DOWNLOAD Sharp MX-FN24 / MX-FN25 (serv.man2) Service Manual ↓ Size: 3.31 MB | Pages: 36 in PDF or view online for FREE

MX-FN25  REPLACEMENT AND ADJUSTMENT  4 – 4

Since the punch unit is adjusted in the factory before shipping,
there is no need to adjust it in the market. To replace the punch
section, replace the whole punch unit. 

1)

Remove the rear cover.

2)

Remove the horizontal resist sensor unit. 
(2 connectors, 2 screws)

3)

Remove the punch unit slide motor bracket. 
(1 connector, 2 screws)

4)

Pull and remove the punch unit. (2 connectors)

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

(Basically no need to perform this adjustment in the market.)

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 retighten to stop position. 
* Stop tightening the screw when it stops. 

(Do not use an 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.)

Point: 
Since the punch unit is adjusted precisely before shipping from the factory, 
do not disassemble it. 
When removing or replacing the unit, do not drop or traumatize the unit as 
it may go out of adjustment.

Horizontal resist sensor

Punch unit slide

Punch unit

Open/close guide plate

Center binding
staple unit

Fixing screw

Adjustment
screw

MX-FN25  REPLACEMENT AND ADJUSTMENT  4 – 5

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. 

* 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.

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

(Basically no need to perform this adjustment in the market.)

1)

Set A3 paper (any paper other than black background) to 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. 

* The right side on the figure is [–], and the left side is [+].

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.

2 m

m

Shift

quantity

Fixing screw

Adjustment screw

Open/close
guide plate

Center binding
staple unit

MX-FN25  REPLACEMENT AND ADJUSTMENT  4 – 6

9)

Select [Finisher] 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). 

1)

Remove the rear cover, and disconnect the connector of the
center binding staple unit. 
(Connector 6 positions, earth wire 1 position)

2)

Open the front door, and pull out the center binding staple unit. 

3)

Lift and remove the center binding staple unit from the finisher.
(4 screws)

4)

Hold the unit and remove the center folding unit. (Connector 6
positions, 4 screws)

5)

Install a new center folding unit. 
(Connector 6 positions, 4 screws)

Connector

Center folding unit

MX-FN25  REPLACEMENT AND ADJUSTMENT  4 – 7

6)

Fit the rank seal on the back of the new folding unit, and set
the DIP switch of the main PWB again.

<Center folding stapler replacement and adjustment 
(MX-FNX7/FN25 only)>
* If there is a horizontal shift or a vertical shift in center folding,

perform the center folding shift adjustment in advance.

7)

Remove the guide plate.

8)

Remove the stay. (4 screws)

9)

Remove the plate. (4 screws)

10) Remove the cover (2 screws)

11) Remove the bracket. (Connector 2 positions, 4 screws)
12) Remove the stapler: upper from the bracket. 

(4 screws for each)

13) Remove the stapler: lower. 

(Connector 1 position for each, 2 screws)
Replacement and adjustment

14) Install a new stapler: upper to the bracket (4 screws for each),

and set the jig included in the package to the back side. 

15) Install the bracket. (Connector 2 positions, 4 screws)
16) Install the new stapler: lower, and fix it temporarily. 

(Connector 1 position for each, 4 screws)

17) Turn the staple motor gear with fingers to extend the stapler

hammer to the maximum.

18) With the staple hammer stored in the jig hole and the stapler:

upper pushed in, tighten two fixing screws of the stapler: lower.

Main PWB DIP switch

Rank seal on the back
of the folding unit

Guide plate

Stay

Plate

Cover

Cover