Basic operations Power-on sequence The sequence from power-on until the printer enters the standby (STBY) mode: 1 Power-on. 2 CPU initialization. 3 Formatter communication start. 4 Fusing heater drive. 5 Main motor, Reverse motor, and fan drive—Reads the paper-detecting status of each sensor in the printer immediately before driving the main motor, and assesses a jam if residual media is detected. 6 High-voltage control—Detects the cartridge presence and cleans the transfer charging roller after the primary charging ac bias is turned on. 7 Residual paper check—After starting the main motor, detection of residual media in the printer resumes.
If residual media is detected, the printer assesses a jam or automatically delivers the residual media, according to the situation. 8 Failure or abnormality check—Detects door-open, fan-motor, and fuser-unit failures during the other sequence periods. 70 Chapter 5 Theory of operation C7058-90936