Brother International DCP-1400 Service Manual - Page 36

At the 1st stage, the controller drives the main motor without energizing the solenoid so that the paper feed roller simply idles. At the 2nd stage, the controller energizes the solenoid so that the paper feed roller no longer rotates and the paper pick-up roller starts rotating to pick up paper into the machine, a sheet at a time. After the leading edge of the pulled-in paper passes through the manual insertion sensor actuator, the paper is further fed for the specified time length. Accordingly, the leading edge will reach the paper feed roller where the paper skew will be eliminated. At the 3rd stage, the controller deenergizes the solenoid to rotate the paper feed roller for feeding paper to the transfer block in the drum unit. When the leading and trailing edges of the paper pass through the registration sensor actuator, the sensor signals them to the controller. According to those signals, the controller may determine the first print position on the paper. 2.2.2 Print process mechanism Paper ejection roller Heat-fixing unit Charger (Corona wire) Laser-sensitive drum Cleaner Mirrors Mirror Laser unit Polygon mirror Thermistor Polygon motor Heater roller Cover glass Developer roller Blade Agitator Toner sensor Drum unit Toner supply roller Paper feed roller O Paper ejection sensor actuator (Front) Paper cassette Manual insertion Registration sensor actuator sensor actuator III - 6