MX-5500N, MX-6200N, MX-7000N (serv.man18). MX-FNX3 4 MX-RBX2 MXPNX2A-D SERVICE MANUAL-Disassembly Assembly-1 - Sharp Copying Equipment Peripheral (repair manual). Page 39

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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]
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