Ricoh JP5800 Service Manual page 51

1) When the paper bank receives the pick-up start command, it turns on the tray feed motor in the paper bank, and this
starts the tray registration roller. Then, it turns on the tray exit clutch and stops the tray feed motor. At that time, the
trial sheet has been sent to the tray registration roller and is held there.
2) When the paper bank receives the feed start command, after a certain delay, the tray registration motor feeds 218
steps. This feeds the paper into the main body, and the main body paper feed mechanisms take over.
3) When the tray feed start sensor detects the 0-degree actuator, the tray feed motor operates until the tray registration
sensor activates. At that time, the next sheet of paper is held at the tray registration roller.
4) When the tray feed start sensor detects the 104-degree actuator, the tray registration motor turns 218 steps after a
certain delay. The tray registration roller feeds the paper from the paper bank to the main body.
RxD: Command signals from the main body to the paper bank.