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MX-FNX4  DISASSEMBLY AND ASSEMBLY  6 – 39

3) Disconnect all the connectors [9] of the finisher controller PCB.
4) Remove the four screws [10] to remove the finisher controller

PCB base [11].

5) Release the pawl [13] of the clutch [12] on the back of the

delivery roller, and remove the clutch [12].

6) Remove the E-ring [14] and the bearing [15], and remove the

delivery roller.

7) Disconnect the connector [16], and remove the harness from

the clamp and the edge saddle [17].

8) Remove the two screws [18], and pull out the stapling tray [19]

in the delivery direction.

CAUTION: When removing parts in the stapling tray, do not apply a

force to the alignment metal plates (front/back) and the
three positions on the rear edge regulation plate.

l. Removal of swing unit
1)

Remove the screw [1], and pull out the swing pressurizing
guide [2] upward.

2)

Remove the two E-rings [3] at the junction of the swing unit
and the return roller unit, and slide the two collars [4] of the
return roller unit to the inside. 

3)

Remove the swing pressurizing rack [5] from the hook at the
center of the swing unit. 

4)

Remove the belt from the gear [6] at the back of the swing unit,
and pull out the swing unit [7] in the delivery direction.

CAUTION: When the gear [6] is removed, the parallel pin [8] falls.

Be careful not to lose it.

m. Removal of return roller unit
1)

Disconnect the connector [1] in front of the return roller unit,
and remove the harness from the clamp [2]

2)

Remove the two screws [3], and pull out the return roller unit
[4] toward you.

[10]

[11]

[9]

[10]

[13]

[14] [15]

[12]

[18]

[17]

[19]

[18]

[16]

[1]

[2]

[6][8]

[3][4]

[5]

[7]

[1]

[2]

[3]

[4]

MX-FNX4  DISASSEMBLY AND ASSEMBLY  6 – 39

3) Disconnect all the connectors [9] of the finisher controller PCB.
4) Remove the four screws [10] to remove the finisher controller

PCB base [11].

5) Release the pawl [13] of the clutch [12] on the back of the

delivery roller, and remove the clutch [12].

6) Remove the E-ring [14] and the bearing [15], and remove the

delivery roller.

7) Disconnect the connector [16], and remove the harness from

the clamp and the edge saddle [17].

8) Remove the two screws [18], and pull out the stapling tray [19]

in the delivery direction.

CAUTION: When removing parts in the stapling tray, do not apply a

force to the alignment metal plates (front/back) and the
three positions on the rear edge regulation plate.

l. Removal of swing unit
1)

Remove the screw [1], and pull out the swing pressurizing
guide [2] upward.

2)

Remove the two E-rings [3] at the junction of the swing unit
and the return roller unit, and slide the two collars [4] of the
return roller unit to the inside. 

3)

Remove the swing pressurizing rack [5] from the hook at the
center of the swing unit. 

4)

Remove the belt from the gear [6] at the back of the swing unit,
and pull out the swing unit [7] in the delivery direction.

CAUTION: When the gear [6] is removed, the parallel pin [8] falls.

Be careful not to lose it.

m. Removal of return roller unit
1)

Disconnect the connector [1] in front of the return roller unit,
and remove the harness from the clamp [2]

2)

Remove the two screws [3], and pull out the return roller unit
[4] toward you.

[10]

[11]

[9]

[10]

[13]

[14] [15]

[12]

[18]

[17]

[19]

[18]

[16]

[1]

[2]

[6][8]

[3][4]

[5]

[7]

[1]

[2]

[3]

[4]

MX-FNX4  DISASSEMBLY AND ASSEMBLY  6 – 39

3) Disconnect all the connectors [9] of the finisher controller PCB.
4) Remove the four screws [10] to remove the finisher controller

PCB base [11].

5) Release the pawl [13] of the clutch [12] on the back of the

delivery roller, and remove the clutch [12].

6) Remove the E-ring [14] and the bearing [15], and remove the

delivery roller.

7) Disconnect the connector [16], and remove the harness from

the clamp and the edge saddle [17].

8) Remove the two screws [18], and pull out the stapling tray [19]

in the delivery direction.

CAUTION: When removing parts in the stapling tray, do not apply a

force to the alignment metal plates (front/back) and the
three positions on the rear edge regulation plate.

l. Removal of swing unit
1)

Remove the screw [1], and pull out the swing pressurizing
guide [2] upward.

2)

Remove the two E-rings [3] at the junction of the swing unit
and the return roller unit, and slide the two collars [4] of the
return roller unit to the inside. 

3)

Remove the swing pressurizing rack [5] from the hook at the
center of the swing unit. 

4)

Remove the belt from the gear [6] at the back of the swing unit,
and pull out the swing unit [7] in the delivery direction.

CAUTION: When the gear [6] is removed, the parallel pin [8] falls.

Be careful not to lose it.

m. Removal of return roller unit
1)

Disconnect the connector [1] in front of the return roller unit,
and remove the harness from the clamp [2]

2)

Remove the two screws [3], and pull out the return roller unit
[4] toward you.

[10]

[11]

[9]

[10]

[13]

[14] [15]

[12]

[18]

[17]

[19]

[18]

[16]

[1]

[2]

[6][8]

[3][4]

[5]

[7]

[1]

[2]

[3]

[4]

MX-FNX4  DISASSEMBLY AND ASSEMBLY  6 – 39

3) Disconnect all the connectors [9] of the finisher controller PCB.
4) Remove the four screws [10] to remove the finisher controller

PCB base [11].

5) Release the pawl [13] of the clutch [12] on the back of the

delivery roller, and remove the clutch [12].

6) Remove the E-ring [14] and the bearing [15], and remove the

delivery roller.

7) Disconnect the connector [16], and remove the harness from

the clamp and the edge saddle [17].

8) Remove the two screws [18], and pull out the stapling tray [19]

in the delivery direction.

CAUTION: When removing parts in the stapling tray, do not apply a

force to the alignment metal plates (front/back) and the
three positions on the rear edge regulation plate.

l. Removal of swing unit
1)

Remove the screw [1], and pull out the swing pressurizing
guide [2] upward.

2)

Remove the two E-rings [3] at the junction of the swing unit
and the return roller unit, and slide the two collars [4] of the
return roller unit to the inside. 

3)

Remove the swing pressurizing rack [5] from the hook at the
center of the swing unit. 

4)

Remove the belt from the gear [6] at the back of the swing unit,
and pull out the swing unit [7] in the delivery direction.

CAUTION: When the gear [6] is removed, the parallel pin [8] falls.

Be careful not to lose it.

m. Removal of return roller unit
1)

Disconnect the connector [1] in front of the return roller unit,
and remove the harness from the clamp [2]

2)

Remove the two screws [3], and pull out the return roller unit
[4] toward you.

[10]

[11]

[9]

[10]

[13]

[14] [15]

[12]

[18]

[17]

[19]

[18]

[16]

[1]

[2]

[6][8]

[3][4]

[5]

[7]

[1]

[2]

[3]

[4]