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MX-DE27 N OPERATIONAL DESCRIPTIONS 4 – 3
B. Paper feed tray 3/Paper feed tray 4
D1PRED1
D1MDC
D2MDC
D1PRED3
D1PRED2
D1PRED4
D1PRED4
D2PRED1
D2PRED3
D2PRED3
D2PRED2
D2PRED4
D2PRED4
D1PQD
D2PQD
D1LUD
D1PED
D2LUD
D2PED
D1PPD
D2PPD
1
2
3
4
5
6
6
7
8
9
10
11 13
13
12
DPFM
DPTRC
D1LM
D2LM
D1PFC
D2PFC
MX-DE27 N OPERATIONAL DESCRIPTIONS 4 – 4
Signal
name
Name
Function/operation
D1LM
Paper feed tray 3 lift-up motor
This motor lifts up the tray in paper feed tray.
D1LUD
Paper feed tray 3 upper limit
detector
detector
This detector detects when the tray in paper feed tray reaches its upper limit.
D1MDC
Paper feed tray 3 mount detect
connector
connector
This detector detects when paper feed tray is attached.
D1PED
Paper feed tray 3 paper empty
detector
detector
This detector detects when there is paper in paper feed tray.
D1PFC
Paper feed tray 3 paper feed clutch
This clutch controls the ON/OFF status of the paper feed roller (paper feed tray 3).
D1PPD
Paper feed tray 3 paper pass
detector
detector
This detector detects when paper is in the transport path for paper feed tray.
D1PQD
Paper feed tray 3 paper quantity
detector
detector
This detector detects the amount of paper remaining in paper feed tray.
D1PRED1
Paper feed tray 3 paper rear edge
detector 1
detector 1
The paper feeder recognizes that the tray for paper feed tray has been inserted when any of paper feed tray
paper rear edge detector 1 to 4 turns ON.
This detector detects the paper size of the tray in paper feed tray.
paper rear edge detector 1 to 4 turns ON.
This detector detects the paper size of the tray in paper feed tray.
D1PRED2
Paper feed tray 3 paper rear edge
detector 2
detector 2
D1PRED3
Paper feed tray 3 paper rear edge
detector 3
detector 3
D1PRED4
Paper feed tray 3 paper rear edge
detector 4
detector 4
D2LM
Paper feed tray 4 lift-up motor
This motor lifts up the tray in paper feed tray.
D2LUD
Paper feed tray 4 upper limit
detector
detector
This detector detects when the tray in paper feed tray reaches its upper limit.
D2MDC
Paper feed tray 4 mount detect
connector
connector
This detector detects when paper feed tray is attached.
D2PED
Paper feed tray 4 paper empty
detector
detector
This detector detects when there is paper in paper feed tray.
D2PFC
Paper feed tray 4 paper feed clutch
This clutch controls the ON/OFF status of the paper feed roller (paper feed tray 4).
D2PPD
Paper feed tray 4 paper pass
detector
detector
This detector detects when paper is in the transport path for paper feed tray.
D2PQD
Paper feed tray 4 paper quantity
detector
detector
This detector detects the amount of paper remaining in paper feed tray.
D2PRED1
Paper feed tray 4 paper rear edge
detector 1
detector 1
The paper feeder recognizes that the tray for paper feed tray has been inserted when any of paper feed tray
paper rear edge detector 1 to 4 turns ON.
This detector detects the paper size of the tray in paper feed tray.
paper rear edge detector 1 to 4 turns ON.
This detector detects the paper size of the tray in paper feed tray.
D2PRED2
Paper feed tray 4 paper rear edge
detector 2
detector 2
D2PRED3
Paper feed tray 4 paper rear edge
detector 3
detector 3
D2PRED4
Paper feed tray 4 paper rear edge
detector 4
detector 4
DPFM
Desk paper feed motor
This motor drives the paper feed and transport sections.
DPTRC
Desk paper transport clutch
This clutch controls the ON/OFF status of the transport roller 3, vertical transport roller 1, transport roller 5
and vertical transport roller 2.
and vertical transport roller 2.
No.
Name
Function/operation
1
Paper pickup roller (Paper feed tray 3)
Feeds paper to the paper feed roller.
2
Paper feed roller (Paper feed tray 3)
Feeds paper to the paper transport section.
3
Separation roller (Paper feed tray 3)
Separates paper to prevent double feed.
4
Transport roller 3 (Drive)
Transports paper from the paper feed roller to the transport roller 4.
5
Transport roller 3 (Idle)
Applies a pressure to paper and the transport roller to provide a transport power of the transport roller to
paper.
paper.
6
Transport roller 4
Transports paper from the transport roller 3 to the vertical transport roller 1.
7
Vertical transport roller 2 (Drive)
Transports paper from the transport roller 6 to the vertical transport roller 1.
8
Paper pickup roller (Paper feed tray 4)
Feeds paper to the paper feed roller.
9
Paper feed roller (Paper feed tray 4)
Feeds paper to the paper transport section.
10
Separation roller (Paper feed tray 4)
Separates paper to prevent double feed.
11
Transport roller 5 (Drive)
Transports paper from the paper feed roller to the transport roller 6.
12
Transport roller 5 (Idle)
Applies a pressure to paper and the transport roller to provide a transport power of the transport roller to
paper.
paper.
13
Transport roller 6
Transports paper from the transport roller 5 to the vertical transport roller 2.
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)
MX-DE27 N ELECTRICAL SECTION 5 – 1
MX-DE27 N
Service Manual
[5] ELECTRICAL SECTION
1. Block diagram
A
A
B
B
C
C
D
D
E
E
4
4
3
3
2
2
1
1
C A N
C A L
L
C A L C A
N
C A N C A
/ R
x C
L _
D C
/ x T C
L _
D C
/ C
L _
R S
D C
/ T C
L _
C
R C
/ D
T C
L _
R C
C L
_ S
E
R C
+ 4 2 V
+ 5
V
+ 5
V
+ 4 2 V
1 /
2
C2SS3
C2SS4
C2SS2
C2SSSET_D
C2SS1
C2PFC
㼂㻌
㻠㻌
㻞㻌
㻗㻌
C2PUC
㼂㻌
㻠㻌
㻞㻌
㻗㻌
C2LUM
㼂㻌
㻠㻌
㻞㻌
㻗㻌
2CS size detection PWB UN
㻰㻌
㻺㻌
㻳㻌
C2SPD
㼂㻌
㻡㻌
㻗㻌
㼂㻌
㻡㻌
㻗㻌
DSW_C2
㼂㻌
㻡㻌
㻗㻌
C2PFD
㼂㻌
㻡㻌
㻗㻌
C2PED
㼂㻌
㻡㻌
㻗㻌
C2LUD
㻟㻌
WH-CS2 Dehumidifying heater (Upper)
Paper feed tray 2 transport clutch
Paper feed tray 2 paper feed clutch
Paper feed tray 2 lift-up motor
Paper feed tray 2 paper level detector
Paper feed tray 2 attachment detection detector
Paper feed tray 2 paper rear edge detector 1
Paper feed tray 2 paper rear edge detector 2
Paper feed tray 2 paper rear edge detector 3
Paper feed tray 2 paper rear edge detector 4
Paper feed tray 2 open/close detection detector
Paper feed tray 2 paper transport detector
Paper feed tray 2 paper empty detector
Paper feed tray 2 upper limit detector
Main unit
㻯㻌
㻯㻌
㻸㻌
㻞㻌
Saf
ety g
rounding
Saf
ety g
rounding
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