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MX-FNX5  DETAILS  5 – 1

MX-FNX5

Service Manual

 

Depending on the finishing mode, the copies are directed up,
straight through, or down by the combinations of open and closed
junction gates.

Sequence 1
The first three sheets of each job feed to trays 

 

→ 

 

→ 

([A], [B], [C]), then the first three sheets feed together to the staple
tray [D].
Sequence 2
Thereafter, the remaining sheets feed to trays 

 

→ 

 ([E], [F]),

then the two sheets feed together to the staple tray [G]. Sequence
2 continues until the end of the job.
Junction gate mechanism:
• Three junction gates at the top of the pre-stack tray send the

sheet of paper down path 

, 

, or 

.

• The pre-stack junction gate motor controls the junction gates.
• The pre-stack junction gate HP sensor detects when the junction

gates are at home position.

• The pre stack paper sensor - left detects paper jams in path 

.

• The pre stack paper sensor - right detects paper jams in path

.

Stopper mechanism:
• The pre-stack stopper releases the three sheets of paper from

the pre-stack tray after the previous set is stapled.

• The pre-stack stopper motor controls the stopper at the bottom of

the tray.

• The pre-stack stopper HP sensor detects when the stopper is at

home position.

[A]

Upper tray junction gate 
motor

ON

Off

Off

[B]

Upper tray junction gate

OPEN

Closed

Closed

[C]

Stapler junction gate

Closed

Closed

OPEN

[D]

Stapler junction gate 
motor

Off

Off

ON

[A]

[B]

[B]

[C]

[C]

[D]

1

2

3

2

3

1

2

3

2

3

[A]

[B]

[C]

[D]

[E]

[F]

[G]

2

3

2

3

1

2

3

3

1

MX-FNX5  DETAILS  5 – 2

In the staple mode, as every sheet of paper arrives in the jogger
unit, it is vertically and horizontally aligned, then the staple edge is
pressed flat to ensure the edge of the stack is aligned correctly for
stapling.
Vertical Paper Alignment: About 60 ms after the trailing edge of
the copy passes the staple tray entrance sensor [A], the positioning
roller motor [B] is energized to push the positioning roller [C] into
contact with the paper. The positioning roller and alignment brush
roller [D] rotate to push the paper back and align the trailing edge of
the paper against the stack stopper [E].
Horizontal Paper Alignment: When the print key is pressed, the
jogger motor [F] turns on and the jogger fences [G] move to the
wait position about 7.2 mm wider than the selected paper size on
both sides. When the trailing edge of the paper passes the staple
tray entrance sensor, the jogger motor moves the jogger fences 3.7
mm towards the paper. Next, the jogger motor turns on again for
3.5 mm for the horizontal paper alignment then goes back to the
wait position.
Paper Stack Correction: After the paper is aligned in the stapler
tray, the left [H], center [I], and right [J] stack plate motors switch on
briefly and drive the front stack, center stack, and rear stack plates
against the edge of the stack to flatten the edge completely against
the staple tray for stapling. When the next copy paper turns on the
stapler entrance sensor, the stack plate motors turn on and return
to their home positions. The home positions are detected by stack
plate HP sensors (1), (2), (3).

Here is the operation sequence for jogging and stapling:

Side-to-Side
The stapler motor [A] moves the stapler [B] from side to side. After
the start key is pressed, the stapler moves from its home position to
the stapling position.
If two-staple-position mode is selected, for the first stack the stapler
moves to the rear stapling position first, staples, moves to the front
position, staples and waits at the front. For the second stack, the
stapler staples the front corner first, then moves to the rear corner
and staples.
NOTE: 
For continuous stapling jobs, the corners are stapled rear then front
for the odd number stacks and stapled front then rear for even
number stacks.
After the job is completed, the stapler returns to its home position.
This is detected by the stapler HP sensor [C].

[C]

[A]

[E]

[B]

[D]

[G]

[F]

[H]

[I]

[J]

(1)

(2)

(3)

(1)

The lower jogger fence lifts to receive the sheets.

(2)

The top fence moves down, to the horizontal position.

(3)

A sheet of paper goes into the stapler tray.

(4)

The positioning roller turns when each sheet is fed to the stapler 
tray.

(5)

Each sheet is fed down against the lower jogger fence to align the 
bottom edge.

(6)

After the set number of sheets come in, the top fence motor 
switches on and lowers the top fence against the top of the stack. 
This aligns the stack for stapling.

(7)

The bottom fence motor lowers the aligned stack to the stapling 
position.

(8)

The stapler staples the stack.

(2)

(5)

(3)

(4)

(1)

(6)

(7)

(8)

[A]

[B]

[C]

MX-FNX5  DETAILS  5 – 3

Rotation (1)
In the oblique staple position mode, the stapler rotation motor [A]
rotates the stapler unit [B] 45

° to counterclockwise after it moves to

the stapling position.
Rotation (2)
When the staple end condition arises, the stapler motor moves the
stapler to the front and the stapler rotation motor rotates the stapler
unit to clockwise to remove the staple cartridge [C]. This allows the
user to add new staples.
Once the staples have been installed, and the front door closed,
the stapler unit returns to its home position.
Sensors
Two sensors [D] and [E] detect the angle of the stapler. There are
three positions: horizontal, 45 degrees, 75 degrees.

When the stapler cartridge is locked and in position, actuator [A]
deactivates the cartridge set sensor [B] and the stapler is ready for
operation.
When aligned copies are brought to the stapling position by the
positioning roller and jogger fences, the staple hammer motor [C]
starts stapling.
During stapling, the stapler trims off the excess length of the sta-
ples. This length of the trimmings depends on the number of copies
in the set. They will be very small for a stack containing 100 sheets.
The staple trimmings drop into the trap door [D] inside the stapler.
When the stapler unit returns to its home position, solenoid {E}
energizes opens the trap door.
The staple trimmings drop into the staple trimmings hopper [F].
The staple trimmings hopper descends as it fills, until actuator [G]
activates the staple trimmings hopper full sensor [H]. A message
asks the user to empty the staple trimmings.

[A]

[B]

[D]

[E]

[C]

[A]

[B]

[C]

[D]

[E]

[F]

[G]

[H]

MX-FNX5  DETAILS  5 – 4

The stapler has a staple end sensor [A] and cartridge set sensor
[B]. When the staple cartridge is inserted, it pushes the actuator [C]
into the gap of the cartridge set sensor. This tells the machine the
stapler is ready for operation.
When a staple end or no cartridge condition is detected, a message
is displayed advising the operator to install a staple cartridge. If this
condition is detected during a copy job, the indication will appear,
and the copy job will stop.
The staple cartridge has a clinch area [D] where jammed staples
collect. The operator can remove the jammed staples from the
clinch area by raising and lowering bracket lever [E].

After the copies have been stapled, the stack feed-out motor [A]
starts.
The pawl [B] on the stack feed-out belt [C] transports the set of sta-
pled copies up and feeds it to the shift tray exit roller [D].
When stapling starts, the exit guide motor [E] opens the upper exit
guide [F], which includes the upper shift tray exit roller [G], in order
to feed out the leading edge of the copy set smoothly.
The exit guide motor turns on again at the prescribed time after sta-
pling finishes, and the upper exit guide plate is lowered. Then the
shift tray exit roller takes over the stack feed-out.
The on-off timing of the exit guide motor is detected by the exit
guide open sensor [H].
The stack-feed-out motor turns off when the pawl actuates the
stack feed-out belt home position sensor [I].

[C]

[A]

[B]

[D]

[E]

[B]

[C]

[D]

[G]

[I]

[A]

[E]

[F]

[H]