Sharp MX-5500N / MX-6200N / MX-7000N (serv.man10) Peripheral ▷ View online
MX-LCX2 EXTERNAL VIEWS AND INTERNAL STRUCTURES 4 – 2
2. PWB, sensor, switch, heater
No.
Parts
MODEL
NOTE
Code
Signal name
Name
Type
Function/Operation
Active condition
7
MAIN PWB
-
LCC main
PWB
PWB
Controls and drives the LCC.
8
LDD
LDD
Lower limit
sensor
sensor
The lower limit of the tray is
detected.
detected.
When the tray is at the lower
limit, "H" level.
limit, "H" level.
9
LRE
LRE
Lift motor
encoder
encoder
The lift motor rotation is
detected.
detected.
Pulse signal
10
LCSW
LCSW
Cassette
detection
detection
The tray insertion is detected.
When inserted, "H" level.
11
LTOD
LTOD
The main unit
connection
sensor
connection
sensor
Detects connection to the main
unit.
unit.
When connected, "L" level.
12
LPFD
LPFD
Transport
sensor
sensor
Detects paper transport.
L level at paper remaining
detection.
detection.
13
LUD
LUD
Upper limit
sensor
sensor
Detects the paper upper limit
position.
position.
When "H" level (ON), the lift-up
motor stops.
motor stops.
14
LPED
LPED
Paper
presence/
empty sensor
presence/
empty sensor
Detects paper presence/empty
on the paper tray.
on the paper tray.
When paper is detected, "L".
* When lifting up, if "L" with
* When lifting up, if "L" with
LRE 800 pulse, the paper
feed solenoid is ON.
feed solenoid is ON.
15
LLSW
LLSW
Upper limit
switch
switch
Protects the paper feed unit
from breakage due to lifting the
tray too much.
from breakage due to lifting the
tray too much.
16
LDSW
LDSW
Upper open/
close switch
close switch
Detects open/close of the upper
door.
door.
17
DH
DH
Thermal
heater
heater
Keeps temperature in the LCC
tray.
tray.
Japan
only
only
7
8
9
10
11
14
13
15
16
17
12
MX-LCX2 OPERATIONAL DESCRIPTION 5 – 1
MX-LCX2
Service Manual
[5] OPERATIONAL DESCRIPTION
1. Lift operation
When the main unit is turned ON, if the tray is at the lower limit
position (lower limit sensor: LDD ON position), the lift motor is
turned ON to lift the tray.
When the paper presence/empty sensor (LPED) is turned ON
within 800 pulses of the encoder signal from start of lifting up the
tray, the lift motor is turned OFF to stop the tray, and the paper feed
solenoid is turned ON to move down the pickup roller. After that,
the lift motor is turned ON to lift the tray. The tray is stopped when
the upper limit sensor (LUD) is turned ON.
position (lower limit sensor: LDD ON position), the lift motor is
turned ON to lift the tray.
When the paper presence/empty sensor (LPED) is turned ON
within 800 pulses of the encoder signal from start of lifting up the
tray, the lift motor is turned OFF to stop the tray, and the paper feed
solenoid is turned ON to move down the pickup roller. After that,
the lift motor is turned ON to lift the tray. The tray is stopped when
the upper limit sensor (LUD) is turned ON.
If the paper presence/empty sensor (LPED) is not turned on within
800 pulses, the paper feed solenoid is turned ON with the lift motor
ON to move down the pickup roller. The lift motor is stopped at the
upper limit sensor (LUD) ON position, and the paper feed solenoid
is turned OFF.
When the machine power is turned on, if the tray is on the paper
feed position, lifting is not performed.
When the tray is pulled out, it moves down by its own weight.
800 pulses, the paper feed solenoid is turned ON with the lift motor
ON to move down the pickup roller. The lift motor is stopped at the
upper limit sensor (LUD) ON position, and the paper feed solenoid
is turned OFF.
When the machine power is turned on, if the tray is on the paper
feed position, lifting is not performed.
When the tray is pulled out, it moves down by its own weight.
Lifting up operation (When LPED is turned ON within 800 pulses of encoder.)
Lifting up operation (When LPED is not turned ON within 800 pulses of encoder.)
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.
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 (LRFM) 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.
motor (LRFM) 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.
LCC paper feed time chart
LLM
(Lift motor output)
LLD
(Lower limit sensor)
LUD
(Upper limit sensor)
LPED
(Paper empty detection)
LPFS
(Solenoid)
Within 800 pulses
200 msec
LRE
(Encoder signal)
LLM
(Lift motor output)
LLD
(Lower limit sensor)
LUD
(Upper limit sensor)
LPED
(Paper empty detection)
LPFS
(Solenoid)
LRE
(Encoder signal)
Within 800 pulses
LPFM
(Transport motor)
LPFD
(Transport sensor)
TRC
(Main unit
synchronous signal)
LTRC
(Transport clutch)
LPFC
(Paper feed clutch)
LPFS
(Paper feed solenoid)
Paper feed start
Clearance-between-
papers control timer
PIC drop timer
PIC drop timer
PIC drop timer
PIC drop timer
Clearance-between-
papers control timer
Clearance-between-
papers control timer
Clearance-between-
papers control timer
Resist stop
Resist stop
Resist stop
Resist stop
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Paper feed clutch
OFF timer
Preliminary
paper feed start
First sheet
Preliminary
paper feed start
Second sheet
Preliminary
paper feed start
Third sheet
Preliminary
paper feed start
Fourth sheet
Preliminary
paper feed start
Fifth sheet
Preliminary paper
feed complete
Paper feed start
Preliminary paper
feed complete
Paper feed start
Preliminary paper
feed complete
Paper feed start
Preliminary paper
feed complete
Preliminary paper
feed complete
MX-LCX2 OPERATIONAL DESCRIPTION 5 – 2
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.
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
3
4
5
1
2
6
7
MX-LCX2 DISASSEMBLY AND ASSEMBLY 6 – 1
MX-LCX2
Service Manual
[6] DISASSEMBLY AND
ASSEMBLY
1. Maintenance parts replacement
procedures
A. Paper feed roller
1) Pull the lever, and open the upper cover.
2) Remove the screw, and remove the sheet.
2) Remove the screw, and remove the sheet.
3) Remove the pawl, and remove the take-up roller and the paper
feed roller.
4) Remove the screw, and remove the paper guide block.
5) Remove the pawl, and remove the reverse roller.
5) Remove the pawl, and remove the reverse roller.
2. Each unit removal
A. Paper feed unit
1)
Pull out the tray.
2)
Open the upper cover, and remove three screws.
3)
Remove the upper cabinet.
4)
Disconnect the connectors (2 positions).
5)
Remove the screw, and remove the paper feed unit.
Click on the first or last page to see other MX-5500N / MX-6200N / MX-7000N (serv.man10) service manuals if exist.