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MX-FNX4  DISASSEMBLY AND ASSEMBLY  6 – 65

2) Hold the pawl of the two tie wraps with lock [1], and remove

them. (Remove without cutting the tie wraps.)

3) Disconnect the three connectors [2].
4) Remove harness [4] from the three harness holders [3].

5) Turn the gear [1] into the arrow direction, and move the punch

module [2] to the front side.

6) Remove the three screws [1] and the sensor base (upper) [2].
7) Then, disconnect the connector of the photo sensor PCB [3]

and the connector of the LED PCB [4], and remove the har-
ness from the edge saddle [5].

8)

Remove the harness [2] from the four harness holders [1].

9)

Disconnect the connector of the horizontal registration motor
[1] and the connector of the horizontal registration sensor [2],
and remove the punch module harness.

[2]

[1]

[2]

[3]

[3]

[1]

[3]

[4]

[1]

[2]

[2]

[1]

[1]

[3]

[1]

[1]

[2]

[1]

[2]

[1]

MX-FNX4  DISASSEMBLY AND ASSEMBLY  6 – 66

CAUTION: Displacement of punch module harness leads to mal-

functions. Correctly provide wiring as shown below.

1) Fix the punch module harness to the position that each of the

two tie wraps [1] of the punch module harness is at the outside
of the two clamps [2].

a. Removing rear cover
1) Remove the three screws [1] to remove the rear cover [2].

b. Removing right guide
1)

Remove the four screws [1] to remove the right guide [2].

c. Removing the upper cover
1)

Open the front door [1], and remove the three screws [2]. Pull
out the dial [3], and remove the upper cover [4].

d. Removing punch module
1)

Remove the E-ring [1], washer [2], and the punch spring [3].

[1]

[2]

[1]

[2]

FPE

FPHPD

FPNM

LED PCB

Photo sensor PCB

FPSHPD

FPSM

Punch

control

PCB

[1]

[2]

[1]

[2]

[2]

[1]

[4]

[3]

[4]

[2]

[3]

[1]

[2]

MX-FNX4  DISASSEMBLY AND ASSEMBLY  6 – 67

2) Turn the gear [1] in the arrow direction, and move the punch

module [2] to the front.

3) Remove the three screws [1] and the sensor base (upper) [2].

Then, disconnect the connector of the photo sensor PCB [3].

4) Disconnect the connector [1], and remove the screw [2]. Then,

remove the horizontal registration home position sensor [3].

5)

Turn the gear [1] into the arrow direction, and move the punch
module [2] to the back side.

6)

Hold the pawl of the tie wrap with lock [1], and remove it.
(Remove without cutting the tie wrap.)

7)

Disconnect the three connectors [2], and remove the screw [3].
Then, remove the harness guide [4].

8)

First, lift the front side of the punch model [1], and move it in
the arrow direction. Then, remove the punch module [1].

[1]

[2]

[2]

[1]

[1]

[3]

[2]

[1]

[3]

[1]

[2]

[2]

[1]

[2]

[4]

[3]

[1]

MX-FNX4  DISASSEMBLY AND ASSEMBLY  6 – 68

9) Disconnect the connector of the LED PCB [1].

10) Remove the slide shaft support [1] and sensor base (lower) [2].

CAUTION: The punch module that is set up as a service part is not

equipped with the slide shaft support [1]. When replac-
ing it, be sure to install the slide shaft support that has
been used in advance. Pay close attention to prevent
failure in installation of it causing malfunctions.

e. Removing LED PCB
1) Remove the screw [1] to remove the LED PCB [2].

a. Removing the outer cover
1) Remove the three screws [1] to remove the rear cover [2].

b. Removing the upper cover
1)

Open the front door [1], and remove the three screws [2]. Pull
out the dial [3], and remove the upper cover [4].

c. Removing photo sensor PCB
1)

Remove the screw [1].

2)

Disconnect the connector [2], and remove the photo sensor
PCB [3].

a. Removing right guide
1)

Remove the four screws [1] to remove the right guide [2].

[1]

[1]

[2]

[1]

[2]

[1]

[2]

[2]

[1]

[4]

[3]

[4]

[2]

[1]

[3]

[2]

[1]

[2]