Dell 5110cn Color Laser Printer Service Manual - Page 551

Chapter 6 Principles of Operation 3.5 Outer Duplex Assembly 3.5.1 Major functions - SENSOR PHOTO (Full Stack Sensor) Detects that the prints discharged onto the top cover have accumulated more than specified number of sheets based on the change of position of the actuator. (Full stack: Sensor beam is received) - SENSOR PHOTO (Dup Jam Sensor) Detects that paper has reached and passed through the ROLL DUP based on the change of position of the actuator. (Paper present: Sensor beam is received) - SENSOR PHOTO (MSI No Paper Sensor) Detects existence or non existence of paper on the manual feed tray based on the change of position of the actuator. (No paper: Sensor beam is intercepted) - MALTIPURPOSE FEEDER (MPF) SOLENOID Controls the operation (rotation/stop) of MULTIPURPOSE FEEDER (MPF) ROLLER by controlling the rotations of the GEAR MSI. - MALTIPURPOSE FEEDER (MPF) ROLLER When the MALTIPURPOSE FEEDER (MPF) SOLENOID operates, the GEAR MSI and Gear IDLER are engaged by the force of the SPRING FEED H, the MALTIPURPOSE FEEDER (MPF) ROLLER starts rotating under the drive from the MAIN DRIVE ASSEMBLY, and feeds paper from the manual feed tray. After having rotated one turn, the GEAR MSI and Gear IDLER are disengaged at the notch of the GEAR MSI, drive is not transmitted any more, and the MALTIPURPOSE FEEDER (MPF) ROLLER stops rotating. Thus sheets of paper are fed one by one. - ROLL DUP The ROLL DUP rotates under the drive from the MOTOR ASSY DUP and feeds paper printed on simplex returned from the CHUTE ASSY EXIT to the ROLL TURN. - MOTOR ASSY DUP 17PM It supplies the driving power to ROLL EXIT and ROLL DUP. - ROLL EXIT ROLL EXIT receives the driving power from MOTOR ASSY DUP 17PM and rotates, and transports the printed paper after fixing onto the top cover. Furthermore, it rotates reversely, in the case of duplex mode, to transport the printed paper after fixing of one side toward REGI direction. 6 - 32