Ricoh VT3500, Service Manual

Page: 83 / 330

4.7 PAPER RETURN MECHANISM
When the paper feed stops, there may still be some paper between the upper
and lower separation rollers. This mechanism returns any paper between the
rollers back to the paper stack on the paper table.
When the paper table has been lowered, the paper return motor [B] (stepping
motor) starts rotating. The paper return levers [A] then turn toward the paper
table, and push the paper between the upper and lower separation rollers
back onto the paper stack on the paper table.
The paper return levers turn toward the paper table for 900 milliseconds.
Then, The paper return motor starts rotating in reverse. This helps the spring
[D] pull back the levers. (In reverse, the motor does not turn the levers
directly through the gears because one gear [C] has a one-way clutch.) The
paper return motor keeps on rotating for 1.2 seconds. During this period the
paper return levers hit the edge of a bracket and stop. When the paper return
levers are stopped, the paper return motor is still turning. However, this
rotation is not transmitted to the levers due to the one-way clutch in the gear
[C].
[A]
[B]
[C]
[D]
[B]
[C]
Paper Table Drive Motor
Paper Return Motor Forward
Paper Return Motor Reverse
Separation Plate Release
Solenoid
500 msec
900 msec
1.2 sec
Printing End or Paper Misfeed
1 December 1993
2-47