Sharp MX-LCX5 Service Manual ▷ View online
MX-LCX5 DETAILED DESCRIPTIONS 4 – 1
MX-LCX5
Service Manual
[4] DETAILED DESCRIPTIONS
1. Paper feed
A. Paper feed rollers
This LCT has three paper tray feed stations:
The 4th and 6th tray each hold 1,000 sheets of paper. The 5th tray
holds 2,000 sheets of paper. Total: 4,000 sheets.
Each tray contains four rollers:
[A] Pick-up roller
[B] Paper feed roller
[C] Separation roller
[D] Grip roller
The 4th and 6th tray each hold 1,000 sheets of paper. The 5th tray
holds 2,000 sheets of paper. Total: 4,000 sheets.
Each tray contains four rollers:
[A] Pick-up roller
[B] Paper feed roller
[C] Separation roller
[D] Grip roller
NOTE: The pick-up roller, paper feed roller, and separation roller
are a standard FRR paper feed system.
B. Paper feed motors
Two stepper motors control the paper feed drive:
[A] Paper feed motor
[B] Grip motor
The paper feed motor drives the pick-up roller [C] and the paper
feed roller [D].
The grip motor drives the grip roller [E] that feeds the paper out of
the tray, and the separation roller [F].
[A] Paper feed motor
[B] Grip motor
The paper feed motor drives the pick-up roller [C] and the paper
feed roller [D].
The grip motor drives the grip roller [E] that feeds the paper out of
the tray, and the separation roller [F].
C. Paper separation
When a paper feed station is not selected:
• Separation roller solenoid [A] is de-activated
• Separation roller [B] turns freely.
When the paper feed station is selected for a job:
• Paper feed motor [C] and grip motor [D] turn on.
When the feed motor [C] turns on, it drives the feed roller [E]. It also
drives the pick-up roller [F] because the pick-up roller is linked to
the feed roller by an idle gear.
When the separation solenoid [A] turns on, the separation roller [B]
contacts the paper feed roller [E] and turns with the feed roller,
unless more than one sheet of paper is fed. The three trays of the
LCT unit use the standard FRR mechanism.
When the paper feed motor turns on, the pick-up solenoid turns on
and the pick-up roller [F] lowers until it contacts the top sheet of the
paper stack and then sends it to the paper feed and separation roll-
ers.
When the paper feed sensor detects the leading edge of the paper,
the paper feed motor switches off, the pick-up roller lifts, and the
grip rollers [G] feed the paper out of the tray.
• Separation roller solenoid [A] is de-activated
• Separation roller [B] turns freely.
When the paper feed station is selected for a job:
• Paper feed motor [C] and grip motor [D] turn on.
When the feed motor [C] turns on, it drives the feed roller [E]. It also
drives the pick-up roller [F] because the pick-up roller is linked to
the feed roller by an idle gear.
When the separation solenoid [A] turns on, the separation roller [B]
contacts the paper feed roller [E] and turns with the feed roller,
unless more than one sheet of paper is fed. The three trays of the
LCT unit use the standard FRR mechanism.
When the paper feed motor turns on, the pick-up solenoid turns on
and the pick-up roller [F] lowers until it contacts the top sheet of the
paper stack and then sends it to the paper feed and separation roll-
ers.
When the paper feed sensor detects the leading edge of the paper,
the paper feed motor switches off, the pick-up roller lifts, and the
grip rollers [G] feed the paper out of the tray.
[A]
[B]
[C]
[D]
[A]
[B]
[C]
[D]
[E]
[F]
[C]
[D]
[A]
[B]
[E]
[F]
[G]
MX-LCX5 DETAILED DESCRIPTIONS 4 – 2
2. Paper detection/lift
A. Mechanism
Detection
When the tray set in the machine, the tray is detected by the drawer
connector on the back side of the tray.
Lift
When the machine detects that the paper tray is set in the machine:
• The tray lift motor [A] rotates forward
• Coupling gear [B] on the tray lift motor engages pin [C] of the lift
When the tray set in the machine, the tray is detected by the drawer
connector on the back side of the tray.
Lift
When the machine detects that the paper tray is set in the machine:
• The tray lift motor [A] rotates forward
• Coupling gear [B] on the tray lift motor engages pin [C] of the lift
drive shaft.
• The tray drive belts [D], connected to the tray bottom plate [E],
are driven by the tray lift motor via the lift drive shaft and tray lift
pulleys [F].
pulleys [F].
• When the lift motor rotates forward, the tray bottom plate [E]
rises. The tray rises until the top of the paper stack pushes up the
pick-up roller and the lift sensor in the feed unit is de-activated.
pick-up roller and the lift sensor in the feed unit is de-activated.
• When the actuator [G] on the rear end of the bottom plate acti-
vates the paper height sensors [H], the remaining paper capacity
is detected.
is detected.
When the tray is pulled out:
• Coupling gear [B] separates from pin [C] and the tray bottom
• Coupling gear [B] separates from pin [C] and the tray bottom
plate goes down.
• A damper [I] slows the descent of the bottom plate. For the B834,
all three trays have this damper.
B. Lift sensor
When the lift motor turns on, the pick-up solenoid [A] activates to
lower the pick-up roller [B]. When the top sheet of paper reaches
the proper paper feed level, the paper pushes up the pick-up roller
and the actuator [C] on the pick-up roller supporter [D] de-activates
the lift sensor [E] to stop the lift motor.
After several paper feeds, the paper level gradually lowers, then
the lift sensor is activated and the lift motor turns on again until the
lift sensor is de-activated again.
lower the pick-up roller [B]. When the top sheet of paper reaches
the proper paper feed level, the paper pushes up the pick-up roller
and the actuator [C] on the pick-up roller supporter [D] de-activates
the lift sensor [E] to stop the lift motor.
After several paper feeds, the paper level gradually lowers, then
the lift sensor is activated and the lift motor turns on again until the
lift sensor is de-activated again.
3. Paper size detection
1)
4th Paper Width Sensor 3
2)
4th Paper Width Sensor 2
3)
4th Paper Width Sensor 1
4)
4th Paper Length Sensor
The 4th, 5th, and 6th trays have three paper width sensors and one
paper length sensor. The illustration above shows how these sen-
sors are arranged in the 4th tray.
This table describes how the three width sensors and one length
sensor are used to determine the paper size in the 4th, 5th, and 6th
paper trays.
paper length sensor. The illustration above shows how these sen-
sors are arranged in the 4th tray.
This table describes how the three width sensors and one length
sensor are used to determine the paper size in the 4th, 5th, and 6th
paper trays.
YES: Detected automatically
NO: Not detected automatically. Requires size setting change with
the "Tray Paper Setting" key on the copier operation panel to detect
the desired paper size.
H: Sensor OFF
L: Sensor ON
NO: Not detected automatically. Requires size setting change with
the "Tray Paper Setting" key on the copier operation panel to detect
the desired paper size.
H: Sensor OFF
L: Sensor ON
[A]
[B]
[C]
[E]
[F]
[G]
[H]
[I]
[D]
[A]
[E]
[D]
[C]
[B]
Paper Size
Width Sensors
Length
Sensor
Sensor
Area
W1
W2
W3
L1
NA
EU
Large
Size
Size
12" x 18"
L
L
L
H
YES
YES
13" x 19"
NO
NO
320 x 450 mm
NO
NO
A3 SEF
297 x 420 mm
L
L
H
H
YES
YES
A4 LEF
297 x 210 mm
L
L
H
L
YES
YES
DLT SEF
11" x 17"
L
H
L
H
YES
YES
LT LEF
11" x 8 1/2"
L
H
L
L
YES
YES
B4 SEF
257 x 364 mm
L
H
H
H
YES
YES
B5 LEF
257 x 182 mm
L
H
H
L
YES
YES
A4 SEF
210 x 297 mm
H
L
L
H
NO
YES
LT SEF
8 1/2" x 11"
H
L
L
H
YES
NO
A5 LEF
210 x 148 mm
H
L
L
L
NO
YES
HLT LEF
8 1/2" x 5 1/2"
H
L
L
L
YES
NO
B5 SEF
182 x 257 mm
H
L
H
H
NO
NO
F SEF
8" x 13"
H
L
H
H
YES
YES
A5 SEF
148 x 210 mm
H
H
L
L
YES
YES
HLT SEF 5 1/2" x 8 1/2"
H
H
H
L
YES
YES
1
2
3
4
MX-LCX5 DETAILED DESCRIPTIONS 4 – 3
4. Remaining paper detection
[A] Paper Height Sensor Actuator
[B] 4th Paper Height Sensor 4
[C] 4th Paper Height Sensor 3
[D] 4th Paper Height Sensor 2
[E] 4th Paper Height Sensor 1 (Near End)
Each tray has four paper height sensors. The illustration above
shows the paper height sensors in the 4th tray. This arrangement is
duplicated in the 5th and 6th trays.
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
[A] are possible.
1)
[B] 4th Paper Height Sensor 4
[C] 4th Paper Height Sensor 3
[D] 4th Paper Height Sensor 2
[E] 4th Paper Height Sensor 1 (Near End)
Each tray has four paper height sensors. The illustration above
shows the paper height sensors in the 4th tray. This arrangement is
duplicated in the 5th and 6th trays.
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
[A] are possible.
1)
With the actuator [A] below paper height sensor 4 [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 4 [B] , the dis-
play indicates 70% of the paper supply remaining.
play indicates 70% of the paper supply remaining.
3)
When the actuator passes paper height sensor 3 [C], the dis-
play indicates 30% of the paper supply remaining.
play indicates 30% of the paper supply remaining.
4)
When the actuator passes paper height sensor 2 [D], the dis-
play indicates 10% of the paper supply remaining.
play indicates 10% 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.
that the tray is empty.
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]
[E]
[D]
[A]
[B]
MX-LCX5 OVERALL MECHANICAL INFORMATION 5 – 1
MX-LCX5
Service Manual
[5] OVERALL MECHANICAL
INFORMATION
1. Mechanical component layout
*1: Each feed unit has 1 paper feed motor that drives the pick-up
roller and paper feed roller, and 1 grip motor that drives the separa-
tion roller and grip roller.
roller and paper feed roller, and 1 grip motor that drives the separa-
tion roller and grip roller.
2. Drive layout
1
4th Paper Feed Unit*1
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
M13
M3
M1
M4
M2
M6
M10
M11
M9
M12
M7
M5
M8
Click on the first or last page to see other MX-LCX5 service manuals if exist.