Printer functionality and operation Four major systems make up the HP LaserJet 2200 printer and allow it to operate. Each system works independently to accomplish its task, but must be coordinated with the other systems to successfully produce a printed page. Understanding these systems, their function, and how they interact with each other is the key to troubleshooting any problem. See "Troubleshooting process" in chapter 7 for detailed information about the HP LaserJet 2200. The HP LaserJet 2200 printer’s four major systems are as follows: "Formatter system" page 74—Receives print data from the host, processes the image, and transfers it to the engine control system.
The formatter system also provides the interface between the user and the printer (control panel). "Engine control system" page 77—Monitors and controls all of the printer’s mechanical and electrical subsystems. It is the center of the printer’s operation. "Image formation system" page 80—Produces the actual physical image on the page. "Pickup/feed system" page 86—Moves paper or other print media through the printer from one of the selected input trays (tray 1, 2, or 3) to the selected output bin (top or rear).
Formatter system Print data from Host system Control panel I/O subsystem Central processor Memory Engine control system Engine controller PCB Power supply Laser/scanner assembly Scanning mirror Tray 1 Laser diode Scanner motor Toner cartridge Duplexer Primary charging roller Developing unit Cleaning unit EP drum Tray 2 Paper exits printer Transfer roller Fuser assembly Tray 3 Image formation system Figure 35. Printer functionality divided into systems Paper pickup and feed system C7058-90936 Printer functionality and operation 73