DOWNLOAD Sharp MX-5500N / MX-6200N / MX-7000N (serv.man11) Service Manual ↓ Size: 3.59 MB | Pages: 34 in PDF or view online for FREE

Model
MX-5500N MX-6200N MX-7000N (serv.man11)
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34
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3.59 MB
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PDF
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Peripheral
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Device
Copying Equipment / MX-LCX3 SERVICE MANUAL COMPLETE
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mx-5500n-mx-6200n-mx-7000n-sm11.pdf
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Sharp MX-5500N / MX-6200N / MX-7000N (serv.man11) Peripheral ▷ View online

MX-LCX3  EXTERNAL VIEWS AND INTERNAL STRUCTURES  4 – 2
2. PWB, sensor, switch, heater
No.
Parts
Code
Signal name
Name
Type
Function/Operation
Active condition
1
LPUD
LPUD
LCC paper front surface 
sensor
Detects paper front surface position
CN-C 8pin
Paper detected: "L"
Paper not detected: "H"
2
LUD
LUD
Upper limit sensor
Detects the paper upper limit position.
CN-E 5pin
Upper limit: "H"
Other than Upper limit: "L"
3
LPFD
LPFD
Transport sensor
Detects paper transport.
CN-E 11pin
Paper detected: "L"
Paper not detected: "H"
4
LTOD
LTOD
The main unit connection 
sensor
Detects connection to the main unit.
CN-F 19pin
Connected: "L"
Not connected: "H"
5
LDSW
LDSW
Upper open/close switch
Detects open/close of the upper door.
CN-F 4pin 6pin
Open: "L"
Close: "24V"
6
LLSW
LLSW
Upper limit switch
Protects the paper feed unit from breakage 
due to lifting the tray too much.
CN-F 7pin
Normal: "24V"
Detection: "L"
7
LPED
LPED
Paper presence/empty 
sensor
Detects paper presence/empty on the paper 
tray.
CN-E 2pin
Paper present: "L"
Paper empty: "H"
8
A3-LCC PWB
A3-LCC PWB unit
Controls and drives the LCC.
9
LCSW
LCSW
Cassette detection switch
The tray insertion is detected.
CN-B 7pin
Cassette insertion: "24V"
Cassette puling out: "L"
10
LRE
LRE
Lift motor encoder
The lift motor rotation is detected.
CN-C 4pin
Pulse
11
LWRSW
LWRSW
LCC reverse-winding 
detection switch
Detects lift motor reverse-winding
CN-B 14pin
Normal: "24V"
Detection: "L"
12
LTLD
LTLD
Tray lock sensor
Detects the tray lock
CN-C 7pin
Lock: "H"
Release: "L"
13
LDD
LDD
Lower limit sensor
The lower limit of the tray is detected.
CN-C 3pin
Lower limit: "H"
Other than Lower limit: "L"
14
DOWN SW PWB
Lowering SW PWB unit
Shifts the tray to the paper supply position.
15
LTLLED
LTLLED
Tray LED
The tray state is displayed with LED. 
1
2
3
4
5
6
7
8
9
10
11
12
13
15
14
MX-LCX3  OPERATIONAL DESCRIPTION  5 – 1
MX-LCX3
Service Manual
 
[5] OPERATIONAL DESCRIPTION
1. Lift operation
A. Lifting by insertion of the tray
When insertion of the tray is detected, the tray is locked by the tray
lock solenoid so that the tray cannot be pulled out. 
When tray lock is settled by turning ON the tray lock sensor (LTLD),
the lift motor is turned ON to lift the tray. 
When the tray is lifted, the tray LED blinks and stops at the paper
feed position (upper limit) by turning ON the upper limit sensor
(LUD). 
When the tray stops at the paper feed position (upper limit), the tray
LED turns on.
When the paper empty sensor (LPED) turns ON within 1097 pulses
of the encoder signal from start of the tray lifting, the lift motor is
turned OFF to stop the tray, and the paper feed solenoid (LPFS) is
turned ON to lower the pick roller. 
After that, the lift motor is turned ON again to lift the tray and stop it
at the upper limit sensor (LUD) ON position. 
When the paper empty sensor (LPED) does not turn ON within
1097 pulses, the paper feed solenoid (LPFS) is turned ON with the
lift motor ON to lower the pick roller. The lift motor is stopped at the
upper limit sensor (LUD) ON position and the paper feed solenoid
is turned OFF.
Lifting (When LPED turns ON within 1097 pulses during lifting)
Lifting (When LPED does not turn ON within 1097 pulses dur-
ing lifting)
B. Lowering operation by paper empty detection 
or pressing the tray SW
When the paper empty sensor (LPED) turns OFF with the tray at
the paper feed position (upper limit) or when the tray SW (LTLSW)
is pressed, the tray is lowered by 542 pulses of the encoder signal
and stopped at the paper supply position. 
When the lower limit sensor (LDD) turns ON before lowering the
tray by 542 pulses of the encoder signal, the lift motor is turned
OFF to stop the tray. 
When the tray is moving down, the tray LED blinks. When the tray
is stopped at the paper supply position, the tray LED turns OFF.
When the tray is stopped at the paper supply position, the tray lock
solenoid releases the lock so that the tray can be pulled out.
When the tray is lowered with the paper empty sensor (LPED) OFF,
the tray remains at the paper supply position and the tray lock is
kept released. 
When the tray is lowered by pressing the tray SW (LTLSW), if the
tray is not pulled out from the paper supply position for 90sec, the
tray lock solenoid locks the tray. When the tray is locked securely,
the lift motor is turned ON to lift the tray. 
When the tray is lifting, the tray LED blinks. When the upper limit
sensor (LUD) is turned ON, the tray stops at the paper feed position
(upper limit). 
When the tray stop at the paper feed position (upper limit), the tray
LED turns ON.
Lowering operation (when paper empty is detected)
Lowering operation (when tray SW is pressed)
LLM
(Lift motor output)
LDD
(Lower limit sensor)
LUD
(Upper limit sensor)
LPED
(Paper empty detection)
LPSL
(Solenoid)
Within 1097 pulses
LRE
(Encoder signal)
200msec
LLM
(Lift motor output)
LDD
(Lower limit sensor)
LUD
(Upper limit sensor)
LPED
(Paper empty detection)
LPSL
(Solenoid)
LRE
(Encoder signal)
1097
LLM
(Lift motor output)
LDD
(Lower limit sensor)
LUD
(Upper limit sensor)
LPED
(Paper empty detection)
LTLSW
(Tray SW)
LRE
(Encoder signal)
542
LLM
(Lift motor output)
LDD
(Lower limit sensor)
LUD
(Upper limit sensor)
LPED
(Paper empty detection)
LTLSW
(Tray SW)
LRE
(Encoder signal)
Less than 542
MX-LCX3  OPERATIONAL DESCRIPTION  5 – 2
C. Lowering operation by paper supply
If the tray is pulled out when it is at the paper supply position, the
tray lock solenoid keep the lock released. 
When the tray is pulled out, the tray LED turns OFF. 
When the paper front surface sensor (LPUD) is turned ON for 2sec
while the tray is pulled out, the lift motor is turned ON to lower the
tray.
When the paper front surface sensor (LPUD) is turned OFF while
the tray is lowered, the lift motor is turned OFF to stop the tray. 
When the lower limit sensor (LDD) is turned ON while the tray is
lowered, the lift motor is turned OFF to stop the tray regardless of
the state of the paper front surface sensor (LPUD).
Lowering operation (when paper is supplied or when the paper
front surface sensor is turned ON)
Lowering operation (when paper is supplied or when the lower
limit sensor is turned ON)
2. Paper feed operation
When the tray is stationary at the paper feed position (upper limit
sensor: LUD ON position) and there is paper on the tray, paper
feed operation can be performed.
Paper feed operation is performed by the transport motor (LPFM),
the transport clutch (LTRC), the paper feed clutch (LPFC), and the
paper feed solenoid (LPFS) at the following timing.
When the transport clutch (LTRC) is turned ON with the transport
motor (LPFM) ON (rotating), the transport roller rotates. When the
paper feed clutch (LPFC) is turned on under this state, the paper
feed roller and the take-up roller rotate. When the paper feed sole-
noid (LPFS) is turned ON, the take-up roller is pushed down to
press paper.
Paper feed time chart
LLM
(Lift motor output)
LDD
(Lower limit sensor)
LPUD
(Paper front surface
sensor)
LRE
(Encoder signal)
2 [sec]
LLM
(Lift motor output)
LDD
(Lower limit sensor)
LPUD
(Paper front surface
sensor)
LRE
(Encoder signal)
2 [sec]
Resist stop
LPFM
(Transport motor)
LTD
(Transport sensor)
TRC-LCC
(Main unit
synchronous signal)
LTRC
(Transport clutch)
LPFC
(Paper feed clutch)
LPFS
(Paper feed solenoid)
Paper feed start
Clearance-between-
papers control timer
Clearance-between-
papers control timer
PIC drop timer
PIC drop timer
Resist stop
Resist stop
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Preliminary
paper feed start
First sheet
Preliminary paper
feed complete
Paper feed start
Preliminary
paper feed start
Second sheet
Preliminary paper
feed complete
Paper feed start
Clearance-between-
papers control timer
Clearance-between-
papers control timer
PIC drop timer
PIC drop timer
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Preliminary
paper feed start
Third sheet
Preliminary paper
feed complete
Paper feed start
Preliminary
paper feed start
Fourth sheet
Preliminary paper
feed complete
Paper feed start
Preliminary
paper feed start
Fifth sheet
Preliminary paper
feed complete
Paper feed start
Resist stop
MX-LCX3  OPERATIONAL DESCRIPTION  5 – 3
3. Paper empty detection
When the tray lifts and stops at the paper feed position and during
paper feed operation, paper presence/empty is detected by the
paper presence/empty sensor (LPED).
When paper empty is detected in the tray during paper feeding,
paper feeding is stopped.
1
Paper feed roller clutch
2
Take-up roller
3
Paper feed roller
4
Paper feed solenoid
5
Transport clutch
6
Transport motor
7
Lift-up motor
4
1
3
2
5
6
7
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