Ricoh SP 8400DN Field Service Manual page 1944

2. Detailed Descriptions
Stapler displacement mechanism
The stapler unit [A] staples the stack of sheets.
The stapling position changes with the stapling mode and paper size.
When the operation starts after power is switched on, or the front door opens and closes, the main
controller board drives the stapler transfer motor [B] to return the stapler unit to the home position.
The stapler unit starts to transfer the paper to the front side of the stapler frame, and when the
stapler HP sensor [C] under the stapler unit detects the screen, it temporarily stops. Then, the stapler
transfer motor is driven for a predetermined number of pulses. The stapler unit moves to the rear
side, and stands by.
To prevent the stapler unit colliding with the feedout pawl and trailing edge fences, a stapler retreat
sensor is provided.
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