Basic sequence of operation (formatter to printer) The formatter and the ECU share information during printer operation. The ECU-to-formatter connector (J201) forms a link that operates as a serial data bus. This allows printer status, command information, and dot-image data to be passed between the two. The following events take place during normal printer operation: 58 Functional Overview C4224-90962 Period Purpose Remarks WAIT From the power-ON until the end of the main motor initial rotation. To clear the drum surface of potential and to clean the transfer charging roller. Detects whether the cartridge is installed or not.
STBY (Standby) From the end of the WAIT period or the LSTR period until the pick-up command is input from the video controller. Or, from the end of the LSTR period until power-OFF. To keep the printer ready to print. INTR Initial Rotation Period After the pick-up command has been input from the video controller until the paper reaches the paper top sensor. To stabilize the photosensitive drum sensitivity in preparation for printing. Also to clean the transfer charging roller. PRINT (Print) From the end of the initial rotation until the primary voltage goes OFF.
To form images on the photosensitive drum based on the VIDEO signals (/VDO, VDO) input from the video controller and to transfer the toner image onto the paper. LSTR (Last Rotation Period) After the primary voltage goes OFF until the main motor stops rotating. To delivery the last page. Also to clean the transfer charging roller. When the pick-up command is input from the video controller, the printer enters the INTR period immediately after the end of the LSTR period.