Sharp MX-LC17 Service Manual ▷ View online
MX-LC17 N OPERATIONAL DESCRIPTIONS 4 – 1
MX-LC17 N
Service Manual
[4] OPERATIONAL DESCRIPTIONS
1. Electrical and mechanical main parts location
Signal
name
Name
Type
Function/operation
LCCD
Connect sensor
Transmission type
Detects connection to the main unit.
LCLSW
Right door close switch
Micro switch
Detects open/close of the right door.
LDD
Tray lower limit sensor
Transmission type
Detects lower limit of the tray.
LLM
Lift motor
Brush motor
Lifts the paper feed table.
LLSW
Upper limit switch
Micro switch
Detects upper limit of the tray.
LPED
Tray paper empty sensor
Reflection type
Detects paper presence/empty on the paper tray.
LPFC
Paper feed clutch
Electromagnetic clutch
Controls ON/OFF of the paper feed roller.
LPFD
Paper transport sensor
Reflection type
Detects paper transport.
LPFM
Paper feed motor
Brushless motor
Drives the paper feed, and the paper transport section.
LPFPD
Paper transport sensor 2
Reflection type
Detects paper transport
LPFS
Paper feed solenoid
Electromagnetic solenoid
Controls the paper pickup roller.
LPUD
Paper upper surface sensor
Transmission type
Detects paper surface position
LRE
Lift motor encoder sensor
Transmission type
Detects the lift motor rotation.
LTRC
Transport clutch
Electromagnetic clutch
Controls ON/OFF of the transport roller.
LUD
Tray upper limit sensor
Transmission type
Detects the paper upper limit position.
LWRSW
Reverse winding detection switch
Micro switch
Detects lift motor reverse winding
No.
Name
Function/operation
1
Paper pickup roller
Feeds paper to the paper feed roller.
2
Paper feed roller
Feeds paper to the paper transport section.
3
Transport roller (Drive)
Transports paper from the paper feed roller to the main unit.
4
Transport roller (Idle)
Applies a pressure to paper and the transport roller to provide a transport power of the transport roller to
paper.
paper.
5
Separation roller
Separates paper to prevent double feed.
LRE
LPFC
LPFS
LPFM
LLM
LTRC
LCLSW
LDD
LWRSW
LCCD
LPFD
LPFPD
LLSW
LPED
LUD
LPUD
1
2
5
4
3
MX-LC17 N OPERATIONAL DESCRIPTIONS 4 – 2
2. Lift Operation
A. Lifting tray after closing right door.
When right door is closed with the LCC connection being con-
nected, the lift motor is turned ON to lift the tray.
When tray upper limit sensor (LUD) is turned ON, the lift motor is
turned OFF to stop at feeding position.
nected, the lift motor is turned ON to lift the tray.
When tray upper limit sensor (LUD) is turned ON, the lift motor is
turned OFF to stop at feeding position.
B. Lowering tray after opening right door.
When right door is opened, the lift motor is turned ON to lower the
tray.When paper upper surface sensor (LPUD) is turned OFF, the
lift motor is turned OFF to stop at feeding position. If tray lower limit
sensor (LDD) is turned ON while lowering the tray to feeding posi-
tion, the lift motor is turned OFF to stop the tray.
tray.When paper upper surface sensor (LPUD) is turned OFF, the
lift motor is turned OFF to stop at feeding position. If tray lower limit
sensor (LDD) is turned ON while lowering the tray to feeding posi-
tion, the lift motor is turned OFF to stop the tray.
C. Lowering tray by loading paper.
When paper upper surface sensor (LPUD) is turned ON for certain
period of time while the tray is in the feeding position with right door
open, the lift motor is turned ON to lower the tray.
When the paper upper surface sensor (LPUD) is turned OFF while
the tray is lowering, the lift motor is turned OFF to stop the tray.
When the tray lower limit sensor (LDD) is turned ON while the tray
is lowering, the lift motor will be turned OFF to stop the tray regard-
less of the condition of the paper upper surface sensor (LPUD).
period of time while the tray is in the feeding position with right door
open, the lift motor is turned ON to lower the tray.
When the paper upper surface sensor (LPUD) is turned OFF while
the tray is lowering, the lift motor is turned OFF to stop the tray.
When the tray lower limit sensor (LDD) is turned ON while the tray
is lowering, the lift motor will be turned OFF to stop the tray regard-
less of the condition of the paper upper surface sensor (LPUD).
D. Suspension of lifting tray after opening the
right door.
When right door is opened while the tray is being lifted, the lift
motor is turned OFF to stop the operation and the operation
described in “B. Lowering operation after closing right door” will
start.
motor is turned OFF to stop the operation and the operation
described in “B. Lowering operation after closing right door” will
start.
E. Suspension of lowering tray after closing the
right door.
When right door is opening while the tray is being lowered, the lift
motor is turned OFF to stop the operation and the operation
described in “A. Lifting after closing right door” will start.
motor is turned OFF to stop the operation and the operation
described in “A. Lifting after closing right door” will start.
F. Suspension of lifting tray after disconnecting
LCC.
When LCC connection is disconnected while the tray is being lifted,
the lift motor is turned OFF to stop lifting the tray.
the lift motor is turned OFF to stop lifting the tray.
3. Paper Feed Operation
Paper feed operation can be performed if the tray is stationary at a
position where it can feed paper (with the upper limit sensor (LUD)
being ON) and there is paper in the tray.
position where it can feed paper (with the upper limit sensor (LUD)
being ON) and there is paper in the tray.
When paper feed takes place, the paper feed motor (LPFM), the
transport clutch (LTRC), the paper feed clutch (LPFC), and the
paper feed solenoid (LPFS) operate with the following timings:
transport clutch (LTRC), the paper feed clutch (LPFC), and the
paper feed solenoid (LPFS) operate with the following timings:
When the transport clutch (LTRC) turns ON with the paper feed
motor (LPFM) is ON (rotating), the transport roller starts rotating.
When the paper feed clutch (LPFC) turns ON in this state, the
paper feed and paper pick up rollers start rotating.
motor (LPFM) is ON (rotating), the transport roller starts rotating.
When the paper feed clutch (LPFC) turns ON in this state, the
paper feed and paper pick up rollers start rotating.
When the paper feed solenoid (LPFS) turns ON, the paper pick up
roller is pushed down to press paper.
roller is pushed down to press paper.
Paper feed time chart
4. Paper empty detection
The tray paper empty detector (LPED) 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.
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.
Paper feed operation is stopped if the sensor detects no paper in
the tray during paper feed operation.
the tray during paper feed operation.
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MX-LC17 N ELECTRICAL SECTION 5 – 1
MX-LC17 N
Service Manual
[5] ELECTRICAL SECTION
1. Block diagram
RXD-LCC
DSR-LCC
TXD-LCC
DTR-LCC
RES-LCC
L24VM
GND2
5V
24V
GND1
F.G.
3.3V
/TRC-LCC
AC-L
AC-N
+24V
+24V
+24V
5V
5V
+24V
+24V
Output buffer
12.2MHz
On-board write circuit
24
V monitoring
circuit
Paper feed motor （
LP
FM
）
Upper limit switch
（
LLS
W
）
Upper limit monitoring circuit
Lift motor drive circuit
Poly switch
1.1A
Current control circuit
Lift motor
（
LLM
）
Sensor input circuit
Tray lower limit sensor
（
LDD
）
Tray paper empty sensor
（
LP
E
D
）
Paper transport sensor
（
LP
FD
）
Connect sensor
（
LCCD
）
Lift motor encoder sensor
（
LRE
）
Paper feed clutch （
LP
FC
）
Transport clutch （
LTRC
）
Paper feed solenoid （
LP
FS
）
Clutch drive circuit
Main unit
LCC
MAI
N
PW
B
Tray upper limit sensor
（
LU
D
）
3.
3V circuit
24V
/LPFM_EN
/LPFM-CLK
LPFM-T(LD)
Fuse
Heater
Lift up circuit
Downward circuit
Reverse winding monitoring circuit
Paper upper surface sensor
(LP
U
D
)
CPU
LPCW
Right door close switch
（
LCLS
W
）
Right door monitoring circuit
Reverse winding detection switch
（
LW
RS
W
）
Fuse
Paper transport sensor2
(LP
FP
D
)
Output buffer
Input buffer
Output buffer
Input buffer
Input buffer
Input buffer
Input buffer
Solenoid drive circuit
Clutch drive circuit
MX-LC17 N ELECTRICAL SECTION 5 – 2
2. Actual wiring diagram
A
A
B
B
C
C
D
D
E
E
4
4
3
3
2
2
1
1
PS1
RXEF110
F1
0.5A
F3
NO
.ASSEMBL
Y(1A)
F2
1A
24V
24V
24V
24V
+
-
LLM1
LLM2
2
1
1
2
安全ｱｰｽ
ELP-02V
GND
LDD
LCCﾄﾚｲ下限検知ｾﾝｻ
/LDD
LCCﾘﾌﾄﾓｰﾀｰｴﾝｺｰﾀﾞｰｾﾝｻ
LRE
1
Sphinx DESK
AC-N(H)
2
ELP-04V
1
F.G.
ELR-04V
本体接続
4
SMP-11V
-NC
SMR-11V
-N
AC-L(H)
2
4
5
6
7
5
4
4
10
9
4
+24V(LCLSW
)
2
CN-B
1
9
12
9
1
+24V(LCLSW
)
GND
11
+5V
6
GND
1
/DTR-LCC
1
+24V
3
CN-A
ELR-02V
GND
4
9
7
6
77
6
3
4
10
11
3
292161-8
1
8
/TRC-LCC
8
LRE
+5VR
3
RES-LCC
5
+5V
RXD-LCC
2
GND
2
11
DF11-18DS-2C
8
51382-1200
5
8
6
8
5
ﾋｰﾀｰ(100V/10W
)
2
8
5
GND
+24V
179228-8
3
2
55932-1230
11
10
2
12
GND
7
LDD
6
/DSR-LCC
4
CN-E
TXD-LCC
3
GND
1
10
DF11-18DP-2DSA
7
LCLSW(24V
)
1
2
PS-187-2V
+24V(LDSW
)
LLM1
LLM2
+5VR
+24V(LCLSW
)
+24V(LLSW
)
GND
GND
+24V(PS1)
GND
+24V(PS1)
+24V(LDSW
)
GND
GND
+24V(LWRSW
)
GND
GND
12
13
14
15
13
12
16
17
18
14
15
17
16
18
SMR-03V
-N
3
3
2
1
2
1
+5V
GND
LRE
3
2
1
SMP-03V
-NC
LCLSW
給紙開閉ｽｲｯﾁ(NO)
LWRSW(24V
)
1
LWRSW
3
+24V(PS1)
PS-187-3V
逆巻検知ｽｲｯﾁ(NC)
+24V
GND
GND
+5V
/DTR-LCC
RES-LCC
RXD-LCC
/DSR-LCC
TXD-LCC
/TRC-LCC
GND
2
9
1
7
8
10
4
11
3
6
5
2
9
1
7
8
10
4
11
3
6
5
ﾋｰﾀｰ
LCCﾘﾌﾄﾓｰﾀｰ
LLM
LCC制御基板UN Phn
PHR-3
33
N.C.
ELR-03V
3
3
2
1
2
1
ELP-03V
+24V(LDSW
)
LCC本体中継ﾊｰﾈｽ Phn
LCCﾋｰﾀｰﾊｰﾈｽ Ph
LCCﾘﾌﾄﾊｰﾈｽ Phn
179228-3
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
179228-3
17
18
1
2
1
3
4
3
2
5
6
7
8
9
10
11
12
13
14
15
16
17
18
SMR-18V
-N
SMP-18V
-NC
LCC搬送ｾﾝｻ2
LCC搬送ｸﾗｯﾁ
/LPFC
+24V
LPFC
LCC給紙ｸﾗｯﾁ
2
1
/L
TRC
+24V
LTRC
2
1
CZHR-02V
-S
GND
/LPED
LPED
+5V
LCC給紙ｿﾚﾉｲﾄﾞ
LPFS
GND
LPFPD
+5V
LPFPD
給紙UN
LCCﾄﾚｲ用紙有無検知ｾﾝｻ
+24V_F2
3
10
1
7
DF11-26DP-2DSA
10
/L
TRC
7
/LPFS
2
9
1
6
3
9
CN-D
4
6
GND
+24V_F1
GND
8
2
5
/LPFC
8
4
5
/LPUD
GND
+5V
GND
/LPFD
11
12
13
14
15
16
17
18
13
11
12
14
15
16
17
18
DF11-26DS-2C
GND
GND
LPED
+5V
GND
20
19
20
19
21
22
23
24
25
26
21
22
23
24
25
26
+24V_F1
+5V
/LPCUD
GND
+5V
LUD
+5VR
+5VR
LPFPD
179228-3
1
3
2
179228-3
1
3
2
/LPUD
LPUD
+5VR
GND
SMR-03V
-N
3
2
3
1
2
1
SMP-03V
-NC
/LUD
LUD
+5VR
GND
紙面上面検知ｾﾝｻ給紙位置
LCC上限ﾘﾐｯﾄｽｲｯﾁ(NC)
LLSW(24V
)
1
LLSW
3
LDSW
PS-187-3V
LCCﾄﾚｲ上限検知ｾﾝｻ
179228-3
1
3
2
LCC搬送ｾﾝｻ
GND
1
3
+5V
2
/LPFD
LPFD
SMP-02V
-NC
SMR-02V
-N
2
1
1
2
5
4
9
8
7
4
9
GND
GND
8
2
6
DF11-14DS-2C
DF11-14DP-2DSA
7
+5V(+5VR)
/LPFM_EN
GND
2
1
6
LCCD
5
3
/LPCW(CW/CCW
)
1
3
GND
GND
10
10
11
12
13
14
11
12
13
14
LPFM-T
LPFM-CLK
GND
GND
+24V
CN-C
LCC本体接続検知ｾﾝｻ
+5V
/LCCD
179228-3
LCCD
GND
3
2
1
LCC搬送ﾓｰﾀ
LPFM-T
+24V
GND
/LPFM_EN
/LPFM-CLK
LPFM
179228-7
N.C.
/LPCW
5
4
2
3
1
6
7
LCCﾒｲﾝﾊｰﾈｽ Phn
LCC給紙ﾊｰﾈｽ Ph
LCC搬送ｾﾝｻ中継ﾊｰﾈｽ Ph
2
1
1
2
ﾋｰﾀｰ(120V/10W
)
1
ELP-04V
3
2
安全ｱｰｽ
2
1
ELR-04V
3
AC-N(H)
F.G.
AC-L(H)
ﾋｰﾀｰ
N.C.
44
ﾋｰﾀｰﾊｰﾈｽA4EX 100V Ph
ELP-02V
ELR-02V
※OPTIONAL
OPTIONAL(海外120系)
※OPTIONAL
OPTIONAL(海外200系)
ﾋｰﾀｰﾊｰﾈｽA4EX 200V Ph
ELP-02V(RED)
ELR-02V(RED)
2
1
1
2
ﾋｰﾀｰ(230V/10W
)
1
ELP-04V
3
2
安全ｱｰｽ
2
1
ELR-04V
3
AC-N(H)
F.G.
AC-L(H)
ﾋｰﾀｰ
N.C.
4
4
※OPTIONAL
※OPTIONAL
3
/RES_LCC_R
GND
CN-G
4
2
SWDCLK
DF11-10DP-2DSA
5
1
SWDIO
+3.3V1
6
7
9
8
10
+3.3V1
+3.3V1
GND
GND
GND
4
1
2
3
+5V
RxD_LOG
TxD_LOG
GND
CN-H
5045-04A
GND
6
8
2
5
7
3
4
1
9
10
11
12
13
14
15
16
/L
TLSL
GND
(+24V_F3)
CN-F
GND
LDSW2
/L
TLSW
+5VR
N.C.(+5VR)
GND
GND
/L
TLED
LCLSW2
+5VR
RESERVE_P2
GND
SMR-10V
-N
3
2
1
2
1
SMP-10V
-NC
3
6
5
4
5
4
6
9
8
7
8
7
9
10
10
駆動UN
LCC駆動ﾊｰﾈｽ Ph
SMP-02V
-NC
DF11-16DP-2DSA
端子
：
SPS-01T
-187
端子
：
SPS-01T
-187
端子
：
SPS-01T
-187
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