Panasonic FP-D250 User Manual page 43

2) Paper feed unit operation
• When the start key is pressed, the paper feed clutch turns ON.
The drive from the main motor is transmitted to the idler gear through the
respective gears and belts, rotating the idler gear which is connected to the
middle roller clutch.
Note : The paper speed control clutch turns ON for the first copy fed from the
drawer (upper and lower) of the copier.
The paper feed speed control clutch allows the first copy to be fed at
the faster speed than the copies which follow it.
• The paper feed solenoid turns on, pushing the pick up roller to the paper. The
paper feed clutch turns on to rotate the pick up roller and paper feed roller,
which feeds the paper in the cassette to the middle roller.
• The double feed prevention roller contacts the paper feed roller pinching the
paper at a specific pressure.
The rotating force of the double feed prevention roller is under specific torque.
When multiple sheets are fed, the double feed prevention roller rotates in the
reverse direction feeding the bottom paper back into the drawer.
• The paper pass sensor checks the paper feed from the drawer. If the paper is
not detected by the paper pass sensor within a specified time the Retry system
is employed.
• The paper arrives at the middle roller, and is detected by the paper pass sensor
on the way to the registration roller.
After a specified time, it touches the registration roller and is held in place.
• After a specified time following the optics system start, the lamp unit home
position sensor detects the passing of the optics system (full-speed unit), the
registration roller clutch turns ON and the registration roller rotates. Accordingly
the paper is fed into the image transfer area and the registration of original and
copy paper is achieved.
Middle roller
Paper pass sensor
Middle roller
Paper feed clutch
2-6
Paper feed roller
DFP roller
Paper detecting sensor
Paper limit sensor
Pick-up roller
Paper feed solenoid