Ricoh SP 8400DN Field Service Manual page 1937

Shift tray ascent/descent mechanism
Ascent/descent is performed according to the number of sheets of paper (paper surface height)
released to the shift tray. This height is detected by the shift tray paper surface sensor [B] switching
OFF/ON due to the rear end press lever [A], and is adjusted up and down by the tray lift motor [C] so
that the shift tray paper surface sensor switches OFF (blocked).
Ascent
The shift tray paper surface sensor detects the movement upper limit of the shift tray, and
disconnects the control circuit of the tray lift motor.
When paper is removed from the shift tray and the shift tray paper surface sensor switches ON
(unblocked), the shift tray ascends, and when the sensor switches OFF (blocked), it stops.
Descent
• In shift mode
When every 5 sheets of paper are delivered to the shift tray, the tray moves up and down.
The shift tray first descends until the shift tray paper surface sensor switches ON (unblocked),
and the shift tray then ascends until the sensor switches OFF (blocked).
• In stapling mode
When exiting the paper to the shift tray, the tray lift motor switches ON/OFF for a definite
time, and the tray height is adjusted.
Booklet Finisher SR3220 / Finisher SR3210 (D3B9/D3B8)
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