02/20006-33DocuPrint N2125 GP 3.3 , GP 3.4General Procedures / InformationInitial IssueDrive transmission to the Exit ComponentsAs shown in Figure 8, the mechanical energy created by the Exit Motor Assembly providesdrive to the gears located on the Roll Assembly.Figure 8 Drive transmission to the Exit ComponentsGP 3.4 Print Engine Controller and Control PanelFunctionsThe Print Engine Controller PWB performs eight main functions:1. Communicates with the System Controller.2. Controls the print sequence.3. Controls the Fuser Assembly, Laser Assembly, and Drive components.4. Distributes low DC voltages to various printer components.5. Monitors printer status.6. Maintains a running print count.7. Writes the NVRAM settings.8. Controls printer options.The Print Engine Controller PWB uses a 32 bit microcomputer and ASICs (Application SpecificIntegrated Circuits). The 32 bit microcomputer includes ROM, RAM, a 16 bit integrated timer, aprogrammable timing pattern controller, a watch dog timer, serial communication interfaces, anA/D converter, a D/A converter, I/O ports, a DMA controller, and a refresh controller.The System Controller connects to the Print Engine Controller PWB directly. The Control Panelis connected to the System Controller and signals pass through the Print Engine ControllerPWB via the System Controller.
