Sharp MX-5500N / MX-6200N / MX-7000N (serv.man11) Peripheral ▷ View online
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).
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)
front surface sensor is turned ON)
Lowering operation (when paper is supplied or when the lower
limit sensor is turned ON)
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.
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.
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
(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
feed complete
Paper feed start
Preliminary
paper feed start
Second sheet
Preliminary paper
feed complete
Paper feed start
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
feed complete
Paper feed start
Preliminary
paper feed start
Fourth sheet
Preliminary paper
feed complete
Paper feed start
feed complete
Paper feed start
Preliminary
paper feed start
Fifth sheet
Preliminary paper
feed complete
Paper feed start
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.
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
MX-LCX3 DISASSEMBLY AND ASSEMBLY 6 – 1
MX-LCX3
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 pickup roller and the paper
feed roller.
4) Loosen 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)
Remove the screw, and remove the left front cabinet.
3)
Open the upper cover, and remove the screws.
4)
Remove the upper cabinet.
MX-LCX3 DISASSEMBLY AND ASSEMBLY 6 – 2
5) Disconnect the connectors.
6) Remove the screws, and remove the paper feed unit.
6) Remove the screws, and remove the paper feed unit.
B. Paper feed tray
1) Pull out the tray.
2) Remove the upper cabinet. (Refer to "A. Paper feed unit")
3) Remove the left front cabinet. (Refer to "A. Paper feed unit")
4) Remove the harness.
2) Remove the upper cabinet. (Refer to "A. Paper feed unit")
3) Remove the left front cabinet. (Refer to "A. Paper feed unit")
4) Remove the harness.
5) Remove the screws from the left and right rail sections, and
remove the tray unit from the rail.
C. Lift drive unit
1)
Check that there is no paper, and lower the paper feed table to
the lower limit with the main unit simulation mode.
the lower limit with the main unit simulation mode.
2)
Remove the screws, and remove the rear cabinet.
3)
Remove the connectors.
4)
Remove the screws, and remove the lift drive unit.
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