Ricoh BR-C1a Basic Service Training page 317

 The right tray has two solenoids [A] at the front and back.
 When paper in the right tray runs out, the solenoids turn on
and open both fences [B] until the front and back fence
open sensors [C] turn on.
Slide 317
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Tray 1 (Tandem Tray)
Tandem Tray Side Fences - 1
317
BR-C1 Training