02/20006-57DocuPrint N2025/N2825 GP 5.2, GP 5.3General Procedures / InformationInitial IssueThe figure below is a cut-away side view of the N2025/N2825 printer that shows the paperpaths and the major components directly related to the paper transportation Figure 2. For thepaper paths and the major components directly related to the paper transportation when the500 Sheet Feeder units (Tray 2, Tray 3, High Capacity Feeder and Duplex) are installed, refer tothe options service manual.Figure 2 Paper Path ComponentsGP 5.3 Print Image CreationThe printers NIC (Network Interface Card) connected to the network receives packets from aclient or the server on the network in a bit stream, and disassembles the received packets intothe data format for the layer in which the data is passed to the Controller. The Controller han-dles the data from the NIC in the same manner as the data that it receives from the host com-puter through the parallel port. (Both types of data are referred to as host data.)The Controller buffers the host data in rasterized bit image data or converted host data in aPDL (Page Description Language) into rasterized bit image data. The Controller sends this ras-terized bit image data to the Print Engine Controller PWB line by line for each scan of the laserbeam.The signal conveying image data (/VDO signal) is sent from the Controller to the Laser via thePrint Engine Controller PWB. The signal is passed through the Print Engine Controller PWB tothe Laser as the /P.DATA signal as received from the Controller without buffering or processing.In the Laser, the signal is converted into laser light which is emitted in a very thin beam beingswitched on and off according to the video signal. The laser light beam is reflected off the sur-face of the rotating Polygon Mirror, then it is focused by a series of lenses and onto the surfaceof the drum in the Print Cartridge. As the result, and electrostatic latent image is produced onthe drum surface Figure 1.Figure 1 Print Image Creation
