Printer functions Printer functions are divided into six groups: 1 ECU/power system 2 formatter system 3 image formation system 4 printer paper feed system 5 document scanner system 6 basic sequence of operation (formatter to printer) The following figure is a block diagram of the printer unit:
To external device (host computer, etc.) via video controller LASER/SCANNER SYSTEM ENGINE CONTROL SYSTEM Scanning mirror Face-down delivery tray Laser diode BD circuit Engine controller PCB Scanner motor IMAGE FORMATION SYSTEM Manual feed slot Multi-purpose tray Face-up delivery slot Primary charging roller Developing unit Photo- sensitive drum Cleaner unit Fixing Transfer charging roller Pick-up control PICK-UP/FEED SYSTEM Figure 3-2 Printer unit functional block diagram C4224-90962 Printer functions 43