Ricoh Ch-C1 Series Service Training page 598

 The side-to-side folder unit moves back to the upper track,
and then drops to the lower track.
 Then the rest of the side-to side fold is done while the fold
plate returns to its home position, where the fold plate HP
sensor [B] detects the actuator on the fold plate.
Slide 598
 Details about the pressing operation are shown later.
Folding Process - 3
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Ch-C1 Training