MX-FN19, MX-FN20, MX-PN12. All Sections - Sharp Copying Equipment Specification (repair manual). Page 116

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MX-FN19  OPERATIONAL DESCRIPTION  6 – 15
4) The paper folding rollers rotate again, feeding out the stack.
The paper pushing plate returns to its home position.
3. Intermediate stapling tray
A. Job offset
In the job offset mode, paper is shifted to the front or back by the
stack for delivery, and the stacks are sorted.
The paper delivered to the stapling tray is moved forward or back-
ward by the front alignment plate and the back alignment plate. The
aligned paper is stapled or discharged in accordance with the sig-
nals from the host machine. The finisher controller PCB drives the
alignment plate front motor (FFJM) and the alignment plate back
motor (FRJM) at power-on to return the two alignment plates to
their home positions.
Designations and functions of the motors and sensors to be used in
the stack job offset mode are shown below.
B. Stacking paper on stapling tray
After the trailing edge of paper passes through the first delivery
roller, the paper is delivered to the stapling tray by the delivery
roller and the return roller until it buts against the stapling tray stop-
per.
C. Offset operation
The front alignment plate or the back alignment plate shifts the
sheet delivered to the front or back. The offset operation is carried
out whenever paper is drawn into the stapling tray.
Paper folding motor
Paper pushing
plate motor
FS
FOM
FS
LGM
Equivalent of 20 mm
Gripping of paper stack
Equivalent of 20 mm
(reverse feeding)
Paper folding motor (FSFOM)
Paper pushing plate motor (FSLGM)
Paper pushing plate home position sensor (FSLGHPD)
Paper pushing plate top position sensor (FSLGTD)
Delivery sensor (FSPDD)
Tray paper sensor (FSTPD)
Paper folding home position sensor (FSFOHPD)
:Motor CW
:Motor CCW
Alignment front home
position sensor (FFJHPD)
Front alignment
plate
Alignment back home
position sensor (FRJHPD)
Shielding plate
Back alignment
plate
Paper
Alignment plate back motor
(FRJM)
Alignment plate front motor (FFJM)
(Front)
Shielding plate
Results of Delivering 4sets job offset
4th set
2nd set
3rd set
1st set
Delivery direction
Motor
Function
Alignment plate front motor 
(FFJM)
Aligns paper in stapling tray at front
Alignment plate back motor 
(FRJM)
Aligns paper in stapling tray at back
Swing motor (FSWM)
Raises or lowers swing guide
Trailing edge assist motor 
(FASM)
Delivers trailing edge of paper stack
Sensor
Function
Swing guide home position 
sensor (FSWHPD)
Detects home position of swing guide
Alignment plate front home 
position sensor (FFJHPD)
Detects home position of alignment front 
plate
Alignment plate back home 
position sensor (FRJHPD)
Detects home position of alignment back 
plate
Trailing edge assist home 
position sensor (FASHPD)
Detects home position of trailing edge 
assist
Stack delivery
roller
No.1 delivery roller
Return roller
Stapling tray stopper
Back alignment plate
Offset sheet
Front alignment plate
Tray
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