Sharp MX-LCX4 Service Manual ▷ View online
MX-LCX4 DETAILED DESCRIPTIONS 4 – 3
4. Remaining paper detectiion
The amount of paper remaining in the tray is detected by the three
paper height photo-interrupter sensors on the left rail as the bottom
plate rises. Five states, determined by the position of the actuator
are possible.
1)
paper height photo-interrupter sensors on the left rail as the bottom
plate rises. Five states, determined by the position of the actuator
are possible.
1)
With the actuator [A] below paper height sensor 1 [B], no sen-
sor is actuated and the display indicates 100%.
sor is actuated and the display indicates 100%.
2)
When the actuator passes paper height sensor 1 [B] , the dis-
play indicates 75% of the paper supply remaining.
play indicates 75% of the paper supply remaining.
3)
When the actuator passes paper height sensor 2 [C], the dis-
play indicates 50% of the paper supply remaining.
play indicates 50% of the paper supply remaining.
4)
When the actuator passes paper height sensor 3 [D], the dis-
play indicates 25% of the paper supply remaining.
play indicates 25% of the paper supply remaining.
NOTE: When the actuator enters the gap of the near end sensor
[E], the machine signals near end.
Finally, when the last sheet feeds, the paper end sensor signals
that the tray is empty. (see 5.)
that the tray is empty. (see 5.)
5. Paper end detection
The paper end sensor [A] detects the top sheet of the paper in the
tray by monitoring the reflected light. When the paper tray runs out
of paper, the paper end sensor does not receive the reflected light
due to the cutout [B]. Then, the tray lift motor rotates backwards 2
seconds to drop the tray bottom plate.
tray by monitoring the reflected light. When the paper tray runs out
of paper, the paper end sensor does not receive the reflected light
due to the cutout [B]. Then, the tray lift motor rotates backwards 2
seconds to drop the tray bottom plate.
[A]
[B]
[C]
[D]
[E]
[A]
[B]
MX-LCX4 OVERALL MECHANICAL INFORMATION 5 – 1
MX-LCX4
Service Manual
[5] OVERALL MECHANICAL
INFORMATION
1. Mechanical component layout
2. Drive layout
1
4th Paper Feed Unit
2
5th Paper Feed Unit
3
6th Paper Feed Unit
4
4th Tray Drive Belt
5
5th Tray Drive Belt
6
6th Tray Drive Belt
7
Lower Transport Rollers
8
Horizontal Transport Roller
9
LCT Exit roller
10
Upper Transport Rollers
11
Feed Slot (from Bypass Tray)
(1)
(2)
(3)
4
5
6
7
8
9
10
11
M1
4th Grip Motor
M2
4th Lift Motor
M3
4th Paper Feed Motor
M4
4th Transport Motor
M5
5th Grip Motor
M6
5th Lift Motor
M7
5th Paper Feed Motor
M8
5th Transport Motor
M9
6th Grip Motor
M10
6th Lift Motor
M11
6th Paper Feed Motor
M12
6th Transport Motor
M13
LCT Exit Motor
M8
M3
M1
M4
M2
M6
M10
M11
M9
M12
M7
M5
M13
MX-LCX4 OVERALL MECHANICAL INFORMATION 5 – 2
3. Electrical components
NOTE: Items S34, S35, S36, SOL5 and SOL6 are duplicated in
the 4th and 5th units.
S50
S33
S15 S17
S7
S12
S6
S5
S4
S24
S29
S23
S22
S21
S45
S40
S39
S38
S37
S49
SW1
SOL6
S35
S36
S34
SOL5
S4
4th Paper Height Sensor 1
S5
4th Paper Height Sensor 2
S6
4th Paper Height Sensor 3
S7
4th Paper Height Sensor 4
S12
4th Paper Size Sensors
S15
4th Relay Sensor
S17
4th Transport Sensor
S21
5th Paper Height Sensor 1
S22
5th Paper Height Sensor 2
S23
5th Paper Height Sensor 3
S24
5th Paper Height Sensor 4
S29
5th Paper Size Sensors
S33
5th Transport Sensor
S34
6th Lift Sensor
S35
6th Paper End Sensor
S36
6th Paper Feed Sensor
S37
6th Paper Height Sensor 1
S38
6th Paper Height Sensor 2
S39
6th Paper Height Sensor 3
S40
6th Paper Height Sensor 4
S45
6th Paper Size Sensors
S49
6th Transport Sensor
S50
Exit Sensor
SOL5
6th Pick-up Solenoid
SOL6
6th Separation Solenoid
SW1
Door Safety Switch
1
Main Control Board
2
Anti-Condensation Heaters (Options)
M1
4th Grip Motor
M2
4th Lift Motor
M3
4th Paper Feed Motor
M4
4th Transport Motor
M5
5th Grip Motor
M6
5th Lift Motor
M7
5th Paper Feed Motor
M8
5th Transport Motor
M9
6th Grip Motor
M10
6th Lift Motor
M11
6th Paper Feed Motor
M12
6th Transport Motor
M13
LCT Exit Motor
M8
M4
M1
M3
M5
M7
M2
1
M6
M11
M10
2 (Option:
0PQC4150431//)
M9
M12
M13
MX-LCX4 OVERALL MECHANICAL INFORMATION 5 – 3
4. A4/LT LCT MX-LCX4 layout
(with bypass)
5. Electrical component summary
M1
4th Grip Motor
M1
Paper Feed Motor Bypass (MX-MFX2)
M3
4th Paper Feed Motor
M3
Transport Motor Bypass (MX-MFX2)
M4
4th Transport Motor
M4
Grip Motor Bypass (MX-MFX2)
M5
5th Grip Motor
M7
5th Paper Feed Motor
M8
5th Transport Motor
M9
6th Grip Motor
M11
6th Paper Feed Motor
M12
6th Transport Motor
M13
LCT Exit Motor
S3
4th Paper Feed Sensor
S4
Paper Feed Sensor Bypass (MX-MFX2)
S8
Transport Sensor Bypass (MX-MFX2)
S15
4th Relay Sensor
S17
4th Transport Sensor
S20
5th Paper Feed Sensor
S33
5th Transport Sensor
S36
6th Paper Feed Sensor
S49
6th Transport Sensor
S50
LCT Exit Sensor
Motors
No.
(Signal)
Name
Description
M1
(L1REVM)
4th Grip Motor
Drives the separation roller and the grip
roller of the 4th tray.
roller of the 4th tray.
M2
(L1PRM)
4th Lift Motor
Drives the bottom plate of the 4th tray up
and down.
and down.
M3
(L1PUM)
4th Paper Feed
Motor
Motor
Drives the pick-roller and feed roller that
picks up each sheet and starts to feed it
out of the 4th tray.
picks up each sheet and starts to feed it
out of the 4th tray.
M4
(L1PFM)
4th Transport
Motor
Motor
Drives the rollers in the vertical feed path
that feed the paper from the 4th tray to the
LCT exit motor.
that feed the paper from the 4th tray to the
LCT exit motor.
M5
(L2REVM)
5th Grip Motor
Drives the separation roller and the grip
roller of the 5th tray.
roller of the 5th tray.
M6
(L2PRM)
5th Lift Motor
Drives the bottom plate of the 5th tray up
and down.
and down.
M7
(L2PUM)
5th Paper Feed
Motor
Motor
Drives the pick-roller and feed roller that
picks up each sheet and starts to feed it
out of the 5th tray.
picks up each sheet and starts to feed it
out of the 5th tray.
M8
(L2PFM)
5th Transport
Motor
Motor
Drives the transport rollers in the vertical
feed path that feed the paper from the 4th
tray and the 5th tray to the LCT exit motor.
feed path that feed the paper from the 4th
tray and the 5th tray to the LCT exit motor.
M9
(L3REVM)
6th Grip Motor
Drives the separation roller and the grip
roller of the 6th tray.
roller of the 6th tray.
Tray 4
Tray 5
Tray 6
Tray 7
(MX-MFX2)
M4
M7
S20
M8
S33
M11
S36
M1
S4
M4
S8
M3
M3
S3
M1
S17
M9
S49
M12
M13
S50
M5
S15
M10
(L3PRM)
6th Lift Motor
Drives the 5th tray up and down.
M11
(L3PUM)
6th Paper Feed
Motor
Motor
Drives the pick-roller and feed roller that
picks up each sheet and starts to feed it
out of the 6th tray.
picks up each sheet and starts to feed it
out of the 6th tray.
M12
(L3PFM)
6th Transport
Motor
Motor
Drives the rollers in the vertical feed path
that feed the paper from the 6th tray to the
LCT exit motor.
that feed the paper from the 6th tray to the
LCT exit motor.
M13
(PEM)
LCT Exit Motor
Feeds the paper out the LCT and into the
entrance of the copier.
entrance of the copier.
PCBs
No.
Name
Description
PCB1
Main Control
Board
Board
Controls the operation of all motors and
sensors in the LCT unit.
sensors in the LCT unit.
Sensors
No.
(Signal)
Name
Description
S1
(L1ULS)
4th Lift Sensor
Detects when the paper in the 4th tray is at
the correct height for paper feed and
switches the 4th lift motor off.
the correct height for paper feed and
switches the 4th lift motor off.
S2
(L1PES)
4th Paper End
Sensor
Sensor
Detects when the last sheet feeds from the
4th tray.
4th tray.
S3
(L1PFS)
4th Paper Feed
Sensor
Sensor
Detects the paper when it arrives at the 4th
paper feed roller and checks for misfeeds.
paper feed roller and checks for misfeeds.
S4
(L1PVS1)
4th Paper
Height Sensor 1
Height Sensor 1
4th from the bottom of the 4th tray, detects
stack height: 100%
stack height: 100%
S5
(L1PVS2)
4th Paper
Height Sensor 2
Height Sensor 2
5th from the bottom of the 4th tray, detects
stack height: 75%
stack height: 75%
S6
(L1PVS3)
4th Paper
Height Sensor 3
Height Sensor 3
6th from the bottom of the 4th tray, detects
stack height: 50%
stack height: 50%
S7
(L1PVS4)
4th Paper
Height Sensor 4
Height Sensor 4
4th from the bottom of the 4th tray, detects
stack height: 25% and signals near-end.
stack height: 25% and signals near-end.
S12
(L1SIZ1)
4th Paper Size
Sensor 1
Sensor 1
1 of a set of 3 sensors that detect the width
of the paper in the 4th tray.
of the paper in the 4th tray.
S13
(L1SIZ2)
4th Paper Size
Sensor 2
Sensor 2
1 of a set of 3 sensors that detect the width
of the paper in the 4th tray.
of the paper in the 4th tray.
S14
(L1SIZ3)
4th Paper Size
Sensor 3
Sensor 3
1 of a set of 3 sensors that detect the width
of the paper in the 4th tray.
of the paper in the 4th tray.
S15
(L1IDS)
4th Relay
Sensor
Sensor
Detects the leading and trailing edges of
the paper in the paper path near the
bottom of the 4th tray. Checks the timing of
the feed and signals a jam if the paper is
late or lags at this location.
the paper in the paper path near the
bottom of the 4th tray. Checks the timing of
the feed and signals a jam if the paper is
late or lags at this location.
S17
(L1TS)
4th Transport
Sensor
Sensor
Detects jams in the paper path where the
transport motor feeds the paper from the
4th tray.
transport motor feeds the paper from the
4th tray.
S18
(L2ULS)
5th Lift Sensor
Detects when the paper in the 5th tray is at
the correct height for paper feed and
switches the 4th lift motor off.
the correct height for paper feed and
switches the 4th lift motor off.
S19
(L2PES)
5th Paper End
Sensor
Sensor
Detects when the last sheet feeds from the
5th tray.
5th tray.
S20
(L2PFS)
5th Paper Feed
Sensor
Sensor
Detects the paper when it arrives at the 5th
paper feed roller and checks for misfeeds.
paper feed roller and checks for misfeeds.
S21
(L2PVS1)
5th Paper
Height Sensor 1
Height Sensor 1
4th from the bottom of the 5th tray, detects
stack height: 100%
stack height: 100%
S22
(L2PVS2)
5th Paper
Height Sensor 2
Height Sensor 2
5th from the bottom of the 5th tray, detects
stack height: 75%
stack height: 75%
S23
(L2PVS3)
5th Paper
Height Sensor 3
Height Sensor 3
6th from the bottom of the 5th tray, detects
stack height: 50%
stack height: 50%
S24
(L2PVS4)
5th Paper
Height Sensor 4
Height Sensor 4
4th from the bottom of the 5th tray, detects
stack height: 25% and signals near-end.
stack height: 25% and signals near-end.
S29
(L2SIZ1)
5th Paper Size
Sensor 1
Sensor 1
1 of a set of 3 sensors that detect the width
of the paper in the 5th tray.
of the paper in the 5th tray.
S30
(L2SIZ2)
5th Paper Size
Sensor 2
Sensor 2
1 of a set of 3 sensors that detect the width
of the paper in the 5th tray.
of the paper in the 5th tray.
S31
(L2SIZ3)
5th Paper Size
Sensor 3
Sensor 3
1 of a set of 3 sensors that detect the width
of the paper in the 5th tray.
of the paper in the 5th tray.
S33
(L2TS)
5th Transport
Sensor
Sensor
Detects jams in the paper path where the
transport motor feeds the paper from the
5th tray.
transport motor feeds the paper from the
5th tray.
Motors
No.
(Signal)
Name
Description
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