Ricoh SP 8400DN Field Service Manual page 2104

2.Detailed Descriptions
stack position.
3. The rotation of the relay transport roller [C] and the pre-stack roller [B] stops, and the pre-stack junction gate
[A] moves up (opens). The shift roller [D] also moves up to release the pressure between itself [D] and the
relay transport roller [C].
4. The following sheet comes through the entrance and reaches the relay transport path. After that, the shift
roller [A] drops to press the pre-stacked sheet and the following sheet. Then with the pre-stacked sheet, the
following sheet goes to the next process (corner stapling).
Upper Tray Shift Drive / Limit Sensor / Full Sensor
Upper Tray Shift Up/down
The upper tray lift motor [A] moves the upper tray up/down.
Upper-position Detection
With the actuator, the shift paper height sensor [B] detects the upper position of the tray (without output paper).
The upper tray height limit switch [C] prevents the tray from moving up too much. When the upper tray moves up
to the upper position but doesn't stop, the upper tray height limit switch is pushed and the tray shift motor [A]
stops.
Upper Tray Full Detection
Condition 1
There are five tray full sensors [D] on the rear side of the machine, but Shift Tray Lower Limit Sensor 2 and 4 are
46