Read Sharp MX-6240N / MX-7040N (serv.man32) Service Manual online
MX-7040N OPERATIONAL DESCRIPTIONS 13 – 17
b. Paper feed operation
• When copy/print operation is started, the motor and the clutch
are turned ON to rotate the pickup roller in the paper pickup tim-
ing, feeding paper.
ing, feeding paper.
• At the same time, the paper feed roller rotates to transport paper
to the transport section. At that time, the separation roller rotates
to prevent against double feed of paper.
to prevent against double feed of paper.
c. Paper remaining detection
• The notifying levels of paper remaining quantity are 4 steps in
total; 3 steps of paper remaining quantity and 1 step of paper
empty. The result is displayed.
empty. The result is displayed.
d. Paper remaining quantity detection method
• The paper remaining quantity is judged from the number of rota-
tions of the remaining quantity sensor from starting the lift-up
operation of the paper feed tray to turning ON the upper limit
sensor.
operation of the paper feed tray to turning ON the upper limit
sensor.
The no-paper detection sensor detects
the state of no remaining paper.
the state of no remaining paper.
During no-paper detection
1/3 Field
Sensor logic: Low
Sensor logic: Low
Remaining paper 1/3 position
Remaining paper 2/3 position
Remaining paper 3/3 position
2/3 Field
Sensor logic: Hi
Sensor logic: Hi
3/3 Field
Sensor logic: Low
Sensor logic: Low
CPED
(paper sensor)
(paper sensor)
Remaining Paper
Detection Actuator
Detection Actuator
Turn plate
CSPD
(remaining paper detection)
(remaining paper detection)
(Figure showing state transition of the remaining paper detection sensor during tray elevation and
changes in status according to the number of remaining sheets)
changes in status according to the number of remaining sheets)
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