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MX-FN12  DISASSEMBLY AND ASSEMBLY  6 – 3

Paper pass section, alignment section and staple section

Separation lever unit

6-4

U

Transport roller unit

6-6

U

Rear edge take-up roller

6-7

M

Staple cartridge

Replace at every 500K.

6-4

M

Front cabinet right

6-2

P

Paper pass unit

6-2

U

Rear cabinet

6-2

P

IF main PWB cover

6-2

P

Finisher upper paper guide

6-2

P

Paper pass detector

6-5

E

Staple unit

6-5

E

Paper transport motor unit

6-5

U

Paper transport motor

6-5

E

ST tray unit

6-7

U

ST tray

6-9

P

Paper rear edge detector C

6-9

E

Paper rear edge detector F

6-9

E

Paper rear edge detector R

6-9

E

Staple tray paper detector

6-9

E

Paper alignment plate home position detector F

6-8

E

Paper alignment plate home position detector R

6-8

E

Paper alignment motor F

6-8

E

Paper alignment motor R

6-8

E

Rear edge take-up roller solenoid

6-6

E

Paper pass gate solenoid

6-4

E

Stapler cooling fan

6-4

E

Safety switch

6-5

E

MX-FN12  DISASSEMBLY AND ASSEMBLY  6 – 4

1)

Open the front cover of the finisher.

2)

Turn the separation lever to the left to separate the finisher
from the machine. Slide the finisher to the left until it stops.

3)

Pull the lever of the staple case to remove the staple case.

NOTE: When installing the staple case, push it until it locks. 

4)

Remove the staple cartridge.

NOTE: When installing the staple cartridge, push it until it locks.

1)

Remove the screw, and remove the separation lever unit and
disconnect the connector. 

1)

Remove the harness from the wire saddle. Remove the screw
and remove the stapler cooling fan.

NOTE: When installing the fan, arrange so that the fan label faces

inside.

1)

Release the panel lock of the connector, and remove the har-
ness from the wire saddle. Remove the screw, and remove the
paper pass gate solenoid. 

NOTE: When installing the paper entry gate solenoid, shift it to the

switch side (in the arrow direction) and install.

MX-FN12  DISASSEMBLY AND ASSEMBLY  6 – 5

1)

Remove the switch, and remove the safety switch.

NOTE: When installing, be careful of the installing direction of the

safety switch. 

1)

Disconnect the connector, and remove the paper pass detec-
tor.

1)

Remove the cover. 

NOTE: When installing, hang the pawl of the cover, then install the

unit.

2)

Remove the screw from the bottom, and remove the staple
unit and disconnect the connector.

1)

Remove the screw, and remove the paper transport motor unit.
Disconnect the connector.

1)

Remove the screw, and remove the paper transport motor.

MX-FN12  DISASSEMBLY AND ASSEMBLY  6 – 6

1)

Remove the screw, and remove the rear edge take-up roller
solenoid unit. Disconnect the connector.

2)

Remove the harness from the wire saddle. Remove the screw,
and remove the rear edge take-up roller solenoid.

1)

Remove the E-ring, and remove the Mylar, the belt, and the
pulley. Remove the E-ring and the gear.

2)

Remove the screw, and remove the frame.

3)

Remove the E-ring of the shaft on the right side of the delivery
roller upper unit, and remove the bearing. Remove the E-ring
of the shaft on the left side, and slide the bearing.

4)

Slide the delivery roller upper unit to the front side, and pull it to
the rear side to remove. Remove the bearing of the shaft on
the left side.