Read Sharp MX-DE28 (serv.man2) Service Manual online
MX-DE28 OPERATIONAL DESCRIPTIONS 5 – 6
4. Paper level detection
A. Paper feed tray 2
The paper feeder detects the amount of paper remaining in the tray as one of four levels, and displays the level it has detected.
The paper feeder determines the remaining paper level based on how many times the paper level detector turns ON during the time between
the start of the lift-up of the paper feed tray and the activation (turning ON) of the upper limit detector.
the start of the lift-up of the paper feed tray and the activation (turning ON) of the upper limit detector.
State transition chart: How the paper level detector state changes according to the amount of paper actually remaining during tray
lift-up
lift-up
Paper empty detector detects
when there is no paper remaining.
1/3 range
Sensor: logical Low
2/3 range
Sensor: logical High
3/3 range
Sensor: logical Low
When there is no paper
Paper level 1/3 position
Paper level 2/3 position
Paper level 3/3 position
Rotary panel
Paper empty detector
(CPED2, D1PED, D2PED)
Actuator for detecting the
amount of remaining paper
Paper level detector
(CSPD2, D1PQD, D2PQD)
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