Service manual

AR-M351U/M451U, AR-M355U/M455U MAINTENANCE AND DETAILS OF EACH SECTION 7 - 30
[Paper remaining quantity detection]
(1) Paper remaining quantity detection
Paper remaining quantity detection is common in each tray except for the manual feed tray. Remaining quantity is indicated in 3 steps plus
paper empty (4 steps in total).
(2) Detection method
Paper remaining quantity is detected by the number of times of changing of the remaining quantity sensor from when the tray starts lifting up
to when the upper limit sensor turns on.
Paper empty is detected by
the paper empty sensor.
1/3 area
sensor logic LOW
2/3 area
sensor logic HIGH
3/3 area
sensor logic LOW
When paper empty is detected
Paper remaining quantity at 1/3
Paper remaining quantity at 2/3
Paper remaining quantity at 3/3
Rotating plate
MCPED
(Paper empty sensor)
Paper remaining quantity
detection actuator
MCSPD
(Paper remaining quantity sensor)
(Remaining quantity sensor status change when the tray is moving up and remaining quantity)
Indication of remaining quantity Sensor status
Paper quantity: 100% Paper quantity sensor: OFF
Paper quantity: 66% Paper quantity sensor: ON
Paper quantity: 33% Paper quantity sensor: OFF (2nd time)
Paper quantity: 0% Paper sensor: OFF