Sheet Bypass; Sheet Bypass Operation - Panasonic DP-1820P Service Manual

2. Sheet Bypass

< NP Sensor Operation >
a. The NP Actuator attached to the Paper Feed Unit determines if there is paper in the paper tray.
b. The paper in the paper tray lowers the NP Actuator and the NP Sensor actuates.
< Sheet Bypass Operation >
Pressure Plate
a. When the printing operation begins, the PRINT (Print Request Signal) turns On and the Main Motor
starts driving the Gears.
b. The Clutch is energized for a specified period of time and turns ON. This activates the Paper Feed
Roller. The paper is raised by the Pressure Plate and transported to the Separate Roller. The paper
is separated into individual sheets by the Separate Roller.
c. The paper is transported to the Registration Roller, activating the Registration Sensor.
d. After a specified period of time, the Clutch is turned ON and the Registration Roller and the
Registration Pinch Roller start rotating. The paper is transported to the OPC drum area.
After lowering the Pressure Plate during the specified period of time, the Clutch is turned OFF and
the Paper Feed Roller stops rotating.
e. After the trailing edge of the paper passes the Registration Sensor and after a specified period of
time, the Clutch is turned OFF. The Registration Roller and the Registration Pinch Roller stop
rotating.
Ver. 1.2
Feed Roller
NP Actuator
NP Sensor
246
DP-1520P/1820P/1820E
Sparate Roller
SEP 2004