Lexmark 500n manual Details of the optical system, Description

Page 53

5023-110

Details of the optical system

In the optical system process, the printer utilizes a semiconductor laser diode as a light source. This laser diode is controlled by fast switching which matches the transmitted image data (video signal).

The generated laser light scans the OPC belt through a polygon mirror and lens. The electrostatic latent images are formed on the OPC belt.

The Optical printhead unit consists of following parts:

No.

Description

 

 

1

PD: photo detector

 

 

2

Polygon mirror: hexahedral mirror that reflects the laser beam

 

 

3

Cylinder lens: laser beam condenser

 

 

4

Laser unit: laser diode light emitting source

 

 

5

LDC: laser diode control circuit

 

 

6

BTD mirror: beam timing detector mirror to guide the laser beam to PD

 

 

7

Scanner motor: rotates the polygon mirror

 

 

8

F-lens: laser beam focus lens

 

 

9

Mirror: laser beam path reflecting mirror

 

 

General information 1-31

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Contents Lexmark C500n 5023-110 United States Government Rights 12G9663Table of contents Diagnostic information Diagnostic aids Locations and connectors Vii 5023-110 Laser advisory label Laser noticesClass 1 Laser statement label Laser Laser noticeAvvertenze sui prodotti laser Avis relatif à l’utilisation de laserAvisos sobre el láser Lasermeddelelse LaserinformatieLaser-notis Huomautus laserlaitteestaJapanese laser notice Laser-meldingAvís sobre el Làser Chinese laser notice Korean laser notice 5023-110 Norme di sicurezza Safety informationConsignes de sécurité Informações de Segurança SicherheitshinweisePautas de Seguridad Informació de Seguretat Conventions PrefaceTools required for service Maintenance approachSerial number Acronyms Resolution SpecificationsTechnical specifications Physical specifications and weightOperating clearances Packaging and shipping dimensionsPrint speed and performance Time to first printPrinter memory Paper and media specificationsDuty cycle Media input types and weights Media guidelines Media sizesOutput capacity by media and source Envelopes PaperTransparencies LabelsConnectivity Standard Interfaces Internal Print ServersEnvironment Power and electrical specificationsPrinter identification Printer theory of operation Printer paper path Mechanical and electrical structures Printer systems descriptionBasic principles of color printing Printer component systems Basic process of color printing Print system and transfer system Structure of OPC belt photo developer cartridge Basic structure of the print system CBV DBV Charging process Details of the print systemExposing process CBV Developing processTransfer belt Aluminum drum tube Film transfer belt First transfer drum processBelt discharge erase lamp process Belt cleaning process5023-110 Second transfer paper process Details of the transfer systemTransfer belt cleaning process Description Details of the optical systemPart Function Details of the paper transportation systemFusing unit Fusing process Control of print process Control system structureElectrical system and function Print sequence diagram Laser drive control circuit 5023-110