beneath the printer and below any other optional input sources and holds
approximately 2,000 sheets of 20 lb paper.
•500-Sheet Tray - for environments with space or budget constraints this can be ordered for special media.
This temporarily replaces the standard tray in a 500-sheet drawer and holds approximately 500-sheets of
20 lb paper.
•Duplex Option - offers two-side printing.
•Output Expander - installs above the printer's primary output bin to offer an additional output destination.
This holds approximately 650 sheets of 20 lb paper. Only one output option above the printer is supported.
•5-Bin Mailbox - installs above the printer's primary output bin to offer five output destinations in one part.
Each of the five bins supports approximately 100 pages of 20 lb paper. Only one output option above the
printer is supported.
•Finisher - offers stapling, hole punching, offset stacking and an additional output bin. Two models are
available. Hole punching for 2-, 3- or 4-hole left-edge is available. The single staple position is the upper
left corner. The finisher supports up to 3,000 sheets of non-stapled, non-punched media. For stapled
media, the output bin supports up to 90 stapled sets or 2,700 sheets. The stapler staples a maximum of 30
sheets per set. Each printer supports one finisher.
High performance
•Up to 20 ppm black or color
•350 MHz RISC processor
•64MB RAM
•Time to first page
– Black: less than 17.5 seconds
– Color: less than 20 seconds
Print quality
True 1200 x 1200 dpi and 2400 image quality
Heavy volume reliability
•Up to 4,000-page average monthly duty cycle
•Up to 60,000-page maximum duty cycle based on a single month usage
Automatic calibration
The printer performs an automatic calibration under the following conditions.
•At power-on
•After 8 hours of power saver
•Approximately every 500 pages, at the end of a job
•After changing a print cartridge
•After changing an intermediate transfer unit
A manual calibration can be initiated by selecting Color Adjustment from the Utilities Menu.
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Resolution
•1200 x 1200 dpi
•2400 image quality
Toner darkness
Toner darkness settings offer five user-selectable settings to balance print darkness and toner savings. The
higher the setting, the darker the print. The toner darkness default setting is 4. Color level 4 and level 5 are the
same.
The toner darkness setting is available through the operator panel under the Print Quality menu or through the
Lexmark C750 PostScript emulation driver.
Printer specifications
Dimensions
DescriptionWidthDepthHeightWeight
Printer
Lexmark C750(n) 23.8 in. (604.5 mm) 18.5 in. (469.9 mm) 20.8 in. (528.3 mm) 105 lb (47.7 kg)
Lexmark C750dn (inc.
Duplex Opton)
Options
Duplex Option23.8 in. (604.5 mm) 18.5 in. (469.9 mm) 3.5 in. (88.9 mm)13.5 lb (6.1 kg)
2,000-Sheet Tray26 in. (660.4 mm)23.8 in. (604.5 mm) 15.4 in. (391.2 mm) 49 lb (22.3 kg)
Output Expander14.5 in. (368.3 mm) 18.5 in. (469.9 mm) 7 in (177.8 mm)4.5 lb (2 kg)
500-Sheet Drawer23.8 in. (604.5 mm) 18.5 in. (469.9 mm) 5 in. (127 mm)13.5 lb (6.1 kg)
500-Sheet Tray17.3 in. (440 mm)16.1 in. (410 mm)4.3 in. (110 mm)4.5 lb (2.0 kg)
5-Bin Mailbox14.5 in. (368.3 mm) 18.5 in. (469.9 mm) 11.5 in. (292.1 mm) 8.2 lb (3.7 kg)
Finisher33.5 in. (850.9 mm) 28.1 in. (713.7 mm) 35.1 in. (892 mm)93.5 lb (42.5 kg)
23.8 in. (604.5 mm) 18.5 in. (469.9 mm) 24.3 in (617.2 mm)118 lb (53.8 kg)
Power and electrical specifications
Average nominal power requirements for the base printer configuration (110 volt). (Power levels are shown in
watts.)
Printing statesLexmark C750(n)Lexmark C750dn
Printing - average power
Base model500500
All options540540
Idle - average power
Power Saver On3031
Power Saver Off154145
Printing - maximum current (110 V)10.210.2
Note: Using a 220 to 110 power converter with the 110 volt printer is not recommended.
General information 1-3
5060-00x
Electrical specifications
110 volt model
•110 to 127 V ac at 47 to 63 hertz (hz) nominal
•99 to 137 V ac, extreme
Operating clearances
Printer sideModelMeasurement
Left sideAll24 in. (609.6 mm)
Right sideAll15 in. (381 mm)
FrontAll20 in. (508 mm)
RearAll12 in. (304.8 mm)
TopC750(n)42 in. (1,066.8 mm)
C750dn34 in. (863.6 mm)
1
Allow 1,219.2 mm (48 in.) clearance to the right if you are adding a finisher.
2
Allow clearance above the printer front door clearance and for adding options, such as
additional input drawers, output expander or 5-bin mailbox.
1
2
2
Fuser web oiler upgrade kit and replacements
The web oiler removes fuser roll contamination in machines which run a large number of
vinyl or dual web labels. The web oiler works with all media types and enables the
prolonged use of labels without sacrificing fuser life.
•Web oiler life:100,000 pages
•Availability: Order the web oiler upgrade kit.
Upgrade kit
DescriptionPart number
115 V web oiler upgrade kit12G6514
220 V web oiler upgrade kit12G6515
100 V web oiler upgrade kit12G6502
The installation of the web oiler upgrade kit converts a standard
Lexmark C750 printer to an oil web capable printer. The web oiler
upgrade kit includes an oiler fuser and web oiler.
Replacements
DescriptionPart number
115 V web oiler fuser12G6514
220 V web oiler fuser12G6515
100 V web oiler fuser12G6502
Web oiler replacement12G6545
1-4 Service Manual
5060-00x
Acoustics
All measurements are made in accordance with ISO 7779 and conform with ISO 9296.
ModelStatus
Lexmark C750(n)2400 image quality printing51 dBA
Lexmark C750dn2400 image quality printing53 dBA
Environment
Printer temperature and humidity
•Operating
•Power off
•Ambient operating environment*
•Storage and shipping (packaged printer) with or without print cartridge
•Print cartridge
1-Meter average sound
pressure
Idle (standby)42 dBA
Idle (standby)42 dBA
– Temperature: 60 to 90° F (15.6 to 32.3° C)
– Relative humidity: 8 to 80%
– Maximum wet bulb temperature: 73° F (22.8° C)
– Altitude: 10,000 ft. (0 to 3,048 meters)
– Atmospheric pressure: 74.6 kPa
– Temperature: 50 to 110° F (10 to 43.3° C)
– Relative humidity: 8 to 80%
– Maximum wet bulb temperature: 80.1° F (26.7° C)
– Altitude: 10,000 ft. (0 to 3,048 meters)
– Atmospheric pressure: 74.6 kPa
– Temperature: 60 to 90° F (15.6 to 32.2° C)
– Relative humidity: 8 to 80%
– Temperature: -40 to 110° F (-40 to 43.3° C)
– Temperature: -40 to 110° F (-40 to 43.3° C)
In some cases, performance specifications (such as paper OCF, EP cartridge usage) are measured at an
ambient condition.
General information 1-5
5060-00x
Print speed and performance print speed
2400 Image quality1200 x 1200 dpi
Simplex printing on letter-size media (pages per minute)
Letter—8.5 in. x 11 in.2010
A4—8.3 in. x 11.7 in.199.5
Legal—8.5 in. x 14 in.16.28.1
Transparencies1010
Envelopes1010
Duplex printing on letter-size media (sides per minute)
Letter—8.5 in. x 11 in.2010
A4—8.3 in. x 11.7 in.199.5
Legal—8.5 in. x 14 in.16.2
Performance
Performance speed depends on:
•Interface to the host (USB, serial, parallel, network)
•Host system and application
•Page complexity and content
•Printer options installed or selected
•Available printer memory
•Media size and type
•Resolution
•Printer usage setting
Time to first print
Time to first print from standby mode:
•Black: <17.5 seconds
•Color: <20 seconds
Time to first print from power saver mode:
•Black: <180 seconds
•Color: <180 seconds
Note: All first copy times are measured for 2400 image quality, simplex printing on letter-size paper, The test job
consists of the character “A” followed by a form feed (single-page job). The first copy time is defined as the
elapsed time from hitting enter on the PC keyboard to the page exiting to the output bin. All tests will pick paper
from the primary input tray and the page will exit into the primary output bin.
Processor
350 MHz
Duty cycle
•
Up to 60K page maximum one-time usage
•Up to 4K pages per month average usage
1-6 Service Manual
5060-00x
Memory configuration
DRAM memoryLexmark C750(n)Lexmark C750dn
Standard64MB128MB
Maximum512MB512MB
Available memory options
Optional 64MB, 128MB and 256MB SDRAM DIMMs are available from Lexmark. The memory options are 168pin synchronous DRAM DIMMs (dual in-line memory modules).
•On-board hard disk interface (for optional hard disk): 1
Additional memory may be required for printing complex pages or full-page, high-resolution images in 1200
image quality at rated speeds.
Media specifications
Media type
Media type
Paperxxxxxxxx
Card stockxx xx x
Transparenciesxx x x
Envelopesx
Vinyl labelsxx x x
Paper labelsxx xx x
Polyester labelsxx x x
500-Sheet input
Multi-purpose tray
2,000-Sheet drawer
Duplex
Standard output
5-Bin Mailbox
Output Expander
Finisher to staple,
hole punch, offset stack
or with output bin
Dual web labelsxx xx x
Integrated labelsxx xx x
General information 1-7
5060-00x
Media size
Media size supported
500-Sheet input
Multi-purpose tray
2,000-Sheet drawer
Duplex
Standard output
5-Bin Mailbox
Output Expander
Finisher to staple,
hole punch, offset
stack or with output bin
A4 8.27 in. x 11.7 in.
(210 mm x 297 mm)
A5 5.83 in. x 8.27in.
(148 mm x 210 mm)
JIS-B5 7.17 in. x 10.23 in. (182 mm x
257 mm)
Statement 5.5 in. x 8.5 in. (140 mm x
216 mm)
4
Letter 8.5 in. x 11 in.
(216 mm x 279 mm)
Folio 8.5 in. x 13 in.
(216 mm x 330 mm)
4
Legal 8.5 in. x 14 in.
(216 mm x 256 mm)
Executive 7.25 in. x 10.5 in. (184 mm x
267 mm)
Universal
1
xxxxxxxx
xxxxx xx
xxxxxxxx
xx xx xx
xxxx xxxx
xx xxxxx
xxxxxxxx
xxxxxxxx
5, 6, 7
5
5
5
5, 6, 7
5, 6, 7
5, 6, 7
6, 7
5.5 x 8.27 in. to 8.5 x 14 in. (139.7 x 210
mm to 215.9 x 355.6 mm)
2.75 x 5 in. to 8.5 x 14 in. (69.85 x 127
mm to 229 x 355.6 mm)
5.83 x 7.17 in. to 8.5 x 14 in. (148 x 182
mm to 215.9 x 355.6 mm)
7 ¾ Envelope 3.875 in. x 7.5 in. (98 mm
x 191 mm)
9 Envelope 3.875 in. x 8.9 in. (98 mm x
225.4 mm)
10 Envelope 4.125 in. x 9.5 in. (105 mm
x 241 mm)
DL envelope 4.33 in. x 8.66 in. (110 mm
x 220 mm)
C5 envelope 6.38 in. x 9.01 in. (162 mm
x 229 mm)
B5 envelope 6.93 in. x 9.84 in. (176 mm
x 250 mm)
1-8 Service Manual
xx xx x
x x
xx x x
x x x
x x x
x x x
x x x
x x x
x x x
5060-00x
Media size supported
500-Sheet input
Multi-purpose tray
2,000-Sheet drawer
Duplex
Standard output
5-Bin Mailbox
Output Expander
Finisher to staple,
hole punch, offset
stack or with output bin
Other envelope
3
3.87 x 6.38 in. to 6.93 x 9.84 in. (98.4 x
x x x
162 mm to 176 x 250 mm)
1
When Universal is selected, the page is formatted for 8.5 x 14 in. (215.9 x 355.6 mm), unless
the size is specified in the software application.
2
Narrow media should be loaded with the length in the feed direction (portrait).
3
When Other Envelope is selected, the page is formatted for 8.5 x 14 in. (215.9 x 355.6 mm)
unless the size is specified in the software application.
4
Statement and Folio are supported as standard size through software only. Tray size sensing
must be turned off before this standard size is visible in the paper-size menu on the operator
panel.
5
2-hole punch is supported.
6
3-hole punch is supported.
7
4-hole punch is supported.
General information 1-9
5060-00x
Input media types and weights
MediaWeight
Integrated trays
b, f
Paper
Xerographic or business paper16 to 19.9 lb bond (60 to 74.9 g/m2 grain long)
Specialty papers Gloss book60 to 120 lb book (88 to 176 g/m
Card stock - upper
limit (grain long)
Card stock - upper
limit (grain short)
Transparencies
Labels - upper limitPaper48 lb bond (180 g/m
Integrated formsPressure sensitive area
Multipurpose feeder
b, f
Paper
Xerographic or business paper16 to 19.9 lb bond (60 to 74.9 g/m2 grain long)
Specialty papersGloss book60 to 120 lb book (88 to 176 g/m
Card stock - upper
limit (grain long)
Card stock - upper
limit (grain short)
Transparencies
Labels - upper limitPaper53 lb bond (199 g/m