Gp 3.4 Print Engine Controller And Control Panel Functions - Xerox N2125N - DocuPrint B/W Laser Printer Service Manual

Drive transmission to the Exit Components
As shown in Figure 8, the mechanical energy created by the Exit Motor Assembly provides
drive to the gears located on the Roll Assembly.
Figure 8 Drive transmission to the Exit Components
Initial Issue
DocuPrint N2125
GP 3.4 Print Engine Controller and Control Panel
Functions
The 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 Specific
Integrated Circuits). The 32 bit microcomputer includes ROM, RAM, a 16 bit integrated timer, a
programmable timing pattern controller, a watch dog timer, serial communication interfaces, an
A/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 Panel
is connected to the System Controller and signals pass through the Print Engine Controller
PWB via the System Controller.
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General Procedures / Information
GP 3.3 , GP 3.4