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MX-FNX2 (serv.man7)
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17
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644.98 KB
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Service Manual
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Device
Copying Equipment / Section 5 - Operational Descriptions .
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mx-fnx2-sm7.pdf
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Sharp MX-FNX2 (serv.man7) Service Manual ▷ View online

MX-FNX2/AR-PN1/MX-RBX1  OPERATIONAL DESCRIPTION  5 – 7
Job offset sequence
3. Stapling Operation
A. Outline
Staple operation is performed to staple a specified sheets of paper
using a stapler unit.
The stapling position depends on the staple mode and paper size.
When the machine starts immediately after power-on, the finisher
controller PCB drives the staple shift motor (FSM) to return the sta-
pler unit to the home position. The stapler unit starts moving toward
the front of the stapler frame. It stops when the staple shift home
position sensor (FSTHPD) on the slide PCB located under the sta-
pler unit. Next, the staple shift motor (FSM) is driven a specified
number of pulses. The stapler unit moves to rear standby position
at the back of the machine, entering the standby state.
B. Stapling Operation
When stacking and alignment of paper on the processing tray are
complete, the finisher controller PCB drives the paddle motor
(FPM) in the reverse direction and lowers the swing guide. When
the swing guide descends, the paper stack is sandwiched between
the upper and lower stack delivery rollers.
The finisher control PCB shifts the stapler according to the speci-
fied staple position to perform stapling. (Only for B5-R, 1-position
bottom stapling is made at the rear side of 2-posiiton stapling.)
When the stapler shifts toward you, the process tray stopper is put
down to the lower side.
Sensor
Symbol
Connector
Function
Remarks
Staple shift 
home position 
sensor
FSTHPD
CN11-3
Detects the home 
position for the 
stapler moving 
back and forth.
Staple drive 
home position 
sensor
FSHPD
CN11-4
Detects the home 
position for the 
stapling operation
In the 
stapler
Self prime 
sensor
FSPD
CN11-5
Detects presence 
or absence of 
staples in the 
cartridge.
In the 
stapler
Staple empty 
sensor
FSD
CN11-6
Cartridge empty 
detection
In the 
stapler
Function
Motor
Symbol
Remarks
Moves the stapler.
Staple shift motor
FSM
Performs stapling operation
Staple motor
FFSM
Host machine delivery signal
Start signal
Entry paper sensor
(FFD)
Alignment tray sensor
(FAD)
Feed motor (FEM)
Bundle exit motor (FAM)
Delivery belt home
position sensor (FOBHPD)
Paddle motor (FPM)
Paddle home position
sensor (FPDHPD)
Bundle roller home position
sensor (FARHPD)
Staple safety switch
(FSSSW)
Alignment motor (front)
(FFJM)
Alignment home position
sensor (front) (FFJHPD)
Alignment motor (rear)
(FRJM)
Alignment home position
sensor (rear) (FRJHPD)
60msec
4 ms (A4)
30msec
220msec
Variable by the size
4 ms (A4)
4 ms (A4)
4 ms (A4)
: CW rotation
: CCW rotation
Paper stack
Staple
shift motor
(FSM)
Stapler
Staple shift home position sensor (FSTHPD)
Light-shielding plate
(Deliver direction)
Stapler
Swing guide
Stack delivery roller (upper)
Stack
delivery
roller
(lower)
Processing tray
stopper
Paper stack
Delivery tray
Paddle motor (
FPM)
Bundle roller home
position sensor
(FARHPD)
Light-shielding plate
Staple safety
switch
(FSSSW)
Swing guide
Stack delivery
roller (upper)
Stack delivery
roller (lower)
MX-FNX2/AR-PN1/MX-RBX1  OPERATIONAL DESCRIPTION  5 – 8
C. Delivery Operation after Stapling
When stapling is complete, the finisher controller PCB drives the
stack delivery motor (FAM) in the forward direction to feed the
paper stack (sandwiched between the stack delivery rollers) in the
delivery direction. The delivery belt home position sensor (FOB-
HPD) is turned OFF. The stack delivery motor (FAM) is driven a
specified number of pulses, causing the swing guide to ascend. At
the same time, the staple shift motor (FSM) is driven to return the
stapler back to the standby position, followed by driving of the stack
delivery motor (FAM). Then, the paper stack is delivered with the
nails of the delivery belt that rotates in sync with the stack delivery
rollers.
D. Stapler Unit
The staple motor (FFSM) is used to perform stapling operation.
This motor rotates the cam one turn for stapling. The home position
of this cam is detected by the staple drive home position sensor
(FSHPD).
The staple motor (FFSM) is rotated in the forward or reverse direc-
tion under the control of the macro computer (IC13) on the finisher
controller PCB.
When the staple drive home position sensor (FSHPD) is OFF, the
finisher controller PCB rotates the staple motor (FFSM) in the for-
ward direction until the sensor turns ON, allowing the staple cam to
the original position.
The staple empty sensor (FSD) is used to detect presence/
absence of a staple cartridge in the machine. The self prime sensor
(FSPD) is used to detect presence/absence of staples in the car-
tridge.
The finisher controller circuit does not drive the staple motor
(FFSM) unless the staple safety switch (FSSSW) is ON (the swing
guide is close). This assures safety in case where you happen to
put your finger in the stapler.
Stapler
Swing guide
Stack delivery
roller (lower)
Paper stack
Delivery tray
Delivery belt
Paddle motor (FPM)
Swing guide
Stack delivery
roller (lower)
Stack delivery roller
(upper)
Stack roller home position
sensor (FARHPD)
Light-shielding plate
Staple safety
switch
(FSSSW)
Finisher controller PCB
Staple
motor
dr
iv
e
signal
Car
tr
idge
detect
signal
Staple
empty
detect
signal
Staple
dr
iv
e
home
position
detect
signal
FFSM
MX-FNX2/AR-PN1/MX-RBX1  OPERATIONAL DESCRIPTION  5 – 9
(1) Stapler Movement Controller
The stapler unit is moved by the staple shift motor (FSM). Its home
position is detected by the staple shift home position sensor
(FSTHPD). The stapler waits at the back irrespective of the staple
mode and paper size. After paper has been stacked on the pro-
cessing tray, the stapler is moved to the specified stapling position
in response to the stapling command from the host machine.
The figure below shows the standby position of the stapler and the
stapling position depending on the staple mode.
1)
Front 1-point stapling
The stapler waits at the back. The stapler moves to and
returns from the stapling position for each stapling operation.
2)
Rear 1-point stapling
The stapler waits at the back. The stapling position is the same
as the standby position. (Except B5R)
3)
Middle 2-point stapling
The stapler waits at the back. The stapler moves to and
returns from the stapling position for each stapling operation.
The stapler first staples a paper stack at the rear stapling posi-
tion and then staples it at the front stapling position.
4)
Middle 2-point stapling (bind mode)
The stapler waits at the back. The stapler moves to and
returns from the stapling position for each stapling operation.
The stapler first staples a paper stack at the rear stapling posi-
tion and then staples it at the front stapling position.
Stapling Operation Sequence
Rear 1-point Stapling of 2 Sheets
Feed direction
Stapling position
Stopper
Stapler
Standby position
Feed direction
Stapler
Stopper
Standby position
Stapling position
Feed direction
Standby position
Stapler
Stapling position
Stopper
Stapling position
Feed direction
Standby position
Stapler
Stopper
Stapling position
Stapling position
Host machine delivery signal
Start signal
Entry paper sensor (FED)
Alignment tray sensor
(FAD)
Feed motor (FFM)
Bundle exit motor (FAM)
Paddle motor (FPM)
Paddle home position
sensor (FPDHPD)
Bundle roller home
position sensor (FARHPD)
Staple safety switch
(FSSSW)
Alignment motor (front)
(FFJM)
Alignment home position
sensor (front) (FFJHPD)
Staple motor (FFSM)
Staple drive home position
sensor (FSHPD)
: CW ro tatio n
Variable by the size
: CCW rotation
Exit belt home position
sensor (FOBHPD)
4ms (A4)
4ms (A4)
Stack delivery
10msec
20msec
Staple
MX-FNX2/AR-PN1/MX-RBX1  OPERATIONAL DESCRIPTION  5 – 10
4. Delivery Tray Operation
A. Outline
The machine has a delivery tray in the finisher unit and a bind tray
in the saddle unit.
The bind tray in the saddle unit is of the fixed type and all the folded
paper stacks are delivered to this tray. This tray has a bind tray
sensor (FFED) to detect presence/absence of paper.
The delivery tray in the finisher unit is moved up and down using a
lift motor (FLM).
The finisher has a tray paper sensor (FBED) to detect presence/
absence of paper on the stack tray.
The home position sensor of the delivery tray is detected by the
paper surface sensor (FSLD). When paper has already been
stacked on the delivery tray, the home position is on the top surface
of the stacked paper. When paper has not yet been stacked on the
delivery tray, the home position is at the position where the edge of
the delivery tray is detected. At power-on, the finisher controller
PCB drives the lift motor (FLM) to return the delivery tray to the
home position.
When the paper coming from the processing tray is stacked on the
delivery tray, the lift motor (FLM) is driven a specified number of
pulses, causing the delivery tray to descend. Clock pulses are
detected by the lift lock sensor (FLE). Then, the delivery tray
returns to the home position for the next stacking operation.
The upper limit of the delivery tray is detected by the lift upper limit
sensor (FULD). When the lift upper limit sensor (FULD) is turned
ON, the finisher controller PCB stops the lift motor (FLM) that is
ascending.
The lower limit of the delivery tray is detected by the lift lower limit
sensor (FLLD). When the lift lower limit sensor (FLLD) is turned
ON, the finisher controller PCB stops the lift motor (FLM) that is
descending.
The finisher unit has a tray middle sensor (FMLD) to detect over-
stacking of large-size or mixed paper according to the stack height.
5. Saddle Unit
A. Basic Operations
(1) Outline
The machine stitches a stack of sheets (middle 2-point), then folds
the stack in two in the finisher. These operations are controlled by
the finisher controller PCB.
The finisher controller PCB is controlled by the commands from the
host machine.
B. Feed/Drive System
(1) Outline
This machine stitches the paper stack coming from the finisher,
folds it, and delivers it to the bind tray in the saddle unit in response
to the commands from the host machine.
That is, the machine performs the following operations:
a. Paper feed-in
b. Stitching
c. Stack feed
d. Folding/delivery
a. Paper feed-in
After being aligned on the processing tray, a stack of sheets is
sandwiched between the stack delivery rollers. As the stack deliv-
ery rollers rotate, the stack is fed toward the saddle unit.
Tray paper sensor
(FBED)
Lift motor (FLM)
Lift lock sensor
(FLE)
Lift lower sensor
(FLLD)
Tray middle sensor
(FMLD)
Lift upper sensor
(FULD)
Delivery tray
Paper level sensor
(FSLD)
Edge
a) Paper feed-in
b) Stitching
c) Stack feed
d) Folding/delivery
Stack delivery roller (upper)
Paper stack
Stack delivery roller
(lower)
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