Paper Remaining Quantity Detection; Detection Method - Sharp AR-M455N Service Manual

[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.
(Remaining quantity sensor status change when the tray is moving up and remaining quantity)
Paper empty is detected by
the paper empty sensor.
When paper empty is detected
1/3 area
sensor logic LOW
Paper remaining quantity at 1/3
2/3 area
sensor logic HIGH
Paper remaining quantity at 2/3
3/3 area
sensor logic LOW
Paper remaining quantity at 3/3
Indication of remaining quantity
Paper quantity: 100%
Paper quantity: 66%
Paper quantity: 33%
Paper quantity: 0%
AR-M355N/M455N MAINTENANCE AND DETAILS OF EACH SECTION 7 - 30
Paper remaining quantity
detection actuator
MCSPD
(Paper remaining quantity sensor)
Sensor status
Paper quantity sensor: OFF
Paper quantity sensor: ON
Paper quantity sensor: OFF (2nd time)
Paper sensor: OFF
MCPED
(Paper empty sensor)
Rotating plate