Lexmark 500n manual Details of the print system, Charging process

Page 45

5023-110

Details of the print system

Charging process

In the charging process, the OPC belt is evenly charged by the charger. See “Printer theory of operation” on page 1-14for charger unit location.

The charger unit consists of a charging brush and a discharge roller.

1.The charge brush charges the OPC belt surface to

-Vo(V) potential. The charge on the surface of the OPC belt is then smoothed to an even -Vo(V) by the discharge roller.

2.The charger unit controls the grid to a constant voltage of ZD(V) for even charging.

3.Before charging, the OPC belt surface is -CBV(V).

The charger unit evenly charges the OPC belt surface to -Vo(V) by generating a negative charge.

General information 1-23

Image 45

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 laserlaitteestaLaser-melding Avís sobre el LàserJapanese laser notice Chinese laser notice Korean laser notice 5023-110 Safety information Consignes de sécuritéNorme di sicurezza Sicherheitshinweise Pautas de SeguridadInformações de Segurança 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 printPaper and media specifications Duty cyclePrinter memory Media input types and weights Media sizes Output capacity by media and sourceMedia guidelines Envelopes PaperTransparencies LabelsConnectivity Standard Interfaces Internal Print ServersEnvironment Power and electrical specificationsPrinter identification Printer theory of operation Printer paper path Printer systems description Basic principles of color printingMechanical and electrical structures 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 system structure Electrical system and functionControl of print process Print sequence diagram Laser drive control circuit 5023-110