Read Sharp MX-DE25 / MX-26 / MX-27 Service Manual online
MX-DE27 N OPERATIONAL DESCRIPTIONS 4 – 5
2. Paper Empty Detection
The paper empty detector (C2PED, D1PED, D2PED) checks whether there is paper in the tray when the tray is lifted and stopped at a position
where it can feed paper, as well as during paper feed operation.
where it can feed paper, as well as during paper feed operation.
3. Paper Size Detection
The size of paper contained in each tray is detected based on the
status of each of desk rear edge detectors (switches) 1 to 4 as well
as on the destination-specific settings.
status of each of desk rear edge detectors (switches) 1 to 4 as well
as on the destination-specific settings.
A/B sizes
F: ON X: OFF
Inch-based sizes
F: ON X: OFF
4. Paper level detection
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
C2SS2
D1PRED2
D2PRED2
C2SS1
D1PRED1
D2PRED1
C2SS3
D1PRED3
D2PRED3
C2SS4
D1PRED4
D2PRED4
Rear edge detection switches
1
2
3
4
A3W
X
F
×
F
A3
X
F
F
F
B4
X
F
F
X
A4R
F
X
F
X
B5R
F
X
X
F
A4
F
F
X
F
B5
F
F
X
X
8.5 x 13
F
F
F
X
Rear edge detection switches
1
2
3
4
11 x 17
X
F
F
F
8.5 x 14
X
F
F
X
8.5 x 11
F
F
F
F
7.25 x 10.5R
F
X
X
F
8.5 x 11R
F
X
F
F
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
(C2PED, D1PED, D2PED)
Actuator for detecting the
amount of remaining paper
Paper level detector
(C2SPD, D1PQD, D2PQD)
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