Basic functions This chapter presents a functional overview of the HP LaserJet M1005 MFP. The following systems are discussed: ● device functions and operation ● engine controller unit (ECU) system/power system ● laser/scanner system ● image-formation system ● paper-feed system (device) and document-feed system (document scanner) ● formatter functions ● scanner functions and operation The full device consists of the following components: ● the scanner (the HP LaserJet M1005 MFP uses a flatbed contact image scanner (CIS)) ● the printer ● the formatter The ECU controls the operation sequences of the device. Figure 5-1 Device configuration 44 Chapter 5 Theory of Operation ENWW