Basic functions This chapter presents a functional overview of the HP LaserJet 3200 product’s processes. The following systems are discussed: optical system (document scanner) formatter printer functions • ECU (engine controller unit) system/power system • image formation system • paper-feed system (printer) and document-feed system (document scanner) The HP LaserJet 3200 product consists of the printer and the document scanner. Operation sequences of the printer are controlled by the ECU. Operation sequences of the document scanner are controlled by the formatter. Figure 7. Basic configuration 62 Chapter 4 - Operational overview EN