Paper Feed And Separation - Ricoh A028 Service Training Manual

Large Capacity Tray
Operation in detection overrun
After the upper or lower overrun switch comes ON, Error
reset #63 is displayed. When the main switch is turned
OFF and ON, the power supply of the tray motor
connects for about 1 second by the overrun control
board, and the tray motor operates normally again.
(However, detection is tried two more times until Error
reset #63 is displayed.)
Paper volume detection
Paper volume sensing of the LCT is done here in a way
that is similar to the main body tray arrangement with a
pulse generator disk mounted on a worm gear shaft.
When paper is not set, even if the tray is set, the tray
motor does not operate.

2.16.3 Paper feed and separation

An FRR system is employed in the paper feed and
separation mechanism, similar to that used in the main
body tray, but the grip roller is driven by the transport
motor via a magnetic clutch.
The transport motor drives the upper transport unit and
is always ON to transport the paper from the main body
to the sorter.
As the grip roller is not required to be driven, except
when paper is fed from the LCT, the drive force is
controlled by the clutch.
Paper feed sensors 1 and 2 work similarly to those in the
main body tray.
NOTE
•
Paper feed sensor 1 detects jam detection and
turns the pick-up solenoid ON.
•
Paper feed sensor 2 turns the paper feed mo-
tor OFF and detects jam detection.
Paper feed roller
Reverse roller
Grip roller (drive)
Grip roller (driven)
2-138
Upper overrun
switch
Lower overrun
switch
Pick-up
solenoid
Upper limit sensor
Pick-up roller
Paper feed sensor board
Grip roller (drive)
Gear (30Z)
Paper feed magnetic clutch
1 July 1994
Paper feed motor
Transport motor