Sharp MX-CSX1 / MX-CSX2 Service Manual ▷ View online
MX-CSX2 OPERATIONAL DESCRIPTIONS 4 – 5
C. Paper lifting operation
Set paper in the paper feed tray and insert the paper feed tray into
the machine. The lift plate lifts up.
Paper is lifted by the lift motor (DxLM).
When the paper feed tray 1 upper limit detector (DxULD) detects
the top of paper, the lift motor (DxLM) stops and the contact pres-
sure between paper on the top and the paper pickup roller
becomes the proper level when paper is picked up.
When the paper remaining quantity is decreased, the lift plate lifts
up in each case to maintain the contact pressure between paper on
the top and the paper pickup roller at the proper level when paper is
picked up.
the machine. The lift plate lifts up.
Paper is lifted by the lift motor (DxLM).
When the paper feed tray 1 upper limit detector (DxULD) detects
the top of paper, the lift motor (DxLM) stops and the contact pres-
sure between paper on the top and the paper pickup roller
becomes the proper level when paper is picked up.
When the paper remaining quantity is decreased, the lift plate lifts
up in each case to maintain the contact pressure between paper on
the top and the paper pickup roller at the proper level when paper is
picked up.
D. Paper feed operation
The paper feed motor (DPFC) is turned ON, and then the paper
feed clutch (DxPFC) is turned ON.
The power of the paper feed motor (DPFM) is transmitted through
the paper feed clutch (DxPFC) to the paper pickup roller and the
paper feed roller.
The paper pickup roller descends to pick up paper on the top and
feed it to the paper feed roller.
The paper feed roller feeds paper to the paper transport section.
At that time, the separation roller rotates to prevent double-feed.
feed clutch (DxPFC) is turned ON.
The power of the paper feed motor (DPFM) is transmitted through
the paper feed clutch (DxPFC) to the paper pickup roller and the
paper feed roller.
The paper pickup roller descends to pick up paper on the top and
feed it to the paper feed roller.
The paper feed roller feeds paper to the paper transport section.
At that time, the separation roller rotates to prevent double-feed.
E. Paper size detection operation
Detects the paper size by using combination of ON/OFF of three
switches and the concave and the convex sections of the paper
size detection block whose position is changed in connection with
the paper guide (longitudinal direction).
When the paper guide (longitudinal direction) position is changed,
the concave and convex sections of the paper size detection block
which are in contact with the paper size detection PWB detector
are changed by the paper size detection block drive gear.
switches and the concave and the convex sections of the paper
size detection block whose position is changed in connection with
the paper guide (longitudinal direction).
When the paper guide (longitudinal direction) position is changed,
the concave and convex sections of the paper size detection block
which are in contact with the paper size detection PWB detector
are changed by the paper size detection block drive gear.
Relationship between paper size detection and the paper size
detector (paper size detection PWB switch)
detector (paper size detection PWB switch)
Signal name
Name
Function and operation
D2ULD
Paper feed tray upper limit detector
(Paper feed tray 3)
(Paper feed tray 3)
Detects the upper limit position of the paper feed tray and maintains the contact pressure between
paper on the top and the paper pickup roller at a proper level to provide a stable paper feed power.
paper on the top and the paper pickup roller at a proper level to provide a stable paper feed power.
D2LM
Paper feed tray lift-up motor
(Paper feed tray 3)
(Paper feed tray 3)
Drives the lift plate of the paper feed tray, and maintains the contact pressure between paper on the
top and the paper pickup roller at a proper level to provide a stable paper feed power.
top and the paper pickup roller at a proper level to provide a stable paper feed power.
D2PED
Paper empty detector (Paper feed tray 3)
Detects paper empty in the paper feed tray.
D2PTC
Paper feed tray vertical transport clutch
(Paper feed tray 3)
(Paper feed tray 3)
Controls ON/OFF of the paper transport roller 1 in the paper feed tray section.
D2PFC
Paper feed clutch (Paper feed tray 3)
Controls ON/OFF of the rollers (the paper pickup roller, the paper feed roller, and the paper transport
roller 2) in the paper feed tray section.
roller 2) in the paper feed tray section.
D2PQD
Paper feed tray insertion detector /
Paper remaining quantity detector
(Paper feed tray 3)
Paper remaining quantity detector
(Paper feed tray 3)
Detects insertion of the paper feed tray, and detects the paper remaining quantity.
D2PPD
Paper feed tray paper transport detector
(Paper feed tray 3)
(Paper feed tray 3)
Detects paper feed tray paper pass through the transport roller 1, and detects a paper jam.
D2COCS
Paper feed tray open/close detector
(Paper feed tray 3)
(Paper feed tray 3)
Detects open/close of the right transport section of the paper feed tray.
No.
Name
Function and operation
1
Paper transport roller 2 (Paper feed tray 3)
Transports paper from the paper feed tray 4 to the transport roller of the paper feed tray.
2
Paper pickup roller (Paper feed tray 3)
Picks up paper on the top and feeds it to the paper feed roller.
3
Paper feed roller (Paper feed tray 3)
Feeds paper to the paper transport section.
4
Paper separation roller (Paper feed tray 3)
Separates paper to prevent double feed.
5
Paper transport roller 1 (Paper feed tray 3)
Transports paper from the paper feed tray section to the transport roller of the paper feed tray 2.
6
Paper size detection block (Paper feed tray 3)
The paper size is detected by the paper size detection PWB by utilizing that the positions of the
concave and the convex sections of the block which is in contact with the paper size detection PWB
are changed according to the paper length.
concave and the convex sections of the block which is in contact with the paper size detection PWB
are changed according to the paper length.
7
Paper guide (longitudinal direction)
(Paper feed tray 3)
(Paper feed tray 3)
When the position is changed according to the paper length, the positions of the concave and the
convex sections of the paper size detection block which is in contact with the paper size detection
PWB detector are changed by the paper size detection block drive gear.
convex sections of the paper size detection block which is in contact with the paper size detection
PWB detector are changed by the paper size detection block drive gear.
8
Paper size detection block drive gear
(Paper feed tray 3)
(Paper feed tray 3)
Transmits the paper guide position (longitudinal direction) to the paper size detection block position in
order to detect the paper size.
order to detect the paper size.
9
Paper guide (lateral direction) (Paper feed tray 3)
Prevents paper feed skew.
10
Lift plate (Paper feed tray 3)
Lifts up paper and maintain the contact pressure between paper on the top and the paper pickup
roller to provide a stable paper feed power.
roller to provide a stable paper feed power.
11
Paper size detection PWB (Paper feed tray 3)
Detects the paper size by utilizing the combination of the concave and the convex sections of the
paper size detection block whose position is changed in connection with the paper guide position
(longitudinal direction) and ON/OFF of the three switches.
paper size detection block whose position is changed in connection with the paper guide position
(longitudinal direction) and ON/OFF of the three switches.
12
Paper remaining quantity detection actuator
(Paper feed tray 3)
(Paper feed tray 3)
The lift plate position is changed according to the paper remaining quantity, and the paper remaining
detection actuator position is also changed. It is detected by the paper remaining quantity detector to
recognize the paper remaining quantity.
detection actuator position is also changed. It is detected by the paper remaining quantity detector to
recognize the paper remaining quantity.
13
Dry heater (Paper feed tray 3) (Option)
Dehumidifies the paper feed tray.
14
Paper feed tray interface PWB
Interfaces signals between the paper feed tray control PWB and the paper feed tray 3.
SW1
SW2
SW3
Metric series
Inch series
ON
–
8.5" x 14"
ON
B5
7.25" x 10.5"
ON
A4
–
ON
ON
A5
8.5" x 11"
ON
ON
FC (8.5" x 13")
–
ON
ON
–
8.5" x 11"
MX-CSX2 OPERATIONAL DESCRIPTIONS 4 – 6
F. Paper remaining quantity detection operation
There are four levels of the paper remaining quantity: 3 levels of
remaining quantity and paper empty.
Paper empty:
The paper tray 1 paper empty detector (DxPED) is turned ON.
When the paper remaining quantity is 2/3 - 3/3:
The paper remaining quantity detector (DxULD) is not turned ON
when paper on the paper feed tray is lifted up and the paper feed
tray upper limit detector (DxPED) detects paper on the top and lift-
ing is stopped.
When the paper remaining quantity is 2/3:
The paper remaining quantity detector (DxULD) is turned ON when
paper on the paper feed tray is lifted up and the paper feed tray
upper limit detector (DxPQD) detects paper on the top and lifting is
stopped.
When the paper remaining quantity is 1/3 or less:
The paper remaining quantity detector (DxPQD) is turned ON once,
and then turned OFF.
remaining quantity and paper empty.
Paper empty:
The paper tray 1 paper empty detector (DxPED) is turned ON.
When the paper remaining quantity is 2/3 - 3/3:
The paper remaining quantity detector (DxULD) is not turned ON
when paper on the paper feed tray is lifted up and the paper feed
tray upper limit detector (DxPED) detects paper on the top and lift-
ing is stopped.
When the paper remaining quantity is 2/3:
The paper remaining quantity detector (DxULD) is turned ON when
paper on the paper feed tray is lifted up and the paper feed tray
upper limit detector (DxPQD) detects paper on the top and lifting is
stopped.
When the paper remaining quantity is 1/3 or less:
The paper remaining quantity detector (DxPQD) is turned ON once,
and then turned OFF.
G. Paper feed tray section control
The option paper feed tray (the paper feed tray 2, 3, 4) are con-
trolled by the desk control PWB.
For load control, the desk control PWB outputs the control signal
according to the control data from the PCU PWB.
The sensor and detector signals are inputted to the desk control
PWB and sent to the PCU PWB.
trolled by the desk control PWB.
For load control, the desk control PWB outputs the control signal
according to the control data from the PCU PWB.
The sensor and detector signals are inputted to the desk control
PWB and sent to the PCU PWB.
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
Lift 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)
MX-CSX2 OPERATIONAL DESCRIPTIONS 4 – 7
4. Electrical section
A. Overall block diagram
AC
L
AC
N
DES
K
heater
interface
P
W
B
T
o
tray
3/
tray
4
100
V:
S
T
A
N
DA
R
D
EX100
/
EX
2
00
:O
P
T
ION
/DPF
M
-C
LK
/DPF
M
-E
N
DPF
M
-T
/D
TR
-DES
K
/R
XD-DES
K
R
ES-DES
K
/TR
C-DES
K
/DS
R
-DES
K
/T
XD-DES
K
+24V
+
5
V
M
ain
unit
O
utput
buffer
DPF
M
+24V
T
ransport
motor
DES
KM
AI
N
P
W
B
Sensor
input
circuit
CP
U
(H8/3684HV
)
T
ransistor
array
(T
D
62
00
3
AP)
D1P
T
C
D
3
P
T
C
D1PFC
D1P
R
ED1
D1P
R
ED
2
3
Xtal
(7.37MHz
)
O
nboard
w
riting
circuit
O
utput
buffer
Input
buffer
O
utput
buffer
Input
buffer
Input
buffer
Input
buffer
Safety
earth
D
2
P
T
C
D
2
PFC
L
ift
m
otor
drive
circuit
(2
SB1
24
0x
2
)
D1PED
+
5
V
T
ray
2
paper
rear
edge
detector
1
D
2
PED
+
5
V
D
3
PED
+
5
V
D1PPD
+
5
V
T
ray
2
si
z
e
detection
P
W
B
u
nit
D
3
P
T
C
T
ray
2
paper
transport
clutch
+24V
+24V
+24V
T
ray
3
paper
transport
clutch
T
ray
4
paper
transport
clutch
T
ray
2
paper
feed
clutch
T
ray
3
paper
feed
clutch
T
ray
4
paper
feed
clutch
L
ift
m
otor
drive
circuit
(2
SB1
24
0x
2
)
L
ift
m
otor
drive
circuit
(2
SB1
24
0x
2
)
D1
LM
D
2LM
D
3LM
T
ray
2
lift-up
motor
T
ray
3
lift-up
motor
T
ray
4
lift-up
motor
D1P
R
ED
3
T
ray
2
paper
rear
edge
detector
2
T
ray
2
paper
rear
edge
detector
3
T
ray
3
paper
rear
edge
detector
1
T
ray
3
si
z
e
detection
P
W
B
u
nit
D
2
P
R
ED1
D
2
P
R
ED
2
D
2
P
R
ED
3
D
2M
DC
T
ray
3
paper
rear
edge
detector
2
T
ray
3
paper
rear
edge
detector
3
T
ray
4
paper
rear
edge
detector
1
T
ray
4
si
z
e
detection
P
W
B
u
nit
D
3
P
R
ED
2
D
3
P
R
ED1
D
3
P
R
ED
3
D
3M
DC
T
ray
4
paper
rear
edge
detector
2
T
ray
4
paper
rear
edge
detector
3
T
ray
3
installation
detection
c
onnector
T
ray
4
installation
detection
c
onnector
GN
D
GN
D
D
2
PPD
+
5
V
D
3
PPD
+
5
V
D1
UL
D
+
5
V
D
2UL
D
+
5
V
D
3UL
D
+
5
V
D1P
Q
D
+
5
V
D
2
P
Q
D
+
5
V
D
3
P
Q
D
+
5
V
D1C
O
CS
+
5
V
D
2
C
O
CS
+
5
V
D
3
C
O
CS
+
5
V
T
ray
2
paper
e
mpty
detector
T
ray
3
paper
e
mpty
detector
T
ray
4
paper
e
mpty
detector
T
ray
2
paper
transport
d
etector
T
ray
3
paper
transport
d
etector
T
ray
4
paper
transport
detector
T
ray
2
upper
limit
detector
T
ray
3
upper
limit
detector
T
ray
4
upper
limit
detector
T
ray
2
paper
remaining
q
uantity
detector
T
ray
3
paper
remaining
q
uantity
detector
T
ray
4
paper
remaining
q
uantity
detector
T
ray
2
cover
open
/close
detector
T
ray
3
cover
open
/close
detector
T
ray
4
cover
open
/close
detector
+24V
+24V
+24V
MX-CSX2 MAINTENANCE 5 – 1
MX-CSX2
Service Manual
[5] MAINTENANCE
1. Maintenance system table
: Check : Clean
: Replace
: Adjust ✩: Lubricate
* For the MX-CSX1 and the MX-CSX2, the same roller is used.
No.
Part name
30K
60K
90K
120K
150K
180K
210K
240K
270K
300K
Remark
1
Paper pickup roller
Replace as needed.
Reference: About 100K
Reference: About 100K
2
Paper feed roller
3
Separation roller
1
2
3
1
3
2
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