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MX-LCX4  REPLACEMENT AND ADJUSTMENT  3 – 5

Normally the side registration of the image can be adjusted in the
SP mode.
If the punch hole positions are not aligned from a particular feed
station, however, you can manually adjust the side registration by
changing the tray cover position for that tray, and then adjust the
side registration of the image.
1)

Pull out the tray.

2)

Change the screw positions [A] at both the right and left sides
as shown.

NOTE: Adjustment range: 0 

± 2.0 mm adjustment step: 1.0 mm/

step

1)

Remove the lower-stage cassette (4 screws).

2)

Remove the rear cabinet. (5 screws)

Remove the earth plate. (2 screws)

[A]

Heater cover

Interface harness

(with heater line)

Heater

(x 2)

M4 screw (x 7)

M4 washer screw (x 1)

MX-LCX4  REPLACEMENT AND ADJUSTMENT  3 – 6

3)

Remove the interface harness plate (2 screws), and remove
the harness.

4)

Install a new interface harness, and insert the connector into
the PWB.
Fix the earth wire of the heater harness with the accessory
washer screw.

5)

Fix the two heaters with two screws for each of them, and fix
the harness with the snap band.

6)

Install the heater cover. (3 screws)

Install the rear cabinet and fix it with  the screw.

Screw (x 2)

Interface harness

Interface harness

Heater harness

section

Snap band fixing

Earth fixing screw

Snap band fixing

(3 positions)

MX-LCX4  DETAILED DESCRIPTIONS  4 – 1

MX-LCX4

Service Manual

 

This LCT has three paper tray feed stations:
The 4th and 5th tray each hold 1,000 sheets of paper. The 6th tray
holds 2,550 sheets of paper. Total: 4,550 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.

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].

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.

[A]

[B]

[C]

[D]

[A]

[B]

[C]

[D]

[E]

[F]

[C]

[D]

[A]

[B]

[E]

[F]

[G]

MX-LCX4  DETAILED DESCRIPTIONS  4 – 2

When a tray is set in the machine, the tray detection method used
depends on the tray:
• The upper tray and middle tray are detected when any one of the

paper size switch signals is low.

• The lower tray is detected when the switch 1 signal of the paper

size switch is low.

When the machine detects that the paper tray is set in the machine,
the tray lift motor [A] rotates and the coupling gear [B] on the tray lift
motor engages the pin [C] of the lift drive shaft [D]. The tray drive
belts [E] are connected to the tray bottom plate [F] and are driven
by the tray lift motor via the lift drive shaft [D] and tray drive pulleys
[G]. When the lift motor turns counterclockwise, the tray bottom
plate [F] moves up. The tray goes up until the top of the paper stack
pushes up the pick-up roller and the lift sensor in the feed unit is
de-activated.
When the actuator [H] on the rear end of the bottom plate activates
the paper height sensors [I], the remaining paper capacity is
detected. (see 4.)
When pulling out the tray, the coupling gear [B] separates from the
pin [C], so that the tray bottom plate moves downward. In the bot-
tom tray, the damper [J] lets the tray bottom plate drop slowly.

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.

For the top and middle trays, the paper size switch [A] detects the
paper size. The paper size switch contains three microswitches.
The paper size switch is actuated by an actuator plate [B] at the
rear of the tray. Each paper size has its own unique combination as
shown in the table and the CPU determines the paper size by the
combination.

The bottom tray has the same switch as the top and middle trays.
However, it is only used for detecting when the tray is pushed in.
For the bottom tray, the paper size must be selected in the SP5019-
007:

[F]

[A]

[E]

[J]

[D]

[E]

[C]

[B]

[G]

[H]

[I]

SW1

0

1

0

0

0

1

1

SW2

1

0

1

0

0

0

1

SW3

1

1

0

1

0

0

0

1: HI  0: LOW

[A]

[E]

[D]

[C]

[B]

[A]

[B]

2

1

3