Ricoh BR-C1a Basic Service Training page 320

 While the rear fence is moving to the right:
 The left tray lock solenoid [A] turns on to move lever [B],
 After the stack has been moved to the right tray and the
rear fence has returned to its home position on the left, the
lock solenoid turns off and unlocks the tray.
Slide 320
No additional notes
Tray 1 (Tandem Tray)
Left Tray Lock
which locks the tray to prevent the operator from opening
the tray while the right tray is being re-supplied with paper.
320
BR-C1 Training