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MX-FNX8  REPLACEMENT AND ADJUSTMENT  3 – 1

MX-FNX8

Service Manual

 

1)

Open the left front door [A].

2)

Open the right front door [B].

Remove:
[C] Top cover (   x3)

• Slide the top cover toward the front of the finisher and lift it off.

[D] Front right door bracket (  x1) and remove the door.
[E] Front left door bracket (  x1) and remove the door.
[F] Rear left cover (  x2)
[G] Rear right cover (  x6)
[H] Output tray
[I] Bottom cover (  x4)
[J] Left cover (  x2)

[A] Open the front door.
[B] Pull out the stapling unit.
[C] Positioning roller (

  x1, timing belt x1)

• Disconnect the finisher if it is connected to the copier.
Finisher Entrance Sensor
[A] Sensor bracket (  x1)
[B] Finisher entrance sensor (

  x1)

Stack Tray Exit Sensor
[C] Sensor bracket (  x1,

 x1)

[D] Finisher entrance sensor

Remove:
[A] Sensor bracket (  x1)
[B] Finisher exit sensor (

 x1)

[A]

[B]

[C]

[D]

[E]

[F]

[G]

[H]

[I]

[J]

[A]

[C]

[B]

[A]

[B]

[C]

[D]

[A]

[B]

MX-FNX8  REPLACEMENT AND ADJUSTMENT  3 – 2

• Open the front door.
• Pull out the stapling tray.
[A] Fold unit vertical guide plate

[B] Fold unit inner cover (  x2, Pin x1)

[C] Fold unit upper cover (  x1)
[D] Paper clamp unit (  x4)
[E] Fold unit exit sensor bracket (  x1, 

 x1)

[F] Fold unit exit sensor

Important
• The fold unit is adjusted for optimum performance before the fin-

isher is shipped from the factory. Do this adjustment only if the
edges of folded booklets are not even.

1)

Turn on the main power switch. 

2)

Open the front door of the finisher, and pull out the center bind-
ing staple unit. 

3)

Open the open/close guide plate. 

4)

Loosen the adjustment screw, and tighten it to a stop position
only. 
* Stop tightening the screw when it stops. 

(Do not use excessive force.)

5)

Loosen the fixing screw. 

6)

Lift the adjustment screw slightly upward, and let is fall by its
own weight. 

7)

Set the center binding staple unit, and close the front door. 

8)

Set A3 paper (any paper other than black background) on the
DSPF. 

9)

Set the staple position to the center binding. 
(Do not select the image edit.)

10) Press the copy start button, and perform center binding of one

set only. 

11) Draw an arrow mark on the paper discharged to the center

binding tray. 

12) Align the folded sides as shown below, and fold paper so that

the arrow comes inside. 
* Shift the upper side toward you by 2mm so that the paper

edge can be seen. 

13) Fix the aligned folded sides, and measure the shift quantity of

the top paper from the bottom paper. 

[A]

[B]

[C]

[D]

[E]

[F]

Open/close guide plate

Center binding
staple unit

Fixing screw

Adjustment
screw

2 mm

Shift

quantity

MX-FNX8  REPLACEMENT AND ADJUSTMENT  3 – 3

* Right side in the figure is [+] side, and the left side [–].

14) Open the front door of the finisher, and pull out the center bind-

ing staple unit. 

15) Open the open/close guide plate. 
16) Turn the adjustment screw according to the measured shift

quantity in the ratio of 0.1mm/1 scale. If the shift quantity is [+],
turn it clockwise. If the shift quantity is [–], turn it counterclock-
wise. 

17) Lift the adjustment screw upward, and let it fall by its own

weight. 

18) Securely tighten the fixing screw which was loosened.

Important
• The fold unit is adjusted for optimum performance before the fin-

isher is shipped from the factory. Do this adjustment only if the
edges of folded booklets are not even.

1)

Set A3 paper (any paper other than black background) on the
DSPF. 

2)

Set the staple position to the center binding. 
(Do not select the image edit.)

3)

Press the copy start button, and perform center binding of one
set only. 

4)

Draw an arrow mark on the paper discharged to the center
binding tray. 

5)

Measure the shift quantity of the upper edge from  the lower
edge at the center of the rear edge as shown below.

6)

Turn on the main power switch.

7)

Press [SYSTEM SETTING] key on the operation panel and log
in as the administrator.
(Password: admin/default)

8)

Press [Administrator Adjustment] key and select [Option
Adjustment] on the administrator adjustment menu.

9)

 Select [Saddle Unit] from the option adjustment menu.

10) Adjust the center folding position. (Select the paper size mea-

sured in the procedure 5).

11) After execution of the adjustment, repeat the procedures of 1) -

5). If there is no problem, terminate the adjustment.
If any more adjustment is required, repeat the procedures of 6)
- 10).

Fixing screw

Adjustment screw

Open/close
guide plate

Center binding
staple unit

MX-FNX8  REPLACEMENT AND ADJUSTMENT  3 – 4

* If there is virtually no shift, this adjustment is not required. (Basi-

cally this adjustment is not performed in the market.)

When executing the horizontal resist adjustment, remove and shift
the screw which fixes the horizontal resist reference bracket and
turn the reference bracket 90 degrees. Then the whole connection
bracket can be slid horizontally.

* There is a marking of 2mm pitch in the fixing section on the left

upper side of the connection bracket. The bracket can be shifted
by max. 

±5mm.

a. When paper is on the front side:
Slide the connection bracket to the front side, and shift the center
binding unit to the front side.
b. When paper is on the back side:
Slide the connection bracket to the back side, and shift the center
binding unit to the back side.

Remove:
• Rear left cover (

1. DOORS, COVERS, OUTPUT TRAY)

• Rear right cover (

1. DOORS, COVERS, OUTPUT TRAY)

[A] Loosen the screw to release the belt tension.
[B] Motor bracket (  x2, 

 x1, Timing belt x1)

[C] Entrance motor (  x2)

Remove:
• Rear left cover (

1. DOORS, COVERS, OUTPUT TRAY)

• Rear right cover (

1. DOORS, COVERS, OUTPUT TRAY)

[A] Loosen the screw to release the belt tension.
[B] Motor bracket (  x2, 

 x1, Timing belt x1)

[C] Upper transport motor (  x2)

Main unit side

Integrated-type connection bracket

Slide

Normal position of the
horizontal resist reference bracket

Loosen the screw and shift

Rotate the bracket
90 degrees.

[B]

[A]

[C]

[B]

[A]

[C]