Panasonic DP-150 Service Manual page 21

2)Operation of the sheet bypass paper feed unit
•
When starting copying with the sheet bypass selected, the rotation of the main
motor is transmitted to the transmission gear via drive gears and to the registration
roller gear in the sheet bypass paper feed unit. The rotation of the registration
roller gear is transmitted to the sheet bypass solenoid via middle roller.
•
When the sheet bypass solenoid is turned ON, the sheet bypass pick up roller
comes down and touches the paper in the tray. At the same time the stopper is
released and the tray is ready to feed the paper.
•
When the sheet bypass clutch is turned ON, the sheet bypass pick up roller touching
the paper and the sheet bypass paper feed roller start rotating to send paper into
the machine.
•
The paper advances then stops and forms a buckle (skew correction) at the
registration rollers. Then the sheet bypass clutch is turned OFF and the sheet
bypass paper feed and sheet bypass pick up roller stop. At the same time the
sheet bypass solenoid is also turned OFF and the sheet bypass pick up roller lifts
up.
•
The registration roller solenoid energizes to rotate the registration roller after a
predetermine time elapses after the optics system (uniform-velocity unit).
Accordingly the paper is sent to the image transfer unit and the original and copy
paper are registered there.
Registration
roller
Registration gear
Mechanical clutch
Sheet bypass pick-up roller
Sheet bypass DFP roller
Sheet
bypass
paper feed
roller
2-3